docker-library
/
docs
mirror of https://github.com/docker-library/docs.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #1760 from 31z4/zookeeper 

Document Zookeeper's ZOO_CFG_EXTRA
This commit is contained in:
Tianon Gravi 2020-07-06 10:47:28 -07:00 committed by GitHub
parent a9716551e5 694137b950
commit 2f62f0f9e0
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 11 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
zookeeper/content.md
View File

@ -108,7 +108,17 @@ Defaults to `srvr`. Zookeeper's [`4lw.commands.whitelist`](https://zookeeper.apa
## Advanced configuration
Not every Zookeeper configuration setting is exposed via the environment variables listed above. These variables are only meant to cover minimum configuration keywords and some often changing options. If [mounting your custom config file](#configuration) as a volume doesn't work for you, consider using `JVMFLAGS` environment variable. Many of the Zookeeper advanced configuration options can be set there using Java system properties in the form of `-Dproperty=value`. For example, you can use Netty instead of NIO (default option) as a server communication framework:
### `ZOO_CFG_EXTRA`
Not every Zookeeper configuration setting is exposed via the environment variables listed above. These variables are only meant to cover minimum configuration keywords and some often changing options. If [mounting your custom config file](#configuration) as a volume doesn't work for you, consider using `ZOO_CFG_EXTRA` environment variable. You can add arbitrary configuration parameters to Zookeeper configuration file using this variable. The following example shows how to enable Prometheus metrics exporter on port `7070`:
```console
$ docker run --name some-zookeeper --restart always -e ZOO_CFG_EXTRA="metricsProvider.className=org.apache.zookeeper.metrics.prometheus.PrometheusMetricsProvider metricsProvider.httpPort=7070" %%IMAGE%%
```
### `JVMFLAGS`
Many of the Zookeeper advanced configuration options can be set there using Java system properties in the form of `-Dproperty=value`. For example, you can use Netty instead of NIO (default option) as a server communication framework:
```console
$ docker run --name some-zookeeper --restart always -e JVMFLAGS="-Dzookeeper.serverCnxnFactory=org.apache.zookeeper.server.NettyServerCnxnFactory" %%IMAGE%%