Node-RED使用指南：28:撤销与删除恢复

淩亂°似流年 2022-12-03 05:12 311阅读 0赞

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdW1pYW9jbg_size_16_color_FFFFFF_t_70]

这篇文章整理一下因误操作删除了某个Tab的撤销和恢复的方法。

### 目录 ###

*  环境准备
 *  事前准备：示例flow
 *  保存位置确认
 *  试验1: 删除Flow 2但并不进行Deploy
 *  试验2: 删除Flow 2同时进行Deploy
 *  总结

--------------------

# 环境准备 #

*  Node-RED  
    以容器方式启动Node-RED服务，启动命令如下所示：

> 启动命令：docker run -it -p 1880:1880 -v $PWD/data:/data -e TZ=Asia/Shanghai --name nodered -d nodered/node-red:1.0.4

*  执行日志示例

liumiaocn:nodered liumiao$ docker run -it -p 1880:1880 -v $PWD/data:/data -e TZ=Asia/Shanghai --name nodered -d nodered/node-red:1.0.4
    8286e234916a7dbd320d88c2dee7c1b6d119a9803ef6e633a7b0d3f1f6ab9993
    liumiaocn:nodered liumiao$ docker ps
    CONTAINER ID        IMAGE                    COMMAND                  CREATED             STATUS                             PORTS                    NAMES
    8286e234916a        nodered/node-red:1.0.4   "npm start -- --user…"   27 seconds ago      Up 27 seconds (health: starting)   0.0.0.0:1880->1880/tcp   nodered
    liumiaocn:nodered liumiao$

--------------------

# 事前准备：示例flow #

创建如下的简单flow：

[
        { 
            "id": "ec475e12.7b432",
            "type": "inject",
            "z": "73554227.4474dc",
            "name": "",
            "topic": "",
            "payload": "",
            "payloadType": "date",
            "repeat": "",
            "crontab": "",
            "once": false,
            "onceDelay": 0.1,
            "x": 140,
            "y": 140,
            "wires": [
                [
                    "99255b3e.062578"
                ]
            ]
        },
        { 
            "id": "f1bd528c.1175",
            "type": "debug",
            "z": "73554227.4474dc",
            "name": "",
            "active": true,
            "tosidebar": true,
            "console": false,
            "tostatus": false,
            "complete": "payload",
            "targetType": "msg",
            "x": 530,
            "y": 340,
            "wires": []
        },
        { 
            "id": "99255b3e.062578",
            "type": "function",
            "z": "73554227.4474dc",
            "name": "时间转换",
            "func": "// 使用payload创建日期对象\nvar date = new Date(msg.payload);\n// 转换payload的时间格式\nmsg.payload = date.toString();\n// msg中的payload的格式已经转换\nreturn msg;",
            "outputs": 1,
            "noerr": 0,
            "x": 320,
            "y": 240,
            "wires": [
                [
                    "f1bd528c.1175"
                ]
            ]
        }
    ]

具体flow如下所示：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdW1pYW9jbg_size_16_color_FFFFFF_t_70_pic_center]

--------------------

# 保存位置确认 #

上述json导入之后，执行deploy之后，保存的位置，如果是本文使用的官方镜像的话，保存文件为/data/flows.json：

/data $ pwd
    /data
    /data $ ls -lart
    total 56
    drwxr-xr-x    1 root     root          4096 Sep  1 19:00 ..
    -rw-r--r--    1 node-red node-red     12478 Sep  1 19:00 settings.js
    -rw-r--r--    1 node-red node-red       120 Sep  1 19:00 package.json
    drwxr-xr-x    3 node-red node-red        96 Sep  1 19:00 lib
    -rw-r--r--    1 node-red node-red      9385 Sep  1 19:00 .config.json.backup
    -rw-r--r--    1 node-red node-red      9633 Sep  1 19:34 .config.json
    -rw-r--r--    1 node-red node-red        44 Sep  1 19:38 flows_cred.json
    -rw-r--r--    1 node-red node-red       854 Sep  1 19:38 flows.json
    drwxr-xr-x    9 node-red node-red       288 Sep  1 19:38 .
    /data $ cat flows.json 
    [{ "id":"439fcec6.28b5e","type":"tab","label":"Flow 1","disabled":false,"info":""},{ "id":"3b7a781d.61e6e8","type":"inject","z":"439fcec6.28b5e","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":180,"y":120,"wires":[["762e7a64.734334"]]},{ "id":"7ca09953.b7c7d8","type":"debug","z":"439fcec6.28b5e","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","x":570,"y":320,"wires":[]},{ "id":"762e7a64.734334","type":"function","z":"439fcec6.28b5e","name":"时间转换","func":"// 使用payload创建日期对象\nvar date = new Date(msg.payload);\n// 转换payload的时间格式\nmsg.payload = date.toString();\n// msg中的payload的格式已经转换\nreturn msg;","outputs":1,"noerr":0,"x":360,"y":220,"wires":[["7ca09953.b7c7d8"]]}]/data $ 
    /data $

