//we use POST for both updating and inserting based on the ID passed in
func PostCluster(w rest.ResponseWriter, r *rest.Request) {
dbConn, err := util.GetConnection(CLUSTERADMIN_DB)
if err != nil {
logit.Error.Println("BackupNow: error " + err.Error())
rest.Error(w, err.Error(), 400)
return
}
defer dbConn.Close()
logit.Info.Println("PostCluster: in PostCluster")
cluster := Cluster{}
err = r.DecodeJsonPayload(&cluster)
if err != nil {
logit.Error.Println("PostCluster: error in decode" + err.Error())
rest.Error(w, err.Error(), http.StatusInternalServerError)
return
}
err = secimpl.Authorize(dbConn, cluster.Token, "perm-cluster")
if err != nil {
logit.Error.Println("PostCluster: authorize error " + err.Error())
rest.Error(w, err.Error(), http.StatusUnauthorized)
return
}
if cluster.Name == "" {
logit.Error.Println("PostCluster: error in Name")
rest.Error(w, "cluster name required", http.StatusBadRequest)
return
}
logit.Info.Println("PostCluster: have ID=" + cluster.ID + " Name=" + cluster.Name + " type=" + cluster.ClusterType + " status=" + cluster.Status)
dbcluster := admindb.Cluster{cluster.ID, cluster.ProjectID, cluster.Name, cluster.ClusterType, cluster.Status, "", cluster.Containers}
if cluster.ID == "" {
strid, err := admindb.InsertCluster(dbConn, dbcluster)
newid := strconv.Itoa(strid)
if err != nil {
logit.Error.Println("PostCluster:" + err.Error())
rest.Error(w, err.Error(), http.StatusBadRequest)
return
}
cluster.ID = newid
} else {
logit.Info.Println("PostCluster: about to call UpdateCluster")
err2 := admindb.UpdateCluster(dbConn, dbcluster)
if err2 != nil {
logit.Error.Println("PostCluster: error in UpdateCluster " + err.Error())
rest.Error(w, err.Error(), http.StatusBadRequest)
return
}
}
w.WriteJson(&cluster)
}
func configureCluster(dbConn *sql.DB, cluster admindb.Cluster, autocluster bool) error {
logit.Info.Println("configureCluster:GetCluster")
//get master node for this cluster
master, err := admindb.GetContainerMaster(dbConn, cluster.ID)
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
var pgport admindb.Setting
pgport, err = admindb.GetSetting(dbConn, "PG-PORT")
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster:GetContainerMaster")
//configure master postgresql.conf file
var data string
if cluster.ClusterType == "synchronous" {
data, err = template.Postgresql("master", pgport.Value, "*")
} else {
data, err = template.Postgresql("master", pgport.Value, "")
}
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster:master postgresql.conf generated")
//write master postgresql.conf file remotely
_, err = cpmcontainerapi.RemoteWritefileClient("/pgdata/postgresql.conf", data, master.Name)
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster:master postgresql.conf copied to remote")
//get domain name
var domainname admindb.Setting
domainname, err = admindb.GetSetting(dbConn, "DOMAIN-NAME")
if err != nil {
logit.Error.Println("configureCluster: DOMAIN-NAME err " + err.Error())
return err
}
//configure master pg_hba.conf file
rules := make([]template.Rule, 0)
data, err = template.Hba(dbConn, "master", master.Name, pgport.Value, cluster.ID, domainname.Value, rules)
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster:master pg_hba.conf generated")
//write master pg_hba.conf file remotely
_, err = cpmcontainerapi.RemoteWritefileClient("/pgdata/pg_hba.conf", data, master.Name)
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster:master pg_hba.conf copied remotely")
//restart postgres after the config file changes
var stopResp cpmcontainerapi.StopPGResponse
stopResp, err = cpmcontainerapi.StopPGClient(master.Name)
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster: master stoppg output was" + stopResp.Output)
var startResp cpmcontainerapi.StartPGResponse
startResp, err = cpmcontainerapi.StartPGClient(master.Name)
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster:master startpg output was" + startResp.Output)
//sleep loop until the master's PG can respond
var found = false
var currentStatus string
var masterhost = master.Name
for i := 0; i < 20; i++ {
currentStatus, err = GetPGStatus2(dbConn, master.Name, masterhost)
if currentStatus == "RUNNING" {
logit.Info.Println("master is running...continuing")
found = true
break
} else {
logit.Info.Println("sleeping 1 sec waiting on master..")
