Exemplo n.º 1
0
func main() {
	flag.Parse()

	if flags.Help {
		flag.Usage()
		os.Exit(2)
	}

	if flags.Version {
		fmt.Printf("%s main: %s, data: %s\n",
			path.Base(os.Args[0]), cbgt.VERSION, cbgt.VERSION)
		os.Exit(0)
	}

	cmd.MainCommon(cbgt.VERSION, flagAliases)

	cfg, err := cmd.MainCfgClient(path.Base(os.Args[0]), flags.CfgConnect)
	if err != nil {
		log.Fatalf("%v", err)
		return
	}

	if flags.IndexTypes != "" {
		cmd.RegisterIndexTypes(strings.Split(flags.IndexTypes, ","))
	}

	nodesToRemove := []string(nil)
	if len(flags.RemoveNodes) > 0 {
		nodesToRemove = strings.Split(flags.RemoveNodes, ",")
	}

	var steps map[string]bool
	if flags.Steps != "" {
		steps = cbgt.StringsToMap(strings.Split(flags.Steps, ","))
	}

	// ------------------------------------------------

	if steps == nil || steps["rebalance"] {
		log.Printf("main: step rebalance")

		err := runRebalance(cfg, flags.Server, nodesToRemove,
			flags.FavorMinNodes, flags.DryRun, flags.Verbose)
		if err != nil {
			log.Fatalf("%v", err)
			return
		}
	}

	// ------------------------------------------------

	err = cmd.PlannerSteps(steps, cfg, cbgt.VERSION,
		flags.Server, nodesToRemove, flags.DryRun)
	if err != nil {
		log.Fatalf("%v", err)
		return
	}

	log.Printf("main: done")
}
Exemplo n.º 2
0
// Failover promotes replicas to primary for the remaining nodes.
func Failover(cfg cbgt.Cfg, version string, server string,
	options map[string]string, nodesFailover []string) (bool, error) {
	mapNodesFailover := cbgt.StringsToMap(nodesFailover)

	uuid := ""

	indexDefs, nodeDefs, planPIndexesPrev, cas, err :=
		cbgt.PlannerGetPlan(cfg, version, uuid)
	if err != nil {
		return false, err
	}

	planPIndexesCalc, err := cbgt.CalcPlan("failover",
		indexDefs, nodeDefs, planPIndexesPrev, version, server, options, nil)
	if err != nil {
		return false, fmt.Errorf("planner: failover CalcPlan, err: %v", err)
	}

	planPIndexesNext := cbgt.CopyPlanPIndexes(planPIndexesPrev, version)
	for planPIndexName, planPIndex := range planPIndexesNext.PlanPIndexes {
		for node, planPIndexNode := range planPIndex.Nodes {
			if !mapNodesFailover[node] {
				continue
			}

			if planPIndexNode.Priority <= 0 {
				// Failover'ed node used to be a primary for this
				// pindex, so find a replica to promote.
				promoted := ""

			PROMOTE_REPLICA:
				for nodePro, ppnPro := range planPIndex.Nodes {
					if mapNodesFailover[nodePro] {
						continue
					}

					if ppnPro.Priority >= 1 {
						ppnPro.Priority = 0
						planPIndex.Nodes[nodePro] = ppnPro
						promoted = nodePro
						break PROMOTE_REPLICA
					}
				}

				// If we didn't find a replica to promote, and we're
				// configured with the option to
				// "failoverAssignAllPrimaries-IndexName" or
				// "failoverAssignAllPrimaries" (default true), then
				// assign the primary from the calculated plan.
				if promoted == "" && ParseOptionsBool(options,
					"failoverAssignAllPrimaries", planPIndex.IndexName, true) {
					planPIndexCalc, exists :=
						planPIndexesCalc.PlanPIndexes[planPIndexName]
					if exists && planPIndexCalc != nil {
					ASSIGN_PRIMARY:
						for nodeCalc, ppnCalc := range planPIndexCalc.Nodes {
							if ppnCalc.Priority <= 0 &&
								!mapNodesFailover[nodeCalc] {
								planPIndex.Nodes[nodeCalc] = ppnCalc
								promoted = nodeCalc
								break ASSIGN_PRIMARY
							}
						}
					}
				}
			}

			delete(planPIndex.Nodes, node)
		}
	}

	// TODO: Missing under-replication constraint warnings.

	if cbgt.SamePlanPIndexes(planPIndexesNext, planPIndexesPrev) {
		return false, nil
	}

	_, err = cbgt.CfgSetPlanPIndexes(cfg, planPIndexesNext, cas)
	if err != nil {
		return false, fmt.Errorf("planner: failover could not save plan,"+
			" perhaps a concurrent planner won, cas: %d, err: %v",
			cas, err)
	}

	return true, nil
}
Exemplo n.º 3
0
// Failover promotes replicas to primary for the remaining nodes.
func Failover(cfg cbgt.Cfg, version string, server string,
	nodesFailover []string) (bool, error) {
	mapNodesFailover := cbgt.StringsToMap(nodesFailover)

	uuid := ""

	indexDefs, nodeDefs, planPIndexesPrev, cas, err :=
		cbgt.PlannerGetPlan(cfg, version, uuid)
	if err != nil {
		return false, err
	}

	planPIndexesCalc, err := cbgt.CalcPlan("failover",
		indexDefs, nodeDefs, planPIndexesPrev, version, server)
	if err != nil {
		return false, fmt.Errorf("planner: failover CalcPlan, err: %v", err)
	}

	planPIndexesNext := cbgt.CopyPlanPIndexes(planPIndexesPrev, version)
	for planPIndexName, planPIndex := range planPIndexesNext.PlanPIndexes {
		for node, planPIndexNode := range planPIndex.Nodes {
			if !mapNodesFailover[node] {
				continue
			}

			if planPIndexNode.Priority <= 0 {
				// Failover'ed node used to be a primary for this
				// pindex, so find a replica to promote.
				promoted := ""

