Example #1
0
func (this *Consumers) cleanupStaleConsumerGroups(zkzone *zk.ZkZone, clusterPattern string) {
	// what consumer groups are safe to delete?
	// 1. not online
	// 2. have no offsets
	this.Ui.Output(color.Blue(zkzone.Name()))

	zkzone.ForSortedClusters(func(zkcluster *zk.ZkCluster) {
		if !patternMatched(zkcluster.Name(), clusterPattern) {
			return
		}

		this.Ui.Output(strings.Repeat(" ", 4) + zkcluster.Name())
		consumerGroups := zkcluster.ConsumerGroups()
		for group, consumers := range consumerGroups {
			if len(consumers) > 0 {
				// this consumer group is online
				continue
			}

			if !patternMatched(group, this.groupPattern) {
				continue
			}

			if !strings.HasPrefix(group, "console-consumer-") {
				path := zkcluster.ConsumerGroupOffsetPath(group)
				_, _, err := zkzone.Conn().Children(path)
				if err == nil {
					this.Ui.Warn(fmt.Sprintf("%s not empty, unsafe to cleanup", path))
					continue
				}

				if err != gozk.ErrNoNode {
					// should never happen
					swallow(err)
				}
			}

			// have no offsets, safe to delete
			if this.confirmYes {
				yes, err := this.Ui.Ask(fmt.Sprintf("confirm to remove cluster[%s] consumer group: %s? [Y/n]",
					zkcluster.Name(), group))
				swallow(err)

				if strings.ToLower(yes) == "n" {
					this.Ui.Info(fmt.Sprintf("%s skipped", group))
					continue
				}
			} else {
				yes, err := this.Ui.Ask(fmt.Sprintf("confirm to remove cluster[%s] consumer group: %s? [y/N]",
					zkcluster.Name(), group))
				swallow(err)

				if strings.ToLower(yes) != "y" {
					this.Ui.Info(fmt.Sprintf("%s skipped", group))
					continue
				}
			}

			// do delete this consumer group
			zkzone.DeleteRecursive(zkcluster.ConsumerGroupRoot(group))
			this.Ui.Info(fmt.Sprintf("%s deleted", group))
		}
	})
}