Hi this issue happened with me.
Update Log:
╰─○ sudo dpkg -a --configure
Setting up mysql-server-5.7 (5.7.21-0ubuntu0.17.10.1) ...
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
dpkg: dependency problems prevent configuration of mysql-server:
mysql-server depends on mysql-server-5.7; however:
Package mysql-server-5.7 is not configured yet.
dpkg: error processing package mysql-server (--configure):
dependency problems - leaving unconfigured
Errors were encountered while processing:
mysql-server-5.7
mysql-server
However i can start mysql server:
╭─ricsdeol at ricsdeol-solvian in ~ using ‹ruby-2.4.0› 18-01-23 - 9:23:00
╰─○ sudo systemctl start mysql.service
╭─ricsdeol at ricsdeol-solvian in ~ using ‹ruby-2.4.0› 18-01-23 - 9:23:12
╰─○ sudo systemctl status mysql.service
● mysql.service - MySQL Community Server
Loaded: loaded (/lib/systemd/system/mysql.service; disabled; vendor preset:
enabled)
Active: active (running) since Tue 2018-01-23 09:23:12 -02; 3s ago
Process: 3674 ExecStartPost=/usr/share/mysql/mysql-systemd-start post
(code=exited, status=0/SUCCESS)
Process: 3649 ExecStartPre=/usr/share/mysql/mysql-systemd-start pre
(code=exited, status=0/SUCCESS)
Main PID: 3673 (mysqld)
Tasks: 28 (limit: 4915)
Memory: 161.5M
CPU: 407ms
CGroup: /system.slice/mysql.service
└─3673 /usr/sbin/mysqld
jan 23 09:23:08 ricsdeol-solvian systemd[1]: Starting MySQL Community Server...
jan 23 09:23:12 ricsdeol-solvian systemd[1]: Started MySQL Community Server.
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https://bugs.launchpad.net/bugs/1732319
Title:
package mysql-server-5.7 5.7.20-0ubuntu0.17.10.1 failed to
install/upgrade: subprocess installed post-installation script
returned error exit status 1
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