环境变量未加载到Node.js中的process.env [英] Environment Variables not loading to process.env in Nodejs

问题描述

我正在构建一个nodejs api，并已将 dotenv 软件包设置为dev依赖项，以将变量加载到开发人员的本地计算机上的 process.env 中.

I'm building out a nodejs api and have setup the dotenv package as a dev dependency to load the variables to process.env on developer's local machines.

请注意，当我登录时，我使用 sudo -i 来作为 root .

Note that when I log in I use sudo -i to operate as root.

我的意图是在部署过程中，将在我的Ubuntu主机中的/etc/environment 下设置环境变量，然后将其直接加载到进程中，然后该应用程序将针对该配置运行.

My intent is that during deployment, environment variables would be set in my Ubuntu host under /etc/environment, loaded directly in to the process, and then the app would just run for that configuration.

为此，我在 server.js 的开头一行:

To do this, I have a line at the start of server.js:

if(process.env.NODE_ENV === 'development') {
    logger.info("Loading dotenv for development environment")
    require('dotenv').config();
}

并且将指示开发人员为他们的系统添加 NODE_ENV 的环境变量.

And developers will be instructed to add an environment variable to their system for NODE_ENV.

现在，在我的Ubuntu EC2实例中，我已经设置了/etc/environment 以具有所需的环境变量(请注意，此处的NODE_ENV为'dev'只是为了避免运行dotenv):

Now, in my Ubuntu EC2 instance I've setup the /etc/environment to have the environment variables I want (note that NODE_ENV being 'dev' here is just to avoid running dotenv):

PORT=MYPORT
NODE_ENV=dev
APP_SECRET_KEY='MYSECRET'
APP_DATABASE_LOGIN=MYLOGIN
APP_DATABASE_PASSWORD='MYPASS'
APP_DATABASE_HOST=MYHOST
APP_DATABASE_NAME=MYDB
APP_DATABASE_PORT=MYDBPORT

当我重新启动并运行 printenv 时，它们都是按文件填充的.

And when I reboot and run printenv they are all populated per the file.

我已设置 pm2 来直接从 server.js 运行我的应用程序，而无需任何其他配置，因为据我了解， process.env 是从环境变量自动填充的.

I have setup pm2 to run my application directly from server.js without any additional configuration because as I understand it, process.env is populated automatically from environment variables.

但是，当我记录来自process.env的值时，我只是对所有内容都为空:

However, when I log the values from process.env, I just get null for everything:

logger.info({
    connectionConfig: {
        host: process.env.APP_DATABASE_HOST
        , login: process.env.APP_DATABASE_LOGIN
        , port: process.env.APP_DATABASE_PORT
        , databaseName: process.env.APP_DATABASE_NAME
    }
});

这里的配置是否存在问题?

Is there something wrong with the configuration as-is here?

注意:按照下面的答案，我在启动pm2之后错误地设置了环境变量，因此pm2缓存丢失了它们

Note: Per the answer below, I had mistakenly setup my environment variables AFTER starting pm2, and as such pm2 caching was missing them

推荐答案

问题是 pm2 缓存环境变量.

您必须这样做:

# all apps
pm2 restart all --update-env
# specific app
pm2 restart {pid} --update-env

如果由于某种原因不起作用，则记录的方式为:

If for some reason that doesn't work, the documented way is:

pm2 reload ecosystem.json --update-env

您可以在此处阅读更多信息:

You can read more in here:

这篇关于环境变量未加载到Node.js中的process.env的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！