再创建一个Flow 2的tab，然后将Flow 1的内容拷贝过来，为了区分，这里将中间节点的名称修改为 时间转换2 ，其余均不变  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdW1pYW9jbg_size_16_color_FFFFFF_t_70_pic_center 1]  
然后再确认flows.json文件，发现其中已经包含了Flow 2的内容了。

/data $ ls -lrt
    total 28
    -rw-r--r--    1 node-red node-red     12478 Sep  1 19:00 settings.js
    -rw-r--r--    1 node-red node-red       120 Sep  1 19:00 package.json
    drwxr-xr-x    3 node-red node-red        96 Sep  1 19:00 lib
    -rw-r--r--    1 node-red node-red        44 Sep  1 19:38 flows_cred.json
    -rw-r--r--    1 node-red node-red      1709 Sep  1 19:43 flows.json
    /data $ cat flows.json 
    [{ "id":"439fcec6.28b5e","type":"tab","label":"Flow 1","disabled":false,"info":""},{ "id":"bced581b.cdf098","type":"tab","label":"Flow 2","disabled":false,"info":""},{ "id":"3b7a781d.61e6e8","type":"inject","z":"439fcec6.28b5e","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":180,"y":120,"wires":[["762e7a64.734334"]]},{ "id":"7ca09953.b7c7d8","type":"debug","z":"439fcec6.28b5e","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","x":570,"y":320,"wires":[]},{ "id":"762e7a64.734334","type":"function","z":"439fcec6.28b5e","name":"时间转换","func":"// 使用payload创建日期对象\nvar date = new Date(msg.payload);\n// 转换payload的时间格式\nmsg.payload = date.toString();\n// msg中的payload的格式已经转换\nreturn msg;","outputs":1,"noerr":0,"x":360,"y":220,"wires":[["7ca09953.b7c7d8"]]},{ "id":"d33e6ccb.e1f4a","type":"inject","z":"bced581b.cdf098","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":160,"y":100,"wires":[["fb0063b7.9ff31"]]},{ "id":"f3f3669e.fb2ae8","type":"debug","z":"bced581b.cdf098","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","x":550,"y":300,"wires":[]},{ "id":"fb0063b7.9ff31","type":"function","z":"bced581b.cdf098","name":"时间转换2","func":"// 使用payload创建日期对象\nvar date = new Date(msg.payload);\n// 转换payload的时间格式\nmsg.payload = date.toString();\n// msg中的payload的格式已经转换\nreturn msg;","outputs":1,"noerr":0,"x":350,"y":200,"wires":[["f3f3669e.fb2ae8"]]}]/data $ 
    /data $

--------------------

# 试验1: 删除Flow 2但并不进行Deploy #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdW1pYW9jbg_size_16_color_FFFFFF_t_70_pic_center 2]  
此时确认一下flows.json，会发现和之前仍然一样

实际上会有一个备份文件，此处为.flows.json.backup , 可以看到，此文件目前正是我们添加Flow 2之前的内容。

/data $ ls -lart
    total 60
    drwxr-xr-x    1 root     root          4096 Sep  1 19:00 ..
    -rw-r--r--    1 node-red node-red     12478 Sep  1 19:00 settings.js
    -rw-r--r--    1 node-red node-red       120 Sep  1 19:00 package.json
    drwxr-xr-x    3 node-red node-red        96 Sep  1 19:00 lib
    -rw-r--r--    1 node-red node-red      9385 Sep  1 19:00 .config.json.backup
    -rw-r--r--    1 node-red node-red      9633 Sep  1 19:34 .config.json
    -rw-r--r--    1 node-red node-red        44 Sep  1 19:38 flows_cred.json
    -rw-r--r--    1 node-red node-red       854 Sep  1 19:38 .flows.json.backup
    -rw-r--r--    1 node-red node-red      1709 Sep  1 19:43 flows.json
    drwxr-xr-x   10 node-red node-red       320 Sep  1 19:43 .
    /data $ diff flows.json .flows.json.backup 
    --- flows.json
    +++ .flows.json.backup
    @@ -1 +1 @@
    -[{ "id":"439fcec6.28b5e","type":"tab","label":"Flow 1","disabled":false,"info":""},{ "id":"bced581b.cdf098","type":"tab","label":"Flow 2","disabled":false,"info":""},{ "id":"3b7a781d.61e6e8","type":"inject","z":"439fcec6.28b5e","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":180,"y":120,"wires":[["762e7a64.734334"]]},{ "id":"7ca09953.b7c7d8","type":"debug","z":"439fcec6.28b5e","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","x":570,"y":320,"wires":[]},{ "id":"762e7a64.734334","type":"function","z":"439fcec6.28b5e","name":"时间转换","func":"// 使用payload创建日期对象\nvar date = new Date(msg.payload);\n// 转换payload的时间格式\nmsg.payload = date.toString();\n// msg中的payload的格式已经转换\nreturn msg;","outputs":1,"noerr":0,"x":360,"y":220,"wires":[["7ca09953.b7c7d8"]]},{ "id":"d33e6ccb.e1f4a","type":"inject","z":"bced581b.cdf098","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":160,"y":100,"wires":[["fb0063b7.9ff31"]]},{ "id":"f3f3669e.fb2ae8","type":"debug","z":"bced581b.cdf098","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","x":550,"y":300,"wires":[]},{ "id":"fb0063b7.9ff31","type":"function","z":"bced581b.cdf098","name":"时间转换2","func":"// 使用payload创建日期对象\nvar date = new Date(msg.payload);\n// 转换payload的时间格式\nmsg.payload = date.toString();\n// msg中的payload的格式已经转换\nreturn msg;","outputs":1,"noerr":0,"x":350,"y":200,"wires":[["f3f3669e.fb2ae8"]]}]
    \ No newline at end of file
    +[{ "id":"439fcec6.28b5e","type":"tab","label":"Flow 1","disabled":false,"info":""},{ "id":"3b7a781d.61e6e8","type":"inject","z":"439fcec6.28b5e","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":180,"y":120,"wires":[["762e7a64.734334"]]},{ "id":"7ca09953.b7c7d8","type":"debug","z":"439fcec6.28b5e","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","x":570,"y":320,"wires":[]},{ "id":"762e7a64.734334","type":"function","z":"439fcec6.28b5e","name":"时间转换","func":"// 使用payload创建日期对象\nvar date = new Date(msg.payload);\n// 转换payload的时间格式\nmsg.payload = date.toString();\n// msg中的payload的格式已经转换\nreturn msg;","outputs":1,"noerr":0,"x":360,"y":220,"wires":[["7ca09953.b7c7d8"]]}]
    \ No newline at end of file
    /data $

