Multi platform build requires explicit buildx setup

* Add user option for docker exec

* Add test for user option

* Return test version for image

* remove gitea config file

* refactor tests

* remove comments & fix image name

* add docs

* cleanup

* Update README.md with suggested correction

Co-authored-by: Frederik Ring <frederik.ring@gmail.com>

* fix backup command & bind folder instead of volume

---------

Co-authored-by: tao <generaltao.md@gmail.com>
Co-authored-by: Frederik Ring <frederik.ring@gmail.com>

.circleci/config.yml

@@ -1,75 +0,0 @@
-version: 2.1
-
-jobs:
-  canary:
-    machine:
-      image: ubuntu-2004:202201-02
-    working_directory: ~/docker-volume-backup
-    resource_class: large
-    steps:
-      - checkout
-      - run:
-          name: Build
-          command: |
-            docker build . -t offen/docker-volume-backup:canary
-      - run:
-          name: Install gnupg
-          command: |
-            sudo apt-get install -y gnupg
-      - run:
-          name: Run tests
-          working_directory: ~/docker-volume-backup/test
-          command: |
-            export GPG_TTY=$(tty)
-            ./test.sh canary
-
-  build:
-    docker:
-      - image: cimg/base:2020.06
-        environment:
-          DOCKER_BUILDKIT: '1'
-          DOCKER_CLI_EXPERIMENTAL: enabled
-    working_directory: ~/docker-volume-backup
-    resource_class: large
-    steps:
-      - checkout
-      - setup_remote_docker:
-          version: 20.10.6
-      - docker/install-docker-credential-helper:
-          release-tag: v0.6.4
-      - docker/configure-docker-credentials-store
-      - run:
-          name: Push to Docker Hub
-          command: |
-            echo "$DOCKER_ACCESSTOKEN" | docker login --username offen --password-stdin
-            # This is required for building ARM: https://gitlab.alpinelinux.org/alpine/aports/-/issues/12406
-            docker run --rm --privileged linuxkit/binfmt:v0.8
-            docker context create docker-volume-backup
-            docker buildx create docker-volume-backup --name docker-volume-backup --use
-            docker buildx inspect --bootstrap
-            tag_args="-t offen/docker-volume-backup:$CIRCLE_TAG"
-            if [[ "$CIRCLE_TAG" =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
-              # prerelease tags like `v2.0.0-alpha.1` should not be released as `latest`
-              tag_args="$tag_args -t offen/docker-volume-backup:latest"
-              tag_args="$tag_args -t offen/docker-volume-backup:$(echo "$CIRCLE_TAG" | cut -d. -f1)"
-            fi
-            docker buildx build --platform linux/amd64,linux/arm64,linux/arm/v7 \
-               $tag_args . --push
-
-workflows:
-  version: 2
-  docker_image:
-    jobs:
-      - canary:
-          filters:
-            tags:
-              ignore: /^v.*/
-      - build:
-          filters:
-            branches:
-              ignore: /.*/
-            tags:
-              only: /^v.*/
-
-orbs:
-  docker: circleci/docker@2.1.4

.github/ISSUE_TEMPLATE/bug_report.md

@@ -8,7 +8,9 @@ assignees: ''
 ---
 
 **Describe the bug**
+<!--
 A clear and concise description of what the bug is.
+-->
 
 **To Reproduce**
 Steps to reproduce the behavior:
@@ -17,12 +19,16 @@ Steps to reproduce the behavior:
 3. ...
 
 **Expected behavior**
+<!--
 A clear and concise description of what you expected to happen.
+-->
 
-**Desktop (please complete the following information):**
+**Version (please complete the following information):**
- - Image Version: [e.g. v2.21.0]
+ - Image Version: <!-- e.g. v2.21.0 -->
- - Docker Version: [e.g. 20.10.17]
+ - Docker Version: <!-- e.g. 20.10.17 -->
- - Docker Compose Version (if applicable): [e.g. 1.29.2]
+ - Docker Compose Version (if applicable): <!-- e.g. 1.29.2 -->
 
 **Additional context**
+<!--
 Add any other context about the problem here.
+-->

.github/ISSUE_TEMPLATE/feature_request.md

@@ -8,13 +8,21 @@ assignees: ''
 ---
 
 **Is your feature request related to a problem? Please describe.**
+<!--
 A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+-->
 
 **Describe the solution you'd like**
+<!--
 A clear and concise description of what you want to happen.
+-->
 
 **Describe alternatives you've considered**
+<!--
 A clear and concise description of any alternative solutions or features you've considered.
+-->
 
 **Additional context**
+<!--
 Add any other context or screenshots about the feature request here.
+-->

.github/ISSUE_TEMPLATE/support_request.md

@@ -8,13 +8,21 @@ assignees: ''
 ---
 
 **What are you trying to do?**
+<!--
 A clear and concise description of what you are trying to do, but cannot get working.
+-->
 
 **What is your current configuration?**
+<!--
 Add the full configuration you are using. Please redact out any real-world credentials.
+-->
 
 **Log output**
+<!--
 Provide the full log output of your setup.
+-->
 
 **Additional context**
+<!--
 Add any other context or screenshots about the support request here.
+-->

.github/workflows/release.yml

@@ -0,0 +1,59 @@
+name: Release Docker Image
+
+on:
+  push:
+    tags: v**
+
+jobs:
+  push_to_registries:
+    name: Push Docker image to multiple registries
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+      contents: read
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v3
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Log in to GHCR
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract Docker tags
+        id: meta
+        run: |
+          version_tag="${{github.ref_name}}"
+          tags=($version_tag)
+          if [[ "$version_tag" =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+            # prerelease tags like `v2.0.0-alpha.1` should not be released as `latest` nor `v2`
+            tags+=("latest")
+            tags+=($(echo "$version_tag" | cut -d. -f1))
+          fi
+          releases=""
+          for tag in "${tags[@]}"; do
+            releases="${releases:+$releases,}offen/docker-volume-backup:$tag,ghcr.io/offen/docker-volume-backup:$tag"
+          done
+          echo "releases=$releases" >> "$GITHUB_OUTPUT"
+
+      - name: Build and push Docker images
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          push: true
+          platforms: linux/amd64,linux/arm64,linux/arm/v7
+          tags: ${{ steps.meta.outputs.releases }}

.github/workflows/test.yml

@@ -0,0 +1,18 @@
+name: Run Integration Tests
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  test:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v3
+      - name: Build Docker Image
+        run: docker build . -t offen/docker-volume-backup:test
+      - name: Run Tests
+        working-directory: ./test
+        run: |
+          export GPG_TTY=$(tty)
+          ./test.sh test

Dockerfile

@@ -1,7 +1,7 @@
 # Copyright 2021 - Offen Authors <hioffen@posteo.de>
 # SPDX-License-Identifier: MPL-2.0
 
-FROM golang:1.19-alpine as builder
+FROM golang:1.20-alpine as builder
 
 WORKDIR /app
 COPY . .
@@ -9,7 +9,7 @@ RUN go mod download
 WORKDIR /app/cmd/backup
 RUN go build -o backup .
 
-FROM alpine:3.16
+FROM alpine:3.17
 
 WORKDIR /root
 

README.md

@@ -4,10 +4,10 @@
 
 # docker-volume-backup
 
-Backup Docker volumes locally or to any S3 compatible storage.
+Backup Docker volumes locally or to any S3, WebDAV, Azure Blob Storage or SSH compatible storage.
 
 The [offen/docker-volume-backup](https://hub.docker.com/r/offen/docker-volume-backup) Docker image can be used as a lightweight (below 15MB) sidecar container to an existing Docker setup.
-It handles __recurring or one-off backups of Docker volumes__ to a __local directory__, __any S3, WebDAV or SSH compatible storage (or any combination) and rotates away old backups__ if configured. It also supports __encrypting your backups using GPG__ and __sending notifications for failed backup runs__.
+It handles __recurring or one-off backups of Docker volumes__ to a __local directory__, __any S3, WebDAV, Azure Blob Storage or SSH compatible storage (or any combination) and rotates away old backups__ if configured. It also supports __encrypting your backups using GPG__ and __sending notifications for failed backup runs__.
 
 <!-- MarkdownTOC -->
 
@@ -30,6 +30,7 @@ It handles __recurring or one-off backups of Docker volumes__ to a __local direc
   - [Replace deprecated `BACKUP_FROM_SNAPSHOT` usage](#replace-deprecated-backup_from_snapshot-usage)
   - [Replace deprecated `exec-pre` and `exec-post` labels](#replace-deprecated-exec-pre-and-exec-post-labels)
   - [Using a custom Docker host](#using-a-custom-docker-host)
+  - [Use with rootless Docker](#use-with-rootless-docker)
   - [Run multiple backup schedules in the same container](#run-multiple-backup-schedules-in-the-same-container)
   - [Define different retention schedules](#define-different-retention-schedules)
   - [Use special characters in notification URLs](#use-special-characters-in-notification-urls)
@@ -41,6 +42,7 @@ It handles __recurring or one-off backups of Docker volumes__ to a __local direc
   - [Backing up to MinIO \(using Docker secrets\)](#backing-up-to-minio-using-docker-secrets)
   - [Backing up to WebDAV](#backing-up-to-webdav)
   - [Backing up to SSH](#backing-up-to-ssh)
+  - [Backing up to Azure Blob Storage](#backing-up-to-azure-blob-storage)
   - [Backing up locally](#backing-up-locally)
   - [Backing up to AWS S3 as well as locally](#backing-up-to-aws-s3-as-well-as-locally)
   - [Running on a custom cron schedule](#running-on-a-custom-cron-schedule)
@@ -304,6 +306,25 @@ You can populate below template according to your requirements and use it as you
 
 # SSH_IDENTITY_PASSPHRASE="pass"
 
+# The credential's account name when using Azure Blob Storage. This has to be
+# set when using Azure Blob Storage.
+
+# AZURE_STORAGE_ACCOUNT_NAME="account-name"
+
+# The credential's primary account key when using Azure Blob Storage. If this
+# is not given, the command tries to fall back to using a managed identity.
+
+# AZURE_STORAGE_PRIMARY_ACCOUNT_KEY="<xxx>"
+
+# The container name when using Azure Blob Storage.
+
+# AZURE_STORAGE_CONTAINER_NAME="container-name"
+
+# The service endpoint when using Azure Blob Storage. This is a template that
+# can be passed the account name as shown in the default value below.
+
+# AZURE_STORAGE_ENDPOINT="https://{{ .AccountName }}.blob.core.windows.net/"
+
 # In addition to storing backups remotely, you can also keep local copies.
 # Pass a container-local path to store your backups if needed. You also need to
 # mount a local folder or Docker volume into that location (`/archive`
@@ -623,6 +644,8 @@ volumes:
 The backup procedure is guaranteed to wait for all `pre` or `post` commands to finish before proceeding.
 However there are no guarantees about the order in which they are run, which could also happen concurrently.
 
