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1. Centos 7.x elasticsearch 6.4集群安装配置

Centos 7.x elasticsearch 6.4集群安装配置

系统配置

操作系统：Centos 7.5
jdk： 1.8
elasticsearch： 6.4.0

节点

node-01: 172.16.0.31
node-02: 172.16.0.33
node-03: 172.16.0.35

jdk 下载安装

jdk安装推荐使用rpm进行安装，rpm包可通过oracle官网进行下载
https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

下载完成之后上传到所有的节点服务器上。

jdk 安装

1	rpm -iv jdk-8u192-linux-x64.rpm

检验jdk是否安装成功

1 2	[root@node-01 ~]# javac -version javac 1.8.0_192

elasticsearch 下载安装

elasticsearch也是通过官网直接下载rpm，也可以通过添加官网的yum源进行安装的

[elasticsearch-6.x]
name=Elasticsearch repository for 6.x packages
baseurl=https://artifacts.elastic.co/packages/6.x/yum
gpgcheck=1
gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticsearch
enabled=1
autorefresh=1
type=rpm-md

es 安装

1	rpm -iv elasticsearch-6.4.2.rpm

配置elasticsearch

elasticsearch通过rpm或yum的方式进行安装，配置文件都在/etc/elasticsearch目录下，默认的数据文件在/var/lib/elasticsearch,日志文件/var/lib/elasticsearch

修改elasticsearch.yml

cluster.name: my-application
node.name: node-1
path.data: /var/lib/elasticsearch
path.logs: /var/log/elasticsearch
network.host: 0.0.0.0
discovery.zen.ping.unicast.hosts: ["172.16.0.31", "172.16.0.33","172.16.0.35"]

指令	值	备注
cluster.name	my-application	指定集群的名字，在集群中集群名一定要相同
node.name	node-1	当前节点的名字
path.data	/var/lib/elasticsearch	es数据存储路径，`更改目录的属主属组一定要和es的启动用户致`
path.log	/var/log/elasticsearch	日志文件
network.host	0.0.0.0	当前节点监控的地址，默认的为127.0.0.1
discovery.zen.ping.unicast.hosts	[“172.16.0.31”, “172.16.0.33”,”172.16.0.35”]	设置集群中master节点的初始列表，可以通过这些节点来自动发现新加入集群的节点，默认使用为9300端口
node.master	true	指定该节点是否有资格被选举成为node，默认是true，es是默认集群中的第一台机器为master，如果这台机挂了就会重新选举master
node.data	true	指定该节点是否存储索引数据，默认为true
transport.tcp.port	9300	设置节点间交互的tcp端口，默认是9300

启动es服务

1	systemctl start elasticsearch

查看服务端口

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[root@node-01 ~]# netstat  -ntlp|grep java
tcp6       0      0 :::9200                 :::*                    LISTEN      14094/java          
tcp6       0      0 :::9300                 :::*                    LISTEN      14094/java

查看集群信息

在任意一个节点操作都可以的，使用的是Linux的 curl命令

查看集群状态

[root@node-01 ~]# curl  -XGET "http://127.0.0.1:9200/_cat/nodes"
172.16.0.31 13 97 1 0.00 0.06 0.08 mdi * node-1  # 带 * 表示master
172.16.0.35 15 95 0 0.00 0.03 0.05 mdi - node-3
172.16.0.33 12 95 1 0.00 0.01 0.05 mdi - node-2

详细的输出

[root@node-01 ~]# curl  -XGET "http://127.0.0.1:9200/_cat/nodes?v"
ip          heap.percent ram.percent cpu load_1m load_5m load_15m node.role master name
172.16.0.31           13          97   1    0.00    0.05     0.08 mdi       *      node-1
172.16.0.35            8          95   0    0.00    0.03     0.05 mdi       -      node-3
172.16.0.33           12          95   0    0.00    0.01     0.05 mdi       -      node-2

[root@node-01 ~]# curl  -XGET "http://127.0.0.1:9200/_cluster/state/nodes?pretty"
{
  "cluster_name" : "my-application",
  "compressed_size_in_bytes" : 9661,
  "cluster_uuid" : "_mkN1ppVQlukvMX39Wfn4g",
  "nodes" : {
    "7W98TtIHSxOyhR0cE53P5w" : {
      "name" : "node-1",
      "ephemeral_id" : "xv-mqOGIRD-J_FlJOYpI8g",
      "transport_address" : "172.16.0.31:9300",
      "attributes" : {
        "ml.machine_memory" : "3974569984",
        "xpack.installed" : "true",
        "ml.max_open_jobs" : "20",
        "ml.enabled" : "true"
      }
    },
    "HV2tsTyeR0qUVnBlHlrBEQ" : {
      "name" : "node-3",
      "ephemeral_id" : "5cZ2EeTdRimpwd1s_lAL9w",
      "transport_address" : "172.16.0.35:9300",
      "attributes" : {
        "ml.machine_memory" : "1928286208",
        "ml.max_open_jobs" : "20",
        "xpack.installed" : "true",
        "ml.enabled" : "true"
      }
    },
    "HWg6DQFFRRuMHz0cPDAqjg" : {
      "name" : "node-2",
      "ephemeral_id" : "QQXlI5OXQQK3gNIl3qxMmQ",
      "transport_address" : "172.16.0.33:9300",
      "attributes" : {
        "ml.machine_memory" : "1928286208",
        "ml.max_open_jobs" : "20",
        "xpack.installed" : "true",
        "ml.enabled" : "true"
      }
    }
  }
}

查看集群中master

[root@node-01 ~]# curl  -XGET "http://127.0.0.1:9200/_cluster/state/master_node?pretty"
{
  "cluster_name" : "my-application",
  "compressed_size_in_bytes" : 9661,
  "cluster_uuid" : "_mkN1ppVQlukvMX39Wfn4g",
  "master_node" : "7W98TtIHSxOyhR0cE53P5w"
}

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[root@node-01 ~]# curl  -XGET "http://127.0.0.1:9200/_cat/master?v"
id                     host        ip          node
7W98TtIHSxOyhR0cE53P5w 172.16.0.31 172.16.0.31 node-1

查询集群的健康状态

一共三种状态：green、yellow，red；其中green表示健康

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[root@node-01 ~]# curl  -XGET "http://127.0.0.1:9200/_cat/health?v"
epoch      timestamp cluster        status node.total node.data shards pri relo init unassign pending_tasks max_task_wait_time active_shards_percent
1540538748 15:25:48  my-application green           3         3      0   0    0    0        0             0                  -                100.0%

[root@node-01 ~]# curl  -XGET "http://127.0.0.1:9200/_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
}

排错

可根据/var/log/message日志文件输出来定位问题
根据/var/log/elasticsearch/集群名.log来定位问题

参考

https://www.cnblogs.com/liuchuanfeng/articles/7059268.html
https://www.cnblogs.com/kevingrace/p/7693422.html

狼叔

Centos 7.x es集群安装