a0191a2341
Remove function `WaitRunning` because it's actually not necessary, also remove wait channel for state "running" to avoid mixed use of the state wait channel. Signed-off-by: Zhang Wei <zhangwei555@huawei.com>
94 lines
2.5 KiB
Go
94 lines
2.5 KiB
Go
package daemon
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import (
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"fmt"
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"github.com/docker/engine-api/types/container"
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)
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// ContainerUpdate updates configuration of the container
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func (daemon *Daemon) ContainerUpdate(name string, hostConfig *container.HostConfig) ([]string, error) {
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var warnings []string
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warnings, err := daemon.verifyContainerSettings(hostConfig, nil, true)
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if err != nil {
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return warnings, err
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}
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if err := daemon.update(name, hostConfig); err != nil {
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return warnings, err
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}
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return warnings, nil
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}
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// ContainerUpdateCmdOnBuild updates Path and Args for the container with ID cID.
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func (daemon *Daemon) ContainerUpdateCmdOnBuild(cID string, cmd []string) error {
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if len(cmd) == 0 {
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return nil
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}
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c, err := daemon.GetContainer(cID)
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if err != nil {
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return err
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}
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c.Path = cmd[0]
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c.Args = cmd[1:]
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return nil
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}
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func (daemon *Daemon) update(name string, hostConfig *container.HostConfig) error {
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if hostConfig == nil {
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return nil
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}
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container, err := daemon.GetContainer(name)
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if err != nil {
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return err
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}
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restoreConfig := false
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backupHostConfig := *container.HostConfig
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defer func() {
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if restoreConfig {
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container.Lock()
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container.HostConfig = &backupHostConfig
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container.ToDisk()
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container.Unlock()
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}
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}()
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if container.RemovalInProgress || container.Dead {
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return errCannotUpdate(container.ID, fmt.Errorf("Container is marked for removal and cannot be \"update\"."))
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}
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if container.IsRunning() && hostConfig.KernelMemory != 0 {
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return errCannotUpdate(container.ID, fmt.Errorf("Can not update kernel memory to a running container, please stop it first."))
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}
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if err := container.UpdateContainer(hostConfig); err != nil {
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restoreConfig = true
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return errCannotUpdate(container.ID, err)
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}
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// if Restart Policy changed, we need to update container monitor
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container.UpdateMonitor(hostConfig.RestartPolicy)
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// If container is not running, update hostConfig struct is enough,
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// resources will be updated when the container is started again.
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// If container is running (including paused), we need to update configs
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// to the real world.
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if container.IsRunning() && !container.IsRestarting() {
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if err := daemon.containerd.UpdateResources(container.ID, toContainerdResources(hostConfig.Resources)); err != nil {
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restoreConfig = true
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return errCannotUpdate(container.ID, err)
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}
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}
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daemon.LogContainerEvent(container, "update")
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return nil
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}
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func errCannotUpdate(containerID string, err error) error {
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return fmt.Errorf("Cannot update container %s: %v", containerID, err)
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}
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