			PROMOTE_REPLICA:
				for nodePro, ppnPro := range planPIndex.Nodes {
					if mapNodesFailover[nodePro] {
						continue
					}

					if ppnPro.Priority >= 1 {
						ppnPro.Priority = 0
						planPIndex.Nodes[nodePro] = ppnPro
						promoted = nodePro
						break PROMOTE_REPLICA
					}
				}

				if promoted == "" {
					// Didn't find a replica to promote, so consult the
					// calculated plan for the primary assignment.
					planPIndexCalc, exists :=
						planPIndexesCalc.PlanPIndexes[planPIndexName]
					if exists && planPIndexCalc != nil {
					PROMOTE_CALC:
						for nodeCalc, ppnCalc := range planPIndexCalc.Nodes {
							if ppnCalc.Priority <= 0 &&
								!mapNodesFailover[nodeCalc] {
								planPIndex.Nodes[nodeCalc] = ppnCalc
								promoted = nodeCalc
								break PROMOTE_CALC
							}
						}
					}
				}
			}

			delete(planPIndex.Nodes, node)
		}
	}

	// TODO: Missing under-replication constraint warnings.

	if cbgt.SamePlanPIndexes(planPIndexesNext, planPIndexesPrev) {
		return false, nil
	}

	_, err = cbgt.CfgSetPlanPIndexes(cfg, planPIndexesNext, cas)
	if err != nil {
		return false, fmt.Errorf("planner: failover could not save plan,"+
			" perhaps a concurrent planner won, cas: %d, err: %v",
			cas, err)
	}

	return true, nil
}
Exemplo n.º 4
0
func main() {
	flag.Parse()

	if flags.Help {
		flag.Usage()
		os.Exit(2)
	}

	if flags.Version {
		fmt.Printf("%s main: %s, data: %s\n",
			path.Base(os.Args[0]), cbgt.VERSION, cbgt.VERSION)
		os.Exit(0)
	}

	cmd.MainCommon(cbgt.VERSION, flagAliases)

	cfg, err := cmd.MainCfgClient(path.Base(os.Args[0]), flags.CfgConnect)
	if err != nil {
		log.Fatalf("%v", err)
		return
	}

	if flags.IndexTypes != "" {
		cmd.RegisterIndexTypes(strings.Split(flags.IndexTypes, ","))
	}

	nodesToRemove := []string(nil)
	if len(flags.RemoveNodes) > 0 {
		nodesToRemove = strings.Split(flags.RemoveNodes, ",")
	}

	steps := map[string]bool{}
	if flags.Steps != "" {
		steps = cbgt.StringsToMap(strings.Split(flags.Steps, ","))
	}

	// ------------------------------------------------

	if steps != nil && steps["rebalance"] {
		steps["rebalance_"] = true
		steps["unregister"] = true
		steps["planner"] = true
	}

	// ------------------------------------------------

	if steps != nil && steps["rebalance_"] {
		log.Printf("main: step rebalance_")

		err := rebalance.RunRebalance(cfg, flags.Server, nodesToRemove,
			flags.FavorMinNodes, flags.DryRun, flags.Verbose, nil)
		if err != nil {
			log.Fatalf("main: RunRebalance, err: %v", err)
			return
		}
	}

	// ------------------------------------------------

	err = cmd.PlannerSteps(steps, cfg, cbgt.VERSION,
		flags.Server, nodesToRemove, flags.DryRun, nil)
	if err != nil {
		log.Fatalf("main: PlannerSteps, err: %v", err)
		return
	}

	// ------------------------------------------------

	var c *ctl.Ctl

	if steps != nil && (steps["service"] || steps["rest"] || steps["prompt"]) {
		c, err = ctl.StartCtl(cfg, flags.Server, ctl.CtlOptions{
			DryRun:             flags.DryRun,
			Verbose:            flags.Verbose,
			FavorMinNodes:      flags.FavorMinNodes,
			WaitForMemberNodes: flags.WaitForMemberNodes,
		})
		if err != nil {
			log.Fatalf("main: StartCtl, err: %v", err)
			return
		}

		if steps["service"] {
			// TODO.
		}

		if steps["rest"] {
			bindHttp := flags.BindHttp
			if bindHttp[0] == ':' {
				bindHttp = "localhost" + bindHttp
			}
			if strings.HasPrefix(bindHttp, "0.0.0.0:") {
				bindHttp = "localhost" + bindHttp[len("0.0.0.0"):]
			}

			http.Handle("/", newRestRouter(c))

			go func() {
				log.Printf("------------------------------------------------------------")
				log.Printf("REST API is available: http://%s", bindHttp)
				log.Printf("------------------------------------------------------------")

				err := http.ListenAndServe(bindHttp, nil) // Blocks.
				if err != nil {
					log.Fatalf("main: listen, err: %v\n"+
						"  Please check that your -bindHttp parameter (%q)\n"+
						"  is correct and available.", err, bindHttp)
				}
			}()
		}

		if steps["prompt"] {
			go runCtlPrompt(c)
		}

		<-make(chan struct{})
	}

	// ------------------------------------------------

	log.Printf("main: done")
}