↓を実行して

sudo gitlab-ctl start

↓のエラーが出た場合は

fail: alertmanager: runsv not running
fail: gitaly: runsv not running
fail: gitlab-exporter: runsv not running
fail: gitlab-workhorse: runsv not running
fail: grafana: runsv not running
fail: logrotate: runsv not running
fail: nginx: runsv not running
fail: node-exporter: runsv not running
fail: postgres-exporter: runsv not running
fail: postgresql: runsv not running
fail: prometheus: runsv not running
fail: puma: runsv not running
fail: redis: runsv not running
fail: redis-exporter: runsv not running
fail: sidekiq: runsv not running

↓で直るかもしれません。

sudo /opt/gitlab/embedded/bin/runsvdir-start

環境：


Ubuntu	18.04.5 LTS (Bionic Beaver)
gitlab-cli	1:1.3.0-2
GitLab Community Edition	13.0.5