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docker/server/README.md
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# ClickHouse Server Docker Image
# ClickHouse Server Docker Imagex
## What is ClickHouse?
ClickHouse is an open-source column-oriented database management system that allows generating of analytical data reports in real-time.
ClickHouse is an open-source column-oriented database management system that allows the generation of analytical data reports in real-time.
ClickHouse manages extremely large volumes of data stably and sustainably. It currently powers [Yandex.Metrica](https://metrica.yandex.com/), the world’s [second-largest](http://w3techs.com/technologies/overview/traffic_analysis/all) web analytics platform, with over 13 trillion database records and over 20 billion events a day, generating customized reports on-the-fly, directly from non-aggregated data. This system was successfully implemented at [CERN’s LHCb experiment](https://www.yandex.com/company/press_center/press_releases/2012/2012-04-10/) to store and process metadata on 10bn events with over 1000 attributes per event registered in 2011.
@ -107,14 +107,14 @@ ClickHouse configuration is represented with a file "config.xml" ([documentation
docker run -d --name some-clickhouse-server --ulimit nofile=262144:262144 -v /path/to/your/config.xml:/etc/clickhouse-server/config.xml clickhouse/clickhouse-server
```
### Start server as custom user
### Start server as a custom user
```bash
# $(pwd)/data/clickhouse should exist and be owned by current user
docker run --rm --user ${UID}:${GID} --name some-clickhouse-server --ulimit nofile=262144:262144 -v "$(pwd)/logs/clickhouse:/var/log/clickhouse-server" -v "$(pwd)/data/clickhouse:/var/lib/clickhouse" clickhouse/clickhouse-server
```
When you use the image with mounting local directories inside you probably would like to not mess your directory tree with files owner and permissions. Then you could use `--user` argument. In this case, you should mount every necessary directory (`/var/lib/clickhouse` and `/var/log/clickhouse-server`) inside the container. Otherwise, the image will complain and not start.
When you use the image with local directories mounted, you probably would like to specify the user to maintain the proper file ownership. Use the `--user` argument and mount `/var/lib/clickhouse` and `/var/log/clickhouse-server` inside the container. Otherwise, the image will complain and not start.
### Start server from root (useful in case of userns enabled)