+By default the backup command is executed by the root user. It is possible to specify a custom user in container labels with the format `docker-volume-backup.[step]-[pre|post]-[user]`. The option will allow you to run a specific step command by specified user. Make sure the user exists and present in `passwd` inside the target container.
+
 ### Encrypting your backup using GPG
 
 The image supports encrypting backups using GPG out of the box.
@@ -762,7 +785,7 @@ services:
       - docker-volume-backup.archive-post=rm -rf /tmp/backup/my-app
 
   backup:
-    image: offen/docker-volume-backup:latest
+    image: offen/docker-volume-backup:v2
     environment:
       BACKUP_SOURCES: /tmp/backup
     volumes:
@@ -800,6 +823,23 @@ DOCKER_HOST=tcp://docker_socket_proxy:2375
 
 In case you are using a socket proxy, it must support `GET` and `POST` requests to the `/containers` endpoint. If you are using Docker Swarm, it must also support the `/services` endpoint. If you are using pre/post backup commands, it must also support the `/exec` endpoint.
 
+### Use with rootless Docker
+
+It's also possible to use this image with a [rootless Docker installation][rootless-docker].
+Instead of mounting `/var/run/docker.sock`, mount the user-specific socket into the container:
+
+```yml
+services:
+  backup:
+    image: offen/docker-volume-backup:v2
+    # ... configuration omitted
+    volumes:
+      - backup:/backup:ro
+      - /run/user/1000/docker.sock:/var/run/docker.sock:ro
+```
+
+[rootless-docker]: https://docs.docker.com/engine/security/rootless/
+
 ### Run multiple backup schedules in the same container
 
 Multiple backup schedules with different configuration can be configured by mounting an arbitrary number of configuration files (using the `.env` format) into `/etc/dockervolumebackup/conf.d`:
@@ -902,8 +942,7 @@ If you want to use a non-supported storage backend, or want to use a third party
 For example, if you wanted to use `rsync`, define your Docker image like this:
 
 ```Dockerfile
-ARG version=canary
+FROM offen/docker-volume-backup:v2
-FROM offen/docker-volume-backup:$version
 
 RUN apk add rsync
 ```
@@ -1080,6 +1119,27 @@ volumes:
   data:
 ```
 
+### Backing up to Azure Blob Storage
+
+```yml
+version: '3'
+
+services:
+  # ... define other services using the `data` volume here
+  backup:
+    image: offen/docker-volume-backup:v2
+    environment:
+      AZURE_STORAGE_CONTAINER_NAME: backup-container
+      AZURE_STORAGE_ACCOUNT_NAME: account-name
+      AZURE_STORAGE_PRIMARY_ACCOUNT_KEY: Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw==
+    volumes:
+      - data:/backup/my-app-backup:ro
+      - /var/run/docker.sock:/var/run/docker.sock:ro
+
+volumes:
+  data:
+```
+
 ### Backing up locally
 
 ```yml

cmd/backup/config.go

@@ -16,53 +16,58 @@ import (
 // Config holds all configuration values that are expected to be set
 // by users.
 type Config struct {
-	AwsS3BucketName            string        `split_words:"true"`
+	AwsS3BucketName               string        `split_words:"true"`
-	AwsS3Path                  string        `split_words:"true"`
+	AwsS3Path                     string        `split_words:"true"`
-	AwsEndpoint                string        `split_words:"true" default:"s3.amazonaws.com"`
+	AwsEndpoint                   string        `split_words:"true" default:"s3.amazonaws.com"`
-	AwsEndpointProto           string        `split_words:"true" default:"https"`
+	AwsEndpointProto              string        `split_words:"true" default:"https"`
-	AwsEndpointInsecure        bool          `split_words:"true"`
+	AwsEndpointInsecure           bool          `split_words:"true"`
-	AwsEndpointCACert          CertDecoder   `envconfig:"AWS_ENDPOINT_CA_CERT"`
+	AwsEndpointCACert             CertDecoder   `envconfig:"AWS_ENDPOINT_CA_CERT"`
-	AwsStorageClass            string        `split_words:"true"`
+	AwsStorageClass               string        `split_words:"true"`
-	AwsAccessKeyID             string        `envconfig:"AWS_ACCESS_KEY_ID"`
+	AwsAccessKeyID                string        `envconfig:"AWS_ACCESS_KEY_ID"`
-	AwsAccessKeyIDFile         string        `envconfig:"AWS_ACCESS_KEY_ID_FILE"`
+	AwsAccessKeyIDFile            string        `envconfig:"AWS_ACCESS_KEY_ID_FILE"`
-	AwsSecretAccessKey         string        `split_words:"true"`
+	AwsSecretAccessKey            string        `split_words:"true"`
-	AwsSecretAccessKeyFile     string        `split_words:"true"`
+	AwsSecretAccessKeyFile        string        `split_words:"true"`
-	AwsIamRoleEndpoint         string        `split_words:"true"`
+	AwsIamRoleEndpoint            string        `split_words:"true"`
-	BackupSources              string        `split_words:"true" default:"/backup"`
+	BackupSources                 string        `split_words:"true" default:"/backup"`
-	BackupFilename             string        `split_words:"true" default:"backup-%Y-%m-%dT%H-%M-%S.tar.gz"`
+	BackupFilename                string        `split_words:"true" default:"backup-%Y-%m-%dT%H-%M-%S.tar.gz"`
-	BackupFilenameExpand       bool          `split_words:"true"`
+	BackupFilenameExpand          bool          `split_words:"true"`
-	BackupLatestSymlink        string        `split_words:"true"`
+	BackupLatestSymlink           string        `split_words:"true"`
-	BackupArchive              string        `split_words:"true" default:"/archive"`
+	BackupArchive                 string        `split_words:"true" default:"/archive"`
-	BackupRetentionDays        int32         `split_words:"true" default:"-1"`
+	BackupRetentionDays           int32         `split_words:"true" default:"-1"`
-	BackupPruningLeeway        time.Duration `split_words:"true" default:"1m"`
+	BackupPruningLeeway           time.Duration `split_words:"true" default:"1m"`
-	BackupPruningPrefix        string        `split_words:"true"`
+	BackupPruningPrefix           string        `split_words:"true"`
-	BackupStopContainerLabel   string        `split_words:"true" default:"true"`
+	BackupStopContainerLabel      string        `split_words:"true" default:"true"`
-	BackupFromSnapshot         bool          `split_words:"true"`
+	BackupFromSnapshot            bool          `split_words:"true"`
-	BackupExcludeRegexp        RegexpDecoder `split_words:"true"`
+	BackupExcludeRegexp           RegexpDecoder `split_words:"true"`
-	GpgPassphrase              string        `split_words:"true"`
+	GpgPassphrase                 string        `split_words:"true"`
-	NotificationURLs           []string      `envconfig:"NOTIFICATION_URLS"`
+	NotificationURLs              []string      `envconfig:"NOTIFICATION_URLS"`
-	NotificationLevel          string        `split_words:"true" default:"error"`
+	NotificationLevel             string        `split_words:"true" default:"error"`
-	EmailNotificationRecipient string        `split_words:"true"`
+	EmailNotificationRecipient    string        `split_words:"true"`
-	EmailNotificationSender    string        `split_words:"true" default:"noreply@nohost"`
+	EmailNotificationSender       string        `split_words:"true" default:"noreply@nohost"`
-	EmailSMTPHost              string        `envconfig:"EMAIL_SMTP_HOST"`
+	EmailSMTPHost                 string        `envconfig:"EMAIL_SMTP_HOST"`
-	EmailSMTPPort              int           `envconfig:"EMAIL_SMTP_PORT" default:"587"`
+	EmailSMTPPort                 int           `envconfig:"EMAIL_SMTP_PORT" default:"587"`
-	EmailSMTPUsername          string        `envconfig:"EMAIL_SMTP_USERNAME"`
+	EmailSMTPUsername             string        `envconfig:"EMAIL_SMTP_USERNAME"`
-	EmailSMTPPassword          string        `envconfig:"EMAIL_SMTP_PASSWORD"`
+	EmailSMTPPassword             string        `envconfig:"EMAIL_SMTP_PASSWORD"`
-	WebdavUrl                  string        `split_words:"true"`
+	WebdavUrl                     string        `split_words:"true"`
-	WebdavUrlInsecure          bool          `split_words:"true"`
+	WebdavUrlInsecure             bool          `split_words:"true"`
-	WebdavPath                 string        `split_words:"true" default:"/"`
+	WebdavPath                    string        `split_words:"true" default:"/"`
-	WebdavUsername             string        `split_words:"true"`
+	WebdavUsername                string        `split_words:"true"`
-	WebdavPassword             string        `split_words:"true"`
+	WebdavPassword                string        `split_words:"true"`
-	SSHHostName                string        `split_words:"true"`
+	SSHHostName                   string        `split_words:"true"`
-	SSHPort                    string        `split_words:"true" default:"22"`
+	SSHPort                       string        `split_words:"true" default:"22"`
-	SSHUser                    string        `split_words:"true"`
+	SSHUser                       string        `split_words:"true"`
-	SSHPassword                string        `split_words:"true"`
+	SSHPassword                   string        `split_words:"true"`
-	SSHIdentityFile            string        `split_words:"true" default:"/root/.ssh/id_rsa"`
+	SSHIdentityFile               string        `split_words:"true" default:"/root/.ssh/id_rsa"`
-	SSHIdentityPassphrase      string        `split_words:"true"`
+	SSHIdentityPassphrase         string        `split_words:"true"`
-	SSHRemotePath              string        `split_words:"true"`
+	SSHRemotePath                 string        `split_words:"true"`
-	ExecLabel                  string        `split_words:"true"`
+	ExecLabel                     string        `split_words:"true"`
-	ExecForwardOutput          bool          `split_words:"true"`
+	ExecForwardOutput             bool          `split_words:"true"`
-	LockTimeout                time.Duration `split_words:"true" default:"60m"`
+	LockTimeout                   time.Duration `split_words:"true" default:"60m"`
+	AzureStorageAccountName       string        `split_words:"true"`
+	AzureStoragePrimaryAccountKey string        `split_words:"true"`
+	AzureStorageContainerName     string        `split_words:"true"`
+	AzureStoragePath              string        `split_words:"true"`
+	AzureStorageEndpoint          string        `split_words:"true" default:"https://{{ .AccountName }}.blob.core.windows.net/"`
 }
 
