Cara Memperbaiki NGINX (Too many levels of symbolic links) pada Ubuntu 16.04

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Beberapa waktu lalu, saya melakukan upgrade software nginx pada salah satu server namun ketika direstart sangat lama sekali dengan pesan kurang lebih seperti ini:

# service nginx status
● nginx.service - nginx - high performance web server
   Loaded: loaded (/lib/systemd/system/nginx.service; enabled; vendor preset: enabled)
   Active: failed (Result: timeout) since Sun 2020-02-23 21:45:15 WIB; 2min 11s ago
     Docs: http://nginx.org/en/docs/
  Process: 272 ExecStart=/usr/sbin/nginx -c /etc/nginx/nginx.conf (code=exited, status=0/SUCCESS)

Feb 23 21:43:45 twice systemd[1]: Starting nginx - high performance web server...
Feb 23 21:43:45 twice systemd[1]: nginx.service: Can't open PID file /var/run/nginx.pid (yet?) after start: Too many levels of symbolic links
Feb 23 21:45:15 twice systemd[1]: nginx.service: Start operation timed out. Terminating.
Feb 23 21:45:15 twice systemd[1]: Failed to start nginx - high performance web server.
Feb 23 21:45:15 twice systemd[1]: nginx.service: Unit entered failed state.
Feb 23 21:45:15 twice systemd[1]: nginx.service: Failed with result 'timeout'.

Ini yang jadi masalah kayanya folder /var/run/ jadi saya coba cek isinya, kurang lebih seperti ini:

# ls -lrth
total 36K
drwxr-xr-x  2 root  root   40 Dec 30 13:34 rpc_pipefs
drwxr-xr-x  2 root  root   60 Dec 30 13:34 mount
drwxr-xr-x  3 root  root   60 Dec 30 13:34 log
drwxrwxrwt  2 root  root   40 Dec 30 13:34 shm
drwxr-xr-x  2 root  root   60 Dec 30 13:34 sysconfig
drwxr-xr-x  2 root  root   40 Dec 30 13:34 sendsigs.omit.d
lrwxrwxrwx  1 root  root   25 Dec 30 13:34 initctl -> /run/systemd/initctl/fifo
drwxr-xr-x  2 root  root   40 Dec 30 13:34 sshd
drwxr-xr-x  2 root  root   40 Dec 30 13:34 user
drwxr-xr-x  2 root  root   40 Dec 30 13:34 sudo
drwxrwxrwt  3 root  root   80 Dec 30 13:34 lock
drwxr-xr-x  2 root  root  140 Dec 30 13:34 network
srw-rw-rw-  1 root  root    0 Dec 30 13:34 rpcbind.sock
drwxr-xr-x  2 root  root   60 Dec 30 13:34 dbus
-r--r--r--  1 root  root    0 Dec 30 13:34 rpcbind.lock
-rw-r--r--  1 root  root    4 Dec 30 13:34 crond.pid
----------  1 root  root    0 Dec 30 13:34 crond.reboot
-rw-r--r--  1 root  root    3 Dec 30 13:34 rsyslogd.pid
drwxr-xr-x  4 root  root  100 Dec 30 13:34 udev
-rw-r--r--  1 root  root    4 Dec 30 13:34 monit.pid
-rw-r--r--  1 root  root    4 Dec 30 13:34 sshd.pid
-rw-r--r--  1 root  root    4 Dec 30 13:34 xinetd.pid
-rw-------  1 root  root    0 Dec 30 13:34 agetty.reload
-rw-r-----  1 root  root    0 Dec 31 06:55 unattended-upgrades.lock
drwxr-xr-x  2 root  root   80 Jan 17 14:35 rpcbind
-rw-r--r--  1 root  root    0 Jan 17 14:36 init.upgraded
-rw-r--r--  1 root  root    0 Jan 17 14:36 reboot-required
drwxr-xr-x  3 root  root   60 Jan 22 06:57 samba
drwx--x---  2 root  sasl  140 Jan 29 06:53 saslauthd
drwxr-xr-x  2 mysql root   80 Feb  4 09:00 mysqld
-rw-r--r--  1 root  root   31 Feb 19 06:20 unattended-upgrades.progress
-rw-r--r--  1 root  root  388 Feb 23 21:06 motd.dynamic
-rw-rw-r--  1 root  root 1.9K Feb 23 21:06 utmp
drwxr-xr-x  2 root  root   60 Feb 23 21:15 php
-rw-r--r--  1 root  root    0 Feb 23 21:17 hello.txt
drwxr-xr-x 17 root  root  440 Feb 23 21:30 systemd
-rw-r--r--  1 root  root    5 Feb 23 21:33 nginx.pid

Ini saya coba cek lagi ternyata eh ternyata, folder /var/run adalah symlink dari folder /run/ yang memang sengaja didesain ubuntu sedemikian rupa. Nah untuk memperbaikinya cukup mudah, cukup sesuaikan yang tadinya /var/run/nginx.pid menjadi /run/nginx.pid. Kurang lebih seperti ini:

Pada file /lib/systemd/system/nginx.service:

PIDFile=/run/nginx.pid

Pada file /etc/nginx/nginx.conf:

pid /run/nginx.pid;

Jalankan daemon-reload:

systemctl daemon-reload

Kemudian restart nginx:

systemctl restart nginx

Mestinya sukses jalan kembali si nginx yang tadi ga bisa jalan itu, hehe sip sip semoga bermanfaat ya~~

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