Node-RED使用指南：4:容器化使用方法

我不是女神ヾ 2023-07-11 11:03 19阅读 0赞

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这篇文章介绍一下如何使用Node-RED的官方镜像。

# 拉取镜像 #

使用如下命令拉取官方镜像：

> 拉取普通版本镜像：docker pull nodered/node-red:版本号

或者

> 拉取简化版镜像：docker pull nodered/node-red:版本号-minimal

*  以1.0.4的普通版本为例，拉取命令执行示例如下所示

liumiaocn:~ liumiao$ docker pull nodered/node-red:1.0.4
    1.0.4: Pulling from nodered/node-red
    ..省略
    Digest: sha256:be27cf89f0d8491f21ad53236834085c549f8fa75457ed9e695582e1ec141096
    Status: Downloaded newer image for nodered/node-red:1.0.4
    docker.io/nodered/node-red:1.0.4
    liumiaocn:~ liumiao$

*  镜像确认

liumiaocn:~ liumiao$ docker images |grep nodered
    nodered/node-red                                1.0.4                           37f21089d3eb        32 hours ago        448MB
    liumiaocn:~ liumiao$

注：还有一些其他版本的比如ARM和CPU的位数不同，可根据需要进行相应版本的镜像下载。

# 环境变量 #

<table> 
 <thead> 
  <tr> 
   <th>环境变量名称</th> 
   <th>环境变量设定内容</th> 
   <th>环境变量说明</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>FLOWS</td> 
   <td>设定的JSON文件</td> 
   <td>用于指定设定，为空时使用settings.js的设定内容</td> 
  </tr> 
  <tr> 
   <td>NODE_RED_ENABLE_SAFE_MODE</td> 
   <td>true或false</td> 
   <td>设定安全模式开启或者关闭</td> 
  </tr> 
  <tr> 
   <td>NODE_RED_ENABLE_PROJECTS</td> 
   <td>true或false</td> 
   <td>设定项目特性开启或者关闭</td> 
  </tr> 
  <tr> 
   <td>NODE_OPTIONS</td> 
   <td>运行时参数设定</td> 
   <td>用于调整运行态的设定，比如可以通过指定max_old_space_size来修改Node.js垃圾收集设定中堆的大小</td> 
  </tr> 
  <tr> 
   <td>TZ</td> 
   <td>时区设定</td> 
   <td>用于设定容器的时区，比如通过TZ=Asia/Shanghai来设定为CST时区</td> 
  </tr> 
 </tbody> 
</table>

# 数据卷 #

<table> 
 <thead> 
  <tr> 
   <th>数据卷说明</th> 
   <th>镜像内路径</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>数据或者配置信息的卷</td> 
   <td>/data</td> 
  </tr> 
 </tbody> 
</table>

注意事项：从0.2版本升级至1.0之后的版本需要注意权限的问题，可对数据目录使用chown -R 1000:1000 命令来解决相关问题。

liumiaocn:nodered liumiao$ docker exec -it nodered_node-red_1 sh
    ~ $ id
    uid=1000(node-red) gid=1000(node-red)
    ~ $

# 启动容器 #

使用如下命令即可启动Node-RED的容器

> 执行命令：docker run -it -p 1880:1880 --name nodered nodered/node-red:1.0.4

liumiaocn:~ liumiao$ docker run -it -p 1880:1880 -e TZ=Asia/Shanghai --name nodered nodered/node-red:1.0.4
    
    > node-red-docker@1.0.4 start /usr/src/node-red
    > node $NODE_OPTIONS node_modules/node-red/red.js $FLOWS "--userDir" "/data"
    
    5 Mar 09:14:17 - [info] 
    
    Welcome to Node-RED
    ===================
    
    5 Mar 09:14:17 - [info] Node-RED version: v1.0.4
    5 Mar 09:14:17 - [info] Node.js  version: v10.19.0
    5 Mar 09:14:17 - [info] Linux 4.9.184-linuxkit x64 LE
    5 Mar 09:14:17 - [info] Loading palette nodes
    5 Mar 09:14:18 - [info] Settings file  : /data/settings.js
    5 Mar 09:14:18 - [info] Context store  : 'default' [module=memory]
    5 Mar 09:14:18 - [info] User directory : /data
    5 Mar 09:14:18 - [warn] Projects disabled : editorTheme.projects.enabled=false
    5 Mar 09:14:18 - [info] Flows file     : /data/flows.json
    5 Mar 09:14:18 - [info] Creating new flow file
    5 Mar 09:14:18 - [warn] 
    
    ---------------------------------------------------------------------
    Your flow credentials file is encrypted using a system-generated key.
    
    If the system-generated key is lost for any reason, your credentials
    file will not be recoverable, you will have to delete it and re-enter
    your credentials.
    
    You should set your own key using the 'credentialSecret' option in
    your settings file. Node-RED will then re-encrypt your credentials
    file using your chosen key the next time you deploy a change.
    ---------------------------------------------------------------------
    
    5 Mar 09:14:18 - [info] Server now running at http://127.0.0.1:1880/
    5 Mar 09:14:18 - [info] Starting flows
    5 Mar 09:14:18 - [info] Started flows

*  结果确认  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdW1pYW9jbg_size_16_color_FFFFFF_t_70 1]

# Docker-Compose方式 #

也可以使用Docker-Compose方式启动Node-RED，可以使用如下示例yaml文件：

liumiaocn:nodered liumiao$ cat docker-compose.yml 
    version: "2"
    
    services:
      node-red:
        image: nodered/node-red:1.0.4
        environment:
          - TZ=Asia/Shanghai
        ports:
          - "1880:1880"
        networks:
          - node-red-net
        volumes:
          - node-red-data
    
    volumes:
      node-red-data:
    
    networks:
      node-red-net:
    liumiaocn:nodered liumiao$

*  启动服务

liumiaocn:nodered liumiao$ docker-compose up -d
    Creating network "nodered_node-red-net" with the default driver
    Creating volume "nodered_node-red-data" with default driver
    Creating nodered_node-red_1 ... done
    liumiaocn:nodered liumiao$

*  服务确认

liumiaocn:nodered liumiao$ docker-compose ps
           Name                    Command                 State               Ports         
    -----------------------------------------------------------------------------------------
    nodered_node-red_1   npm start -- --userDir /data   Up (healthy)   0.0.0.0:1880->1880/tcp
    liumiaocn:nodered liumiao$

# 参考内容 #

https://nodered.org/docs/getting-started/docker

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