Unable to finish Gitlab-CI job - gitlab-ci

Question

I have CI setup, that deploy changes to the server. Everything works perfect, changes are pulled to server, but when all tasks are ended, runner still waiting:
What is wrong? It should be finished with success.
Here is the .gitlab-ci.yml:
stages:
- deploy
before_script:
# Setup SSH deploy keys
- 'which ssh-agent || ( apt-get install -qq openssh-client )'
- eval $(ssh-agent -s)
- ssh-add <(echo "$SSH_PRIVATE_KEY" | base64 --decode)
deploy_staging:
type: deploy
environment:
name: staging
url: example.com
script:
- ssh -o StrictHostKeyChecking=no root#example.com "cd public_html/gitlab-test && git checkout master && git pull origin master && exit"
only:
- master
Update:
Output:
Running with gitlab-runner 11.6.1 (8d829975)
on Shared heeGPy6w
Using Shell executor...
Running on demeter...
Fetching changes...
HEAD is now at 4eaccda Update .gitlab-ci.yml
From https://git.example.com/user/ssh-test
4eaccda..ce1729c master -> origin/master
Checking out ce1729c4 as master...
Skipping Git submodules setup
$ which ssh-agent || ( apt-get install -qq openssh-client )
/usr/bin/ssh-agent
$ eval $(ssh-agent -s)
Agent pid 14151
$ ssh-add <(echo "$SSH_PRIVATE_KEY" | base64 --decode)
Identity added: /dev/fd/63 (/dev/fd/63)
$ ssh -o StrictHostKeyChecking=no root#example.com "cd public_html/gitlab-test && git checkout master && git pull origin master"
Already on 'master'
From https://git.example.com/user/ssh-test
* branch master -> FETCH_HEAD
4eaccda..ce1729c master -> origin/master
Updating 4eaccda..ce1729c
Fast-forward
.gitlab-ci.yml | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
$ exit 0
and after this, still waiting...

Answer 1

Finally, I resolved my problem.
Reason was in line - eval $(ssh-agent -s) - when I commented it, the job could be finished (but of course, connection didn't work). So, I attempted add killing command at the end of script:
- eval $(ssh-agent -k)
It was a solution. Now everything works excellent.
Finally code:
stages:
- deploy
before_script:
# Setup SSH deploy keys
- 'which ssh-agent || ( apt-get install -qq openssh-client )'
- eval $(ssh-agent)
- ssh-add <(echo "$SSH_PRIVATE_KEY" | base64 --decode)
deploy_staging:
type: deploy
environment:
name: staging
url: example.com
script:
- ssh -o StrictHostKeyChecking=no root#example.com "cd public_html/gitlab-test && git checkout master && git pull origin master && exit 0"
- eval $(ssh-agent -k)
only:
- master