 func (c *Config) resolveSecret(envVar string, secretPath string) (string, error) {

cmd/backup/exec.go

@@ -21,7 +21,7 @@ import (
 	"golang.org/x/sync/errgroup"
 )
 
-func (s *script) exec(containerRef string, command string) ([]byte, []byte, error) {
+func (s *script) exec(containerRef string, command string, user string) ([]byte, []byte, error) {
 	args, _ := argv.Argv(command, nil, nil)
 	commandEnv := []string{
 		fmt.Sprintf("COMMAND_RUNTIME_ARCHIVE_FILEPATH=%s", s.file),
@@ -31,6 +31,7 @@ func (s *script) exec(containerRef string, command string) ([]byte, []byte, erro
 		AttachStdin:  true,
 		AttachStderr: true,
 		Env:          commandEnv,
+		User:         user,
 	})
 	if err != nil {
 		return nil, nil, fmt.Errorf("exec: error creating container exec: %w", err)
@@ -159,8 +160,11 @@ func (s *script) runLabeledCommands(label string) error {
 				cmd, _ = c.Labels["docker-volume-backup.exec-post"]
 			}
 
+			userLabelName := fmt.Sprintf("%s.user", label)
+			user := c.Labels[userLabelName]
+
 			s.logger.Infof("Running %s command %s for container %s", label, cmd, strings.TrimPrefix(c.Names[0], "/"))
-			stdout, stderr, err := s.exec(c.ID, cmd)
+			stdout, stderr, err := s.exec(c.ID, cmd, user)
 			if s.c.ExecForwardOutput {
 				os.Stderr.Write(stderr)
 				os.Stdout.Write(stdout)

cmd/backup/hooks.go

@@ -4,10 +4,9 @@
 package main
 
 import (
+	"errors"
 	"fmt"
 	"sort"
-
-	"github.com/offen/docker-volume-backup/internal/utilities"
 )
 
 // hook contains a queued action that can be trigger them when the script
@@ -52,7 +51,7 @@ func (s *script) runHooks(err error) error {
 		}
 	}
 	if len(actionErrors) != 0 {
-		return utilities.Join(actionErrors...)
+		return errors.Join(actionErrors...)
 	}
 	return nil
 }

cmd/backup/notifications.go

@@ -6,13 +6,13 @@ package main
 import (
 	"bytes"
 	_ "embed"
+	"errors"
 	"fmt"
 	"os"
 	"text/template"
 	"time"
 
 	sTypes "github.com/containrrr/shoutrrr/pkg/types"
-	"github.com/offen/docker-volume-backup/internal/utilities"
 )
 
 //go:embed notifications.tmpl
@@ -69,7 +69,7 @@ func (s *script) sendNotification(title, body string) error {
 		}
 	}
 	if len(errs) != 0 {
-		return fmt.Errorf("sendNotification: error sending message: %w", utilities.Join(errs...))
+		return fmt.Errorf("sendNotification: error sending message: %w", errors.Join(errs...))
 	}
 	return nil
 }

cmd/backup/script.go

@@ -5,6 +5,7 @@ package main
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"io"
 	"io/fs"
@@ -15,11 +16,11 @@ import (
 	"time"
 
 	"github.com/offen/docker-volume-backup/internal/storage"
+	"github.com/offen/docker-volume-backup/internal/storage/azure"
 	"github.com/offen/docker-volume-backup/internal/storage/local"
 	"github.com/offen/docker-volume-backup/internal/storage/s3"
 	"github.com/offen/docker-volume-backup/internal/storage/ssh"
 	"github.com/offen/docker-volume-backup/internal/storage/webdav"
-	"github.com/offen/docker-volume-backup/internal/utilities"
 
 	"github.com/containrrr/shoutrrr"
 	"github.com/containrrr/shoutrrr/pkg/router"
@@ -76,6 +77,7 @@ func newScript() (*script, error) {
 				"WebDAV": {},
 				"SSH":    {},
 				"Local":  {},
+				"Azure":  {},
 			},
 		},
 	}
@@ -108,7 +110,7 @@ func newScript() (*script, error) {
 		s.cli = cli
 	}
 
-	logFunc := func(logType storage.LogLevel, context string, msg string, params ...interface{}) {
+	logFunc := func(logType storage.LogLevel, context string, msg string, params ...any) {
 		switch logType {
 		case storage.LogLevelWarning:
 			s.logger.Warnf("["+context+"] "+msg, params...)
@@ -189,6 +191,21 @@ func newScript() (*script, error) {
 		s.storages = append(s.storages, localBackend)
 	}
 
+	if s.c.AzureStorageAccountName != "" {
+		azureConfig := azure.Config{
+			ContainerName:     s.c.AzureStorageContainerName,
+			AccountName:       s.c.AzureStorageAccountName,
+			PrimaryAccountKey: s.c.AzureStoragePrimaryAccountKey,
+			Endpoint:          s.c.AzureStorageEndpoint,
+			RemotePath:        s.c.AzureStoragePath,
+		}
+		azureBackend, err := azure.NewStorageBackend(azureConfig, logFunc)
+		if err != nil {
+			return nil, err
+		}
+		s.storages = append(s.storages, azureBackend)
+	}
+
 	if s.c.EmailNotificationRecipient != "" {
 		emailURL := fmt.Sprintf(
 			"smtp://%s:%s@%s:%d/?from=%s&to=%s",
@@ -312,7 +329,7 @@ func (s *script) stopContainers() (func() error, error) {
 		stopError = fmt.Errorf(
 			"stopContainers: %d error(s) stopping containers: %w",
 			len(stopErrors),
-			utilities.Join(stopErrors...),
+			errors.Join(stopErrors...),
 		)
 	}
 
@@ -363,7 +380,7 @@ func (s *script) stopContainers() (func() error, error) {
 			return fmt.Errorf(
 				"stopContainers: %d error(s) restarting containers and services: %w",
 				len(restartErrors),
-				utilities.Join(restartErrors...),
+				errors.Join(restartErrors...),
 			)
 		}
 		s.logger.Infof(

docs/NOTIFICATION-TEMPLATES.md

@@ -25,7 +25,7 @@ Here is a list of all data passed to the template:
     * `FullPath`: full path of the backup file (e.g. `/archive/backup-2022-02-11T01-00-00.tar.gz`)
     * `Size`: size in bytes of the backup file
   * `Storages`: object that holds stats about each storage
-    * `Local`, `S3`, `WebDAV` or `SSH`:
+    * `Local`, `S3`, `WebDAV`, `Azure` or `SSH`:
       * `Total`: total number of backup files
       * `Pruned`: number of backup files that were deleted due to pruning rule
       * `PruneErrors`: number of backup files that were unable to be pruned

go.mod

@@ -3,7 +3,9 @@ module github.com/offen/docker-volume-backup
 go 1.19
 
 require (
-	github.com/containrrr/shoutrrr v0.5.2
+	github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.2.0
+	github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v0.6.1
+	github.com/containrrr/shoutrrr v0.6.0
 	github.com/cosiner/argv v0.1.0
 	github.com/docker/docker v20.10.11+incompatible
 	github.com/gofrs/flock v0.8.1
@@ -19,15 +21,18 @@ require (
 )
 
