Elasticsearch集群是怎么搭建的

Elasticsearch集群是怎么搭建的，针对这个问题，这篇文章详细介绍了相对应的分析和解答，希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。

一：资源

集群： gh-cluster

节点1：gh-cluster-node-01   10.44.66.2

节点2：gh-cluster-node-02   10.116.148.103

节点3：gh-cluster-node-03   10.170.142.108

Elasticsearch:elasticsearch-2.4.4.tar.gz

安装目录：/mnt/gh

二：安装 Elasticsearch

1.创建相关文件目录 

mkdir -p /mnt/gh/data/logs/elasticsearch
mkdir -p /mnt/gh/data/elasticsearch/{data,work,plugins,scripts}

2.创建新的用户

groupadd elsearch
useradd elsearch -g elsearch -p elsearch

3.操作权限

chown -R elsearch:elsearch /mnt/gh/data/logs/elasticsearch /mnt/gh/data/elasticsearch

4.安装 Elasticsearch

tar -zxvf elasticsearch-2.4.4.tar.gz

5./etc/security/limits.conf 配置

elsearch soft memlock unlimited
elsearch hard memlock unlimited

6.Elasticsearch 配置

vi /mnt/gh/elasticsearch-2.4.4/config/elasticsearch.yml 

点击(此处)折叠或打开

1. # ======================== Elasticsearch Configuration =========================
   

2. #
   

3. # NOTE: Elasticsearch comes with reasonable defaults for most settings.
   

4. # Before you set out to tweak and tune the configuration, make sure you
   

5. #       understand what are you trying to accomplish and the consequences.
   

6. #
   

7. # The primary way of configuring a node is via this file. This template lists
   

8. # the most important settings you may want to configure for a production cluster.
   

9. #
   

10. # Please see the documentation for further information on configuration options:
    

11. # <http://www.elastic.co/guide/en/elasticsearch/reference/current/setup-configuration.html>
    

12. #
    

13. # ---------------------------------- Cluster -----------------------------------
    

14. #
    

15. # Use a descriptive name for your cluster:
    

16. #
    

17.   cluster.name: gh-cluster
    

18. #
    

19. # ------------------------------------ Node ------------------------------------
    

20. #
    

21. # Use a descriptive name for the node:
    

22. #
    

23.   node.name: gh-cluster-node-01
    

24. #
    

25. # Add custom attributes to the node:
    

26. #
    

27. # node.rack: r1
    

28. #
    

29. # ----------------------------------- Paths ------------------------------------
    

30. #
    

31. # Path to directory where to store the data (separate multiple locations by comma):
    

32.   path.data: /mnt/gh/data/elasticsearch/data
    

33. #
    

34. # Path to log files:
    

35. #
    

36.   path.logs : /mnt/gh/data/logs/elasticsearch
    

37.   path.plugins: /mnt/gh/data/elasticsearch/plugins
    

38.   path.scripts: /mnt/gh/data/elasticsearch/scripts
    

39. #
    

40. # ----------------------------------- Memory -----------------------------------
    

41. #
    

42. # Lock the memory on startup:
    

43. #
    

44.   bootstrap.memory_lock: true
    

45. #
    

46. # Make sure that the `ES_HEAP_SIZE` environment variable is set to about half the memory
    

47. # available on the system and that the owner of the process is allowed to use this limit.
    

48. #
    

49. # Elasticsearch performs poorly when the system is swapping the memory.
    

50. #
    

51. # ---------------------------------- Network -----------------------------------
    

52. #
    

53. # Set the bind address to a specific IP (IPv4 or IPv6):
    

54. #
    

55.   network.host: 10.44.66.2
    

56. #
    

57. # Set a custom port for HTTP:
    

58. #
    

59.   http.port: 9200
    

60. #
    

61. # For more information, see the documentation at:
    

62. # <http://www.elastic.co/guide/en/elasticsearch/reference/current/modules-network.html>
    

63. #
    

64. # --------------------------------- Discovery ----------------------------------
    

65. #
    

66. # Pass an initial list of hosts to perform discovery when new node is started:
    

67. # The default list of hosts is ["127.0.0.1", "[::1]"]
    

68. #
    

69.   discovery.zen.ping.multicast.enabled: false
    

70.   discovery.zen.ping_timeout: 120s
    

71.   discovery.zen.fd.ping_timeout: 120s
    

72.   discovery.zen.ping.unicast.hosts: ["10.44.66.2", "10.116.148.103", "10.170.142.108"]
    

73. #
    

74. # Prevent the "split brain" by configuring the majority of nodes (total number of nodes / 2 + 1):
    

