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watchtower/pkg/lifecycle/lifecycle.go

107 lines
3.4 KiB
Go

package lifecycle
import (
"github.com/containrrr/watchtower/pkg/container"
"github.com/containrrr/watchtower/pkg/types"
log "github.com/sirupsen/logrus"
)
// ExecutePreChecks tries to run the pre-check lifecycle hook for all containers included by the current filter.
func ExecutePreChecks(client container.Client, params types.UpdateParams) {
containers, err := client.ListContainers(params.Filter)
if err != nil {
return
}
for _, currentContainer := range containers {
ExecutePreCheckCommand(client, currentContainer)
}
}
// ExecutePostChecks tries to run the post-check lifecycle hook for all containers included by the current filter.
func ExecutePostChecks(client container.Client, params types.UpdateParams) {
containers, err := client.ListContainers(params.Filter)
if err != nil {
return
}
for _, currentContainer := range containers {
ExecutePostCheckCommand(client, currentContainer)
}
}
// ExecutePreCheckCommand tries to run the pre-check lifecycle hook for a single container.
func ExecutePreCheckCommand(client container.Client, container types.Container) {
clog := log.WithField("container", container.Name())
command := container.GetLifecyclePreCheckCommand()
if len(command) == 0 {
clog.Debug("No pre-check command supplied. Skipping")
return
}
clog.Debug("Executing pre-check command.")
_, err := client.ExecuteCommand(container.ID(), command, 1)
if err != nil {
clog.Error(err)
}
}
// ExecutePostCheckCommand tries to run the post-check lifecycle hook for a single container.
func ExecutePostCheckCommand(client container.Client, container types.Container) {
clog := log.WithField("container", container.Name())
command := container.GetLifecyclePostCheckCommand()
if len(command) == 0 {
clog.Debug("No post-check command supplied. Skipping")
return
}
clog.Debug("Executing post-check command.")
_, err := client.ExecuteCommand(container.ID(), command, 1)
if err != nil {
clog.Error(err)
}
}
// ExecutePreUpdateCommand tries to run the pre-update lifecycle hook for a single container.
func ExecutePreUpdateCommand(client container.Client, container types.Container) (SkipUpdate bool, err error) {
timeout := container.PreUpdateTimeout()
command := container.GetLifecyclePreUpdateCommand()
clog := log.WithField("container", container.Name())
if len(command) == 0 {
clog.Debug("No pre-update command supplied. Skipping")
return false, nil
}
if !container.IsRunning() || container.IsRestarting() {
clog.Debug("Container is not running. Skipping pre-update command.")
return false, nil
}
clog.Debug("Executing pre-update command.")
return client.ExecuteCommand(container.ID(), command, timeout)
}
// ExecutePostUpdateCommand tries to run the post-update lifecycle hook for a single container.
func ExecutePostUpdateCommand(client container.Client, newContainerID types.ContainerID) {
newContainer, err := client.GetContainer(newContainerID)
timeout := newContainer.PostUpdateTimeout()
if err != nil {
log.WithField("containerID", newContainerID.ShortID()).Error(err)
return
}
clog := log.WithField("container", newContainer.Name())
command := newContainer.GetLifecyclePostUpdateCommand()
if len(command) == 0 {
clog.Debug("No post-update command supplied. Skipping")
return
}
clog.Debug("Executing post-update command.")
_, err = client.ExecuteCommand(newContainerID, command, timeout)
if err != nil {
clog.Error(err)
}
}