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81 lines
3.3 KiB
Markdown
81 lines
3.3 KiB
Markdown
By default, watchtower will watch all containers. However, sometimes only some containers should be updated.
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There are two options:
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- **Fully exclude**: You can choose to exclude containers entirely from being watched by watchtower.
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- **Monitor only**: In this mode, watchtower checks for container updates, sends notifications and invokes the [pre-check/post-check hooks](https://containrrr.dev/watchtower/lifecycle-hooks/) on the containers but does **not** perform the update.
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## Full Exclude
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If you need to exclude some containers, set the _com.centurylinklabs.watchtower.enable_ label to `false`. For clarity this should be set **on the container(s)** you wish to be ignored, this is not set on watchtower.
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=== "dockerfile"
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```docker
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LABEL com.centurylinklabs.watchtower.enable="false"
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```
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=== "docker run"
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```bash
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docker run -d --label=com.centurylinklabs.watchtower.enable=false someimage
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```
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=== "docker-compose"
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``` yaml
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version: "3"
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services:
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someimage:
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container_name: someimage
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labels:
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- "com.centurylinklabs.watchtower.enable=false"
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```
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If instead you want to [only include containers with the enable label](https://containrrr.github.io/watchtower/arguments/#filter_by_enable_label), pass the `--label-enable` flag or the `WATCHTOWER_LABEL_ENABLE` environment variable on startup for watchtower and set the _com.centurylinklabs.watchtower.enable_ label with a value of `true` on the containers you want to watch.
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=== "dockerfile"
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```docker
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LABEL com.centurylinklabs.watchtower.enable="true"
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```
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=== "docker run"
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```bash
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docker run -d --label=com.centurylinklabs.watchtower.enable=true someimage
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```
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=== "docker-compose"
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``` yaml
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version: "3"
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services:
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someimage:
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container_name: someimage
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labels:
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- "com.centurylinklabs.watchtower.enable=true"
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```
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If you wish to create a monitoring scope, you will need to [run multiple instances and set a scope for each of them](https://containrrr.github.io/watchtower/running-multiple-instances).
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Watchtower filters running containers by testing them against each configured criteria. A container is monitored if all criteria are met. For example:
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- If a container's name is on the monitoring name list (not empty `--name` argument) but it is not enabled (_centurylinklabs.watchtower.enable=false_), it won't be monitored;
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- If a container's name is not on the monitoring name list (not empty `--name` argument), even if it is enabled (_centurylinklabs.watchtower.enable=true_ and `--label-enable` flag is set), it won't be monitored;
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## Monitor Only
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Individual containers can be marked to only be monitored (without being updated).
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To do so, set the *com.centurylinklabs.watchtower.monitor-only* label to `true` on that container.
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```docker
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LABEL com.centurylinklabs.watchtower.monitor-only="true"
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```
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Or, it can be specified as part of the `docker run` command line:
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```bash
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docker run -d --label=com.centurylinklabs.watchtower.monitor-only=true someimage
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```
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When the label is specified on a container, watchtower treats that container exactly as if [`WATCHTOWER_MONITOR_ONLY`](https://containrrr.dev/watchtower/arguments/#without_updating_containers) was set, but the effect is limited to the individual container.
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