 require (
+	github.com/Azure/azure-sdk-for-go/sdk/azcore v1.1.4 // indirect
+	github.com/Azure/azure-sdk-for-go/sdk/internal v1.0.1 // indirect
+	github.com/AzureAD/microsoft-authentication-library-for-go v0.7.0 // indirect
 	github.com/Microsoft/go-winio v0.5.2 // indirect
-	github.com/containerd/containerd v1.6.6 // indirect
+	github.com/containerd/containerd v1.6.18 // indirect
-	github.com/docker/distribution v2.7.1+incompatible // indirect
+	github.com/docker/distribution v2.8.0+incompatible // indirect
 	github.com/docker/go-connections v0.4.0 // indirect
 	github.com/docker/go-units v0.4.0 // indirect
 	github.com/dustin/go-humanize v1.0.0 // indirect
 	github.com/fatih/color v1.10.0 // indirect
-	github.com/fsnotify/fsnotify v1.4.9 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/golang-jwt/jwt/v4 v4.4.2 // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/google/uuid v1.3.0 // indirect
 	github.com/gorilla/mux v1.7.3 // indirect
@@ -36,6 +41,7 @@ require (
 	github.com/klauspost/cpuid/v2 v2.2.1 // indirect
 	github.com/kr/fs v0.1.0 // indirect
 	github.com/kr/text v0.2.0 // indirect
+	github.com/kylelemons/godebug v1.1.0 // indirect
 	github.com/mattn/go-colorable v0.1.8 // indirect
 	github.com/mattn/go-isatty v0.0.12 // indirect
 	github.com/minio/md5-simd v1.1.2 // indirect
@@ -45,22 +51,18 @@ require (
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/morikuni/aec v1.0.0 // indirect
 	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
-	github.com/nxadm/tail v1.4.6 // indirect
-	github.com/onsi/ginkgo v1.14.2 // indirect
 	github.com/onsi/gomega v1.10.3 // indirect
 	github.com/opencontainers/go-digest v1.0.0 // indirect
 	github.com/opencontainers/image-spec v1.0.3-0.20211202183452-c5a74bcca799 // indirect
+	github.com/pkg/browser v0.0.0-20210115035449-ce105d075bb4 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/rs/xid v1.4.0 // indirect
-	golang.org/x/net v0.2.0 // indirect
+	golang.org/x/net v0.7.0 // indirect
-	golang.org/x/sys v0.2.0 // indirect
+	golang.org/x/sys v0.5.0 // indirect
-	golang.org/x/text v0.4.0 // indirect
+	golang.org/x/text v0.7.0 // indirect
-	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 	google.golang.org/genproto v0.0.0-20220602131408-e326c6e8e9c8 // indirect
 	google.golang.org/grpc v1.47.0 // indirect
 	google.golang.org/protobuf v1.28.0 // indirect
 	gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
-	gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
 )

