package:mysql-server-5.7:5.7.29-0ubuntu0.16.04.1
Installing new version of config file /etc/apparmor.d/usr.sbin.mysqld ...
update-alternatives: using /etc/mysql/mysql.cnf to provide /etc/mysql/my.cnf (my.cnf) in auto mode
insserv: warning: current start runlevel(s) (empty) of script `mysql' overrides LSB defaults (2 3 4 5).
insserv: warning: current stop runlevel(s) (0 1 2 3 4 5 6) of script `mysql' overrides LSB defaults (0 1 6).
insserv: Script resource-server is broken: incomplete LSB comment.
insserv: missing `Required-Start:' entry: please add even if empty.
insserv: missing `Required-Stop:'  entry: please add even if empty.
insserv: missing `Default-Start:'  entry: please add even if empty.
insserv: missing `Default-Stop:'   entry: please add even if empty.
insserv: script resource-server provides system facility $resource-server, skipped!
insserv: Default-Start undefined, assuming empty start runlevel(s) for script `resource-server'
insserv: Default-Stop  undefined, assuming empty stop  runlevel(s) for script `resource-server'
mysql_upgrade: Got error: 2002: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) while connecting to the MySQL server
Upgrade process encountered error and will not continue.
mysql_upgrade failed with exit status 11
dpkg: error processing package mysql-server-5.7 (--configure):
 subprocess installed post-installation script returned error exit status 1