Docker安装elasticsearch 1：不用数据卷

• 0.注意事项
• 1.官方启动es（不推荐，没设置es内存大小）
• 2.docker stats查看容器占用状态
• 3.docker -e增加内存限制

es暴露的端口很多
es很占内存，默认1g
es的数据需要放到安全目录，要做数据挂载
es集群，需要docker网络

docker run -d --name elasticsearch -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" elasticsearch:7.6.2

curl查看是否启动成功

[root@localhost haokai]#  curl locallhost:9200
curl: (6) Could not resolve host: locallhost; Unknown error
[root@localhost haokai]#  curl localhost:9200
{
  "name" : "64353fa05644",
  "cluster_name" : "docker-cluster",
  "cluster_uuid" : "Lg4AuNSISjC_E3ztBBZbTg",
  "version" : {
    "number" : "7.6.2",
    "build_flavor" : "default",
    "build_type" : "docker",
    "build_hash" : "ef48eb35cf30adf4db14086e8aabd07ef6fb113f",
    "build_date" : "2020-03-26T06:34:37.794943Z",
    "build_snapshot" : false,
    "lucene_version" : "8.4.0",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}
[root@localhost haokai]#

这个命令也比较耗费内存，因为是实施刷新的，所以不看了要关掉

docker stats

ConTAINER ID   NAME            CPU %     MEM USAGE / LIMIT     MEM %     NET I/O          BLOCK I/O        PIDS
64353fa05644   elasticsearch   1.10%     777.7MiB / 1.777GiB   42.75%    656B / 0B        2.91GB / 108MB   46
533124d2559a   tomcat01        0.21%     110.9MiB / 1.777GiB   6.10%     16.5kB / 172kB   897MB / 30.3MB   36
aca793e8d0cc   nginx01         0.00%     2.387MiB / 1.777GiB   0.13%     7.3kB / 6.78kB   22.4MB / 0B      5

-e ES_JAVA_OPS=“Xms64m Xmx=128”

内存指定：最小64M，最大128M，看自己需要，一般不超过物理内存的50%。

docker run -d --name elasticsearch01 -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" -e ES_JAVA_OPTS="-Xms64m -Xmx=128m" elasticsearch:7.6.2