Aug 18 20:07:53 ns3 audit[7045]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/proc/7045/status" pid=7045 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=111 ouid=111
I just stumbled again into the problem. took the chance to try your suggest @andreas
Aug 18 20:07:53 ns3 audit[7045]: AVC apparmor="DENIED" operation="open" profile= "/usr/sbin/ mysqld" name="/ proc/7045/ status" pid=7045 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=111 ouid=111
I just stumbled again into the problem. took the chance to try your suggest @andreas
below error
Aug 18 20:07:53 ns3 kernel: audit: type=1400 audit(150305807 3.118:64) : apparmor="DENIED" operation="open" profile= "/usr/sbin/ mysqld" name="/ proc/7045/ status" pid=7045 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=111 ouid=111 "/usr/sbin/ mysqld" name="/ sys/devices/ system/ node/" pid=7045 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=111 ouid=0 "/usr/sbin/ mysqld" name="/ proc/7045/ status" pid=7045 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=111 ouid=111 3.122:65) : apparmor="DENIED" operation="open" profile= "/usr/sbin/ mysqld" name="/ sys/devices/ system/ node/" pid=7045 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=111 ouid=0 3.122:66) : apparmor="DENIED" operation="open" profile= "/usr/sbin/ mysqld" name="/ proc/7045/ status" pid=7045 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=111 ouid=111
Aug 18 20:07:53 ns3 audit[7045]: AVC apparmor="DENIED" operation="open" profile=
Aug 18 20:07:53 ns3 audit[7045]: AVC apparmor="DENIED" operation="open" profile=
Aug 18 20:07:53 ns3 kernel: audit: type=1400 audit(150305807
Aug 18 20:07:53 ns3 kernel: audit: type=1400 audit(150305807
Aug 18 20:07:54 ns3 systemd[1]: mysql.service: Main process exited, code=exited, status=1/FAILURE