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add pre/post update check lifecycle hooks

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This commit is contained in:
Niklas Wigertz 2019-08-21 16:00:54 +02:00
parent 5a6b63a5c7
commit 36b8994933
2 changed files with 64 additions and 0 deletions
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12
pkg/container/metadata.go
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@ -5,10 +5,22 @@ const (
signalLabel = "com.centurylinklabs.watchtower.stop-signal"
enableLabel = "com.centurylinklabs.watchtower.enable"
zodiacLabel = "com.centurylinklabs.zodiac.original-image"
preCheckLabel = "com.centurylinklabs.watchtower.lifecycle.pre-check"
postCheckLabel = "com.centurylinklabs.watchtower.lifecycle.post-check"
preUpdateLabel = "com.centurylinklabs.watchtower.lifecycle.pre-update"
postUpdateLabel = "com.centurylinklabs.watchtower.lifecycle.post-update"
)
// GetLifecyclePreCheckCommand returns the pre-check command set in the container metadata or an empty string
func (c Container) GetLifecyclePreCheckCommand() string {
return c.getLabelValueOrEmpty(preCheckLabel)
}
// GetLifecyclePostCheckCommand returns the post-check command set in the container metadata or an empty string
func (c Container) GetLifecyclePostCheckCommand() string {
return c.getLabelValueOrEmpty(postCheckLabel)
}
// GetLifecyclePreUpdateCommand returns the pre-update command set in the container metadata or an empty string
func (c Container) GetLifecyclePreUpdateCommand() string {
return c.getLabelValueOrEmpty(preUpdateLabel)