time.Sleep(1000 * time.Millisecond)
}
}
if !found {
logit.Info.Println("configureCluster: timed out waiting on master pg to start")
return errors.New("timeout waiting for master pg to respond")
}
standbynodes, err2 := admindb.GetAllStandbyContainers(dbConn, cluster.ID)
if err2 != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
//configure all standby nodes
var stopPGResp cpmcontainerapi.StopPGResponse
i := 0
for i = range standbynodes {
if standbynodes[i].Role == STANDBY {
//stop standby
if !autocluster {
stopPGResp, err = cpmcontainerapi.StopPGClient(standbynodes[i].Name)
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster:stop output was" + stopPGResp.Output)
}
//create base backup from master
var backupresp cpmcontainerapi.BasebackupResponse
backupresp, err = cpmcontainerapi.BasebackupClient(masterhost+"."+domainname.Value, standbynodes[i].Name)
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster:basebackup output was" + backupresp.Output)
data, err = template.Recovery(masterhost, pgport.Value, "postgres")
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster:standby recovery.conf generated")
//write standby recovery.conf file remotely
_, err = cpmcontainerapi.RemoteWritefileClient("/pgdata/recovery.conf", data, standbynodes[i].Name)
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster:standby recovery.conf copied remotely")
data, err = template.Postgresql(STANDBY, pgport.Value, "")
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
//write standby postgresql.conf file remotely
_, err = cpmcontainerapi.RemoteWritefileClient("/pgdata/postgresql.conf", data, standbynodes[i].Name)
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster:standby postgresql.conf copied remotely")
//configure standby pg_hba.conf file
data, err = template.Hba(dbConn, STANDBY, standbynodes[i].Name, pgport.Value, cluster.ID, domainname.Value, rules)
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster:standby pg_hba.conf generated")
//write standby pg_hba.conf file remotely
_, err = cpmcontainerapi.RemoteWritefileClient("/pgdata/pg_hba.conf", data, standbynodes[i].Name)
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster:standby pg_hba.conf copied remotely")
//start standby
var stResp cpmcontainerapi.StartPGOnStandbyResponse
stResp, err = cpmcontainerapi.StartPGOnStandbyClient(standbynodes[i].Name)
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster:standby startpg output was" + stResp.Output)
}
i++
}
logit.Info.Println("configureCluster: sleeping 5 seconds before configuring pgpool...")
time.Sleep(5000 * time.Millisecond)
pgpoolNode, err4 := admindb.GetContainerPgpool(dbConn, cluster.ID)
logit.Info.Println("configureCluster: lookup pgpool node")
if err4 != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster:" + pgpoolNode.Name)
//configure the pgpool includes all standby nodes AND the master node
poolnames := make([]string, len(standbynodes)+1)
i = 0
for i = range standbynodes {
poolnames[i] = standbynodes[i].Name + "." + domainname.Value
i++
}
poolnames[i] = master.Name + "." + domainname.Value
//generate pgpool.conf HOST_LIST
data, err = template.Poolconf(poolnames)
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster:pgpool pgpool.conf generated")
//write pgpool.conf to remote pool node
_, err = cpmcontainerapi.RemoteWritefileClient(util.GetBase()+"/bin/"+"pgpool.conf", data, pgpoolNode.Name)
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster:pgpool pgpool.conf copied remotely")
//generate pool_passwd
data, err = template.Poolpasswd()
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster:pgpool pool_passwd generated")
//write pgpool.conf to remote pool node
_, err = cpmcontainerapi.RemoteWritefileClient(util.GetBase()+"/bin/"+"pool_passwd", data, pgpoolNode.Name)
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster:pgpool pool_passwd copied remotely")
//generate pool_hba.conf
data, err = template.Poolhba()
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster:pgpool pool_hba generated")
//write pgpool.conf to remote pool node
_, err = cpmcontainerapi.RemoteWritefileClient(util.GetBase()+"/bin/"+"pool_hba.conf", data, pgpoolNode.Name)
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
logit.Info.Println("configureCluster:pgpool pool_hba copied remotely")
//start pgpool
var startPoolResp cpmcontainerapi.StartPgpoolResponse
startPoolResp, err = cpmcontainerapi.StartPgpoolClient(pgpoolNode.Name)
if err != nil {
logit.Error.Println("configureCluster: " + err.Error())
return err
}
logit.Info.Println("configureCluster: pgpool startpgpool output was" + startPoolResp.Output)
//finally, update the cluster to show that it is
//initialized!
cluster.Status = "initialized"
err = admindb.UpdateCluster(dbConn, cluster)
if err != nil {
logit.Error.Println("configureCluster:" + err.Error())
return err
}
return nil
}