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Implement Prometheus metrics

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ngosang
2023-07-23 21:13:07 +02:00
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@@ -226,23 +226,51 @@ This is the same as `request.get` but it takes one more param:
## Environment variables
| Name | Default | Notes |
|-----------------|------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------|
| LOG_LEVEL | info | Verbosity of the logging. Use `LOG_LEVEL=debug` for more information. |
| LOG_HTML | false | Only for debugging. If `true` all HTML that passes through the proxy will be logged to the console in `debug` level. |
| CAPTCHA_SOLVER | none | Captcha solving method. It is used when a captcha is encountered. See the Captcha Solvers section. |
| TZ | UTC | Timezone used in the logs and the web browser. Example: `TZ=Europe/London`. |
| HEADLESS | true | Only for debugging. To run the web browser in headless mode or visible. |
| BROWSER_TIMEOUT | 40000 | If you are experiencing errors/timeouts because your system is slow, you can try to increase this value. Remember to increase the `maxTimeout` parameter too. |
| TEST_URL | https://www.google.com | FlareSolverr makes a request on start to make sure the web browser is working. You can change that URL if it is blocked in your country. |
| PORT | 8191 | Listening port. You don't need to change this if you are running on Docker. |
| HOST | 0.0.0.0 | Listening interface. You don't need to change this if you are running on Docker. |
| Name | Default | Notes |
|--------------------|------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------|
| LOG_LEVEL | info | Verbosity of the logging. Use `LOG_LEVEL=debug` for more information. |
| LOG_HTML | false | Only for debugging. If `true` all HTML that passes through the proxy will be logged to the console in `debug` level. |
| CAPTCHA_SOLVER | none | Captcha solving method. It is used when a captcha is encountered. See the Captcha Solvers section. |
| TZ | UTC | Timezone used in the logs and the web browser. Example: `TZ=Europe/London`. |
| HEADLESS | true | Only for debugging. To run the web browser in headless mode or visible. |
| BROWSER_TIMEOUT | 40000 | If you are experiencing errors/timeouts because your system is slow, you can try to increase this value. Remember to increase the `maxTimeout` parameter too. |
| TEST_URL | https://www.google.com | FlareSolverr makes a request on start to make sure the web browser is working. You can change that URL if it is blocked in your country. |
| PORT | 8191 | Listening port. You don't need to change this if you are running on Docker. |
| HOST | 0.0.0.0 | Listening interface. You don't need to change this if you are running on Docker. |
| PROMETHEUS_ENABLED | false | Enable Prometheus exporter. See the Prometheus section below. |
| PROMETHEUS_PORT | 8192 | Listening port for Prometheus exporter. See the Prometheus section below. |
Environment variables are set differently depending on the operating system. Some examples:
* Docker: Take a look at the Docker section in this document. Environment variables can be set in the `docker-compose.yml` file or in the Docker CLI command.
* Linux: Run `export LOG_LEVEL=debug` and then start FlareSolverr in the same shell.
* Windows: Open `cmd.exe`, run `set LOG_LEVEL=debug` and then start FlareSolverr in the same shell.
## Prometheus exporter
The Prometheus exporter for FlareSolverr is disabled by default. It can be enabled with the environment variable `PROMETHEUS_ENABLED`. If you are using Docker make sure you expose the `PROMETHEUS_PORT`.
Example metrics:
```shell
# HELP flaresolverr_request_total Total requests with result
# TYPE flaresolverr_request_total counter
flaresolverr_request_total{domain="nowsecure.nl",result="solved"} 1.0
# HELP flaresolverr_request_created Total requests with result
# TYPE flaresolverr_request_created gauge
flaresolverr_request_created{domain="nowsecure.nl",result="solved"} 1.690141657157109e+09
# HELP flaresolverr_request_duration Request duration in seconds
# TYPE flaresolverr_request_duration histogram
flaresolverr_request_duration_bucket{domain="nowsecure.nl",le="0.0"} 0.0
flaresolverr_request_duration_bucket{domain="nowsecure.nl",le="10.0"} 1.0
flaresolverr_request_duration_bucket{domain="nowsecure.nl",le="25.0"} 1.0
flaresolverr_request_duration_bucket{domain="nowsecure.nl",le="50.0"} 1.0
flaresolverr_request_duration_bucket{domain="nowsecure.nl",le="+Inf"} 1.0
flaresolverr_request_duration_count{domain="nowsecure.nl"} 1.0
flaresolverr_request_duration_sum{domain="nowsecure.nl"} 5.858
# HELP flaresolverr_request_duration_created Request duration in seconds
# TYPE flaresolverr_request_duration_created gauge
flaresolverr_request_duration_created{domain="nowsecure.nl"} 1.6901416571570296e+09
```
## Captcha Solvers
> **Warning**