[TD-12465]<docs>: update least supported Grafana to 7.x and plugin to 3.1.3 (#9319)

documentation20/cn/09.connections/docs.md

@@ -7,11 +7,21 @@ TDengine 能够与开源数据可视化系统 [Grafana](https://www.grafana.com/
 
 ### 安装Grafana
 
-目前 TDengine 支持 Grafana 6.2 以上的版本。用户可以根据当前的操作系统，到 Grafana 官网下载安装包，并执行安装。下载地址如下：https://grafana.com/grafana/download。
+目前 TDengine 支持 Grafana 7.0 以上的版本。用户可以根据当前的操作系统，到 Grafana 官网下载安装包，并执行安装。下载地址如下：<https://grafana.com/grafana/download>。
 
 ### 配置Grafana
 
-TDengine 的 Grafana 插件请从 <https://github.com/taosdata/grafanaplugin/releases/latest> 下载。
+TDengine 的 Grafana 插件托管在GitHub，可从 <https://github.com/taosdata/grafanaplugin/releases/latest> 下载，当前最新版本为 3.1.3。
+
+推荐使用 [`grafana-cli` 命令行工具](https://grafana.com/docs/grafana/latest/administration/cli/) 进行插件安装。
+
+```bash
+sudo -u grafana grafana-cli \
+  --pluginUrl https://github.com/taosdata/grafanaplugin/releases/download/v3.1.3/tdengine-datasource-3.1.3.zip \
+  plugins install tdengine-datasource
+```
+
+或者下载到本地并解压到 Grafana 插件目录。
 
 ```bash
 GF_VERSION=3.1.3
@@ -31,11 +41,18 @@ Grafana 7.3+ / 8.x 版本会对插件进行签名检查，因此还需要在 gra
 allow_loading_unsigned_plugins = tdengine-datasource
 ```
 
+在Docker环境下，可以使用如下的环境变量设置自动安装并设置 TDengine 插件：
+
+```bash
+GF_INSTALL_PLUGINS=https://github.com/taosdata/grafanaplugin/releases/download/v3.1.3/tdengine-datasource-3.1.3.zip;tdengine-datasource
+GF_PLUGINS_ALLOW_LOADING_UNSIGNED_PLUGINS=tdengine-datasource
+```
+
 ### 使用 Grafana
 
 #### 配置数据源
 
-用户可以直接通过 localhost:3000 的网址，登录 Grafana 服务器（用户名/密码：admin/admin），通过左侧 `Configuration -> Data Sources` 可以添加数据源，如下图所示：
+用户可以直接通过 <http://localhost:3000> 的网址，登录 Grafana 服务器（用户名/密码：admin/admin），通过左侧 `Configuration -> Data Sources` 可以添加数据源，如下图所示：
 
 ![img](../images/connections/add_datasource1.jpg)
 

documentation20/cn/14.devops/01.telegraf/docs.md

@@ -33,8 +33,8 @@ IT 运维监测数据通常都是对时间特性比较敏感的数据，例如
 ### 下载 TDengine 插件到 grafana 插件目录
 
 ```bash
-1. wget -c https://github.com/taosdata/grafanaplugin/releases/download/v3.1.1/tdengine-datasource-3.1.1.zip
-2. sudo unzip tdengine-datasource-3.1.1.zip -d /var/lib/grafana/plugins/
+1. wget -c https://github.com/taosdata/grafanaplugin/releases/download/v3.1.3/tdengine-datasource-3.1.3.zip
+2. sudo unzip tdengine-datasource-3.1.3.zip -d /var/lib/grafana/plugins/
 3. sudo chown grafana:grafana -R /var/lib/grafana/plugins/tdengine
 4. echo -e "[plugins]\nallow_loading_unsigned_plugins = tdengine-datasource\n" | sudo tee -a /etc/grafana/grafana.ini
 5. sudo systemctl restart grafana-server.service

documentation20/cn/14.devops/02.collectd/docs.md

@@ -32,8 +32,8 @@ IT 运维监测数据通常都是对时间特性比较敏感的数据，例如
 ### 复制 TDengine 插件到 grafana 插件目录
 
 ```bash
-1. wget -c https://github.com/taosdata/grafanaplugin/releases/download/v3.1.1/tdengine-datasource-3.1.1.zip
-2. sudo unzip tdengine-datasource-3.1.1.zip -d /var/lib/grafana/plugins/
+1. wget -c https://github.com/taosdata/grafanaplugin/releases/download/v3.1.3/tdengine-datasource-3.1.3.zip
+2. sudo unzip tdengine-datasource-3.1.3.zip -d /var/lib/grafana/plugins/
 3. sudo chown grafana:grafana -R /var/lib/grafana/plugins/tdengine
 4. echo -e "[plugins]\nallow_loading_unsigned_plugins = tdengine-datasource\n" | sudo tee -a /etc/grafana/grafana.ini
 5. sudo systemctl restart grafana-server.service

documentation20/en/09.connections/docs.md

@@ -6,25 +6,47 @@ TDengine can be quickly integrated with [Grafana](https://www.grafana.com/), an
 
 ### Install Grafana
 
-TDengine currently supports Grafana 6.2 and above. You can download and install the package from Grafana website according to the current operating system. The download address is as follows:
-
-https://grafana.com/grafana/download.
+TDengine currently supports Grafana 7.0 and above. You can download and install the package from Grafana website according to the current operating system. The download address is as follows: <https://grafana.com/grafana/download>.
 