75. #
    

76.   discovery.zen.minimum_master_nodes: 2
    

77. #
    

78. # For more information, see the documentation at:
    

79. # <http://www.elastic.co/guide/en/elasticsearch/reference/current/modules-discovery.html>
    

80. #
    

81. # ---------------------------------- Gateway -----------------------------------
    

82. #
    

83. # Block initial recovery after a full cluster restart until N nodes are started:
    

84. #
    

85.   gateway.recover_after_nodes: 3
    

86.   gateway.recover_after_time: 30m
    

87.   gateway.expected_nodes: 3
    

88. #
    

89. # For more information, see the documentation at:
    

90. # <http://www.elastic.co/guide/en/elasticsearch/reference/current/modules-gateway.html>
    

91. #
    

92. # ---------------------------------- Various -----------------------------------
    

93. #
    

94. # Disable starting multiple nodes on a single system:
    

95. #
    

96. # node.max_local_storage_nodes: 1
    

97. #
    

98. # Require explicit names when deleting indices:
    

99. #
    

100. # action.destructive_requires_name: true

各节点调整node-name的配置信息，保证唯一。

四： 在节点1上面安装Elasticsearch  插件

1.安装head插件 监控Elasticsearch的运行状态以及数据

./plugin -DproxyPort=4832  -DproxyHost=10.116.4.116   install  mobz/elasticsearch-head

红色部分因为是内网，用了代理访问外网

2.安装kopf插件 ---ElasticSearch的管理工具

./plugin -DproxyPort=4832  -DproxyHost=10.116.4.116   install  lmenezes/elasticsearch-kopf

五：启动

以elsearch用户启动三个节点

/mnt/gh/elasticsearch-2.4.4/bin/elasticsearch

六：验证

1.http://10.44.66.2:9200/

{
  "name" : "gh-cluster-node-01",
  "cluster_name" : "gh-cluster",
  "cluster_uuid" : "iGovr8lcSW62JdEABzLMyg",
  "version" : {
    "number" : "2.4.4",
    "build_hash" : "fcbb46dfd45562a9cf00c604b30849a6dec6b017",
    "build_timestamp" : "2017-01-03T11:33:16Z",
    "build_snapshot" : false,
    "lucene_version" : "5.5.2"
  },
  "tagline" : "You Know, for Search"
}

2.head插件  http://10.44.66.2:9200/_plugin/head/



3.kopf插件 http://10.44.66.2:9200/_plugin/kopf/#!/nodes



七：操作命令

1.检查集群的状态
curl '10.44.66.2:9200/_cat/health?v'


2.检查节点的信息
curl '10.44.66.2:9200/_cat/nodes?v'


3.检查索引信息
curl '10.44.66.2:9200/_cat/indices?v'


4.创建索引
curl -XPUT '10.44.66.2:9200/customer?pretty'


5.往索引中，添加文档
curl -XPUT '10.44.66.2:9200/customer/external/1?pretty' -d '{"name":"John Doe"}'


6.查看文档信息
curl -XGET '10.44.66.2:9200/customer/external/1?pretty'


7.查看所有文档数量
curl -XGET '10.44.66.2:9200/_count?pretty' -d '{"query":{"match_all":{}}}'


8.删除索引
curl -XDELETE '10.44.66.2:9200/customer?pretty'


9.随机创建文档信息
curl -XPOST '10.44.66.2:9200/customer/external?pretty' -d '{"name":"Geng Chong"}'






一个 Elasticsearch 请求和任何 HTTP 请求一样由若干相同的部件组成：


curl -X<VERB> '<PROTOCOL>://<HOST>:<PORT>/<PATH>?<QUERY_STRING>' -d '<BODY>'


被 < > 标记的部件：


VERB


适当的 HTTP 方法 或 谓词 : GET`、 `POST`、 `PUT`、 `HEAD 或者 `DELETE`。


PROTOCOL


http 或者 https`（如果你在 Elasticsearch 前面有一个 `https 代理）


HOST


Elasticsearch 集群中任意节点的主机名，或者用 localhost 代表本地机器上的节点。


PORT


运行 Elasticsearch HTTP 服务的端口号，默认是 9200 。


PATH


API 的终端路径（例如 _count 将返回集群中文档数量）。Path 可能包含多个组件，例如：_cluster/stats 和 _nodes/stats/jvm 。


QUERY_STRING


任意可选的查询字符串参数 (例如 ?pretty 将格式化地输出 JSON 返回值，使其更容易阅读)


BODY

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