go.sum

@@ -1,12 +1,21 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+github.com/Azure/azure-sdk-for-go/sdk/azcore v1.1.4 h1:pqrAR74b6EoR4kcxF7L7Wg2B8Jgil9UUZtMvxhEFqWo=
+github.com/Azure/azure-sdk-for-go/sdk/azcore v1.1.4/go.mod h1:uGG2W01BaETf0Ozp+QxxKJdMBNRWPdstHG0Fmdwn1/U=
+github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.2.0 h1:t/W5MYAuQy81cvM8VUNfRLzhtKpXhVUAN7Cd7KVbTyc=
+github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.2.0/go.mod h1:NBanQUfSWiWn3QEpWDTCU0IjBECKOYvl2R8xdRtMtiM=
+github.com/Azure/azure-sdk-for-go/sdk/internal v1.0.1 h1:XUNQ4mw+zJmaA2KXzP9JlQiecy1SI+Eog7xVkPiqIbg=
+github.com/Azure/azure-sdk-for-go/sdk/internal v1.0.1/go.mod h1:eWRD7oawr1Mu1sLCawqVc0CUiF43ia3qQMxLscsKQ9w=
+github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v0.6.1 h1:YvQv9Mz6T8oR5ypQOL6erY0Z5t71ak1uHV4QFokCOZk=
+github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v0.6.1/go.mod h1:c6WvOhtmjNUWbLfOG1qxM/q0SPvQNSVJvolm+C52dIU=
 github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78 h1:w+iIsaOQNcT7OZ575w+acHgRric5iCyQh+xv+KJ4HB8=
 github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
+github.com/AzureAD/microsoft-authentication-library-for-go v0.7.0 h1:VgSJlZH5u0k2qxSpqyghcFQKmvYckj46uymKK5XzkBM=
+github.com/AzureAD/microsoft-authentication-library-for-go v0.7.0/go.mod h1:BDJ5qMFKx9DugEg3+uQSDCdbYPr5s9vBTrL9P8TpqOU=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/Microsoft/go-winio v0.5.2 h1:a9IhgEQBCUEk6QCdml9CiJGhAws+YwffDHEMp1VMrpA=
 github.com/Microsoft/go-winio v0.5.2/go.mod h1:WpS1mjBmmwHBEWmogvA2mj8546UReBk4v8QkMxJ6pZY=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
-github.com/agnivade/wasmbrowsertest v0.3.1/go.mod h1:zQt6ZTdl338xxRaMW395qccVE2eQm0SjC/SDz0mPWQI=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
@@ -16,12 +25,6 @@ github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+Ce
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
-github.com/chromedp/cdproto v0.0.0-20190614062957-d6d2f92b486d/go.mod h1:S8mB5wY3vV+vRIzf39xDXsw3XKYewW9X6rW2aEmkrSw=
-github.com/chromedp/cdproto v0.0.0-20190621002710-8cbd498dd7a0/go.mod h1:S8mB5wY3vV+vRIzf39xDXsw3XKYewW9X6rW2aEmkrSw=
-github.com/chromedp/cdproto v0.0.0-20190812224334-39ef923dcb8d/go.mod h1:0YChpVzuLJC5CPr+x3xkHN6Z8KOSXjNbL7qV8Wc4GW0=
-github.com/chromedp/cdproto v0.0.0-20190926234355-1b4886c6fad6/go.mod h1:0YChpVzuLJC5CPr+x3xkHN6Z8KOSXjNbL7qV8Wc4GW0=
-github.com/chromedp/chromedp v0.3.1-0.20190619195644-fd957a4d2901/go.mod h1:mJdvfrVn594N9tfiPecUidF6W5jPRKHymqHfzbobPsM=
-github.com/chromedp/chromedp v0.4.0/go.mod h1:DC3QUn4mJ24dwjcaGQLoZrhm4X/uPHZ6spDbS2uFhm4=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
@@ -29,27 +32,27 @@ github.com/cncf/udpa/go v0.0.0-20210930031921-04548b0d99d4/go.mod h1:6pvJx4me5XP
 github.com/cncf/xds/go v0.0.0-20210922020428-25de7278fc84/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/cncf/xds/go v0.0.0-20211001041855-01bcc9b48dfe/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/cncf/xds/go v0.0.0-20211011173535-cb28da3451f1/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
-github.com/containerd/containerd v1.6.6 h1:xJNPhbrmz8xAMDNoVjHy9YHtWwEQNS+CDkcIRh7t8Y0=
+github.com/containerd/containerd v1.6.18 h1:qZbsLvmyu+Vlty0/Ex5xc0z2YtKpIsb5n45mAMI+2Ns=
-github.com/containerd/containerd v1.6.6/go.mod h1:ZoP1geJldzCVY3Tonoz7b1IXk8rIX0Nltt5QE4OMNk0=
+github.com/containerd/containerd v1.6.18/go.mod h1:1RdCUu95+gc2v9t3IL+zIlpClSmew7/0YS8O5eQZrOw=
-github.com/containrrr/shoutrrr v0.5.2 h1:97P+wZDpN2gzBKLt4PDP1ZUTLz+k8AJVs40WOu9NNw8=
+github.com/containrrr/shoutrrr v0.6.0 h1:74cijCwvx+xVKd5jMH2uPO3hRW+pOiKwl0JyDp4m8gU=
-github.com/containrrr/shoutrrr v0.5.2/go.mod h1:XSU8tOIZ1JG8m6OuPozfGLpj6Ed+S8ZrRJaEodQhbzw=
+github.com/containrrr/shoutrrr v0.6.0/go.mod h1:ye9jGX5YzMnJ76waaNVWlJ4luhMEyt1EWU5unYTQSb0=
 github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
-github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
 github.com/coreos/etcd v3.3.13+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/cosiner/argv v0.1.0 h1:BVDiEL32lwHukgJKP87btEPenzrrHUjajs/8yzaqcXg=
 github.com/cosiner/argv v0.1.0/go.mod h1:EusR6TucWKX+zFgtdUsKT2Cvg45K5rtpCcWz4hK06d8=
-github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
+github.com/cpuguy83/go-md2man/v2 v2.0.1/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
 github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no=
-github.com/docker/distribution v2.7.1+incompatible h1:a5mlkVzth6W5A4fOsS3D2EO5BUmsJpcB+cRlLU7cSug=
+github.com/dnaeon/go-vcr v1.1.0 h1:ReYa/UBrRyQdant9B4fNHGoCNKw6qh6P0fsdGmZpR7c=
-github.com/docker/distribution v2.7.1+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
+github.com/docker/distribution v2.8.0+incompatible h1:l9EaZDICImO1ngI+uTifW+ZYvvz7fKISBAKpg+MbWbY=
+github.com/docker/distribution v2.8.0+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
 github.com/docker/docker v20.10.11+incompatible h1:OqzI/g/W54LczvhnccGqniFoQghHx3pklbLuhfXpqGo=
 github.com/docker/docker v20.10.11+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
 github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKohAFqRJQ=
@@ -58,42 +61,30 @@ github.com/docker/go-units v0.4.0 h1:3uh0PgVws3nIA0Q+MwDC8yjEPf9zjRfZZWXZYDct3Tw
 github.com/docker/go-units v0.4.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
 github.com/dustin/go-humanize v1.0.0 h1:VSnTsYCnlFHaM2/igO1h6X3HA71jcobQuxemgkq4zYo=
 github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
-github.com/edsrzf/mmap-go v1.0.0/go.mod h1:YO35OhQPt3KJa3ryjFM5Bs14WD66h8eGKpfaBNrHW5M=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
 github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
 github.com/envoyproxy/go-control-plane v0.10.2-0.20220325020618-49ff273808a1/go.mod h1:KJwIaB5Mv44NWtYuAOFCVOjcI94vtpEz2JU/D2v6IjE=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
-github.com/fatih/color v1.6.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
-github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
 github.com/fatih/color v1.10.0 h1:s36xzo75JdqLaaWoiEHk767eHiwo0598uUxyfiPkDsg=
 github.com/fatih/color v1.10.0/go.mod h1:ELkj/draVOlAH/xkhN6mQ50Qd0MPOk5AAr3maGEBuJM=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
 github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
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@@ -101,7 +92,6 @@ github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5y
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@@ -123,18 +113,13 @@ github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
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@@ -155,17 +140,13 @@ github.com/kelseyhightower/envconfig v1.4.0/go.mod h1:cccZRl6mQpaq41TPp5QxidR+Sa
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@@ -174,23 +155,13 @@ github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
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@@ -200,7 +171,6 @@ github.com/minio/minio-go/v7 v7.0.44 h1:9zUJ7iU7ax2P1jOvTp6nVrgzlZq3AZlFm0XfRFDK
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@@ -222,11 +192,9 @@ github.com/nxadm/tail v1.4.6 h1:11TGpSHY7Esh/i/qnq02Jo5oVrI1Gue8Slbq0ujPZFQ=
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@@ -244,6 +212,8 @@ github.com/otiai10/mint v1.3.3 h1:7JgpsBaN0uMkyju4tbYHu0mnM55hNKVYLsXmwr15NQI=
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@@ -266,9 +236,7 @@ github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6So
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-github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
-github.com/sirupsen/logrus v1.0.5/go.mod h1:pMByvHTf9Beacp5x1UXfOR9xyW/9antXMhjMPG0dEzc=
 github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
 github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
 github.com/sirupsen/logrus v1.7.0/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
@@ -282,13 +250,11 @@ github.com/spf13/afero v1.1.2/go.mod h1:j4pytiNVoe2o6bmDsKpLACNPDBIoEAkihy7loJ1B
 github.com/spf13/afero v1.2.2/go.mod h1:9ZxEEn6pIJ8Rxe320qSDBk6AsU0r9pR7Q4OcevTdifk=
 github.com/spf13/cast v1.3.0/go.mod h1:Qx5cxh0v+4UWYiBimWS+eyWzqEqokIECu5etghLkUJE=
 github.com/spf13/cast v1.3.1/go.mod h1:Qx5cxh0v+4UWYiBimWS+eyWzqEqokIECu5etghLkUJE=
-github.com/spf13/cobra v0.0.7/go.mod h1:/6GTrnGXV9HjY+aR4k0oJ5tcvakLuG6EuKReYlHNrgE=
+github.com/spf13/cobra v1.4.0/go.mod h1:Wo4iy3BUC+X2Fybo0PDqwJIv3dNRiZLHQymsfxlB84g=
 github.com/spf13/jwalterweatherman v1.0.0/go.mod h1:cQK4TGJAtQXfYWX+Ddv3mKDzgVb68N+wFjFa4jdeBTo=
 github.com/spf13/jwalterweatherman v1.1.0/go.mod h1:aNWZUN0dPAAO/Ljvb5BEdw96iTZ0EXowPYD95IqWIGo=
-github.com/spf13/pflag v1.0.1/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
 github.com/spf13/pflag v1.0.3/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
-github.com/spf13/viper v1.4.0/go.mod h1:PTJ7Z/lr49W6bUbkmS1V3by4uWynFiR9p7+dSq/yZzE=
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 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
@@ -296,27 +262,21 @@ github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXf
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
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-github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.7.1 h1:5TQK59W5E3v0r2duFAb7P95B6hEeOyEnHRa8MjYSMTY=
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 github.com/studio-b12/gowebdav v0.0.0-20220128162035-c7b1ff8a5e62/go.mod h1:bHA7t77X/QFExdeAnDzK6vKM34kEZAcE1OX4MfiwjkE=
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 github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
-github.com/twitchyliquid64/golang-asm v0.0.0-20190126203739-365674df15fc/go.mod h1:NoCfSFWosfqMqmmD7hApkirIK9ozpHjxRnRxs1l413A=
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-github.com/ugorji/go v1.1.7/go.mod h1:kZn38zHttfInRq0xu/PH0az30d+z6vm202qpg1oXVMw=
-github.com/ugorji/go/codec v1.1.7/go.mod h1:Ax+UKWsSmolVDwsd+7N3ZtXu+yMGCf907BLYF3GoBXY=
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-go.coder.com/go-tools v0.0.0-20190317003359-0c6a35b74a16/go.mod h1:iKV5yK9t+J5nG9O3uF6KYdPEz3dyfMyB15MN1rbQ8Qw=
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 go.uber.org/zap v1.10.0/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
-golang.org/x/crypto v0.0.0-20180426230345-b49d69b5da94/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
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 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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@@ -328,13 +288,11 @@ golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
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-golang.org/x/lint v0.0.0-20190909230951-414d861bb4ac/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
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 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20181102091132-c10e9556a7bc/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
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@@ -350,8 +308,8 @@ golang.org/x/net v0.0.0-20201006153459-a7d1128ccaa0/go.mod h1:sp8m0HH+o8qH0wwXwY
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
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 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/net v0.2.0 h1:sZfSu1wtKLGlWI4ZZayP0ck9Y73K1ynO6gqzTdBVdPU=
+golang.org/x/net v0.7.0 h1:rJrUqqhjsgNp7KqAIc25s9pZnjU7TUcSY7HcVZjdn1g=
-golang.org/x/net v0.2.0/go.mod h1:KqCZLdyyvdV855qA2rE3GC2aiw5xGR5TEjj8smXukLY=
+golang.org/x/net v0.7.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
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@@ -368,15 +326,9 @@ golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5h
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@@ -397,19 +349,18 @@ golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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-golang.org/x/sys v0.2.0 h1:ljd4t30dBnAvMZaQCevtY0xLLD0A+bRZXbgLMLU1F/A=
+golang.org/x/sys v0.5.0 h1:MUK/U/4lj1t1oPg0HfuXDN/Z1wv31ZJ/YcPiGccS4DU=
-golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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-golang.org/x/term v0.2.0 h1:z85xZCsEl7bi/KwbNADeBYoOP0++7W1ipu+aGnpwzRM=
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-golang.org/x/text v0.4.0 h1:BrVqGRd7+k1DiOgtnFvAkoQEWQvBc25ouMJM6429SFg=
+golang.org/x/text v0.7.0 h1:4BRB4x83lYWy72KwLD/qYDuTu7q9PjSagHvijDw7cLo=
-golang.org/x/text v0.4.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
-golang.org/x/time v0.0.0-20191024005414-555d28b269f0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20210723032227-1f47c861a9ac h1:7zkz7BUtwNFFqcowJ+RIgu2MaV/MapERkDIy+mwPyjs=
 golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
@@ -419,7 +370,6 @@ golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3
 golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20190624222133-a101b041ded4/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
-golang.org/x/tools v0.0.0-20190920225731-5eefd052ad72/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
@@ -460,14 +410,12 @@ google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQ
 google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 google.golang.org/protobuf v1.28.0 h1:w43yiav+6bVFTBQFZX0r7ipe9JQ1QsbMgHwbBziscLw=
 google.golang.org/protobuf v1.28.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
-gopkg.in/airbrake/gobrake.v2 v2.0.9/go.mod h1:/h5ZAUhDkGaJfjzjKLSjv6zCL6O0LLBxU4K+aSYdM/U=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f h1:BLraFXnmrev5lT+xlilqcH8XK9/i0At2xKjWk4p6zsU=
 gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
-gopkg.in/gemnasium/logrus-airbrake-hook.v2 v2.1.2/go.mod h1:Xk6kEKp8OKb+X14hQBKWaSkCsqBpgog8nAV2xsGOxlo=
 gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/ini.v1 v1.55.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/ini.v1 v1.67.0 h1:Dgnx+6+nfE+IfzjUEISNeydPJh9AXNNsWbGP9KzCsOA=
@@ -485,16 +433,10 @@ gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gosrc.io/xmpp v0.5.1/go.mod h1:L3NFMqYOxyLz3JGmgFyWf7r9htE91zVGiK40oW4RwdY=
-gotest.tools v2.1.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
 gotest.tools v2.2.0+incompatible h1:VsBPFP1AI068pPrMxtb/S8Zkgf9xEmTLJjfM+P5UIEo=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
-gotest.tools/gotestsum v0.3.5/go.mod h1:Mnf3e5FUzXbkCfynWBGOwLssY7gTQgCHObK9tMpAriY=
 gotest.tools/v3 v3.0.2/go.mod h1:3SzNCllyD9/Y+b5r9JIKQ474KzkZyqLqEfYqMsX94Bk=
 gotest.tools/v3 v3.0.3 h1:4AuOwCGf4lLR9u3YOe2awrHygurzhO/HeQ6laiA6Sx0=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-mvdan.cc/sh v2.6.4+incompatible/go.mod h1:IeeQbZq+x2SUGBensq/jge5lLQbS3XT2ktyp3wrt4x8=
-nhooyr.io/websocket v1.6.5/go.mod h1:F259lAzPRAH0htX2y3ehpJe09ih1aSHN7udWki1defY=
-nhooyr.io/websocket v1.8.6/go.mod h1:B70DZP8IakI65RVQ51MsWP/8jndNma26DVA/nFSCgW0=

