「GitLab CI/CD」- Kubernetes Agent Server

vim /etc/gitlab/gitlab.rb
... gitlab_kas['enable'] = true

gitlab-ctl reconfigure

...
    location /-/kubernetes-agent/ {
        proxy_set_header Host $host;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";

        proxy_pass http://127.0.0.1:8929;
    }
...