docker安装ElasticSearch-1

编写docker-compose.yml

    version: '3' services:  # elasticsearch  elasticsearch:
        image: elasticsearch:7.5.0
        container_name: elasticsearch # docker启动后的名称
        privileged: true
        # restart: always  #出现异常自动重启
        ports:
          - 9200:9200
          - 9300:9300
        environment:
          cluster.name: elasticsearch  # es 名称
          ES_JAVA_OPTS: "-Xmx512m -Xms512m"
        volumes:
          - ./elasticsearch/plugins:/usr/share/elasticsearch/plugins

启动

docker-compose up

启动出现错误，提示虚拟内存设置过低

elasticsearch    | ERROR: [1] bootstrap checks failed
elasticsearch    | [1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
elasticsearch    | [2020-01-28T04:57:00,139][INFO ][o.e.n.Node              ] [5jRVKcB] stopping ...
elasticsearch    | [2020-01-28T04:57:00,206][INFO ][o.e.n.Node              ] [5jRVKcB] stopped
elasticsearch    | [2020-01-28T04:57:00,206][INFO ][o.e.n.Node              ] [5jRVKcB] closing ...
elasticsearch    | [2020-01-28T04:57:00,230][INFO ][o.e.n.Node              ] [5jRVKcB] closed
elasticsearch    | [2020-01-28T04:57:00,232][INFO ][o.e.x.m.p.NativeController] [5jRVKcB] Native controller process has stopped - no new native processes can be started
elasticsearch exited with code 78

查看max_map_count

cat /proc/sys/vm/max_map_count

65530

设置max_map_count

[root@wang ElasticSearch]# sysctl -w vm.max_map_count=262144

vm.max_map_count = 262144

再次启动

提示

elasticsearch    | ERROR: [1] bootstrap checks failed

elasticsearch    | [1]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured

解决：

在docker-compose.yml的environment添加

discovery.type: single-node

再次启动，正常

访问http://49.235.47.130:9200

{
  "name" : "5jRVKcB",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "FgMWVTfCTjazmef9TQqpqA",
  "version" : {
    "number" : "6.8.6",
    "build_flavor" : "default",
    "build_type" : "docker",
    "build_hash" : "3d9f765",
    "build_date" : "2019-12-13T17:11:52.013738Z",
    "build_snapshot" : false,
    "lucene_version" : "7.7.2",
    "minimum_wire_compatibility_version" : "5.6.0",
    "minimum_index_compatibility_version" : "5.0.0"
  },
  "tagline" : "You Know, for Search"
}

安装成功

完整的docker-compose.yml

    version: '3'

    services:

      # elasticsearch

      elasticsearch:

        image: elasticsearch:7.5.0

        container_name: elasticsearch # docker启动后的名称

        privileged: true

        # restart: always  #出现异常自动重启

        ports:

          - 9200:9200

          - 9300:9300

        environment:

          cluster.name: elasticsearch  # es 名称

          ES_JAVA_OPTS: "-Xmx512m -Xms512m"

          discovery.type: single-node

        volumes:

          - ./elasticsearch/plugins:/usr/share/elasticsearch/plugins

参考文档：

https://www.elastic.co/guide/en/elasticsearch/reference/7.0/docker.html#docker-cli-run-prod-mode