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docs: minor corrections to the docker documentation (#6869)

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The documentation referenced "data volume containers", which were
superseded by named volume support in Docker several years ago.

There were to bind-mounting examples in the docs that are effectively
doing the same thing, but the description of the second was somewhat
erroneous.

Signed-off-by: Lars Kellogg-Stedman <lars@redhat.com>
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Lars Kellogg-Stedman 2020-08-31 10:44:08 -04:00 committed by GitHub
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docs/installation.md
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@ -27,9 +27,9 @@ prom/prometheus`. This starts Prometheus with a sample
configuration and exposes it on port 9090. configuration and exposes it on port 9090.
The Prometheus image uses a volume to store the actual metrics. For The Prometheus image uses a volume to store the actual metrics. For
production deployments it is highly recommended to use the production deployments it is highly recommended to use a
[Data Volume Container](https://docs.docker.com/engine/admin/volumes/volumes/) [named volume](https://docs.docker.com/storage/volumes/)
pattern to ease managing the data on Prometheus upgrades. to ease managing the data on Prometheus upgrades.
To provide your own configuration, there are several options. Here are To provide your own configuration, there are several options. Here are
two examples. two examples.
@ -41,11 +41,12 @@ Bind-mount your `prometheus.yml` from the host by running:
```bash ```bash
docker run \ docker run \
-p 9090:9090 \ -p 9090:9090 \
-v /tmp/prometheus.yml:/etc/prometheus/prometheus.yml \ -v /path/to/prometheus.yml:/etc/prometheus/prometheus.yml \
prom/prometheus prom/prometheus
``` ```
Or use an additional volume for the config: Or bind-mount the directory containing `prometheus.yml` onto
`/etc/prometheus` by running:
```bash ```bash
docker run \ docker run \