【CentOs7/Elasticsearch7.11.0】ES單機單實例安裝手順

【介紹頁】

https://www.elastic.co/cn/downloads/past-releases/elasticsearch-7-11-1

【下載地址】

https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.11.1-linux-x86_64.tar.gz

【目標】

1.讓ES對本機9200端口提供服務，即敲入curl localhost:9200能看到

{
  "name" : "node-1",
  "cluster_name" : "hy-app322",
  "cluster_uuid" : "3uOf0MeGT06KHb1aODicpQ",
  "version" : {
    "number" : "7.11.0",
    "build_flavor" : "default",
    "build_type" : "tar",
    "build_hash" : "8ced7813d6f16d2ef30792e2fcde3e755795ee04",
    "build_date" : "2021-02-08T22:44:01.320463Z",
    "build_snapshot" : false,
    "lucene_version" : "8.7.0",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}

這樣的反饋內容；

2.讓ES對ip:9200端口提供服務，如虛擬機ip為192.168.32.130，那么主機上瀏覽器通過192.168.32.130:9200端口可以得到上面這段反饋。

3.在本機或是主機上 能創建、查詢和刪除文檔。

以上三條中，頭兩條較容易實現，但不保證實現后第三條也能順利出來。

網上類似文檔多如牛毛，但基本只滿足了目標1和2，但這是不完全的。

ES能否實用，還得以第三條為檢驗標准。

 

【准備安裝的軟件】

elasticsearch-7.11.0-linux-x86_64.tar.gz

因為該版本自帶jdk，就不需另裝一個了。 

執行命令：

wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.11.1-linux-x86_64.tar.gz

 

【系統版本及內核】

CentOS Linux release 7.9.2009 (Core)

3.10.0-1160.el7.x86_64

 

【es解壓過程】

因為es不能以root執行，故創建用戶hy，然后以這個用戶來解壓

$tar -xvzf elasticsearch-7.11.0-linux-x86_64.tar.gz

解壓之后會出現目錄elasticsearch-7.11.0，

配置文件是elasticsearch-7.11.0/config/elasticsearch.yml,

執行文件是elasticsearch-7.11.0/bin/elasticsearch

 

【elasticsearch.yml的修改點】

cluster.name: hy-app322                             # 集群名，多節點時節點扎堆就靠它，所以最好給個不易重復能獨立標識該群的名字

node.name: node-1                                     # 放開此節點即可

network.host: 0.0.0.0                                  # 改寫成0.0.0.0是讓本機和外網都能訪問

http.port: 9200                                            # 默認的服務端口 放開此節點即可

cluster.initial_master_nodes: ["node-1"]     # 放開后，去掉其中的node-2,只留下node-1

 

【/etc/security/limits.conf的修改點】

切換到root用戶
vi /etc/security/limits.conf

在文件末尾，#End of file下書寫

* soft nofile 65535

* hard nofile 131072

* soft nproc 4096

* hard nproc 4096

保存退出

此項修改在再度切換為hy用戶才有效，因此不要一個普通賬戶hy開個窗口等着，一個root在另一個窗口改。

 

【/etc/sysctl.conf的修改點】

vi /etc/sysctl.conf
添加

vm.max_map_count=655360

保存后執行
sysctl -p

 

【系統防火牆的設置】

放開9200端口或是直接了當停止防火牆

#systemctl stop firewalld 

 

【執行es】

切回hy賬戶，執行elasticsearch-7.11.0/bin/elasticsearch

 

【目標1的檢驗】 

[hy@localhost ~]$ curl localhost:9200
{
  "name" : "node-1",
  "cluster_name" : "hy-app130",
  "cluster_uuid" : "OHQmV0p8QUCLutfepnipqQ",
  "version" : {
    "number" : "7.11.0",
    "build_flavor" : "default",
    "build_type" : "tar",
    "build_hash" : "8ced7813d6f16d2ef30792e2fcde3e755795ee04",
    "build_date" : "2021-02-08T22:44:01.320463Z",
    "build_snapshot" : false,
    "lucene_version" : "8.7.0",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}
[hy@localhost ~]$

【目標2的檢驗】

 

【目標3的檢驗】

 待執行的語句：

# 創建兩條文檔
curl -H "Content-Type: application/json" -XPUT 'localhost:9200/google/emp/1?pretty' -d' {"name":"Andy","age":"21","salary":"30k","hdate":"2020-1-1T12:12:12"}'

curl -H "Content-Type: application/json" -XPUT 'localhost:9200/google/emp/2?pretty' -d' {"name":"Bill","age":"22","salary":"60k","hdate":"2021-1-1T12:12:12"}'

# 按ID查找
curl -XGET 'localhost:9200/google/emp/2?pretty'

# 刪除
curl -XDELETE 'localhost:9200/google/emp/2?pretty'

# 看是否刪掉了
curl -XGET 'localhost:9200/google/emp/2?pretty'

執行結果：

[hy@localhost ~]$ curl -H "Content-Type: application/json" -XPUT 'localhost:9200/google/emp/1?pretty' -d' {"name":"Andy","age":"21","salary":"30k","hdate":"2020-1-1T12:12:12"}'
{
  "_index" : "google",
  "_type" : "emp",
  "_id" : "1",
  "_version" : 1,
  "result" : "created",
  "_shards" : {
    "total" : 2,
    "successful" : 1,
    "failed" : 0
  },
  "_seq_no" : 0,
  "_primary_term" : 1
}
[hy@localhost ~]$ curl -H "Content-Type: application/json" -XPUT 'localhost:9200/google/emp/2?pretty' -d' {"name":"Bill","age":"22","salary":"60k","hdate":"2021-1-1T12:12:12"}'
{
  "_index" : "google",
  "_type" : "emp",
  "_id" : "2",
  "_version" : 1,
  "result" : "created",
  "_shards" : {
    "total" : 2,
    "successful" : 1,
    "failed" : 0
  },
  "_seq_no" : 1,
  "_primary_term" : 1
}
[hy@localhost ~]$ url -XGET 'localhost:9200/google/emp/2?pretty'
bash: url: command not found...
[hy@localhost ~]$ curl -XGET 'localhost:9200/google/emp/2?pretty'
{
  "_index" : "google",
  "_type" : "emp",
  "_id" : "2",
  "_version" : 1,
  "_seq_no" : 1,
  "_primary_term" : 1,
  "found" : true,
  "_source" : {
    "name" : "Bill",
    "age" : "22",
    "salary" : "60k",
    "hdate" : "2021-1-1T12:12:12"
  }
}
[hy@localhost ~]$ curl -XDELETE 'localhost:9200/google/emp/2?pretty'
{
  "_index" : "google",
  "_type" : "emp",
  "_id" : "2",
  "_version" : 2,
  "result" : "deleted",
  "_shards" : {
    "total" : 2,
    "successful" : 1,
    "failed" : 0
  },
  "_seq_no" : 2,
  "_primary_term" : 1
}
[hy@localhost ~]$ curl -XGET 'localhost:9200/google/emp/2?pretty'
{
  "_index" : "google",
  "_type" : "emp",
  "_id" : "2",
  "found" : false
}
[hy@localhost ~]$

如果執行和預期一致，則說明安裝成功。

 

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