internal/storage/azure/azure.go

@@ -0,0 +1,160 @@
+// Copyright 2022 - Offen Authors <hioffen@posteo.de>
+// SPDX-License-Identifier: MPL-2.0
+
+package azure
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+	"text/template"
+	"time"
+
+	"github.com/Azure/azure-sdk-for-go/sdk/azidentity"
+	"github.com/Azure/azure-sdk-for-go/sdk/storage/azblob"
+	"github.com/Azure/azure-sdk-for-go/sdk/storage/azblob/container"
+	"github.com/offen/docker-volume-backup/internal/storage"
+)
+
+type azureBlobStorage struct {
+	*storage.StorageBackend
+	client        *azblob.Client
+	containerName string
+}
+
+// Config contains values that define the configuration of an Azure Blob Storage.
+type Config struct {
+	AccountName       string
+	ContainerName     string
+	PrimaryAccountKey string
+	Endpoint          string
+	RemotePath        string
+}
+
+// NewStorageBackend creates and initializes a new Azure Blob Storage backend.
+func NewStorageBackend(opts Config, logFunc storage.Log) (storage.Backend, error) {
+	endpointTemplate, err := template.New("endpoint").Parse(opts.Endpoint)
+	if err != nil {
+		return nil, fmt.Errorf("NewStorageBackend: error parsing endpoint template: %w", err)
+	}
+	var ep bytes.Buffer
+	if err := endpointTemplate.Execute(&ep, opts); err != nil {
+		return nil, fmt.Errorf("NewStorageBackend: error executing endpoint template: %w", err)
+	}
+	normalizedEndpoint := fmt.Sprintf("%s/", strings.TrimSuffix(ep.String(), "/"))
+
+	var client *azblob.Client
+	if opts.PrimaryAccountKey != "" {
+		cred, err := azblob.NewSharedKeyCredential(opts.AccountName, opts.PrimaryAccountKey)
+		if err != nil {
+			return nil, fmt.Errorf("NewStorageBackend: error creating shared key Azure credential: %w", err)
+		}
+
+		client, err = azblob.NewClientWithSharedKeyCredential(normalizedEndpoint, cred, nil)
+		if err != nil {
+			return nil, fmt.Errorf("NewStorageBackend: error creating Azure client: %w", err)
+		}
+	} else {
+		cred, err := azidentity.NewManagedIdentityCredential(nil)
+		if err != nil {
+			return nil, fmt.Errorf("NewStorageBackend: error creating managed identity credential: %w", err)
+		}
+		client, err = azblob.NewClient(normalizedEndpoint, cred, nil)
+		if err != nil {
+			return nil, fmt.Errorf("NewStorageBackend: error creating Azure client: %w", err)
+		}
+	}
+
+	storage := azureBlobStorage{
+		client:        client,
+		containerName: opts.ContainerName,
+		StorageBackend: &storage.StorageBackend{
+			DestinationPath: opts.RemotePath,
+			Log:             logFunc,
+		},
+	}
+	return &storage, nil
+}
+
+// Name returns the name of the storage backend
+func (b *azureBlobStorage) Name() string {
+	return "Azure"
+}
+
+// Copy copies the given file to the storage backend.
+func (b *azureBlobStorage) Copy(file string) error {
+	fileReader, err := os.Open(file)
+	if err != nil {
+		return fmt.Errorf("(*azureBlobStorage).Copy: error opening file %s: %w", file, err)
+	}
+	_, err = b.client.UploadStream(
+		context.Background(),
+		b.containerName,
+		filepath.Join(b.DestinationPath, filepath.Base(file)),
+		fileReader,
+		nil,
+	)
+	if err != nil {
+		return fmt.Errorf("(*azureBlobStorage).Copy: error uploading file %s: %w", file, err)
+	}
+	return nil
+}
+
+// Prune rotates away backups according to the configuration and provided
+// deadline for the Azure Blob storage backend.
+func (b *azureBlobStorage) Prune(deadline time.Time, pruningPrefix string) (*storage.PruneStats, error) {
+	lookupPrefix := filepath.Join(b.DestinationPath, pruningPrefix)
+	pager := b.client.NewListBlobsFlatPager(b.containerName, &container.ListBlobsFlatOptions{
+		Prefix: &lookupPrefix,
+	})
+	var matches []string
+	var totalCount uint
+	for pager.More() {
+		resp, err := pager.NextPage(context.Background())
+		if err != nil {
+			return nil, fmt.Errorf("(*azureBlobStorage).Prune: error paging over blobs: %w", err)
+		}
+		for _, v := range resp.Segment.BlobItems {
+			totalCount++
+			if v.Properties.LastModified.Before(deadline) {
+				matches = append(matches, *v.Name)
+			}
+		}
+	}
+
+	stats := storage.PruneStats{
+		Total:  totalCount,
+		Pruned: uint(len(matches)),
+	}
+
+	if err := b.DoPrune(b.Name(), len(matches), int(totalCount), "Azure Blob Storage backup(s)", func() error {
+		wg := sync.WaitGroup{}
+		wg.Add(len(matches))
+		var errs []error
+
+		for _, match := range matches {
+			name := match
+			go func() {
+				_, err := b.client.DeleteBlob(context.Background(), b.containerName, name, nil)
+				if err != nil {
+					errs = append(errs, err)
+				}
+				wg.Done()
+			}()
+		}
+		wg.Wait()
+		if len(errs) != 0 {
+			return errors.Join(errs...)
+		}
+		return nil
+	}); err != nil {
+		return &stats, err
+	}
+
+	return &stats, nil
+}

internal/storage/local/local.go

@@ -4,6 +4,7 @@
 package local
 
 import (
+	"errors"
 	"fmt"
 	"io"
 	"os"
@@ -12,7 +13,6 @@ import (
 	"time"
 
 	"github.com/offen/docker-volume-backup/internal/storage"
-	"github.com/offen/docker-volume-backup/internal/utilities"
 )
 
 type localStorage struct {
@@ -127,7 +127,7 @@ func (b *localStorage) Prune(deadline time.Time, pruningPrefix string) (*storage
 			return fmt.Errorf(
 				"(*localStorage).Prune: %d error(s) deleting local files, starting with: %w",
 				len(removeErrors),
-				utilities.Join(removeErrors...),
+				errors.Join(removeErrors...),
 			)
 		}
 		return nil

internal/storage/s3/s3.go

@@ -15,7 +15,6 @@ import (
 	"github.com/minio/minio-go/v7"
 	"github.com/minio/minio-go/v7/pkg/credentials"
 	"github.com/offen/docker-volume-backup/internal/storage"
-	"github.com/offen/docker-volume-backup/internal/utilities"
 )
 
 type s3Storage struct {
@@ -159,7 +158,7 @@ func (b *s3Storage) Prune(deadline time.Time, pruningPrefix string) (*storage.Pr
 			}
 		}
 		if len(removeErrors) != 0 {
-			return utilities.Join(removeErrors...)
+			return errors.Join(removeErrors...)
 		}
 		return nil
 	}); err != nil {

internal/storage/storage.go

@@ -29,7 +29,7 @@ const (
 	LogLevelError
 )
 
-type Log func(logType LogLevel, context string, msg string, params ...interface{})
+type Log func(logType LogLevel, context string, msg string, params ...any)
 
 // PruneStats is a wrapper struct for returning stats after pruning
 type PruneStats struct {

internal/storage/webdav/webdav.go

@@ -67,15 +67,17 @@ func (b *webDavStorage) Name() string {
 
 // Copy copies the given file to the WebDav storage backend.
 func (b *webDavStorage) Copy(file string) error {
-	bytes, err := os.ReadFile(file)
 	_, name := path.Split(file)
-	if err != nil {
-		return fmt.Errorf("(*webDavStorage).Copy: Error reading the file to be uploaded: %w", err)
-	}
 	if err := b.client.MkdirAll(b.DestinationPath, 0644); err != nil {
 		return fmt.Errorf("(*webDavStorage).Copy: Error creating directory '%s' on WebDAV server: %w", b.DestinationPath, err)
 	}
-	if err := b.client.Write(filepath.Join(b.DestinationPath, name), bytes, 0644); err != nil {
+
+	r, err := os.Open(file)
+	if err != nil {
+		return fmt.Errorf("(*webDavStorage).Copy: Error opening the file to be uploaded: %w", err)
+	}
+
+	if err := b.client.WriteStream(filepath.Join(b.DestinationPath, name), r, 0644); err != nil {
 		return fmt.Errorf("(*webDavStorage).Copy: Error uploading the file to WebDAV server: %w", err)
 	}
 	b.Log(storage.LogLevelInfo, b.Name(), "Uploaded a copy of backup '%s' to WebDAV URL '%s' at path '%s'.", file, b.url, b.DestinationPath)