 ### Configure Grafana
 
-Download grafana plugin from <https://github.com/taosdata/grafanaplugin/releases/latest> .
+TDengine data source plugin for Grafana is hosted on GitHub, refer to GitHub latest release page <https://github.com/taosdata/grafanaplugin/releases/latest> to download the latest plugin package. Currently it's version 3.1.3 .
+
+It is recommended to use [`grafana-cli` command line tool](https://grafana.com/docs/grafana/latest/administration/cli/) to install the plugin.
+
+```bash
+sudo -u grafana grafana-cli \
+  --pluginUrl https://github.com/taosdata/grafanaplugin/releases/download/v3.1.3/tdengine-datasource-3.1.3.zip \
+  plugins install tdengine-datasource
+```
+
+Users could manually download the plugin package and install it to Grafana plugins directory.
 
 ```bash
 GF_VERSION=3.1.3
 wget https://github.com/taosdata/grafanaplugin/releases/download/v$GF_VERSION/tdengine-datasource-$GF_VERSION.zip
 ```
 
-Taking Centos 7.2 as an example, just copy grafanaplugin directory to /var/lib/grafana/plugins directory and restart Grafana.
+Taking Centos 7.2 as an example, just unpack the package to /var/lib/grafana/plugins directory and restart Grafana.
 
 ```bash
 sudo unzip tdengine-datasource-$GF_VERSION.zip /var/lib/grafana/plugins/
 ```
 
+Grafana will check the signature after 7.3 and 8.x for security. Users need additional configurations in `grafana.ini` file to allow unsigned plugins like TDengine data source.
+
+```ini
+[plugins]
+allow_loading_unsigned_plugins = tdengine-datasource
+```
+
+In docker/compose/k8s, simply setting the two environment variables will take it all for you.
+
+```bash
+GF_INSTALL_PLUGINS=https://github.com/taosdata/grafanaplugin/releases/download/v3.1.3/tdengine-datasource-3.1.3.zip;tdengine-datasource
+GF_PLUGINS_ALLOW_LOADING_UNSIGNED_PLUGINS=tdengine-datasource
+```
+
 ### Use Grafana
 
 #### Configure data source

documentation20/en/14.devops/01.telegraf/docs.md

@@ -33,8 +33,8 @@ Please download TDengine 2.3.0.0 or the above version from TAOS Data's [official
 ### Download TDengine plugin to Grafana plugin's directory
 
 ```bash
-1. wget -c https://github.com/taosdata/grafanaplugin/releases/download/v3.1.1/tdengine-datasource-3.1.1.zip
-2. sudo unzip tdengine-datasource-3.1.1.zip -d /var/lib/grafana/plugins/
+1. wget -c https://github.com/taosdata/grafanaplugin/releases/download/v3.1.3/tdengine-datasource-3.1.3.zip
+2. sudo unzip tdengine-datasource-3.1.3.zip -d /var/lib/grafana/plugins/
 3. sudo chown grafana:grafana -R /var/lib/grafana/plugins/tdengine
 4. echo -e "[plugins]\nallow_loading_unsigned_plugins = tdengine-datasource\n" | sudo tee -a /etc/grafana/grafana.ini
 5. sudo systemctl restart grafana-server.service

documentation20/en/14.devops/02.collectd/docs.md

@@ -32,8 +32,8 @@ Please download TDengine 2.3.0.0 or the above version from TAOS Data's [official
 ### Download TDengine plugin to Grafana plugin's directory
 
 ```bash
-1. wget -c https://github.com/taosdata/grafanaplugin/releases/download/v3.1.1/tdengine-datasource-3.1.1.zip
-2. sudo unzip tdengine-datasource-3.1.1.zip -d /var/lib/grafana/plugins/
+1. wget -c https://github.com/taosdata/grafanaplugin/releases/download/v3.1.3/tdengine-datasource-3.1.3.zip
+2. sudo unzip tdengine-datasource-3.1.3.zip -d /var/lib/grafana/plugins/
 3. sudo chown grafana:grafana -R /var/lib/grafana/plugins/tdengine
 4. echo -e "[plugins]\nallow_loading_unsigned_plugins = tdengine-datasource\n" | sudo tee -a /etc/grafana/grafana.ini
 5. sudo systemctl restart grafana-server.service