如何在Node-RED中远程部署流文件？

Question

有没有办法将现有的Node-RED流文件部署myflow.json到运行Node-RED的远程机器上？

经过大量的谷歌搜索后,我在相关的谷歌小组中偶然发现了这个讨论,但它并不是很有启发性.

提前谢谢了.

更新(在下面的建议答案之后)

以下是来自远程计算机的建议请求的输出:

[scripts]$ curl -v -X POST http://192.168.70.73:1880/flows -H "Content-Type: application/json"  --data "@remote_test.json" 
* About to connect() to 192.168.70.73 port 1880 (#0)
*   Trying 192.168.70.73... connected
* Connected to 192.168.70.73 (192.168.70.73) port 1880 (#0)
> POST /flows HTTP/1.1
> User-Agent: curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.21 Basic ECC zlib/1.2.3 libidn/1.18 libssh2/1.4.2
> Host: 192.168.70.73:1880
> Accept: */*
> Content-Type: application/json
> Content-Length: 1088
> Expect: 100-continue
> 
< HTTP/1.1 100 Continue
< HTTP/1.1 204 No Content
< X-Powered-By: Express
< Date: Fri, 10 Feb 2017 11:45:24 GMT
< Connection: keep-alive
< 
* Connection #0 to host 192.168.70.73 left intact
* Closing connection #0

有204响应(表示成功).

以下是本地计算机控制台中的相应输出:

10 Feb 13:45:24 - [info] Stopping flows
10 Feb 13:45:24 - [info] Stopped flows
10 Feb 13:45:24 - [info] Starting flows
10 Feb 13:45:24 - [info] Started flows

没有任何反应.

要部署的流remote_test.json确实显示在本地计算机的GUI中,但它没有运行; 此外,当我尝试手动注入或启用调试节点时,我Error: node not deployed在本地GUI中获得(并且"部署"按钮处于非活动状态).

这是超简单的流程:

与format节点简单地解析从接收到的温度测量get_temp每5秒和添加时间戳:

var temp = parseFloat(msg.payload.replace( /[^\d\.]*/g, ''));
var time = new Date().toISOString().replace(/\..+/, '');

msg.payload = {'measurements' : [ { 'time'        : time }, 
                                  { 'temperature' : temp } ]
};
console.log(msg.payload);
return msg;

以下是本地部署流时的控制台输出:

10 Feb 14:08:25 - [info] Stopped flows
10 Feb 14:08:25 - [info] Starting flows
10 Feb 14:08:25 - [info] Started flows
{ measurements: [ { time: '2017-02-10T12:08:30' }, { temperature: 34.7 } ] }
{ measurements: [ { time: '2017-02-10T12:08:35' }, { temperature: 34.2 } ] }
{ measurements: [ { time: '2017-02-10T12:08:40' }, { temperature: 33.6 } ] }
{ measurements: [ { time: '2017-02-10T12:08:45' }, { temperature: 33.6 } ] }

使用node-red-start或在请求中node-red包含或不包含参数-H "Node-RED-Deployment-Type: full"来启动服务,不会有任何区别.

系统配置:

• 覆盆子3
• Node.js 7.4.0
• Node-RED 0.13.4

非常感谢,再次提前.

更新2

似乎问题出在Node.js和/或Node-RED版本上.尝试在不同的Pi中运行Node.js 6.9.5和Node-RED 0.16.2,它运行正常.

Answer 1

Node-RED运行时公开了一个REST api,它提供了在运行时部署新流配置的方法.

有问题的具体API在此处记录:http://nodered.org/docs/api/admin/methods/post/flows/

它允许您执行包含您希望运行时部署的流配置的HTTP POST.

例如,如果流文件处于myflow.json运行状态且正在运行Node-RED,则http://localhost:1880可以使用curl来部署它:

curl -X POST http://localhost:1880/flows -H "Content-Type: application/json" --data "@myflow.json"