node.jsbashsshshelljs

SSH Connection gets refused when executing bash script within Node.js

So my structure looks like this:

main.js
folder1/
   jsFile1.js
folder2/
   jsFile2.js
   bashFile.sh

main.js requires jsFile1.js which then requires and runs jsFile2.js. jsFile2.js then finally runs bashFile.sh using ShellJS and passes three arguments. 

shell.exec(`bash utils/sshAndCreate.sh ${ip} ${encryptedUser} ${encryptedPw}`);

bashFile.sh:

#!/bin/bash

# Variables
host=$1
user=$2
pw=$3

# Postdata
postdata="someUnfinishedStuff"

# Download the file to the server
ssh root@$host -o StrictHostKeyChecking=no wget http://myOtherServer/api --post-data $postdata -O bash.sh

My problem is that when I manually start bashFile.sh using bash bashFile.sh parameter1 parameter2 parameter3 it works just fine and as expected but it doesn't work when I run main.js which eventually also runs the script. I just get 

ssh: connect to host myServerIpHere port 22: Connection refused

What is also weird, I moved the shell.exec part to jsFile1.js and it worked a few times but when I tried again my connection also gets refused.

Note 1: I never connected to the server before, so it isn't in my known_hosts.

Note 2: A child_process produces the same error.

Solution

  • I now found a solution. Even though the server should be ready it sometimes isn't. So I solved it by just repeating the process of connecting until the server accepts the connection.

    until ssh root@$host command
do
    sleep 10
done