docker-compose安裝elasticsearch集羣

文件目錄:

一、編寫docker-compose文件

version: '3'
services:
     es-master:
       image:  elasticsearch:6.4.3
       container_name: es-master
       restart: always
       volumes:
         - ./master/data:/usr/share/elasticsearch/data:rw
         - ./master/conf/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml
         - ./master/logs:/user/share/elasticsearch/logs:rw
       ports:
         - "9200:9200"
         - "9300:9300"

     es-node1:
       image:  elasticsearch:6.4.3
       container_name: es-node1
       restart: always
       volumes:
         - ./node1/data:/usr/share/elasticsearch/data:rw
         - ./node1/conf/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml
         - ./node1/logs:/user/share/elasticsearch/logs:rw
     es-node2:
       image:  elasticsearch:6.4.3
       container_name: es-node2
       restart: always
       volumes:
         - ./node2/data:/usr/share/elasticsearch/data:rw
         - ./node2/conf/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml
         - ./node2/logs:/user/share/elasticsearch/logs:rw
     es-head:
       image: tobias74/elasticsearch-head:6
       container_name: es-head
       restart: always
       ports:
       - "9100:9100"

es-master：master節點，肯定分片位置，索引的新增、刪除請求分配

es-node1：分片的 CRUD，以及搜索和整合操做

es-node2：分片的 CRUD，以及搜索和整合操做

es-head：es的一個插件，目前官方版本只支持5.0。能夠瀏覽和查看數據，能夠類比於navcate相對於mysql的做用。

二、編寫yml配置文件

(1) master配置文件

bootstrap.memory_lock: false
cluster.name: "es-cluster"
node.name: es-master
node.master: true
node.data: false
network.host: 0.0.0.0
http.port: 9200
transport.tcp.port: 9300
discovery.zen.ping.unicast.hosts: *.*.*.*:9300, *.*.*.*:9301, *.*.*.*:9302
discovery.zen.minimum_master_nodes: 1

path.logs: /usr/share/elasticsearch/logs
http.cors.enabled: true
http.cors.allow-origin: "*"
xpack.security.audit.enabled: true            

http.cors.enabled: true http.cors.allow-origin: "*"
上面的配置是爲了使es-head能鏈接到es集羣

(2) node配置文件

cluster.name: "es-cluster"
node.name: node2
node.master: false
node.data: true
network.host: 0.0.0.0
http.port: 9202
transport.tcp.port: 9302
discovery.zen.ping.unicast.hosts: *.*.*.*:9300,  *.*.*.*:9301,  *.*.*.*:9302

path.logs: /usr/share/elasticsearch/logs

 node1 的配置和node2的配置基本一致

三、執行命令

docker-compose up

四、ES-HEAD訪問

實線部分爲主分片，虛線部分爲副本分片。  上圖5個主分片和5個副本分片。 建立索引時候能夠制定主分片和副本分片的個數， 默認狀況下 5個主分片。1個副本分片（即每一個主分片一個副本分片）

五、相關問題整理

  (1)  目錄無限問題

       

      相關目錄上執行 chown 1000:1000 data

(2) 啓動失敗問題

      

     對應機器上執行  sudo sysctl -w vm.max_map_count=262144