GitLab больше не работает после установки Docker/Discourse

Раньше у меня был постоянно обновляемый экземпляр GitLab на моем аппаратном сервере (Ubuntu 14.04).

Однако недавно я решил установить Discourse (или Docker), и теперь GitLab больше не запускается должным образом.

Когда я запускаю службу, запускается процесс sidekiq, но не рабочий Unicorn:

git@host:~$ bash -x /etc/init.d/gitlab start
+ RAILS_ENV=production
+ app_user=git
+ app_root=/home/git/gitlab
+ pid_path=/home/git/gitlab/tmp/pids
+ socket_path=/home/git/gitlab/tmp/sockets
+ web_server_pid_path=/home/git/gitlab/tmp/pids/unicorn.pid
+ sidekiq_pid_path=/home/git/gitlab/tmp/pids/sidekiq.pid
+ test -f /etc/default/gitlab
+ . /etc/default/gitlab
++ RAILS_ENV=production
++ app_user=git
++ app_root=/home/git/gitlab
++ pid_path=/home/git/gitlab/tmp/pids
++ socket_path=/home/git/gitlab/tmp/sockets
++ web_server_pid_path=/home/git/gitlab/tmp/pids/unicorn.pid
++ sidekiq_pid_path=/home/git/gitlab/tmp/pids/sidekiq.pid
+ '[' git '!=' git ']'
+ cd /home/git/gitlab
+ check_pids
+ mkdir -p /home/git/gitlab/tmp/pids
+ '[' -f /home/git/gitlab/tmp/pids/unicorn.pid ']'
++ cat /home/git/gitlab/tmp/pids/unicorn.pid
+ wpid=8688
+ '[' -f /home/git/gitlab/tmp/pids/sidekiq.pid ']'
++ cat /home/git/gitlab/tmp/pids/sidekiq.pid
+ spid=2923
+ case "$1" in
+ start_gitlab
+ check_stale_pids
+ check_status
+ check_pids
+ mkdir -p /home/git/gitlab/tmp/pids
+ '[' -f /home/git/gitlab/tmp/pids/unicorn.pid ']'
++ cat /home/git/gitlab/tmp/pids/unicorn.pid
+ wpid=8688
+ '[' -f /home/git/gitlab/tmp/pids/sidekiq.pid ']'
++ cat /home/git/gitlab/tmp/pids/sidekiq.pid
+ spid=2923
+ '[' 8688 -ne 0 ']'
+ kill -0 8688
+ web_status=1
+ '[' 2923 -ne 0 ']'
+ kill -0 2923
+ sidekiq_status=0
+ '[' 1 = 0 -a 0 = 0 ']'
+ gitlab_status=3
+ '[' 8688 '!=' 0 -a 1 '!=' 0 ']'
+ echo 'Removing stale Unicorn web server pid. This is most likely caused by the web server crashing the last time it ran.'
Removing stale Unicorn web server pid. This is most likely caused by the web server crashing the last time it ran.
+ rm /home/git/gitlab/tmp/pids/unicorn.pid
+ '[' 2923 '!=' 0 -a 0 '!=' 0 ']'
+ '[' 1 '!=' 0 -a 0 '!=' 0 ']'
+ '[' 1 '!=' 0 ']'
+ echo -n 'Starting GitLab Unicorn'
Starting GitLab Unicorn+ '[' 1 = 0 ']'
+ rm -f /home/git/gitlab/tmp/sockets/gitlab.socket
+ RAILS_ENV=production
+ bin/web start
master failed to start, check stderr log for details
+ '[' 0 = 0 ']'
+ echo 'The Sidekiq job dispatcher is already running with pid 2923, not restarting'
The Sidekiq job dispatcher is already running with pid 2923, not restarting
+ wait_for_pids
+ i=0
+ '[' '!' -f /home/git/gitlab/tmp/pids/unicorn.pid -o '!' -f /home/git/gitlab/tmp/pids/sidekiq.pid ']'
+ echo

+ print_status
+ check_status
+ check_pids
+ mkdir -p /home/git/gitlab/tmp/pids
+ '[' -f /home/git/gitlab/tmp/pids/unicorn.pid ']'
++ cat /home/git/gitlab/tmp/pids/unicorn.pid
+ wpid=9352
+ '[' -f /home/git/gitlab/tmp/pids/sidekiq.pid ']'
++ cat /home/git/gitlab/tmp/pids/sidekiq.pid
+ spid=2923
+ '[' 9352 -ne 0 ']'
+ kill -0 9352
+ web_status=0
+ '[' 2923 -ne 0 ']'
+ kill -0 2923
+ sidekiq_status=0
+ '[' 0 = 0 -a 0 = 0 ']'
+ gitlab_status=0
+ '[' 0 '!=' 0 -a 0 '!=' 0 ']'
+ '[' 0 = 0 ']'
+ echo 'The GitLab Unicorn web server with pid 9352 is running.'
The GitLab Unicorn web server with pid 9352 is running.
+ '[' 0 = 0 ']'
+ echo 'The GitLab Sidekiq job dispatcher with pid 2923 is running.'
The GitLab Sidekiq job dispatcher with pid 2923 is running.
+ '[' 0 = 0 -a 0 = 0 ']'
+ printf 'GitLab and all its components are \033[32mup and running\033[0m.\n'
GitLab and all its components are up and running.
+ exit
git@host:~$

И нет, Docker не пытается привязываться к портам, которые использует GitLab:

root@host ~ # netstat -tulpn
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 127.0.0.1:6379          0.0.0.0:*               LISTEN      3076/redis-server 1
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      2940/nginx
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      1330/sshd
tcp        0      0 0.0.0.0:25              0.0.0.0:*               LISTEN      3055/master
tcp        0      0 0.0.0.0:443             0.0.0.0:*               LISTEN      2940/nginx
tcp        0      0 127.0.0.1:3306          0.0.0.0:*               LISTEN      1391/mysqld
tcp6       0      0 :::2222                 :::*                    LISTEN      30087/docker-proxy
tcp6       0      0 :::8080                 :::*                    LISTEN      30094/docker-proxy
tcp6       0      0 :::80                   :::*                    LISTEN      2940/nginx
tcp6       0      0 :::4949                 :::*                    LISTEN      1168/perl
tcp6       0      0 :::22                   :::*                    LISTEN      1330/sshd
tcp6       0      0 :::25                   :::*                    LISTEN      3055/master
tcp6       0      0 :::1311                 :::*                    LISTEN      2518/dsm_om_connsvc
udp        0      0 0.0.0.0:51367           0.0.0.0:*                           1911/openvpn

Nginx работает, но показывает только:

«502 — GitLab не отвечает».

Кто-нибудь может мне помочь?

Заранее спасибо.