func (c *BootstrapCommand) startMongo(addrs []network.Address, agentConfig agent.Config) error {
logger.Debugf("starting mongo")
info, ok := agentConfig.MongoInfo()
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.
mongoDialOpts := mongo.DialOpts{Timeout: 5 * time.Minute}
dialInfo, err := mongo.DialInfo(info.Info, mongoDialOpts)
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")
ensureServerParams, err := cmdutil.NewEnsureServerParams(agentConfig)
if err != nil {
return err
}
err = cmdutil.EnsureMongoServer(ensureServerParams)
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))
if err := initiateMongoServer(peergrouper.InitiateMongoParams{
DialInfo: dialInfo,
MemberHostPort: peerHostPort,
}); err != nil {
return err
}
logger.Infof("started mongo")
return nil
}
func (s *MongoSuite) TestSelectPeerAddress(c *gc.C) {
addresses := []network.Address{{
Value: "10.0.0.1",
Type: network.IPv4Address,
Scope: network.ScopeCloudLocal,
}, {
Value: "8.8.8.8",
Type: network.IPv4Address,
Scope: network.ScopePublic,
}}
address := mongo.SelectPeerAddress(addresses)
c.Assert(address, gc.Equals, "10.0.0.1")
}
// ensureMongoServer ensures that mongo is installed and running,
// and ready for opening a state connection.
func (a *MachineAgent) ensureMongoServer(agentConfig agent.Config) (err error) {
a.mongoInitMutex.Lock()
defer a.mongoInitMutex.Unlock()
if a.mongoInitialized {
logger.Debugf("mongo is already initialized")
return nil
}
defer func() {
if err == nil {
a.mongoInitialized = true
}
}()
servingInfo, ok := agentConfig.StateServingInfo()
if !ok {
return fmt.Errorf("state worker was started with no state serving info")
}
// 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 []network.Address
if isPreHAVersion(a.previousAgentVersion) {
_, 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) error {
config.SetStateServingInfo(servingInfo)
return nil
}); err != nil {
return err
}
agentConfig = a.CurrentConfig()
}
// Note: we set Direct=true in the mongo options because it's
// possible that we've previously upgraded the mongo server's
// configuration to form a replicaset, but failed to initiate it.
st, m, err := openState(agentConfig, mongo.DialOpts{Direct: true})
if err != nil {
return err
}
ssi := paramsStateServingInfoToStateStateServingInfo(servingInfo)
if err := st.SetStateServingInfo(ssi); 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.
ensureServerParams, err := newEnsureServerParams(agentConfig)
if err != nil {
return err
}
if err := ensureMongoServer(ensureServerParams); 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.MongoInfo()
if !ok {
return fmt.Errorf("state worker was started with no state serving info")
}
dialInfo, err := mongo.DialInfo(stateInfo.Info, mongo.DefaultDialOpts())
if err != nil {
return err
}
peerAddr := mongo.SelectPeerAddress(addrs)
if peerAddr == "" {
return fmt.Errorf("no appropriate peer address found in %q", addrs)
}
if err := maybeInitiateMongoServer(peergrouper.InitiateMongoParams{
DialInfo: dialInfo,
MemberHostPort: net.JoinHostPort(peerAddr, fmt.Sprint(servingInfo.StatePort)),
// TODO(dfc) InitiateMongoParams should take a Tag
User: stateInfo.Tag.String(),
Password: stateInfo.Password,
}); err != nil {
return err
}
return 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 []network.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 := mongo.DialInfo(stateInfo.Info, mongo.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,
})
}