c4af30652d
It's used for updating properties of one or more containers, we only support resource configs for now. It can be extended in the future. Signed-off-by: Qiang Huang <h.huangqiang@huawei.com> Upstream-commit: 8799c4fc0feadede6ae60e77bd7d9dfd7cc72a79 Component: engine
59 lines
1.4 KiB
Go
59 lines
1.4 KiB
Go
package daemon
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import (
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"fmt"
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"github.com/docker/docker/api/types/container"
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)
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// ContainerUpdate updates resources 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)
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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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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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if container.RemovalInProgress || container.Dead {
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return 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 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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return err
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}
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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() {
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if err := daemon.execDriver.Update(container.Command); err != nil {
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return err
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}
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}
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return nil
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}
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