internal/utilities/util.go

@@ -1,24 +0,0 @@
-// Copyright 2022 - Offen Authors <hioffen@posteo.de>
-// SPDX-License-Identifier: MPL-2.0
-
-package utilities
-
-import (
-	"errors"
-	"strings"
-)
-
-// Join takes a list of errors and joins them into a single error
-func Join(errs ...error) error {
-	if len(errs) == 1 {
-		return errs[0]
-	}
-	var msgs []string
-	for _, err := range errs {
-		if err == nil {
-			continue
-		}
-		msgs = append(msgs, err.Error())
-	}
-	return errors.New("[" + strings.Join(msgs, ", ") + "]")
-}

test/azure/docker-compose.yml

@@ -0,0 +1,58 @@
+version: '3'
+
+services:
+  storage:
+    image: mcr.microsoft.com/azure-storage/azurite
+    volumes:
+      - azurite_backup_data:/data
+    command: azurite-blob --blobHost 0.0.0.0 --blobPort 10000 --location /data
+    healthcheck:
+        test: nc 127.0.0.1 10000 -z
+        interval: 1s
+        retries: 30
+
+  az_cli:
+    image: mcr.microsoft.com/azure-cli
+    volumes:
+      - ./local:/dump
+    command:
+      - /bin/sh
+      - -c
+      - |
+          az storage container create --name test-container
+    depends_on:
+      storage:
+        condition: service_healthy
+    environment:
+      AZURE_STORAGE_CONNECTION_STRING: DefaultEndpointsProtocol=http;AccountName=devstoreaccount1;AccountKey=Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw==;BlobEndpoint=http://storage:10000/devstoreaccount1;
+
+  backup:
+    image: offen/docker-volume-backup:${TEST_VERSION:-canary}
+    hostname: hostnametoken
+    restart: always
+    environment:
+      AZURE_STORAGE_ACCOUNT_NAME: devstoreaccount1
+      AZURE_STORAGE_PRIMARY_ACCOUNT_KEY: Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw==
+      AZURE_STORAGE_CONTAINER_NAME: test-container
+      AZURE_STORAGE_ENDPOINT: http://storage:10000/{{ .AccountName }}/
+      AZURE_STORAGE_PATH: 'path/to/backup'
+      BACKUP_FILENAME: test.tar.gz
+      BACKUP_CRON_EXPRESSION: 0 0 5 31 2 ?
+      BACKUP_RETENTION_DAYS: ${BACKUP_RETENTION_DAYS:-7}
+      BACKUP_PRUNING_LEEWAY: 5s
+      BACKUP_PRUNING_PREFIX: test
+    volumes:
+      - app_data:/backup/app_data:ro
+      - /var/run/docker.sock:/var/run/docker.sock
+
+  offen:
+    image: offen/offen:latest
+    labels:
+      - docker-volume-backup.stop-during-backup=true
+    volumes:
+      - app_data:/var/opt/offen
+
+volumes:
+  azurite_backup_data:
+    name: azurite_backup_data
+  app_data:

test/azure/run.sh

@@ -0,0 +1,40 @@
+#!/bin/sh
+
+set -e
+
+cd "$(dirname "$0")"
+. ../util.sh
+current_test=$(basename $(pwd))
+
+docker compose up -d
+sleep 5
+
+# A symlink for a known file in the volume is created so the test can check
+# whether symlinks are preserved on backup.
+docker compose exec backup backup
+
+sleep 5
+
+expect_running_containers "3"
+
+docker-compose run --rm az_cli \
+  az storage blob download -f /dump/test.tar.gz -c test-container -n path/to/backup/test.tar.gz
+tar -xvf ./local/test.tar.gz -C /tmp && test -f /tmp/backup/app_data/offen.db
+
+pass "Found relevant files in untared remote backups."
+
+# The second part of this test checks if backups get deleted when the retention
+# is set to 0 days (which it should not as it would mean all backups get deleted)
+# TODO: find out if we can test actual deletion without having to wait for a day
+BACKUP_RETENTION_DAYS="0" docker-compose up -d
+sleep 5
+
+docker compose exec backup backup
+
+docker compose run --rm az_cli \
+  az storage blob download -f /dump/test.tar.gz -c test-container -n path/to/backup/test.tar.gz
+test -f ./local/test.tar.gz
+
+pass "Remote backups have not been deleted."
+
+docker compose down --volumes

test/certs/run.sh

@@ -24,20 +24,20 @@ openssl x509 -req -passin pass:test \
 
 openssl x509 -in minio.crt -noout -text
 
-docker-compose up -d
+docker compose up -d
 sleep 5
 
-docker-compose exec backup backup
+docker compose exec backup backup
 
 sleep 5
 
 expect_running_containers "3"
 
-docker run --rm -it \
+docker run --rm \
   -v minio_backup_data:/minio_data \
   alpine \
   ash -c 'tar -xvf /minio_data/backup/test.tar.gz -C /tmp && test -f /tmp/backup/app_data/offen.db'
 
 pass "Found relevant files in untared remote backups."
 
-docker-compose down --volumes
+docker compose down --volumes

test/cli/run.sh

@@ -48,7 +48,7 @@ docker run --rm \
   --entrypoint backup \
   offen/docker-volume-backup:${TEST_VERSION:-canary}
 
-docker run --rm -it \
+docker run --rm \
   -v backup_data:/data alpine \
   ash -c 'tar -xvf /data/backup/test.tar.gz && test -f /backup/app_data/offen.db && test -d /backup/empty_data'
 

test/commands/run.sh

@@ -6,10 +6,10 @@ cd $(dirname $0)
 . ../util.sh
 current_test=$(basename $(pwd))
 
-docker-compose up -d
+docker compose up -d
 sleep 30 # mariadb likes to take a bit before responding
 
-docker-compose exec backup backup
+docker compose exec backup backup
 sudo cp -r $(docker volume inspect --format='{{ .Mountpoint }}' commands_archive) ./local
 
 tar -xvf ./local/test.tar.gz
@@ -28,7 +28,7 @@ if [ -f ./backup/data/post.txt ]; then
 fi
 pass "Did not find unexpected file."
 
-docker-compose down --volumes
+docker compose down --volumes
 sudo rm -rf ./local
 
 

test/confd/run.sh

@@ -8,12 +8,12 @@ current_test=$(basename $(pwd))
 
 mkdir -p local
 
-docker-compose up -d
+docker compose up -d
 
 # sleep until a backup is guaranteed to have happened on the 1 minute schedule
 sleep 100
 
-docker-compose down --volumes
+docker compose down --volumes
 
 if [ ! -f ./local/conf.tar.gz ]; then
   fail "Config from file was not used."

test/extend/run.sh

@@ -8,14 +8,15 @@ current_test=$(basename $(pwd))
 
 mkdir -p local
 
+export BASE_VERSION="${TEST_VERSION:-canary}"
 export TEST_VERSION="${TEST_VERSION:-canary}-with-rsync"
 
-docker build . -t offen/docker-volume-backup:$TEST_VERSION
+docker build . -t offen/docker-volume-backup:$TEST_VERSION --build-arg version=$BASE_VERSION
 
-docker-compose up -d
+docker compose up -d
 sleep 5
 
-docker-compose exec backup backup
+docker compose exec backup backup
 
 sleep 5
 
@@ -25,4 +26,4 @@ if [ ! -f "./local/app_data/offen.db" ]; then
   fail "Could not find expected file in untared archive."
 fi
 
-docker-compose down --volumes
+docker compose down --volumes

test/gpg/run.sh

@@ -8,10 +8,10 @@ current_test=$(basename $(pwd))
 
 mkdir -p local
 
-docker-compose up -d
+docker compose up -d
 sleep 5
 
-docker-compose exec backup backup
+docker compose exec backup backup
 
 expect_running_containers "2"
 
@@ -30,4 +30,4 @@ if [ ! -L ./local/test-latest.tar.gz.gpg ]; then
   fail "Could not find local symlink to latest encrypted backup."
 fi
 
-docker-compose down --volumes
+docker compose down --volumes

test/ignore/run.sh

@@ -8,11 +8,11 @@ current_test=$(basename $(pwd))
 
 mkdir -p local
 
-docker-compose up -d
+docker compose up -d
 sleep 5
-docker-compose exec backup backup
+docker compose exec backup backup
 
-docker-compose down --volumes
+docker compose down --volumes
 
 out=$(mktemp -d)
 sudo tar --same-owner -xvf ./local/test.tar.gz -C "$out"

test/local/run.sh

@@ -8,13 +8,13 @@ current_test=$(basename $(pwd))
 
 mkdir -p local
 
-docker-compose up -d
+docker compose up -d
 sleep 5
 
 # A symlink for a known file in the volume is created so the test can check
 # whether symlinks are preserved on backup.
-docker-compose exec offen ln -s /var/opt/offen/offen.db /var/opt/offen/db.link
+docker compose exec offen ln -s /var/opt/offen/offen.db /var/opt/offen/db.link
-docker-compose exec backup backup
+docker compose exec backup backup
 
 sleep 5
 
@@ -42,14 +42,14 @@ pass "Found symlink to latest version in local backup."
 # The second part of this test checks if backups get deleted when the retention
 # is set to 0 days (which it should not as it would mean all backups get deleted)
 # TODO: find out if we can test actual deletion without having to wait for a day
-BACKUP_RETENTION_DAYS="0" docker-compose up -d
+BACKUP_RETENTION_DAYS="0" docker compose up -d
 sleep 5
 
-docker-compose exec backup backup
+docker compose exec backup backup
 
 if [ "$(find ./local -type f | wc -l)" != "1" ]; then
   fail "Backups should not have been deleted, instead seen: "$(find ./local -type f)""
 fi
 pass "Local backups have not been deleted."
 
