Exemplo n.º 1
0
Arquivo: mongo.go Projeto: OSBI/juju
// IsMaster returns a boolean that represents whether the given
// machine's peer address is the primary mongo host for the replicaset
func IsMaster(session *mgo.Session, obj WithAddresses) (bool, error) {
	addrs := obj.Addresses()

	masterHostPort, err := replicaset.MasterHostPort(session)

	// If the replica set has not been configured, then we
	// can have only one master and the caller must
	// be that master.
	if err == replicaset.ErrMasterNotConfigured {
		return true, nil
	}
	if err != nil {
		return false, err
	}

	masterAddr, _, err := net.SplitHostPort(masterHostPort)
	if err != nil {
		return false, err
	}

	for _, addr := range addrs {
		if addr.Value == masterAddr {
			return true, nil
		}
	}
	return false, nil
}
Exemplo n.º 2
0
func (c *mongoConn) IsMaster() (bool, error) {
	hostPort, err := replicaset.MasterHostPort(c.session)
	if err != nil {
		logger.Errorf("replicaset.MasterHostPort returned error: %v", err)
		return false, err
	}
	logger.Errorf("replicaset.MasterHostPort(%s) returned %s", c.localHostPort, hostPort)
	logger.Errorf("-> %s IsMaster: %v", c.localHostPort, hostPort == c.localHostPort)
	return hostPort == c.localHostPort, nil
}
Exemplo n.º 3
0
Arquivo: mongo.go Projeto: bac/juju
// SetUpgradeMongoMode writes a value in the state server to be picked up
// by api servers to know that there is an upgrade ready to happen.
func (st *State) SetUpgradeMongoMode(v mongo.Version) (UpgradeMongoParams, error) {
	currentInfo, err := st.ControllerInfo()
	if err != nil {
		return UpgradeMongoParams{}, errors.Annotate(err, "could not obtain current controller information")
	}
	result := UpgradeMongoParams{}
	machines := []*Machine{}
	for _, mID := range currentInfo.VotingMachineIds {
		m, err := st.Machine(mID)
		if err != nil {
			return UpgradeMongoParams{}, errors.Annotate(err, "cannot change all the replicas")
		}
		isMaster, err := mongo.IsMaster(st.session, m)
		if err != nil {
			return UpgradeMongoParams{}, errors.Annotatef(err, "cannot determine if machine %q is master", mID)
		}
		paddr, err := m.PublicAddress()
		if err != nil {
			return UpgradeMongoParams{}, errors.Annotatef(err, "cannot obtain public address for machine: %v", m)
		}
		tag := m.Tag()
		mtag := tag.(names.MachineTag)
		member := HAMember{
			Tag:           mtag.Id(),
			PublicAddress: paddr,
			Series:        m.Series(),
		}
		if isMaster {
			result.Master = member
		} else {
			result.Members = append(result.Members, member)
		}
		machines = append(machines, m)
	}
	rsMembers, err := replicaset.CurrentMembers(st.session)
	if err != nil {
		return UpgradeMongoParams{}, errors.Annotate(err, "cannot obtain current replicaset members")
	}
	masterRs, err := replicaset.MasterHostPort(st.session)
	if err != nil {
		return UpgradeMongoParams{}, errors.Annotate(err, "cannot determine master on replicaset members")
	}
	for _, m := range rsMembers {
		if m.Address != masterRs {
			result.RsMembers = append(result.RsMembers, m)
		}
	}
	for _, m := range machines {
		if err := m.SetStopMongoUntilVersion(v); err != nil {
			return UpgradeMongoParams{}, errors.Annotate(err, "cannot trigger replica shutdown")
		}
	}
	return result, nil
}