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Update README.md (#1038)

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Better example for the quick start with prometheus config and avoiding deprecated env variables.

Signed-off-by: fhackenberger <florian@hackenberger.at>
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fhackenberger 2024-07-06 18:36:52 +02:00 committed by GitHub
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@ -17,10 +17,29 @@ docker run --net=host -it --rm -e POSTGRES_PASSWORD=password postgres
# Connect to it # Connect to it
docker run \ docker run \
--net=host \ --net=host \
-e DATA_SOURCE_NAME="postgresql://postgres:password@localhost:5432/postgres?sslmode=disable" \ -e DATA_SOURCE_URI="localhost:5432/postgres?sslmode=disable" \
-e DATA_SOURCE_USER=postgres \
-e DATA_SOURCE_PASS=password \
quay.io/prometheuscommunity/postgres-exporter quay.io/prometheuscommunity/postgres-exporter
``` ```
Test with:
```bash
curl "http://localhost:9187/metrics"
```
Example Prometheus config:
```yaml
scrape_configs:
- job_name: postgres
static_configs:
- targets: ["127.0.0.1:9187"] # Replace IP with the hostname of the docker container if you're running the container in a separate network
```
Now use the DATA_SOURCE_PASS_FILE with a mounted file containing the password to prevent having the password in an environment variable.
The container process runs with uid/gid 65534 (important for file permissions).
## Multi-Target Support (BETA) ## Multi-Target Support (BETA)
**This Feature is in beta and may require changes in future releases. Feedback is welcome.** **This Feature is in beta and may require changes in future releases. Feedback is welcome.**
@ -208,7 +227,7 @@ The following environment variables configure the exporter:
* `DATA_SOURCE_URI` * `DATA_SOURCE_URI`
an alternative to `DATA_SOURCE_NAME` which exclusively accepts the hostname an alternative to `DATA_SOURCE_NAME` which exclusively accepts the hostname
without a username and password component. For example, `my_pg_hostname` or without a username and password component. For example, `my_pg_hostname` or
`my_pg_hostname?sslmode=disable`. `my_pg_hostname:5432/postgres?sslmode=disable`.
* `DATA_SOURCE_URI_FILE` * `DATA_SOURCE_URI_FILE`
The same as above but reads the URI from a file. The same as above but reads the URI from a file.