+ return service.Command(arvados.ServiceNameKeepbalance,
+ func(ctx context.Context, cluster *arvados.Cluster, token string, registry *prometheus.Registry) service.Handler {
+ if !options.Once && cluster.Collections.BalancePeriod == arvados.Duration(0) {
+ return service.ErrorHandler(ctx, cluster, fmt.Errorf("cannot start service: Collections.BalancePeriod is zero (if you want to run once and then exit, use the -once flag)"))
+ }
+
+ ac, err := arvados.NewClientFromConfig(cluster)
+ ac.AuthToken = token
+ if err != nil {
+ return service.ErrorHandler(ctx, cluster, fmt.Errorf("error initializing client from cluster config: %s", err))
+ }
+
+ db, err := sqlx.Open("postgres", cluster.PostgreSQL.Connection.String())
+ if err != nil {
+ return service.ErrorHandler(ctx, cluster, fmt.Errorf("postgresql connection failed: %s", err))
+ }
+ if p := cluster.PostgreSQL.ConnectionPool; p > 0 {
+ db.SetMaxOpenConns(p)
+ }
+ err = db.Ping()
+ if err != nil {
+ return service.ErrorHandler(ctx, cluster, fmt.Errorf("postgresql connection succeeded but ping failed: %s", err))
+ }
+
+ if options.Logger == nil {
+ options.Logger = ctxlog.FromContext(ctx)
+ }
+
+ srv := &Server{
+ Cluster: cluster,
+ ArvClient: ac,
+ RunOptions: options,
+ Metrics: newMetrics(registry),
+ Logger: options.Logger,
+ Dumper: options.Dumper,
+ DB: db,
+ }
+ srv.Handler = &health.Handler{
+ Token: cluster.ManagementToken,
+ Prefix: "/_health/",
+ Routes: health.Routes{"ping": srv.CheckHealth},
+ }
+
+ go srv.run(ctx)
+ return srv
+ }).RunCommand(prog, args, stdin, stdout, stderr)