Apache Zookeeper Input Plugin

This plugin collects variables from Zookeeper instances using the mntr command.

[!NOTE] If the Prometheus Metric provider is enabled in Zookeeper use the prometheus plugin instead with http://<ip>:7000/metrics.

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Global configuration options

Plugins support additional global and plugin configuration settings for tasks such as modifying metrics, tags, and fields, creating aliases, and configuring plugin ordering. See CONFIGURATION.md for more details.

Configuration

toml

# Reads 'mntr' stats from one or many zookeeper servers
[[inputs.zookeeper]]
  ## An array of address to gather stats about. Specify an ip or hostname
  ## with port. ie localhost:2181, 10.0.0.1:2181, etc.

  ## If no servers are specified, then localhost is used as the host.
  ## If no port is specified, 2181 is used
  servers = [":2181"]

  ## Timeout for metric collections from all servers.  Minimum timeout is "1s".
  # timeout = "5s"

  ## Float Parsing - the initial implementation forced any value unable to be
  ## parsed as an int to be a string. Setting this to "float" will attempt to
  ## parse float values as floats and not strings. This would break existing
  ## metrics and may cause issues if a value switches between a float and int.
  # parse_floats = "string"

  ## Optional TLS Config
  ## Set to true/false to enforce TLS being enabled/disabled. If not set,
  ## enable TLS only if any of the other options are specified.
  # tls_enable =
  ## Trusted root certificates for server
  # tls_ca = "/path/to/cafile"
  ## Used for TLS client certificate authentication
  # tls_cert = "/path/to/certfile"
  ## Used for TLS client certificate authentication
  # tls_key = "/path/to/keyfile"
  ## Password for the key file if it is encrypted
  # tls_key_pwd = ""
  ## Send the specified TLS server name via SNI
  # tls_server_name = "kubernetes.example.com"
  ## Minimal TLS version to accept by the client
  # tls_min_version = "TLS12"
  ## List of ciphers to accept, by default all secure ciphers will be accepted
  ## See https://pkg.go.dev/crypto/tls#pkg-constants for supported values.
  ## Use "all", "secure" and "insecure" to add all support ciphers, secure
  ## suites or insecure suites respectively.
  # tls_cipher_suites = ["secure"]
  ## Renegotiation method, "never", "once" or "freely"
  # tls_renegotiation_method = "never"
  ## Use TLS but skip chain & host verification
  # insecure_skip_verify = false

Troubleshooting

If you have any issues please check the direct Zookeeper output using netcat:

$ echo mntr | nc localhost 2181
zk_version      3.4.9-3--1, built on Thu, 01 Jun 2017 16:26:44 -0700
zk_avg_latency  0
zk_max_latency  0
zk_min_latency  0
zk_packets_received     8
zk_packets_sent 7
zk_num_alive_connections        1
zk_outstanding_requests 0
zk_server_state standalone
zk_znode_count  129
zk_watch_count  0
zk_ephemerals_count     0
zk_approximate_data_size        10044
zk_open_file_descriptor_count   44
zk_max_file_descriptor_count    4096

Metrics

Exact field names are based on Zookeeper response and may vary between configuration, platform, and version.

zookeeper
- tags:
  - server
  - port
  - state
- fields:
  - approximate_data_size (integer)
  - avg_latency (integer)
  - ephemerals_count (integer)
  - max_file_descriptor_count (integer)
  - max_latency (integer)
  - min_latency (integer)
  - num_alive_connections (integer)
  - open_file_descriptor_count (integer)
  - outstanding_requests (integer)
  - packets_received (integer)
  - packets_sent (integer)
  - version (string)
  - watch_count (integer)
  - znode_count (integer)
  - followers (integer, leader only)
  - synced_followers (integer, leader only)
  - pending_syncs (integer, leader only)

Example Output

text

zookeeper,server=localhost,port=2181,state=standalone ephemerals_count=0i,approximate_data_size=10044i,open_file_descriptor_count=44i,max_latency=0i,packets_received=7i,outstanding_requests=0i,znode_count=129i,max_file_descriptor_count=4096i,version="3.4.9-3--1",avg_latency=0i,packets_sent=6i,num_alive_connections=1i,watch_count=0i,min_latency=0i 1522351112000000000