参考文献

cat命令

  • 健康检查

    • /_cat/health?v

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      epoch      timestamp cluster       status node.total node.data shards pri relo init unassign pending_tasks max_task_wait_time active_shards_percent
      1628751491 06:58:11  local-cluster yellow          1         1      3   3    0    0        2             0                  -                 60.0%

  • 节点分片数量查询

    • /_cat/allocation?v

    • 查询每个节点上分配的分片（shard）的数量和每个分片（shard）所使用的硬盘容量

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      shards disk.indices disk.used disk.avail disk.total disk.percent host      ip        node
           3       40.6mb   108.8gb    817.4gb    926.3gb           11 127.0.0.1 127.0.0.1 local-es
           2                                                                               UNASSIGNED

  • 节点统计

    • /_cat/nodes?v
    • 显示当前es集群节点的状况

  • 文档数量查询

    • /_cat/count?v

  • 查询master节点

    • /_cat/master?v
    • 用于显示master节点ID，绑定IP地址，节点名称

  • 查询节点自定义属性

    • /_cat/nodeattrs?v

  • 执行任务查询

    • /_cat/pending_tasks?v

  • 索引分片恢复查询

    • /_cat/recovery?v

  • 节点线程查询

    • /_cat/thread_pool

  • 索引所在分片查询

    • /_cat/shards

Elasticsearch设置用户名和密码

  • 版本号: 7.14.1

  • 需要在配置文件中开启x-pack验证,修改config目录下面的elasticsearch.yml文件,添加以下内容:

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    xpack.security.enabled: true
    xpack.license.self_generated.type: basic
    xpack.security.transport.ssl.enabled: true

  • 设置密码,两种模式:auto和interactive

    • auto:自动,使用该模式后,会自动生成密码并打印在控制台上

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      ./bin/elasticsearch-setup-passwords auto

    • interactive: 交互模式.

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      ./bin/elasticsearch-setup-passwords interactive
      Initiating the setup of passwords for reserved users elastic,kibana,logstash_system,beats_system.
      You will be prompted to enter passwords as the process progresses.
      Please confirm that you would like to continue [y/N]y
      Enter password for [elastic]: 
      Enter password for [elastic]: 
      Reenter password for [elastic]: 
      Enter password for [elastic]: 
      Reenter password for [elastic]: 
      Enter password for [kibana]: 
      Reenter password for [kibana]: 
      Enter password for [logstash_system]: 
      Reenter password for [logstash_system]: 
      Enter password for [beats_system]: 
      Reenter password for [beats_system]: 
      Changed password for user [kibana]
      Changed password for user [logstash_system]
      Changed password for user [beats_system]
      Changed password for user [elastic]

  • 修改密码

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    curl -H "Content-Type:application/json" -XPOST -u elastic 'http://127.0.0.1:9200/_xpack/security/user/elastic/_password' -d '{ "password" : "123456" }'

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