func (a *MachineAgent) uninstallAgent(agentConfig agent.Config) error {
var errors []error
agentServiceName := agentConfig.Value(agent.AgentServiceName)
if agentServiceName == "" {
// For backwards compatibility, handle lack of AgentServiceName.
agentServiceName = os.Getenv("UPSTART_JOB")
}
if agentServiceName != "" {
if err := upstart.NewService(agentServiceName).Remove(); err != nil {
errors = append(errors, fmt.Errorf("cannot remove service %q: %v", agentServiceName, err))
}
}
// Remove the juju-run symlink.
if err := os.Remove(jujuRun); err != nil && !os.IsNotExist(err) {
errors = append(errors, err)
}
namespace := agentConfig.Value(agent.Namespace)
if err := mongo.RemoveService(namespace); err != nil {
errors = append(errors, fmt.Errorf("cannot stop/remove mongo service with namespace %q: %v", namespace, err))
}
if err := os.RemoveAll(agentConfig.DataDir()); err != nil {
errors = append(errors, err)
}
if len(errors) == 0 {
return nil
}
return fmt.Errorf("uninstall failed: %v", errors)
}
func (c *BootstrapCommand) startMongo(addrs []instance.Address, agentConfig agent.Config) error {
logger.Debugf("starting mongo")
info, ok := agentConfig.StateInfo()
if !ok {
return fmt.Errorf("no state info available")
}
// When bootstrapping, we need to allow enough time for mongo
// to start as there's no retry loop in place.
// 5 minutes should suffice.
bootstrapDialOpts := state.DialOpts{Timeout: 5 * time.Minute}
dialInfo, err := state.DialInfo(info, bootstrapDialOpts)
if err != nil {
return err
}
servingInfo, ok := agentConfig.StateServingInfo()
if !ok {
return fmt.Errorf("agent config has no state serving info")
}
// Use localhost to dial the mongo server, because it's running in
// auth mode and will refuse to perform any operations unless
// we dial that address.
dialInfo.Addrs = []string{
net.JoinHostPort("127.0.0.1", fmt.Sprint(servingInfo.StatePort)),
}
logger.Debugf("calling ensureMongoServer")
err = ensureMongoServer(
agentConfig.DataDir(),
agentConfig.Value(agent.Namespace),
servingInfo,
)
if err != nil {
return err
}
peerAddr := mongo.SelectPeerAddress(addrs)
if peerAddr == "" {
return fmt.Errorf("no appropriate peer address found in %q", addrs)
}
peerHostPort := net.JoinHostPort(peerAddr, fmt.Sprint(servingInfo.StatePort))
return maybeInitiateMongoServer(peergrouper.InitiateMongoParams{
DialInfo: dialInfo,
MemberHostPort: peerHostPort,
})
}
func (a *MachineAgent) ensureMongoAdminUser(agentConfig agent.Config) (added bool, err error) {
stateInfo, ok1 := agentConfig.StateInfo()
servingInfo, ok2 := agentConfig.StateServingInfo()
if !ok1 || !ok2 {
return false, fmt.Errorf("no state serving info configuration")
}
dialInfo, err := state.DialInfo(stateInfo, state.DefaultDialOpts())
if err != nil {
return false, err
}
if len(dialInfo.Addrs) > 1 {
logger.Infof("more than one state server; admin user must exist")
return false, nil
}
return ensureMongoAdminUser(mongo.EnsureAdminUserParams{
DialInfo: dialInfo,
Namespace: agentConfig.Value(agent.Namespace),
DataDir: agentConfig.DataDir(),
Port: servingInfo.StatePort,
User: stateInfo.Tag,
Password: stateInfo.Password,
})
}
func containerManagerConfig(
containerType instance.ContainerType,
provisioner *apiprovisioner.State,
agentConfig agent.Config,
) (container.ManagerConfig, error) {
// Ask the provisioner for the container manager configuration.
managerConfigResult, err := provisioner.ContainerManagerConfig(
params.ContainerManagerConfigParams{Type: containerType},
)
if params.IsCodeNotImplemented(err) {
// We currently don't support upgrading;
// revert to the old configuration.
managerConfigResult.ManagerConfig = container.ManagerConfig{container.ConfigName: "juju"}
}
if err != nil {
return nil, err
}
// If a namespace is specified, that should instead be used as the config name.
if namespace := agentConfig.Value(agent.Namespace); namespace != "" {
managerConfigResult.ManagerConfig[container.ConfigName] = namespace
}
managerConfig := container.ManagerConfig(managerConfigResult.ManagerConfig)
return managerConfig, nil
}
// ensureMongoServer ensures that mongo is installed and running,
// and ready for opening a state connection.
func (a *MachineAgent) ensureMongoServer(agentConfig agent.Config) error {
servingInfo, ok := agentConfig.StateServingInfo()
if !ok {
return fmt.Errorf("state worker was started with no state serving info")
}
namespace := agentConfig.Value(agent.Namespace)
// When upgrading from a pre-HA-capable environment,
// we must add machine-0 to the admin database and
// initiate its replicaset.
//
// TODO(axw) remove this when we no longer need
// to upgrade from pre-HA-capable environments.
var shouldInitiateMongoServer bool
var addrs []instance.Address
if isPreHAVersion(agentConfig.UpgradedToVersion()) {
_, err := a.ensureMongoAdminUser(agentConfig)
if err != nil {
return err
}
if servingInfo.SharedSecret == "" {
servingInfo.SharedSecret, err = mongo.GenerateSharedSecret()
if err != nil {
return err
}
if err = a.ChangeConfig(func(config agent.ConfigSetter) {
config.SetStateServingInfo(servingInfo)
}); err != nil {
return err
}
agentConfig = a.CurrentConfig()
}
st, m, err := openState(agentConfig)
if err != nil {
return err
}
if err := st.SetStateServingInfo(servingInfo); err != nil {
st.Close()
return fmt.Errorf("cannot set state serving info: %v", err)
}
st.Close()
addrs = m.Addresses()
shouldInitiateMongoServer = true
}
// ensureMongoServer installs/upgrades the upstart config as necessary.
if err := ensureMongoServer(
agentConfig.DataDir(),
namespace,
servingInfo,
); err != nil {
return err
}
if !shouldInitiateMongoServer {
return nil
}
// Initiate the replicaset for upgraded environments.
//
// TODO(axw) remove this when we no longer need
// to upgrade from pre-HA-capable environments.
stateInfo, ok := agentConfig.StateInfo()
if !ok {
return fmt.Errorf("state worker was started with no state serving info")
}
dialInfo, err := state.DialInfo(stateInfo, state.DefaultDialOpts())
if err != nil {
return err
}
peerAddr := mongo.SelectPeerAddress(addrs)
if peerAddr == "" {
return fmt.Errorf("no appropriate peer address found in %q", addrs)
}
return maybeInitiateMongoServer(peergrouper.InitiateMongoParams{
DialInfo: dialInfo,
MemberHostPort: net.JoinHostPort(peerAddr, fmt.Sprint(servingInfo.StatePort)),
User: stateInfo.Tag,
Password: stateInfo.Password,
})
}