// setupContainerSupport determines what containers can be run on this machine and // initialises suitable infrastructure to support such containers. func (a *MachineAgent) setupContainerSupport(runner worker.Runner, st *api.State, entity *apiagent.Entity, agentConfig agent.Config) error { var supportedContainers []instance.ContainerType // We don't yet support nested lxc containers but anything else can run an LXC container. if entity.ContainerType() != instance.LXC { supportedContainers = append(supportedContainers, instance.LXC) } supportsKvm, err := kvm.IsKVMSupported() if err != nil { logger.Warningf("determining kvm support: %v\nno kvm containers possible", err) } if err == nil && supportsKvm { supportedContainers = append(supportedContainers, instance.KVM) } return a.updateSupportedContainers(runner, st, entity.Tag(), supportedContainers, agentConfig) }
func setAgentPassword(newPw, oldPw string, a agent.Agent, entity *apiagent.Entity) error { // Change the configuration *before* setting the entity // password, so that we avoid the possibility that // we might successfully change the entity's // password but fail to write the configuration, // thus locking us out completely. if err := a.ChangeConfig(func(c agent.ConfigSetter) error { c.SetPassword(newPw) c.SetOldPassword(oldPw) return nil }); err != nil { return err } return entity.SetPassword(newPw) }