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@@ -224,19 +224,23 @@ Check that the measurement `foo` is added in the DB.
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- [Output Plugins](https://docs.influxdata.com/telegraf/latest/plugins/outputs/)
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-### Monitoring the host filesystem
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+### Monitoring the Docker Engine Host
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-One of the more common use cases for Telegraf is running it in a container to monitor the host filesystem using the inputs that take information from the `/proc` filesystem. This section only applies to monitoring a Linux host.
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+One common use case for Telegraf is to monitor the Docker Engine Host from within a container. The recommended technique is to mount the host filesystems into the container and use environment variables to instruct Telegraf where to locate the filesystems.
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-To do this, you can mount the host's `/proc` filesystem inside of the container and set the location of `/proc` to an alternate location by using the `HOST_PROC` environment variable to change the location of where `/proc` is located. As an example:
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+The precise files that need to be made available varies from plugin to plugin. Here is an example showing the full set of supported locations:
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```console
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$ docker run -d --name=telegraf \
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- --net=influxdb \
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- -e HOST_PROC=/host/proc \
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- -v /proc:/host/proc:ro \
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- -v $PWD/telegraf.conf:/etc/telegraf/telegraf.conf:ro \
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- telegraf
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+ -v $PWD/telegraf.conf:/etc/telegraf/telegraf.conf:ro \
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+ -v /:/hostfs:ro \
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+ -e HOST_ETC=/hostfs/etc \
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+ -e HOST_PROC=/hostfs/proc \
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+ -e HOST_SYS=/hostfs/sys \
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+ -e HOST_VAR=/hostfs/var \
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+ -e HOST_RUN=/hostfs/run \
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+ -e HOST_MOUNT_PREFIX=/hostfs \
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+ telegraf
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```
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### Monitoring docker containers
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Docker Library Bot