Gitlab CI - SSH Permission denied (publickey,password)

Question

I've been trying to setup CD for my project. My Gitlab CI runner and my project will be on same server. I've followed https://docs.gitlab.com/ee/ci/examples/deployment/composer-npm-deploy.html but I keep getting SSH Permission denied (publickey,password). error. All my variables, private key and other variables set correctly in project settings.

I've created my ssh key with ssh-keygen -t rsa -C "[email protected]" -b 4096 command with no passphrase and set my PRODUCTION_PRIVATE_KEY variable with content of ~/.ssh/id_rsa file.

This is my gitlab-ci.yml:

stages:
  - deploy

deploy_production:
  stage: deploy
  image: tetraweb/php
  before_script:
    - 'which ssh-agent || ( apt-get update -y && apt-get install openssh-client -y )'
    - eval $(ssh-agent -s)
    - ssh-add <(echo "$PRODUCTION_PRIVATE_KEY")
    - mkdir -p ~/.ssh
    - echo -e "Host *\n\tStrictHostKeyChecking no\n\n" > ~/.ssh/config
    - apt-get install rsync
  script:
    - ssh $PRODUCTION_SERVER_USER@$PRODUCTION_SERVER
    - hostname
  only:
    - master

And this is output from Gitlab CI runner:

Running with gitlab-ci-multi-runner 9.2.0 (adfc387)
  on ci-test (1eada8d0)
Using Docker executor with image tetraweb/php ...
Using docker image sha256:17692e06e6d33d8a421441bbe9adfda5b65c94831c6e64d7e69197e0b51833f8 for predefined container...
Pulling docker image tetraweb/php ...
Using docker image tetraweb/php ID=sha256:474f639dc349f36716fb98b193e6bae771f048cecc9320a270123ac2966b98c6 for build container...
Running on runner-1eada8d0-project-3287351-concurrent-0 via lamp-512mb-ams2-01...
Fetching changes...
HEAD is now at dfdb499 Update .gitlab-ci.yml
Checking out dfdb4992 as master...
Skipping Git submodules setup
$ which ssh-agent || ( apt-get update -y && apt-get install openssh-client -y )
/usr/bin/ssh-agent
$ eval $(ssh-agent -s)
Agent pid 12
$ ssh-add <(echo "$PRODUCTION_PRIVATE_KEY")
Identity added: /dev/fd/63 (rsa w/o comment)
$ mkdir -p ~/.ssh
$ echo -e "Host *\n\tStrictHostKeyChecking no\n\n" > ~/.ssh/config
$ apt-get install rsync
Reading package lists...
Building dependency tree...
Reading state information...
rsync is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
$ ssh $PRODUCTION_SERVER_USER@$PRODUCTION_SERVER
Pseudo-terminal will not be allocated because stdin is not a terminal.
Warning: Permanently added '{MY_SERVER_IP}' (ECDSA) to the list of known hosts.
Permission denied, please try again.
Permission denied, please try again.
Permission denied (publickey,password).
ERROR: Job failed: exit code 1

Thanks in advance.

Answer 1

You need to add the public key to the server so it would be recognized as an authentication key. This is, paste the content of the public key corresponding to the private key you are using to the ~/.ssh/authorized_keys on the $PRODUCTION_SERVER.