Setup SSM to connect your VSCode to a remote Cloud9 Instance (awsbites.com)

README.md

Initial steps

1. Launch Cloud9 IDE with SSM option
2. When it launchers, open the Cloud9 IDE in the AWS Console

With SSM

Install:

• AWS CLI
• Session Manager plugin for AWS CLI installed

Then follow these steps:

1. On your client, generate (or use an existing) SSH key.

ssh-keygen -t rsa -b 4096 -f ~/.ssh/id_rsa_c9

2. On Cloud9, get your instance ID, e.g., curl [http://169.254.169.254/latest/meta-data/instance-id](http://169.254.169.254/latest/meta-data/instance-id)
3. Add the public key to the authorized keys on the Cloud9 instance (~/.ssh/authorized_keys)
4. On your client machine, edit ~/.ssh/config, adding:

Host i-* mi-*
    ProxyCommand sh -c "aws ssm start-session --target %h --document-name AWS-StartSSHSession --parameters 'portNumber=%p'"

5. Check that you can log in to your Cloud9 instance with the SSH client:

ssh -i ~/.ssh/id_rsa_c9 ec2-user@i-0ec1bd46c62784cff

6. Create an entry in your .ssh/config (Note the AWS_PROFILE setting so you have credentials!)

Host i-0ec1bd46c62784cff
    HostName i-0ec1bd46c62784cff
    IdentityFile ~/.ssh/id_rsa_c9
    User ec2-user
    ProxyCommand sh -c "aws ssm start-session --target %h --document-name AWS-StartSSHSession --parameters 'portNumber=%p'"

7. Finally, Connect to the host - Cmd+Shift+P → Connect to Host...

Now you’re coding! 😍