// attemptInitiateMongoServer attempts to initiate the replica set.
func attemptInitiateMongoServer(dialInfo *mgo.DialInfo, memberHostPort string) error {
session, err := mgo.DialWithInfo(dialInfo)
if err != nil {
return errors.Annotatef(err, "cannot dial mongo to initiate replicaset")
}
defer session.Close()
session.SetSocketTimeout(mongo.SocketTimeout)
return replicaset.Initiate(
session,
memberHostPort,
mongo.ReplicaSetName,
map[string]string{
jujuMachineKey: agent.BootstrapMachineId,
},
)
}
// attemptInitiateMongoServer attempts to initiate the replica set.
func attemptInitiateMongoServer(dialInfo *mgo.DialInfo, memberHostPort string, force bool) error {
session, err := mgo.DialWithInfo(dialInfo)
if err != nil {
return errors.Annotatef(err, "cannot dial mongo to initiate replicaset")
}
defer session.Close()
session.SetSocketTimeout(mongo.SocketTimeout)
if !force {
bInfo, err := session.BuildInfo()
if err != nil && isNotUnreachableError(err) {
return errors.Annotate(err, "cannot determine mongo build information")
}
var cfg *replicaset.Config
if err != nil || !bInfo.VersionAtLeast(3) {
cfg, err = replicaset.CurrentConfig(session)
if err != nil && err != mgo.ErrNotFound {
return errors.Errorf("cannot get replica set configuration: %v", err)
}
}
if cfg != nil && len(cfg.Members) > 0 {
logger.Infof("replica set configuration found: %#v", cfg)
return ErrReplicaSetAlreadyInitiated
}
}
return replicaset.Initiate(
session,
memberHostPort,
mongo.ReplicaSetName,
map[string]string{
jujuMachineKey: agent.BootstrapMachineId,
},
)
}
// startReplicaSet starts up a replica set with n mongo instances.
func startReplicaSet(n int) (_ []*gitjujutesting.MgoInstance, err error) {
insts := make([]*gitjujutesting.MgoInstance, 0, n)
root, err := newMongoInstance()
if err != nil {
return nil, err
}
insts = append(insts, root)
defer func() {
if err == nil {
return
}
for _, inst := range insts {
inst.Destroy()
}
}()
dialInfo := root.DialInfo()
dialInfo.Direct = true
dialInfo.Timeout = 60 * time.Second
session, err := root.DialDirect()
if err != nil {
return nil, fmt.Errorf("cannot dial root instance: %v", err)
}
defer session.Close()
logger.Infof("dialled root instance")
if err := replicaset.Initiate(session, root.Addr(), replicaSetName, nil); err != nil {
return nil, fmt.Errorf("cannot initiate replica set: %v", err)
}
var members []replicaset.Member
for i := 1; i < n; i++ {
inst, err := newMongoInstance()
if err != nil {
return nil, err
}
insts = append(insts, inst)
members = append(members, replicaset.Member{
Address: inst.Addr(),
Priority: newFloat64(0.1),
Id: i + 1,
})
}
attempt := utils.AttemptStrategy{
Total: 60 * time.Second,
Delay: 1 * time.Second,
}
for a := attempt.Start(); a.Next(); {
err := replicaset.Add(session, members...)
if err == nil {
break
}
logger.Errorf("cannot add members: %v", err)
if !a.HasNext() {
return nil, fmt.Errorf("timed out trying to add members")
}
logger.Errorf("retrying")
}
return insts, err
}