Zookeeper beats module is unable to parse some fields on ZK 3.6 and ZK 3.7 mntr responses

[pfcoperez]

Problem coordinates:

• Beats version: 7.17.1
• ZooKeeper versions >3.6
• Steps to Reproduce:

1. Set up Zookeeper module, enable mntr metrics.
2. Main the configuration point to a 3.7 ZooKeeper ensemble.
3. All the mntr fields that used to be integers but are now float are not ingested anymore.

The problem is present in the parsing code for the mntr responses from ZooKeeper:

beats/metricbeat/module/zookeeper/mntr/data.go

Lines 33 to 54 in 3d3452f

	var (
	// Matches first the variable name, second the param itself
	paramMatcher = regexp.MustCompile("([^\\s]+)\\s+(.*$)")
	schema = s.Schema{
	"version": c.Str("zk_version"),
	"latency": s.Object{
	"avg": c.Int("zk_avg_latency"),
	"min": c.Int("zk_min_latency"),
	"max": c.Int("zk_max_latency"),
	},
	"packets": s.Object{
	"received": c.Int("zk_packets_received"),
	"sent": c.Int("zk_packets_sent"),
	},
	"num_alive_connections": c.Int("zk_num_alive_connections"),
	"outstanding_requests": c.Int("zk_outstanding_requests"),
	"server_state": c.Str("zk_server_state"),
	"znode_count": c.Int("zk_znode_count"),
	"watch_count": c.Int("zk_watch_count"),
	"ephemerals_count": c.Int("zk_ephemerals_count"),
	"approximate_data_size": c.Int("zk_approximate_data_size"),
	}

I am working on a patch to make this module compatible with recent ZooKeeper versions.

[elasticmachine]

Pinging @elastic/integrations (Team:Integrations)