elasticsearch集群

本文准备搭建三节点 elasticsearch集群，elasticsearch版本：6.5.4，因此这里准备了三台 Linux CentOS 7机器，只需要简单通过Vmware克隆两台CentOS 7机器，并分别设置静态ip即可。

三台 CentOS 7分别启动elasticsearch

node-1
192.168.92.90:9200
node-2
192.168.92.91:9200
node-3
192.168.92.93:9200

并将三台Centos7主机名分别设置nodenode01，node02和node03，区别三台centos7机器

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1#node01主机名设置： 

2[elsearch@localhost ~]$ hostnamectl set-hostname node01

3node01

4[elsearch@node01 ~]$ ifconfig

5ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500

6        inet 192.168.92.90  netmask 255.255.255.0  broadcast 192.168.92.255

7        inet6 fe80::b889:1772:c306:ef8f  prefixlen 64  scopeid 0x20<link>

8        inet6 fe80::72e0:4da:118d:13d9  prefixlen 64  scopeid 0x20<link>

9        ether 00:0c:29:07:43:5a  txqueuelen 1000  (Ethernet)

10        RX packets 829  bytes 158380 (154.6 KiB)

11        RX errors 0  dropped 0  overruns 0  frame 0

12        TX packets 634  bytes 116833 (114.0 KiB)

13        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

14

15#node02主机名设置： 

16[elsearch@localhost ~]$ hostnamectl set-hostname node02

17node02

18[elsearch@node02 ~]$ ifconfig

19ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500

20        inet 192.168.92.91  netmask 255.255.255.0  broadcast 192.168.92.255

21        inet6 fe80::b889:1772:c306:ef8f  prefixlen 64  scopeid 0x20<link>

22        ether 00:0c:29:84:99:62  txqueuelen 1000  (Ethernet)

23        RX packets 2195  bytes 323930 (316.3 KiB)

24        RX errors 0  dropped 0  overruns 0  frame 0

25        TX packets 466  bytes 52037 (50.8 KiB)

26        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

27

28#node03主机名设置：

29[elsearch@localhost ~]$ hostnamectl set-hostname node03

30node03

31[elsearch@node03 ~]$ ifconfig

32ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500

33        inet 192.168.92.92  netmask 255.255.255.0  broadcast 192.168.92.255

34        inet6 fe80::22a3:7ced:1761:de8e  prefixlen 64  scopeid 0x20<link>

35        inet6 fe80::b889:1772:c306:ef8f  prefixlen 64  scopeid 0x20<link>

36        inet6 fe80::72e0:4da:118d:13d9  prefixlen 64  scopeid 0x20<link>

37        ether 00:0c:29:c9:f0:22  txqueuelen 1000  (Ethernet)

38        RX packets 859  bytes 141277 (137.9 KiB)

39        RX errors 0  dropped 0  overruns 0  frame 0

40        TX packets 619  bytes 147363 (143.9 KiB)

41        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

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下面在三台Centos7机器上对应的elasticsearch.yml配置集群

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1[elsearch@node01 elasticsearch-6.5.4]$ vim config/elasticsearch.yml

2#node01的配置： 

3cluster.name: es-itcast-cluster 

4node.name: node01 

5#设置node01为主节点

6node.master: true  

7node.data: true 

8network.host: 0.0.0.0

9http.port: 9200 

10discovery.zen.ping.unicast.hosts: ["192.168.92.90","192.168.92.91","192.168.92.92"] discovery.zen.minimum_master_nodes: 2 

11http.cors.enabled: true 

12http.cors.allow-origin: "*"

13

14[elsearch@node02 elasticsearch-6.5.4]$ vim config/elasticsearch.yml

15#node02的配置： 

16cluster.name: es-itcast-cluster 

17node.name: node02 

18node.master: true

19node.data: true 

20network.host: 0.0.0.0 

21http.port: 9200 

22discovery.zen.ping.unicast.hosts: ["192.168.92.90","192.168.92.91","192.168.92.92"]  discovery.zen.minimum_master_nodes: 2 

23http.cors.enabled: true 

24http.cors.allow-origin: "*"

25

26[elsearch@node03 elasticsearch-6.5.4]$ vim config/elasticsearch.yml

27#node03的配置： 

28cluster.name: es-itcast-cluster 

29node.name: node03

30node.master: false

31node.data: true 

32network.host: 0.0.0.0 

33http.port: 9200 

34discovery.zen.ping.unicast.hosts: ["192.168.92.90","192.168.92.91","192.168.92.92"] 

35discovery.zen.minimum_master_nodes: 2 

36http.cors.enabled: true 

37http.cors.allow-origin: "*"

38

39#分别启动3个节点 bin/elasticsearch

40

41[elsearch@node01 ~]# curl 127.0.0.1:9200

42{

43  "name": "node01", 

44  "cluster_name": "es-itcast-cluster", 

45  "cluster_uuid": "_na_", 

46  "version": {

47    "number": "6.5.4", 

48    "build_flavor": "default", 

49    "build_type": "tar", 

50    "build_hash": "d2ef93d", 

51    "build_date": "2018-12-17T21:17:40.758843Z", 

52    "build_snapshot": false, 

53    "lucene_version": "7.5.0", 

54    "minimum_wire_compatibility_version": "5.6.0", 

55    "minimum_index_compatibility_version": "5.0.0"

56  }, 

57  "tagline": "You Know, for Search"

58}

59[elsearch@node02 ~]# curl 127.0.0.1:9200

60{

61  "name": "node02", 

62  "cluster_name": "es-itcast-cluster", 

63  "cluster_uuid": "_na_", 

64  "version": {

65    "number": "6.5.4", 

66    "build_flavor": "default", 

67    "build_type": "tar", 

68    "build_hash": "d2ef93d", 

69    "build_date": "2018-12-17T21:17:40.758843Z", 

70    "build_snapshot": false, 

71    "lucene_version": "7.5.0", 

72    "minimum_wire_compatibility_version": "5.6.0", 

73    "minimum_index_compatibility_version": "5.0.0"

74  }, 

75  "tagline": "You Know, for Search"

76}

77[elsearch@node03 ~]# curl 127.0.0.1:9200

78{

79  "name" : "node03",

80  "cluster_name" : "es-itcast-cluster",

81  "cluster_uuid" : "_na_",

82  "version" : {

83    "number" : "6.5.4",

84    "build_flavor" : "default",

85    "build_type" : "tar",

86    "build_hash" : "d2ef93d",

87    "build_date" : "2018-12-17T21:17:40.758843Z",

88    "build_snapshot" : false,

89    "lucene_version" : "7.5.0",

90    "minimum_wire_compatibility_version" : "5.6.0",

91    "minimum_index_compatibility_version" : "5.0.0"

92  },

93  "tagline" : "You Know, for Search"

94}

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访问任何一个节点，判断是否健康：http://192.168.92.90:9200/_cluster/health?pretty

在elasticsearch-head界面管理工具，我们可以看见创建了三节点集群配置成功，

遇到的报错

org.elasticsearch.cluster.block.ClusterBlockException: blocked by: [SERVICE]

解决方法：查看9300端口是否开放

停止firewall

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1systemctl stop firewalld.service

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org.elasticsearch.discovery.MasterNotDiscoveredException

解决方法：将在三节点中node.master:true设置2个，设置一个无法体现选举的设置思想。

[node01] not enough master nodes discovered during pinging

google 超级久，两个节点的 日志和data 目录没在一个地方

可我没有指定 日志和data 目录，在浪费1个小时多，找到解决方法：
删除elasticsearch安装目录的data文件夹