chore: import upstream snapshot with attribution
This commit is contained in:
wehub-resource-sync
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---
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id: zookeeper
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title: Monitoring Zookeeper
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sidebar_label: Zookeeper Monitor
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keywords: [open source monitoring tool, open source zookeeper monitoring tool, monitoring zookeeper metrics]
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---
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> Collect and monitor the general performance Metrics of Zookeeper.
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## PreRequisites
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### Zookeeper four word command
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>
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> The current implementation scheme uses the four word command provided by zookeeper to collect Metrics.
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> Users need to add the four word command of zookeeper to the white list by themselves.
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Steps
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> 1.Find our zookeeper configuration file, which is usually zoo.cfg.
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>
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> 2.Add the following commands to the configuration file
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```shell
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# Add the required command to the white list
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4lw.commands.whitelist=stat, ruok, conf, isro
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# Add all commands to the white list
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4lw.commands.whitelist=*
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```
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> 3.Restart service
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```shell
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zkServer.sh restart
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```
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#### netcat protocol
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The current implementation scheme requires us to deploy the Linux server of zookeeper
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Command environment for installing netcat
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> netcat installation steps
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>
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> ```shell
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> yum install -y nc
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> ```
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If the terminal displays the following information, the installation is successful
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```shell
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Complete!
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```
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### Configuration parameter
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| Parameter name | Parameter help description |
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|---------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| Monitoring Host | Monitored IPV4, IPV6 or domain name. Note⚠️Without protocol header (eg: https://, http://) |
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| Monitoring name | Identify the name of this monitoring. The name needs to be unique |
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| Port | Port provided by Zookeeper. The default is 2181 |
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| Query timeout | Set the timeout of Zookeeper connection, unit: ms, default: 3000ms |
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| Username | User name of the Linux connection where Zookeeper is located |
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| Password | Password of the Linux connection where Zookeeper is located |
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| Collection interval | Interval time of monitor periodic data collection, unit: second, and the minimum interval that can be set is 30 seconds |
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| Whether to detect | Whether to detect and check the availability of monitoring before adding monitoring. Adding and modifying operations will continue only after the detection is successful |
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| Description remarks | For more information about identifying and describing this monitoring, users can note information here |
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### Collection Metric
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#### Metric set：conf
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| Metric name | Metric unit | Metric help description |
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|-------------------|-------------|--------------------------------------------------------------------------------------------------------------------|
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| clientPort | none | Port |
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| dataDir | none | Data snapshot file directory. By default, 100000 operations generate a snapshot |
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| dataDirSize | kb | Data snapshot file size |
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| dataLogDir | none | Transaction log file directory, production environment on a separate disk |
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| dataLogSize | kb | Transaction log file size |
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| tickTime | ms | Time interval between servers or between clients and servers to maintain heartbeat |
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| minSessionTimeout | ms | Minimum session timeout. Heartbeat timex2. The specified time is less than this time, which is used by default |
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| maxSessionTimeout | ms | Maximum session timeout. Heartbeat timex20. The specified time is greater than this time, which is used by default |
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| serverId | none | Server id |
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#### Metric set：stats
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| Metric name | Metric unit | Metric help description |
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|-------------------------------|-------------|------------------------------------|
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| zk_version | none | Server version |
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| zk_server_state | none | Server role |
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| zk_num_alive_connections | number | Number of connections |
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| zk_avg_latency | ms | Average latency |
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| zk_outstanding_requests | number | Number of outstanding requests |
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| zk_znode_count | number | Number of znode |
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| zk_packets_sent | number | Number of packets sent |
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| zk_packets_received | number | Number of packets received |
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| zk_watch_count | number | Number of watch |
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| zk_max_file_descriptor_count | number | Maximum number of file descriptors |
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| zk_approximate_data_size | kb | data size |
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| zk_open_file_descriptor_count | number | Number of open file descriptors |
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| zk_max_latency | ms | Max latency |
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| zk_ephemerals_count | number | Number of ephemeral nodes |
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| zk_min_latency | ms | Min latency |
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#### Metric set：envi
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| Metric Name | Metric Unit | Metric help description |
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|-------------------|-------------|-------------------------------|
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| zk_version | none | ZooKeeper version |
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| hostname | none | Hostname |
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| java_version | none | Java version |
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| java_vendor | none | Java vendor |
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| java_home | none | Java home directory |
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| java_class_path | none | Java class path |
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| java_library_path | none | Java library path |
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| java_io_tmpdir | none | Java temporary directory |
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| java_compiler | none | Java compiler |
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| os_name | none | Operating system name |
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| os_arch | none | Operating system architecture |
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| os_version | none | Operating system version |
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| user_name | none | Username |
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| user_home | none | User home directory |
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| user_dir | none | User current directory |
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