Elasticsearch集群的简单搭建
环境说明：服务器（系统版本 centos7）
elasticsearch版本: elasticsearch-6.2.2
elasticsearch目录: /home/soft/
192.168.33.10master
192.168.33.11master data
192.168.33.12master data
一、创建es运行帐号 【三台机器都统一用户为es】
useradd es
passwd es
二、创建数据目录与日志目录【三台机器都一样】
mkdir -p /home/soft/elasticsearch-6.2.2/data/data/
mkdir -p /home/soft/elasticsearch-6.2.2/data/logs/
三、修改目录权限[三台机器都一样]
chown -R es:es /home/soft/elasticsearch-6.2.2
四、修改配置信息
一.192.168.33.10 配置信息:
cluster.name: my-application
node.name: node-192-168-33-10
path.data: /home/soft/elasticsearch-6.2.2/esData/data
path.logs: /home/soft/elasticsearch-6.2.2/esData/logs
bootstrap.memory_lock: false
bootstrap.system_call_filter: false
network.host: 192.168.33.10
http.port: 9200
discovery.zen.ping.unicast.hosts: ["192.168.33.10:9300","192.168.33.11:9300","192.168.33.12:9300"]
discovery.zen.minimum_master_nodes: 2
gateway.recover_after_nodes: 3
node.master: true
node.data: false
node.ingest: false
search.remote.connect: false
二、192.168.33.11 配置信息:
cluster.name: my-application
**node.name: node-192-168-33-11**
path.data: /home/soft/elasticsearch-6.2.2/esData/data/
path.logs: /home/soft/elasticsearch-6.2.2/esData/logs/
bootstrap.memory_lock: false
bootstrap.system_call_filter: false
**network.host: 192.168.33.11**
http.port: 9200
discovery.zen.ping.unicast.hosts: ["192.168.33.10:9300","192.168.33.11:9300","192.168.33.12:9300"]
discovery.zen.minimum_master_nodes: 2
gateway.recover_after_nodes: 3
node.master: true
** node.data: true**
node.ingest: false
search.remote.connect: false
三、192.168.33.12 配置信息
cluster.name: my-application
**node.name: node-12**
path.data: /home/soft/elasticsearch-6.2.2/esData/data/
path.logs: /home/soft/elasticsearch-6.2.2/esData/logs/
bootstrap.memory_lock: false
bootstrap.system_call_filter: false
** network.host: 192.168.33.12**
http.port: 9200
discovery.zen.ping.unicast.hosts: ["192.168.33.10:9300","192.168.33.11:9300","192.168.33.12:9300"]
discovery.zen.minimum_master_nodes: 2
gateway.recover_after_nodes: 3
node.master: true
node.data: true
node.ingest: false
search.remote.connect: false
四，用es用户的身份启动elasticsearch-6.2.2 [三台机器]
./bin/elasticsearch
启动成功之后，用CURL 请求测试集群是否搭建成功。
curl http://192.168.33.11:9200/_cat/nodes?v
http://i2.运维网.com/images/blog/201803/02/44cea8d244a81f3373f362259dc8da56.png
此时，一个简单的集群已经搭建成功，现在是node-12为master节点。
说明：
3台机器的cluster.name值必须一样，node.name值必须不一样。
在启动过程中遇到的问题列表：
[*]http://i2.运维网.com/images/blog/201803/02/9170d10c37bf3678dff5e71b3a1ec4e5.png
解决办法：
vim/etc/security/limits.conf,新加两行：
es soft nofile 65536
es hard nofile65536
es soft nproc4096
es hard nproc4096
[*]http://i2.运维网.com/images/blog/201803/02/9936c7b37efa2fc1535748e51f69ceee.png
解决办法：
discovery.zen.ping.unicast.hosts配置信息时把端口加上
bootstrap.memory_lock: false
bootstrap.system_call_filter: false
3.http://i2.运维网.com/images/blog/201803/07/3b2cf9c11c23ec8a1a0c7d8c30c9fdfb.png
解决办法 : su root
vim /etc/security/limits.d/90-nproc.conf
[*]soft nproc 4096
4.http://i2.运维网.com/images/blog/201803/07/e51391b50cc39ced7ba0357a78737931.png
解决办法：
vim /etc/sysctl.conf
添加: vm.max_map_count=655360
sysctl -p
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