moby/daemon/delete.go
Jana Radhakrishnan d18919e304 Docker integration with libnetwork
- Updated Dockerfile to satisfy libnetwork GOPATH requirements.
    - Reworked daemon to allocate network resources using libnetwork.
    - Reworked remove link code to also update network resources in libnetwork.
    - Adjusted the exec driver command population to reflect libnetwork design.
    - Adjusted the exec driver create command steps.
    - Updated a few test cases to reflect the change in design.
    - Removed the dns setup code from docker as resolv.conf is entirely managed
      in libnetwork.
    - Integrated with lxc exec driver.

Signed-off-by: Jana Radhakrishnan <mrjana@docker.com>
2015-05-19 22:40:19 +00:00

164 lines
4.6 KiB
Go

package daemon
import (
"fmt"
"os"
"path"
"github.com/Sirupsen/logrus"
)
type ContainerRmConfig struct {
ForceRemove, RemoveVolume, RemoveLink bool
}
func (daemon *Daemon) ContainerRm(name string, config *ContainerRmConfig) error {
container, err := daemon.Get(name)
if err != nil {
return err
}
if config.RemoveLink {
name, err := GetFullContainerName(name)
if err != nil {
return err
// TODO: why was just job.Error(err) without return if the function cannot continue w/o container name?
//job.Error(err)
}
parent, n := path.Split(name)
if parent == "/" {
return fmt.Errorf("Conflict, cannot remove the default name of the container")
}
pe := daemon.ContainerGraph().Get(parent)
if pe == nil {
return fmt.Errorf("Cannot get parent %s for name %s", parent, name)
}
parentContainer, _ := daemon.Get(pe.ID())
if err := daemon.ContainerGraph().Delete(name); err != nil {
return err
}
if parentContainer != nil {
parentContainer.DisableLink(n)
}
return nil
}
if container != nil {
// stop collection of stats for the container regardless
// if stats are currently getting collected.
daemon.statsCollector.stopCollection(container)
if container.IsRunning() {
if config.ForceRemove {
if err := container.Kill(); err != nil {
return fmt.Errorf("Could not kill running container, cannot remove - %v", err)
}
} else {
return fmt.Errorf("Conflict, You cannot remove a running container. Stop the container before attempting removal or use -f")
}
}
if config.ForceRemove {
if err := daemon.ForceRm(container); err != nil {
logrus.Errorf("Cannot destroy container %s: %v", name, err)
}
} else {
if err := daemon.Rm(container); err != nil {
return fmt.Errorf("Cannot destroy container %s: %v", name, err)
}
}
container.LogEvent("destroy")
if config.RemoveVolume {
daemon.DeleteVolumes(container.VolumePaths())
}
}
return nil
}
func (daemon *Daemon) DeleteVolumes(volumeIDs map[string]struct{}) {
for id := range volumeIDs {
if err := daemon.volumes.Delete(id); err != nil {
logrus.Infof("%s", err)
continue
}
}
}
func (daemon *Daemon) Rm(container *Container) (err error) {
return daemon.commonRm(container, false)
}
func (daemon *Daemon) ForceRm(container *Container) (err error) {
return daemon.commonRm(container, true)
}
// Destroy unregisters a container from the daemon and cleanly removes its contents from the filesystem.
func (daemon *Daemon) commonRm(container *Container, forceRemove bool) (err error) {
if container == nil {
return fmt.Errorf("The given container is <nil>")
}
element := daemon.containers.Get(container.ID)
if element == nil {
return fmt.Errorf("Container %v not found - maybe it was already destroyed?", container.ID)
}
// Container state RemovalInProgress should be used to avoid races.
if err = container.SetRemovalInProgress(); err != nil {
return fmt.Errorf("Failed to set container state to RemovalInProgress: %s", err)
}
defer container.ResetRemovalInProgress()
if err = container.Stop(3); err != nil {
return err
}
// Mark container dead. We don't want anybody to be restarting it.
container.SetDead()
// Save container state to disk. So that if error happens before
// container meta file got removed from disk, then a restart of
// docker should not make a dead container alive.
container.ToDisk()
// If force removal is required, delete container from various
// indexes even if removal failed.
defer func() {
if err != nil && forceRemove {
daemon.idIndex.Delete(container.ID)
daemon.containers.Delete(container.ID)
os.RemoveAll(container.root)
}
}()
container.derefVolumes()
if _, err := daemon.containerGraph.Purge(container.ID); err != nil {
logrus.Debugf("Unable to remove container from link graph: %s", err)
}
if err = daemon.driver.Remove(container.ID); err != nil {
return fmt.Errorf("Driver %s failed to remove root filesystem %s: %s", daemon.driver, container.ID, err)
}
initID := fmt.Sprintf("%s-init", container.ID)
if err := daemon.driver.Remove(initID); err != nil {
return fmt.Errorf("Driver %s failed to remove init filesystem %s: %s", daemon.driver, initID, err)
}
if err = os.RemoveAll(container.root); err != nil {
return fmt.Errorf("Unable to remove filesystem for %v: %v", container.ID, err)
}
if err = daemon.execDriver.Clean(container.ID); err != nil {
return fmt.Errorf("Unable to remove execdriver data for %s: %s", container.ID, err)
}
selinuxFreeLxcContexts(container.ProcessLabel)
daemon.idIndex.Delete(container.ID)
daemon.containers.Delete(container.ID)
return nil
}