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Adds scopeUID config to enable multiple instances of Watchtower (#511)

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* Adds scopeUID config to enable multiple instances of Watchtower

* Adds tests for multiple instance support with scopeuid

* Adds docs on scope monitoring and multiple instance support

* Adds multiple instances docs to mkdocs config file

* Changes multiple instances check and refactors naming for scope feature

* Applies linter suggestions

* Fixes documentation on Watchtower monitoring scope
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Victor Moura 2020-08-21 15:13:47 -03:00 • committed by GitHub
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@ -228,6 +228,16 @@ Environment Variable: WATCHTOWER_HTTP_API_TOKEN
Default: -
```
## Filter by scope
Update containers that have a `com.centurylinklabs.watchtower.scope` label set with the same value as the given argument. This enables [running multiple instances](https://containrrr.github.io/watchtower/running-multiple-instances).
```
Argument: --scope
Environment Variable: WATCHTOWER_SCOPE
Type: String
Default: -
```
## Scheduling
[Cron expression](https://pkg.go.dev/github.com/robfig/cron@v1.2.0?tab=doc#hdr-CRON_Expression_Format) in 6 fields (rather than the traditional 5) which defines when and how often to check for new images. Either `--interval` or the schedule expression
can be defined, but not both. An example: `--schedule "0 0 4 * * *"`