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node.jsazureubuntunpmforever

running sudo command with forever

I have the following command which is used to start my Node.js web app:

sudo node /home/azureuser/myapp/node_modules/concurrently/src/main.js --kill-others "npm run start-prod" "npm run start-prod-api"

When I run this command my web app is successfully started—note, if I run it without the sudo prefix it does not start since it must start a process that is running on port 80. However, I would like to use forever to run my web app continually. I have tried running this from the app directory:

sudo forever -c "node /home/azureuser/myapp/node_modules/concurrently/src/main.js --kill-others \"npm run start-prod\" \"npm run start-prod-api\"" -l forever.log -o out.log -e err.log -a --minUptime 20000 --spinSleepTime 5000 --uid "production" ./

When I try this I get the following error:

Error: spawn EACCES
  at exports._errnoException (util.js:870:11)
  at ChildProcess.spawn (internal/child_process.js:298:11)
  at Object.exports.spawn (child_process.js:362:9)
  at spawn (/home/azureuser/myapp/node_modules/concurrently/node_modules/cross-spawn/index.js:87:19)
  at /home/azureuser/myapp/node_modules/concurrently/src/main.js:109:21
  at arrayMap (/home/azureuser/myapp/node_modules/concurrently/node_modules/lodash/index.js:1377:25)
  at Function.map (/home/azureuser/myapp/node_modules/concurrently/node_modules/lodash/index.js:5891:14)
  at run (/home/azureuser/myapp/node_modules/concurrently/src/main.js:105:22)
  at main (/home/azureuser/myapp/node_modules/concurrently/src/main.js:37:5)
  at Object.<anonymous> (/home/azureuser/myapp/node_modules/concurrently/src/main.js:306:1)
  at Module._compile (module.js:409:26)
  at Object.Module._extensions..js (module.js:416:10)
  at Module.load (module.js:343:32)
  at Function.Module._load (module.js:300:12)
  at Function.Module.runMain (module.js:441:10)
  at startup (node.js:134:18)
error: Forever detected script exited with code: 1

When I try adding the sudo inside the -c command, it also doesn't work. Additionally I have tried adding this line to a /etc/init/myapp.conf file in Ubuntu in an attempt to start the process at boot:

su - azureuser -c "forever -c \"node /home/azureuser/myapp/node_modules/concurrently/src/main.js --kill-others \\\"npm run start-prod\\\" \\\"npm run start-prod-api\\\"\" -l forever.log -o out.log -e err.log -a --minUptime 20000 --spinSleepTime 5000 --uid \"production\" ./"

This does not work either.

It is also not an option to write out the server.js file instead of npm run start-prod in the forever command because I use better-npm-run in my package.json file to start up the server—aka: I must start the web app using npm run start-prod and npm run start-prod-api.

What am I doing wrong? How can I run this process with admin privileges (so it can run on port 80) and still use forever?

Thank you

Solution

  • As @marekful said, the solution is add a line in the /etc/sudoers via the command sudo visudo to allow execute without using sudo.

    There also is a helpful page https://askubuntu.com/questions/72267/how-to-allow-execution-without-using-the-sudo that you can refer to.

    I tried to create and run a shell script file for testing successfully, please see the steps below.

    ~ $ touch cmd.sh
~ $ chmod +x cmd.sh
~ $ vim cmd.sh # Adding the content below, testing for using `apt-get update`

#!/bin/sh
sudo apt-get update

~ $ sudo visudo # Adding a line with the content `<my-user> ALL=NOPASSWD: /usr/bin/apt-get` at the end of the `sudoers` file; find the path of `apt-get` using `which apt-get`
~ $ ./cmd.sh # it works fine without using password

    Note: Why do I need to add the sudo for apt-get? it's special for apt-get.

    So I think you can try to add a line for the command required sudo, such as node, etc.

    Any concern, please feel free to let me know.