-docker-compose down --volumes
+docker compose down --volumes

test/notifications/run.sh

@@ -8,13 +8,13 @@ current_test=$(basename $(pwd))
 
 mkdir -p local
 
-docker-compose up -d
+docker compose up -d
 sleep 5
 
 GOTIFY_TOKEN=$(curl -sSLX POST -H 'Content-Type: application/json' -d '{"name":"test"}' http://admin:custom@localhost:8080/application | jq -r '.token')
 info "Set up Gotify application using token $GOTIFY_TOKEN"
 
-docker-compose exec backup backup
+docker compose exec backup backup
 
 NUM_MESSAGES=$(curl -sSL http://admin:custom@localhost:8080/message | jq -r '.messages | length')
 if [ "$NUM_MESSAGES" != 0 ]; then
@@ -22,11 +22,11 @@ if [ "$NUM_MESSAGES" != 0 ]; then
 fi
 pass "No notifications were sent when not configured."
 
-docker-compose down
+docker compose down
 
-NOTIFICATION_URLS="gotify://gotify/${GOTIFY_TOKEN}?disableTLS=true" docker-compose up -d
+NOTIFICATION_URLS="gotify://gotify/${GOTIFY_TOKEN}?disableTLS=true" docker compose up -d
 
-docker-compose exec backup backup
+docker compose exec backup backup
 
 NUM_MESSAGES=$(curl -sSL http://admin:custom@localhost:8080/message | jq -r '.messages | length')
 if [ "$NUM_MESSAGES" != 1 ]; then
@@ -47,4 +47,4 @@ if [ "$MESSAGE_BODY" != "Backing up /tmp/test.tar.gz succeeded." ]; then
 fi
 pass "Custom notification body was used."
 
-docker-compose down --volumes
+docker compose down --volumes

test/ownership/run.sh

@@ -9,10 +9,10 @@ current_test=$(basename $(pwd))
 
 mkdir -p local
 
-docker-compose up -d
+docker compose up -d
 sleep 5
 
-docker-compose exec backup backup
+docker compose exec backup backup
 
 tmp_dir=$(mktemp -d)
 sudo tar --same-owner -xvf ./local/backup.tar.gz -C $tmp_dir
@@ -27,4 +27,4 @@ for file in $(sudo find $tmp_dir/backup/postgres); do
 done
 pass "All files and directories in backup preserved their ownership."
 
-docker-compose down --volumes
+docker compose down --volumes

test/s3/run.sh

@@ -6,18 +6,18 @@ cd "$(dirname "$0")"
 . ../util.sh
 current_test=$(basename $(pwd))
 
-docker-compose up -d
+docker compose up -d
 sleep 5
 
 # A symlink for a known file in the volume is created so the test can check
 # whether symlinks are preserved on backup.
-docker-compose exec backup backup
+docker compose exec backup backup
 
 sleep 5
 
 expect_running_containers "3"
 
-docker run --rm -it \
+docker run --rm \
   -v minio_backup_data:/minio_data \
   alpine \
   ash -c 'tar -xvf /minio_data/backup/test-hostnametoken.tar.gz -C /tmp && test -f /tmp/backup/app_data/offen.db'
@@ -27,16 +27,16 @@ pass "Found relevant files in untared remote backups."
 # The second part of this test checks if backups get deleted when the retention
 # is set to 0 days (which it should not as it would mean all backups get deleted)
 # TODO: find out if we can test actual deletion without having to wait for a day
-BACKUP_RETENTION_DAYS="0" docker-compose up -d
+BACKUP_RETENTION_DAYS="0" docker compose up -d
 sleep 5
 
-docker-compose exec backup backup
+docker compose exec backup backup
 
-docker run --rm -it \
+docker run --rm \
   -v minio_backup_data:/minio_data \
   alpine \
   ash -c '[ $(find /minio_data/backup/ -type f | wc -l) = "1" ]'
 
 pass "Remote backups have not been deleted."
 
-docker-compose down --volumes
+docker compose down --volumes

test/secrets/run.sh

@@ -22,7 +22,7 @@ sleep 20
 
 docker exec $(docker ps -q -f name=backup) backup
 
-docker run --rm -it \
+docker run --rm \
   -v backup_data:/data alpine \
   ash -c 'tar -xf /data/backup/test.tar.gz && test -f /backup/pg_data/PG_VERSION'
 

test/ssh/run.sh

@@ -8,16 +8,16 @@ current_test=$(basename $(pwd))
 
 ssh-keygen -t rsa -m pem -b 4096 -N "test1234" -f id_rsa -C "docker-volume-backup@local"
 
-docker-compose up -d
+docker compose up -d
 sleep 5
 
-docker-compose exec backup backup
+docker compose exec backup backup
 
 sleep 5
 
 expect_running_containers 3
 
-docker run --rm -it \
+docker run --rm \
   -v ssh_backup_data:/ssh_data \
   alpine \
   ash -c 'tar -xvf /ssh_data/test-hostnametoken.tar.gz -C /tmp && test -f /tmp/backup/app_data/offen.db'
@@ -27,17 +27,17 @@ pass "Found relevant files in decrypted and untared remote backups."
 # The second part of this test checks if backups get deleted when the retention
 # is set to 0 days (which it should not as it would mean all backups get deleted)
 # TODO: find out if we can test actual deletion without having to wait for a day
-BACKUP_RETENTION_DAYS="0" docker-compose up -d
+BACKUP_RETENTION_DAYS="0" docker compose up -d
 sleep 5
 
-docker-compose exec backup backup
+docker compose exec backup backup
 
-docker run --rm -it \
+docker run --rm \
   -v ssh_backup_data:/ssh_data \
   alpine \
   ash -c '[ $(find /ssh_data/ -type f | wc -l) = "1" ]'
 
 pass "Remote backups have not been deleted."
 
-docker-compose down --volumes
+docker compose down --volumes
 rm -f id_rsa id_rsa.pub

test/swarm/run.sh

@@ -19,7 +19,7 @@ sleep 20
 
 docker exec $(docker ps -q -f name=backup) backup
 
-docker run --rm -it \
+docker run --rm \
   -v backup_data:/data alpine \
   ash -c 'tar -xf /data/backup/test.tar.gz && test -f /backup/pg_data/PG_VERSION'
 

test/user/.gitignore

@@ -0,0 +1,2 @@
+local
+backup

test/user/docker-compose.yml

@@ -0,0 +1,30 @@
+version: '2.4'
+
+services:
+  alpine:
+    image: alpine:3.17.3
+    tty: true 
+    volumes:
+      - app_data:/tmp
+    labels:
+      - docker-volume-backup.archive-pre.user=testuser
+      - docker-volume-backup.archive-pre=/bin/sh -c 'whoami > /tmp/whoami.txt'
+
+
+  backup:
+    image: offen/docker-volume-backup:${TEST_VERSION:-canary}
+    deploy:
+      restart_policy:
+        condition: on-failure
+    environment:
+      BACKUP_FILENAME: test.tar.gz
+      BACKUP_CRON_EXPRESSION: 0 0 5 31 2 ?
+      EXEC_FORWARD_OUTPUT: "true"
+    volumes:
+      - ./local:/archive
+      - app_data:/backup/data:ro
+      - /var/run/docker.sock:/var/run/docker.sock
+
+volumes:
+  app_data:
+  archive:

test/user/run.sh

@@ -0,0 +1,30 @@
+#!/bin/sh
+
+set -e
+
+cd $(dirname $0)
+. ../util.sh
+current_test=$(basename $(pwd))
+
+docker compose up -d
+
+user_name=testuser
+docker exec user-alpine-1 adduser --disabled-password "$user_name"
+
+docker compose exec backup backup
+
+tar -xvf ./local/test.tar.gz
+if [ ! -f ./backup/data/whoami.txt ]; then
+  fail "Could not find file written by pre command."
+fi
+pass "Found expected file."
+
+tar -xvf ./local/test.tar.gz
+if [ "$(cat ./backup/data/whoami.txt)" != "$user_name" ]; then
+  fail "Could not find expected user name."
+fi
+pass "Found expected user."
+
+docker compose down --volumes
+sudo rm -rf ./local
+

test/webdav/run.sh

@@ -6,16 +6,16 @@ cd "$(dirname "$0")"
 . ../util.sh
 current_test=$(basename $(pwd))
 
-docker-compose up -d
+docker compose up -d
 sleep 5
 
-docker-compose exec backup backup
+docker compose exec backup backup
 
 sleep 5
 
 expect_running_containers "3"
 
-docker run --rm -it \
+docker run --rm \
   -v webdav_backup_data:/webdav_data \
   alpine \
   ash -c 'tar -xvf /webdav_data/data/my/new/path/test-hostnametoken.tar.gz -C /tmp && test -f /tmp/backup/app_data/offen.db'
@@ -25,16 +25,16 @@ pass "Found relevant files in untared remote backup."
 # The second part of this test checks if backups get deleted when the retention
 # is set to 0 days (which it should not as it would mean all backups get deleted)
 # TODO: find out if we can test actual deletion without having to wait for a day
-BACKUP_RETENTION_DAYS="0" docker-compose up -d
+BACKUP_RETENTION_DAYS="0" docker compose up -d
 sleep 5
 
-docker-compose exec backup backup
+docker compose exec backup backup
 
-docker run --rm -it \
+docker run --rm \
   -v webdav_backup_data:/webdav_data \
   alpine \
   ash -c '[ $(find /webdav_data/data/my/new/path/ -type f | wc -l) = "1" ]'
 
 pass "Remote backups have not been deleted."
 
-docker-compose down --volumes
+docker compose down --volumes