docker-compose.yml

version: '2.2'
services:

    nginx:
        image: nginx
        container_name: nginx
        restart: always
        ports:
            - "80:80"
            - "443:443"
            - "9200:9200"
        volumes:
            - /usr/share/zoneinfo/Asia/Shanghai:/etc/localtime:ro
            - /root/container/nginx/conf/:/etc/nginx/:ro
            - /root/container/nginx/log/:/var/log/nginx/
            - /root/container/nginx/nginx.pid:/var/run/nginx/nginx.pid
        networks:
            - esnet

    elasticsearch1:
        image: docker.elastic.co/elasticsearch/elasticsearch:6.5.0
        container_name: elasticsearch1
        environment:
            - cluster.name=docker-cluster
            - bootstrap.memory_lock=true
            - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
        ulimits:
            memlock:
                soft: -1
                hard: -1
        volumes:
            - /usr/share/zoneinfo/Asia/Shanghai:/etc/localtime:ro
            - /root/container/elasticsearch1/config/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml:ro
            - esdata1:/usr/share/elasticsearch1/data
        ports:
            - 9201:9200
        networks:
            - esnet

    elasticsearch2:
        image: docker.elastic.co/elasticsearch/elasticsearch:6.5.0
        container_name: elasticsearch2
        environment:
            - cluster.name=docker-cluster
            - bootstrap.memory_lock=true
            - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
        ulimits:
            memlock:
                soft: -1
                hard: -1
        volumes:
            - /usr/share/zoneinfo/Asia/Shanghai:/etc/localtime:ro
            - /root/container/elasticsearch2/config/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml:ro
            - esdata2:/usr/share/elasticsearch/data
        ports:
            - 9202:9200
        networks:
            - esnet

    elasticsearch3:
        image: docker.elastic.co/elasticsearch/elasticsearch:6.5.0
        container_name: elasticsearch3
        environment:
            - cluster.name=docker-cluster
            - bootstrap.memory_lock=true
            - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
        ulimits:
            memlock:
                soft: -1
                hard: -1
        volumes:
            - /usr/share/zoneinfo/Asia/Shanghai:/etc/localtime:ro
            - /root/container/elasticsearch3/config/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml:ro
            - esdata3:/usr/share/elasticsearch/data
        ports:
            - 9203:9200
        networks:
            - esnet

volumes:
    esdata1:
        driver: local
    esdata2:
        driver: local
    esdata3:
        driver: local

networks:
    esnet:

elasticsearch.yml for node1

cluster.name: "docker-cluster"

# minimum_master_nodes need to be explicitly set when bound on a public IP
# set to 1 to allow single node clusters
# Details: https://github.com/elastic/elasticsearch/pull/17288
discovery.zen.minimum_master_nodes: 2

#give your nodes a name (change node number from node to node).
node.name: "elasticsearch1"

#define node 1 as master-eligible:
#node.master: true

#define nodes 2 and 3 as data nodes:
#node.data: true

#enter the private IP and port of your node:
network.host: "elasticsearch1"
http.port: 9200

#detail the private IPs of your nodes:
discovery.zen.ping.unicast.hosts: ["elasticsearch1", "elasticsearch2","elasticsearch3"]

# To avoid swapping you can either disable all swapping (recommended if Elasticsearch is the only service running on the server), or you can use mlockall to lock the Elasticsearch process to RAM.
#bootstrap.mlockall: true

elasticsearch.yml for node2

cluster.name: "docker-cluster"

# minimum_master_nodes need to be explicitly set when bound on a public IP
# set to 1 to allow single node clusters
# Details: https://github.com/elastic/elasticsearch/pull/17288
discovery.zen.minimum_master_nodes: 2

#give your nodes a name (change node number from node to node).
node.name: "elasticsearch2"

#define node 1 as master-eligible:
#node.master: false

#define nodes 2 and 3 as data nodes:
#node.data: true

#enter the private IP and port of your node:
network.host: "elasticsearch2"
http.port: 9200

#detail the private IPs of your nodes:
discovery.zen.ping.unicast.hosts: ["elasticsearch1", "elasticsearch2","elasticsearch3"]

# To avoid swapping you can either disable all swapping (recommended if Elasticsearch is the only service running on the server), or you can use mlockall to lock the Elasticsearch process to RAM.
#bootstrap.mlockall: true

elasticsearch.yml for node3

cluster.name: "docker-cluster"

# minimum_master_nodes need to be explicitly set when bound on a public IP
# set to 1 to allow single node clusters
# Details: https://github.com/elastic/elasticsearch/pull/17288
discovery.zen.minimum_master_nodes: 2

#give your nodes a name (change node number from node to node).
node.name: "elasticsearch3"

#define node 1 as master-eligible:
#node.master: false

#define nodes 2 and 3 as data nodes:
#node.data: true

#enter the private IP and port of your node:
network.host: "elasticsearch3"
http.port: 9200

#detail the private IPs of your nodes:
discovery.zen.ping.unicast.hosts: ["elasticsearch1", "elasticsearch2","elasticsearch3"]

# To avoid swapping you can either disable all swapping (recommended if Elasticsearch is the only service running on the server), or you can use mlockall to lock the Elasticsearch process to RAM.
#bootstrap.mlockall: true

check status

# curl http://127.0.0.1:9200/_cat/health
1542783097 06:51:37 docker-cluster green 3 3 12 6 2 0 0 0 - 100.0%

Nginx load balancer to Elasticsearch

  • nginx.conf
# in the 'http' context
#proxy_cache_path /var/cache/nginx/cache keys_zone=elasticsearch:10m inactive=60m;

events {
    worker_connections  4096;  ## Default: 1024
}

http {
    upstream elasticsearch_cluster {
	server elasticsearch1:9200 ;
	server elasticsearch2:9200 ;
	server elasticsearch3:9200 ;
    }

    server {
	listen  9200;
	server_name _;


	location / {
	    proxy_pass http://elasticsearch_cluster;
	    proxy_http_version 1.1;
	    proxy_set_header Connection "Keep-Alive";
	    proxy_set_header Proxy-Connection "Keep-Alive";
	    client_max_body_size    16m;
	    proxy_send_timeout      10s;
	    proxy_read_timeout      60s;
	    proxy_set_header Connection "";
	}

    }
}