使用elasticsearch7.3版本在一台主机上部署多个实例组建集群配置步骤测试其他部署方式

系统：centos 7.4 x64
主机ip:192.168.0.160
软件包：elasticsearch-7.3.0-linux-x86_64.tar.gz

配置步骤

vim /etc/security/limits.conf
* soft nofile 65537
* hard nofile 65537
* soft nproc 65537
* hard nproc 65537

vim /etc/sysctl.conf
vm.max_map_count = 262144
net.core.somaxconn = 65535
net.ipv4.ip_forward = 1

cd /usr/local/src
tar -zxv -f elasticsearch-7.3.0-linux-x86_64.tar.gz -C /usr/local/
cd /usr/local/
cp elasticsearch-7.3.0 elasticsearch-7.3.0_node1
cp elasticsearch-7.3.0 elasticsearch-7.3.0_node2
cp elasticsearch-7.3.0 elasticsearch-7.3.0_node3
useradd elastic
chown -R elastic:elastic elasticsearch-7.3.0_node1
chown -R elastic:elastic elasticsearch-7.3.0_node2
chown -R elastic:elastic elasticsearch-7.3.0_node3

# 如下是每个节点的配置文件内容
# 1
cluster.name: my-application
node.name: node-1

# 主节点
node.master: true
# 数据节点
node.data: true 

network.host: 192.168.0.160
http.port: 9200
transport.port: 9300

discovery.seed_hosts: ["192.168.0.160:9300", "192.168.0.160:9301","192.168.0.160:9302"]
cluster.initial_master_nodes: ["node-1"] # 确保当前节点是主节点

http.cors.enabled: true
http.cors.allow-origin: "*"


# 2
cluster.name: my-application
node.name: node-2

node.master: false
node.data: true 

network.host: 192.168.0.160
http.port: 9201
transport.port: 9301

discovery.seed_hosts: ["192.168.0.160:9300", "192.168.0.160:9301","192.168.0.160:9302"]
cluster.initial_master_nodes: ["node-1", "node-2","node3"]

http.cors.enabled: true
http.cors.allow-origin: "*"

# 3
cluster.name: my-application
node.name: node-3

node.master: false
node.data: true 

network.host: 192.168.0.160
http.port: 9202
transport.port: 9302

discovery.seed_hosts: ["192.168.0.160:9300", "192.168.0.160:9301","192.168.0.160:9302"]
cluster.initial_master_nodes: ["node-1","node-2","node-3"]

http.cors.enabled: true
http.cors.allow-origin: "*"

若报错说找不到主节点，可以先启动主节点，等主节点集群建立后，再启动从节点，观察从节点日志输出，确保从节点加入集群。

分别启动的话需要先切换到elastic普通用户，然后运行/usr/local/elasticsearch-7.3.0-cluster-node1/bin/elasticsearch

可以先分别启动查看状态，待配置无误后再用脚本启动

启动脚本

#!/bin/bash

/usr/bin/su - elastic -c '/usr/local/elasticsearch-7.3.0-cluster-node1/bin/elasticsearch -p /tmp/elasticsearch_9200_pid -d'
/usr/bin/su - elastic -c '/usr/local/elasticsearch-7.3.0-cluster-node2/bin/elasticsearch -p /tmp/elasticsearch_9201_pid -d'
/usr/bin/su - elastic -c '/usr/local/elasticsearch-7.3.0-cluster-node3/bin/elasticsearch -p /tmp/elasticsearch_9202_pid -d'

关闭脚本

#!/bin/bash

kill -9 `ps -u elastic|awk '{print $1}'`

测试

查看集群主从分配

http://192.168.0.160:9200/_cat/nodes?v

ip            heap.percent ram.percent cpu load_1m load_5m load_15m node.role master name
192.168.0.160           35          97   0    0.04    0.23     0.22 di        -      node-3
192.168.0.160           15          97   0    0.04    0.23     0.22 dim       *      node-1
192.168.0.160           31          97   0    0.04    0.23     0.22 di        -      node-2

查看集群状态

http://192.168.0.160:9200/_cluster/health?pretty

{
  "cluster_name": "my-application",
  "status": "green",
  "timed_out": false,
  "number_of_nodes": 3,
  "number_of_data_nodes": 3,
  "active_primary_shards": 0,
  "active_shards": 0,
  "relocating_shards": 0,
  "initializing_shards": 0,
  "unassigned_shards": 0,
  "delayed_unassigned_shards": 0,
  "number_of_pending_tasks": 0,
  "number_of_in_flight_fetch": 0,
  "task_max_waiting_in_queue_millis": 0,
  "active_shards_percent_as_number": 100.0
}

其他部署方式

还有一种部署方式是创建不同的配置文件路径来进行启动，比较麻烦就不实验了