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moby--moby/daemon/start_unix.go

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// +build !windows
package daemon
import (
"fmt"
"github.com/docker/docker/container"
"github.com/docker/docker/libcontainerd"
)
// getLibcontainerdCreateOptions callers must hold a lock on the container
func (daemon *Daemon) getLibcontainerdCreateOptions(container *container.Container) ([]libcontainerd.CreateOption, error) {
createOptions := []libcontainerd.CreateOption{}
// Ensure a runtime has been assigned to this container
if container.HostConfig.Runtime == "" {
container.HostConfig.Runtime = daemon.configStore.GetDefaultRuntimeName()
container.CheckpointTo(daemon.containersReplica)
}
rt := daemon.configStore.GetRuntime(container.HostConfig.Runtime)
if rt == nil {
return nil, fmt.Errorf("no such runtime '%s'", container.HostConfig.Runtime)
}
if UsingSystemd(daemon.configStore) {
rt.Args = append(rt.Args, "--systemd-cgroup=true")
}
createOptions = append(createOptions, libcontainerd.WithRuntime(rt.Path, rt.Args))
return createOptions, nil
}