95 lines
2.7 KiB
Go
95 lines
2.7 KiB
Go
package daemon // import "github.com/docker/docker/daemon"
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
|
|
"github.com/docker/docker/api/types/container"
|
|
"github.com/docker/docker/errdefs"
|
|
"github.com/pkg/errors"
|
|
)
|
|
|
|
// ContainerUpdate updates configuration of the container
|
|
func (daemon *Daemon) ContainerUpdate(name string, hostConfig *container.HostConfig) (container.ContainerUpdateOKBody, error) {
|
|
var warnings []string
|
|
|
|
c, err := daemon.GetContainer(name)
|
|
if err != nil {
|
|
return container.ContainerUpdateOKBody{Warnings: warnings}, err
|
|
}
|
|
|
|
warnings, err = daemon.verifyContainerSettings(c.OS, hostConfig, nil, true)
|
|
if err != nil {
|
|
return container.ContainerUpdateOKBody{Warnings: warnings}, errdefs.InvalidParameter(err)
|
|
}
|
|
|
|
if err := daemon.update(name, hostConfig); err != nil {
|
|
return container.ContainerUpdateOKBody{Warnings: warnings}, err
|
|
}
|
|
|
|
return container.ContainerUpdateOKBody{Warnings: warnings}, nil
|
|
}
|
|
|
|
func (daemon *Daemon) update(name string, hostConfig *container.HostConfig) error {
|
|
if hostConfig == nil {
|
|
return nil
|
|
}
|
|
|
|
ctr, err := daemon.GetContainer(name)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
restoreConfig := false
|
|
backupHostConfig := *ctr.HostConfig
|
|
defer func() {
|
|
if restoreConfig {
|
|
ctr.Lock()
|
|
ctr.HostConfig = &backupHostConfig
|
|
ctr.CheckpointTo(daemon.containersReplica)
|
|
ctr.Unlock()
|
|
}
|
|
}()
|
|
|
|
if ctr.RemovalInProgress || ctr.Dead {
|
|
return errCannotUpdate(ctr.ID, fmt.Errorf("container is marked for removal and cannot be \"update\""))
|
|
}
|
|
|
|
ctr.Lock()
|
|
if err := ctr.UpdateContainer(hostConfig); err != nil {
|
|
restoreConfig = true
|
|
ctr.Unlock()
|
|
return errCannotUpdate(ctr.ID, err)
|
|
}
|
|
if err := ctr.CheckpointTo(daemon.containersReplica); err != nil {
|
|
restoreConfig = true
|
|
ctr.Unlock()
|
|
return errCannotUpdate(ctr.ID, err)
|
|
}
|
|
ctr.Unlock()
|
|
|
|
// if Restart Policy changed, we need to update container monitor
|
|
if hostConfig.RestartPolicy.Name != "" {
|
|
ctr.UpdateMonitor(hostConfig.RestartPolicy)
|
|
}
|
|
|
|
// If container is not running, update hostConfig struct is enough,
|
|
// resources will be updated when the container is started again.
|
|
// If container is running (including paused), we need to update configs
|
|
// to the real world.
|
|
if ctr.IsRunning() && !ctr.IsRestarting() {
|
|
if err := daemon.containerd.UpdateResources(context.Background(), ctr.ID, toContainerdResources(hostConfig.Resources)); err != nil {
|
|
restoreConfig = true
|
|
// TODO: it would be nice if containerd responded with better errors here so we can classify this better.
|
|
return errCannotUpdate(ctr.ID, errdefs.System(err))
|
|
}
|
|
}
|
|
|
|
daemon.LogContainerEvent(ctr, "update")
|
|
|
|
return nil
|
|
}
|
|
|
|
func errCannotUpdate(containerID string, err error) error {
|
|
return errors.Wrap(err, "Cannot update container "+containerID)
|
|
}
|