es-02-elasticsearch安装及遇到的问题

最近因为工作需要, 又使用到了es, 版本已经从当年的2.4 更新到了6.3

基本上解压即用, 

elasticsearch 5.x 版本, 在 centos6下, 很多性能不能够发挥, 建议 centos 7+ 使用, 需要jdk1.8+

1, es

修改配置文件, 注意, 不能使用root用户

集群通过cluster.name进行发现

[root@10-110-122-172 config]# cat elasticsearch.yml | grep -v ^# | grep  -v ^$
cluster.name: my-es
node.name: node-1
path.data: /data/elastic/data
path.logs: /data/elastic/logs
network.host: 10.110.122.172
http.port: 9200
bootstrap.system_call_filter: false
## 非常重要, 防脑裂配置, 服务发现, 哪些可以成为 master
discovery.zen.ping.unicast.hosts: ["node1", "node2", "node3"]
## 有权利成为master的数量, 
discovery.zen.minimum_master_nodes:3

分发, 并且分别启动

./bin/elasticsearch &

后台启动

./bin/elasticsearch -d -p pid

使用nohup启动不了, 原因未寻找

nohup ./bin/elasticsearch 1>/dev/null 2>&1 &

停止

kill -SIGTERM 15516

可能会出错, 需要修改kernel的内容

https://github.com/DimonHo/DH_Note/issues/3

1), vi /etc/security/limits.conf

用户可创建文件数太少

* soft nofile 65536
* hard nofile 131072
* soft nproc 2048
* hard nproc 4096

查看: ulimit -Hn

2), vi /etc/security/limits.d/90-nproc.conf

* soft nproc 2048

3), vi /etc/sysctl.conf

虚拟内存大小

vm.max_map_count=655360

查看: sudo sysctl -p

线上环境安装es需要注意的问题: 

https://www.elastic.co/guide/cn/kibana/current/production.html

2, docker 启动 elasticsearch

未实验..

1), pull

docker pull docker.elastic.co/elasticsearch/elasticsearch:6.3.1

2), 启动

docker run -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" docker.elastic.co/elasticsearch/elasticsearch:6.3.1

4, 使用docker-compose 启动集群

version: '2.2'
services:
  elasticsearch:
    image: docker.elastic.co/elasticsearch/elasticsearch:6.3.1
    container_name: elasticsearch
    environment:
      - cluster.name=docker-cluster
      - bootstrap.memory_lock=true
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
    ulimits:
      memlock:
        soft: -1
        hard: -1
    volumes:
      - esdata1:/usr/share/elasticsearch/data
    ports:
      - 9200:9200
    networks:
      - esnet
  elasticsearch2:
    image: docker.elastic.co/elasticsearch/elasticsearch:6.3.1
    container_name: elasticsearch2
    environment:
      - cluster.name=docker-cluster
      - bootstrap.memory_lock=true
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
      - "discovery.zen.ping.unicast.hosts=elasticsearch"
    ulimits:
      memlock:
        soft: -1
        hard: -1
    volumes:
      - esdata2:/usr/share/elasticsearch/data
    networks:
      - esnet

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

networks:
  esnet:

启动

docker-compose up

遇到的问题:  https://github.com/DimonHo/DH_Note/issues/3