package mysql-server-5.7 5.7.20-0ubuntu0.16.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

[Florian Fehrenbacher]

problems with mysql-server

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: mysql-server-5.7 5.7.20-0ubuntu0.16.04.1
ProcVersionSignature: Ubuntu 4.10.0-38.42~16.04.1-generic 4.10.17
Uname: Linux 4.10.0-38-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
Date: Thu Nov 16 14:17:24 2017
DuplicateSignature:
 package:mysql-server-5.7:5.7.20-0ubuntu0.16.04.1
 Setting up mysql-server-5.7 (5.7.20-0ubuntu0.16.04.1) ...
 update-alternatives: error: alternative path /etc/mysql/mysql.cnf doesn't exist
 dpkg: error processing package mysql-server-5.7 (--configure):
  subprocess installed post-installation script returned error exit status 2
ErrorMessage: subprocess installed post-installation script returned error exit status 2
InstallationDate: Installed on 2017-11-07 (9 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
Logs.var.log.daemon.log:

MySQLConf.etc.mysql.conf.d.mysql.cnf: [mysql]
MySQLConf.etc.mysql.conf.d.mysqldump.cnf:
 [mysqldump]
 quick
 quote-names
 max_allowed_packet = 16M
MySQLConf.etc.mysql.mysql.conf.d.mysqld_safe_syslog.cnf:
 [mysqld_safe]
 syslog
MySQLVarLibDirListing: ['auto.cnf', 'ibdata1', 'performance_schema', 'ib_logfile1', 'autobahn_data', 'ibtmp1', 'ib_buffer_pool', 'ib_logfile0', 'mysql', 'sys', 'debian-5.7.flag']
ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-4.10.0-38-generic.efi.signed root=UUID=9f200e28-f29d-4a7e-9d69-8a90a9945f13 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.2
 apt 1.2.24
SourcePackage: mysql-5.7
Title: package mysql-server-5.7 5.7.20-0ubuntu0.16.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2
UpgradeStatus: No upgrade log present (probably fresh install)

[Robie Basak (racb)]

Thank you for your report.

This looks like a local configuration problem, rather than a bug in Ubuntu. Specifically, /etc/mysql/mysql.cnf has been deleted on your system.

You can find pointers to get help for this sort of problem here: http://www.ubuntu.com/support/community

Since we use this bug tracker to track bugs in Ubuntu, rather than configuration problems, I'm marking this bug as Invalid. This helps us to focus on fixing bugs in Ubuntu.

If you believe that this is really a bug, then you may find it helpful to read "How to report bugs effectively" http://www.chiark.greenend.org.uk/~sgtatham/bugs.html. We'd be grateful if you would then provide a more complete description of the problem, explain why you believe this is a bug in Ubuntu rather than a problem specific to your system, and then change the bug status back to New.