SSH Backup Storage Support (#107)

* SSH Client implemented

* Private key auth implemented
Code refactoring

* Refactoring

* Passphrase renamed to IdentityPassphrase
Default private key location changed to .ssh/id

test/compose/docker-compose.yml

@@ -21,12 +21,24 @@ services:
     volumes:
       - webdav_backup_data:/var/lib/dav
 
+  ssh:
+    image: linuxserver/openssh-server:version-8.6_p1-r3
+    environment:
+      - PUID=1000
+      - PGID=1000
+      - USER_NAME=test
+    volumes:
+      - ./id_rsa.pub:/config/.ssh/authorized_keys
+      - ssh_backup_data:/tmp
+      - ssh_config:/config
+
   backup:
     image: offen/docker-volume-backup:${TEST_VERSION:-canary}
     hostname: hostnametoken
     depends_on:
       - minio
       - webdav
+      - ssh
     restart: always
     environment:
       AWS_ACCESS_KEY_ID: test
@@ -47,8 +59,14 @@ services:
       WEBDAV_PATH: /my/new/path/
       WEBDAV_USERNAME: test
       WEBDAV_PASSWORD: test
+      SSH_HOST_NAME: ssh
+      SSH_PORT: 2222
+      SSH_USER: test
+      SSH_REMOTE_PATH: /tmp
+      SSH_IDENTITY_PASSPHRASE: test1234
     volumes:
       - ./local:/archive
+      - ./id_rsa:/root/.ssh/id
       - app_data:/backup/app_data:ro
       - /var/run/docker.sock:/var/run/docker.sock
 
@@ -62,4 +80,6 @@ services:
 volumes:
   minio_backup_data:
   webdav_backup_data:
+  ssh_backup_data:
+  ssh_config:
   app_data:

test/compose/run.sh

@@ -2,9 +2,10 @@
 
 set -e
 
-cd $(dirname $0)
+cd "$(dirname "$0")"
 
 mkdir -p local
+ssh-keygen -t rsa -m pem -b 4096 -N "test1234" -f id_rsa -C "docker-volume-backup@local"
 
 docker-compose up -d
 sleep 5
@@ -15,7 +16,7 @@ docker-compose exec offen ln -s /var/opt/offen/offen.db /var/opt/offen/db.link
 docker-compose exec backup backup
 
 sleep 5
-if [ "$(docker-compose ps -q | wc -l)" != "4" ]; then
+if [ "$(docker-compose ps -q | wc -l)" != "5" ]; then
   echo "[TEST:FAIL] Expected all containers to be running post backup, instead seen:"
   docker-compose ps
   exit 1
@@ -25,10 +26,12 @@ echo "[TEST:PASS] All containers running post backup."
 
 docker run --rm -it \
   -v compose_minio_backup_data:/minio_data \
-  -v compose_webdav_backup_data:/webdav_data alpine \
+  -v compose_webdav_backup_data:/webdav_data \
+  -v compose_ssh_backup_data:/ssh_data alpine \
   ash -c 'apk add gnupg && \
           echo 1234secret | gpg -d --pinentry-mode loopback --passphrase-fd 0 --yes /minio_data/backup/test-hostnametoken.tar.gz.gpg > /tmp/test-hostnametoken.tar.gz && tar -xvf /tmp/test-hostnametoken.tar.gz -C /tmp && test -f /tmp/backup/app_data/offen.db && \
-          echo 1234secret | gpg -d --pinentry-mode loopback --passphrase-fd 0 --yes /webdav_data/data/my/new/path/test-hostnametoken.tar.gz.gpg > /tmp/test-hostnametoken.tar.gz && tar -xvf /tmp/test-hostnametoken.tar.gz -C /tmp && test -f /tmp/backup/app_data/offen.db'
+          echo 1234secret | gpg -d --pinentry-mode loopback --passphrase-fd 0 --yes /webdav_data/data/my/new/path/test-hostnametoken.tar.gz.gpg > /tmp/test-hostnametoken.tar.gz && tar -xvf /tmp/test-hostnametoken.tar.gz -C /tmp && test -f /tmp/backup/app_data/offen.db && \
+          echo 1234secret | gpg -d --pinentry-mode loopback --passphrase-fd 0 --yes /ssh_data/test-hostnametoken.tar.gz.gpg > /tmp/test-hostnametoken.tar.gz && tar -xvf /tmp/test-hostnametoken.tar.gz -C /tmp && test -f /tmp/backup/app_data/offen.db'
 
 echo "[TEST:PASS] Found relevant files in decrypted and untared remote backups."
 
@@ -52,9 +55,11 @@ docker-compose exec backup backup
 
 docker run --rm -it \
   -v compose_minio_backup_data:/minio_data \
-  -v compose_webdav_backup_data:/webdav_data alpine \
+  -v compose_webdav_backup_data:/webdav_data \
+  -v compose_ssh_backup_data:/ssh_data alpine \
   ash -c '[ $(find /minio_data/backup/ -type f | wc -l) = "1" ] && \
-          [ $(find /webdav_data/data/my/new/path/ -type f | wc -l) = "1" ]'
+          [ $(find /webdav_data/data/my/new/path/ -type f | wc -l) = "1" ] && \
+          [ $(find /ssh_data/ -type f | wc -l) = "1" ]'
 
 echo "[TEST:PASS] Remote backups have not been deleted."
 
@@ -66,3 +71,4 @@ fi
 echo "[TEST:PASS] Local backups have not been deleted."
 
 docker-compose down --volumes
+rm id_rsa id_rsa.pub