🚧 Elasticsearch

Author: judasn

markdown-file/Elasticsearch-Base.md

@@ -24,18 +24,20 @@ services:
 
 -------------------------------------------------------------------
 
-## 环境
 
-- CentOS 7.3
+## Elasticsearch 6.5.x 安装（适配与 5.5.x）
+
+#### 环境
+
+- CentOS 7.x
+- 至少需要 2G 内存
 - root 用户
 - JDK 版本：1.8（最低要求），主推：JDK 1.8.0_121 以上
 - 关闭 firewall
 	- `systemctl stop firewalld.service` #停止firewall
 	- `systemctl disable firewalld.service` #禁止firewall开机启动
 
-## Elasticsearch 6.5.x 安装（适配与 5.5.x）
-
-### 先配置部分系统变量
+#### 先配置部分系统变量
 
 - 更多系统层面的配置可以看官网：<https://www.elastic.co/guide/en/elasticsearch/reference/current/system-config.html>
 - 配置系统最大打开文件描述符数：`vim /etc/sysctl.conf`
@@ -54,7 +56,7 @@ elasticsearch hard memlock unlimited
 * hard nofile 262144
 ```
 
-### 开始安装
+#### 开始安装
 
 - 官网 RPM 安装流程（重要，以下资料都是对官网的总结）：<https://www.elastic.co/guide/en/elasticsearch/reference/current/rpm.html>
 - 导入 KEY：`rpm --import https://artifacts.elastic.co/GPG-KEY-elasticsearch`
@@ -72,17 +74,20 @@ autorefresh=1
 type=rpm-md
 ```
 
-- 开始安装：`yum install -y elasticsearch`，国内网络安装会很慢，慢慢等
+- 开始安装：`yum install -y elasticsearch`，预计文件有 108M 左右，国内网络安装可能会很慢，慢慢等
+	- 安装完后会多了一个：elasticsearch 用户和组
+- 设置 java 软链接：`ln -s /usr/local/jdk1.8.0_181/jre/bin/java /usr/local/sbin/java`
 - 启动和停止软件（默认是不启动的）：
 	- 启动：`systemctl start elasticsearch.service`
 	- 状态：`systemctl status elasticsearch.service`
 	- 停止：`systemctl stop elasticsearch.service`
+	- 重新启动：`systemctl restart elasticsearch.service`
 - 安装完成后，增加系统自启动：
 	- `/bin/systemctl daemon-reload`
 	- `/bin/systemctl enable elasticsearch.service`
 - 检查：`curl -X GET "localhost:9200/"`
 
-### RPM 安装后的一些配置位置说明
+#### RPM 安装后的一些配置位置说明
 
 - 更多说明可以看官网：<https://www.elastic.co/guide/en/elasticsearch/reference/current/rpm.html#rpm-configuring>
 - 更加详细的配置可以看：<https://www.elastic.co/guide/en/elasticsearch/reference/current/important-settings.html>
@@ -95,6 +100,69 @@ type=rpm-md
 - 插件位置：`/usr/share/elasticsearch/plugins`
 - 脚本文件位置：`/etc/elasticsearch/scripts`
 
+#### 配置
+
+- 编辑配置文件：`vim /etc/elasticsearch/elasticsearch.yml`
+- 默认只能 localhost 访问，修改成支持外网访问
+
+```
+打开这个注释：#network.host: 192.168.0.1
+改为：network.host: 0.0.0.0
+```
+
+#### 安装 X-Pack（6.5.x 默认带了 x-pack）
+
+- `cd /usr/share/elasticsearch && bin/elasticsearch-plugin install x-pack`
+
+#### 安装 Chrome 扩展的 Head
+
+- 下载地址：<https://chrome.google.com/webstore/detail/elasticsearch-head/ffmkiejjmecolpfloofpjologoblkegm/>
+
+#### 其他细节
+
+- 如果就单个节点测试，新建索引的时候副本数记得填 0。
+
+#### 批量增加 / 删除测试数据
+
+- 官网文档：<https://www.elastic.co/guide/en/elasticsearch/reference/current/docs-bulk.html>
+- 批量增加，接口地址：`POST /_bulk`
+
+```
+{ "index" : { "_index" : "grafanadb", "_type" : "radar", "_id" : "100001" } }
+{ "post_date" : "2018-12-01 10:00:00", "request_num" :  1 }
+{ "index" : { "_index" : "grafanadb", "_type" : "radar", "_id" : "100002" } }
+{ "post_date" : "2018-12-01 10:00:05", "request_num" :  2 }
+```
+
+- cURL 格式：
+
+```
+curl -X POST "http://127.0.0.1:9200/_bulk" -H 'Content-Type: application/json' -d'
+{ "index" : { "_index" : "grafanadb", "_type" : "radar", "_id" : "100001" } }
+{ "post_date" : "2018-12-01 10:00:00", "request_num" :  1 }
+{ "index" : { "_index" : "grafanadb", "_type" : "radar", "_id" : "100002" } }
+{ "post_date" : "2018-12-01 10:00:05", "request_num" :  2 }
+'
+```
+
+- 批量删除，接口地址：`POST /_bulk`
+
+```
+{ "delete": { "_index": "grafanadb", "_type": "radar", "_id": "100001" } }
+{ "delete": { "_index": "grafanadb", "_type": "radar", "_id": "100002" } }
+```
+
+- cURL 格式：
+
+```
+curl -X POST "http://127.0.0.1:9200/_bulk" -H 'Content-Type: application/json' -d'
+{ "delete": { "_index": "grafanadb", "_type": "radar", "_id": "100001" } }
+{ "delete": { "_index": "grafanadb", "_type": "radar", "_id": "100002" } }
+'
+```
+
+
+
 
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