I have been trying to create a three-node percona cluster. The problem is, I am getting this MySQL PID not found in a freshly installed server.
root@debian-s-4vcpu-8gb-sgp1-01:~# sudo service mysql status
● mysql.service - Start and stop the mysql (Percona XtraDB Cluster) daemon
Loaded: loaded (/lib/systemd/system/mysql.service; enabled; vendor preset: enabled)
Active: inactive (dead) since Tue 2018-01-23 12:46:30 UTC; 3min 33s ago
Process: 5451 ExecStop=/etc/init.d/mysql stop (code=exited, status=0/SUCCESS)
Process: 4969 ExecStart=/etc/init.d/mysql start (code=exited, status=0/SUCCESS)
Process: 4893 ExecStartPre=/usr/share/mysql/mysql-systemd-start pre (code=exited, status=0/SUCCESS)
Main PID: 5007 (code=exited, status=0/SUCCESS)
Jan 23 12:46:07 debian-s-4vcpu-8gb-sgp1-01 systemd[1]: Starting Start and stop the mysql (Percona XtraDB Cluster) daemon…
Jan 23 12:46:12 debian-s-4vcpu-8gb-sgp1-01 systemd[1]: Started Start and stop the mysql (Percona XtraDB Cluster) daemon.
Jan 23 12:46:15 debian-s-4vcpu-8gb-sgp1-01 systemd[1]: Stopping Start and stop the mysql (Percona XtraDB Cluster) daemon…
Jan 23 12:46:30 debian-s-4vcpu-8gb-sgp1-01 /etc/init.d/mysql[5553]: MySQL PID not found, pid_file detected/guessed: /var/run/mysqld/mysqld.pid
Jan 23 12:46:30 debian-s-4vcpu-8gb-sgp1-01 systemd[1]: Stopped Start and stop the mysql (Percona XtraDB Cluster) daemon.