node.js - Docker Node.js 环境变量

Question

我正在尝试在 docker 上使用仅命令所需的环境变量。在 Mac/Linux 上，我可以简单地运行 token=1234 node command.js 并且 token 可以作为环境变量使用。但是当我使用 docker docker exec $CONTAINER nenv token=123 node command.js 执行此操作时，我得到 unknown command token=123

Answer 1

我不使用 Node 环境，我建议执行以下操作:

创建config文件夹

将其放入config/index.js

var
    nconf = require('nconf'),
    path = require('path');

nconf.env().argv();

nconf.file('local', path.join(__dirname, 'config.local.json'));
nconf.file(path.join(__dirname, 'config.json'));

module.exports = nconf;

创建文件:config/config.json(配置模板)和config/config.local.json(具有真实配置的模板副本)

例如:

{
  "app": {
    "useCluster": false,
    "http": {
      "enabled": true,
      "port": 8000,
      "host": "0.0.0.0"
    },
    "https": {
      "enabled": false,
      "port": 443,
      "host": "0.0.0.0",
      "certificate": {
        "key": "server.key",
        "cert": "server.crt"
      }
    },
    "env": "production",
    "profiler": false
  },
  "db": {
    "driver": "mysql",
    "host": "address here",
    "port": 3306,
    "user": "username here",
    "pass": "password here",
    "name": "database name here"
  },
}

在应用程序开头使用:var config = require('./config');

并在需要时使用config对象:

var config = require('./config'),
    cluster = require('./components/cluster'),
    http = require('http'),
    ...
    ...
    https = require('https');

cluster.start(function() {
    if (config.get('app:http:enabled')) {
        var httpServer = http.createServer(app);
        httpServer.listen(config.get('app:http:port'), config.get('app:http:host'),
            function () {
                winston.info('App listening at http://%s:%s', config.get('app:http:host'), config.get('app:http:port'));
            });
    }

    if (config.get('app:https:enabled')) {
        var httpsServer = https.createServer({
            key: fs.readFileSync(path.join(__dirname, 'certificates', config.get('app:https:certificate:key'))),
            cert: fs.readFileSync(path.join(__dirname, 'certificates', config.get('app:https:certificate:cert')))
        }, app);
        httpsServer.listen(config.get('app:https:port'), config.get('app:https:host'),
            function () {
                winston.info('App listening at https://%s:%s', config.get('app:https:host'), config.get('app:https:port'));
            });
    }
});

此示例是基于环境的配置的更准确方法。例如: config.local.json 配置将添加到 .gitignore 等等...