此种场景下的恢复方法：Ctrl + Z即可恢复  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdW1pYW9jbg_size_16_color_FFFFFF_t_70_pic_center 3]

# 试验2: 删除Flow 2同时进行Deploy #

*  删除和Deploy之前

*  删除并部署  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdW1pYW9jbg_size_16_color_FFFFFF_t_70_pic_center 4]
 *  确认结果: 可以看到.flows.json.backup的内容正是之前的内容

我们这里首先将其备份一下，改一个名字

/data $ cp -p .flows.json.backup flows.backup
    /data $ ls -lart
    total 64
    drwxr-xr-x    1 root     root          4096 Sep  1 19:00 ..
    -rw-r--r--    1 node-red node-red     12478 Sep  1 19:00 settings.js
    -rw-r--r--    1 node-red node-red       120 Sep  1 19:00 package.json
    drwxr-xr-x    3 node-red node-red        96 Sep  1 19:00 lib
    -rw-r--r--    1 node-red node-red      9385 Sep  1 19:00 .config.json.backup
    -rw-r--r--    1 node-red node-red      9633 Sep  1 19:34 .config.json
    -rw-r--r--    1 node-red node-red        44 Sep  1 19:38 flows_cred.json
    -rw-r--r--    1 node-red node-red      1709 Sep  1 19:43 flows.backup
    -rw-r--r--    1 node-red node-red      1709 Sep  1 19:43 .flows.json.backup
    -rw-r--r--    1 node-red node-red       854 Sep  1 20:02 flows.json
    drwxr-xr-x   11 node-red node-red       352 Sep  1 20:04 .
    /data $

随便移动一点Flow 1中的某个节点，然后Deploy，然后再确认结果，发现.flows.json.backup又一次更新了，如果没有之前备份的文件flows.backup，我们就找不回来了，也就是说，即使Deploy，还是有一次恢复的机会的，但是连续Deploy的话，就找不回来了。换句话说，只能找回最近一次Deploy前的内容。

/data $ ls -lart
    total 64
    drwxr-xr-x    1 root     root          4096 Sep  1 19:00 ..
    -rw-r--r--    1 node-red node-red     12478 Sep  1 19:00 settings.js
    -rw-r--r--    1 node-red node-red       120 Sep  1 19:00 package.json
    drwxr-xr-x    3 node-red node-red        96 Sep  1 19:00 lib
    -rw-r--r--    1 node-red node-red      9385 Sep  1 19:00 .config.json.backup
    -rw-r--r--    1 node-red node-red      9633 Sep  1 19:34 .config.json
    -rw-r--r--    1 node-red node-red        44 Sep  1 19:38 flows_cred.json
    -rw-r--r--    1 node-red node-red      1709 Sep  1 19:43 flows.backup
    -rw-r--r--    1 node-red node-red       854 Sep  1 20:02 .flows.json.backup
    -rw-r--r--    1 node-red node-red       854 Sep  1 20:04 flows.json
    drwxr-xr-x   11 node-red node-red       352 Sep  1 20:04 .
    /data $

# 总结 #

简单总结如下：没有Deploy，直接Ctrl + z即可撤销。如果已经Deploy，可在隐藏的备份文件.flows.json.backup中找回。如果Deploy了2次或者以上，就无力回天了。

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdW1pYW9jbg_size_16_color_FFFFFF_t_70_pic_center]: /images/20221123/e544c36e67034e09a7d1bb79bcbdcdb4.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdW1pYW9jbg_size_16_color_FFFFFF_t_70_pic_center 1]: /images/20221123/510a1f1d287a40959aee403036ce241b.png
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