There’s evil in the air and there’s thunder in sky
– Meatloaf “Bat out of hell”
$ yum install foo
[..]
Error: foo conflicts with bar
Again I have had the dubious pleasure of having dependencies between RPM-packages ending my attempt to install a single package because of a deep-rooted fear of removing core packages from production systems.
I think this most often happen with MySQL or Percona packages, but I am sure MariaDB and a few other will be able to get you into the same situation too. It’s not the first time I have been here.. (If I am not mistaken the problem shows up when you have several major versions of a program available, all providing some of the same functionality to other packages, all being mutually exclusive.)
$ yum install Percona-Server-client-57
Loaded plugins: fastestmirror, priorities
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package Percona-Server-client-57.x86_64 0:5.7.20-19.1.el7 will be installed
--> Processing Dependency: Percona-Server-shared-57 for package: Percona-Server-client-57-5.7.20-19.1.el7.x86_64
--> Running transaction check
---> Package Percona-Server-shared-57.x86_64 0:5.7.20-19.1.el7 will be installed
--> Processing Dependency: Percona-Server-shared-compat-57 for package: Percona-Server-shared-57-5.7.20-19.1.el7.x86_64
--> Running transaction check
---> Package Percona-Server-shared-compat-57.x86_64 0:5.7.20-19.1.el7 will be installed
--> Processing Conflict: Percona-Server-shared-compat-57-5.7.20-19.1.el7.x86_64 conflicts Percona-Server-shared-56
--> Finished Dependency Resolution
Error: Percona-Server-shared-compat-57 conflicts with Percona-Server-shared-56-5.6.38-rel83.0.el7.x86_64
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest
So if I want to install Percona-Server-client-57 I have to install
Percona-Server-shared-compat-57 too, and that I can’t because of the
already installed Percona-Server-shared-56. OK, so I will just remove
Percona-Server-shared-56 and then install
Percona-Server-shared-compat-57 before doing the install I first tried
to do:
$ yum remove Percona-Server-shared-56
[..]
Dependencies Resolved
================================================================================================================
Package Arch Version Repository Size
================================================================================================================
Removing:
Percona-Server-shared-56 x86_64 5.6.38-rel83.0.el7 @percona-release 3.4 M
Removing for dependencies:
MySQL-python x86_64 1.2.5-1.el7 @centos_os 284 k
fail2ban noarch 0.9.7-1.el7 @epel 0.0
fail2ban-sendmail noarch 0.9.7-1.el7 @epel 11 k
perl-DBD-MySQL x86_64 4.023-5.el7 @centos_os 323 k
postfix x86_64 2:2.10.1-6.el7 @centos_os 12 M
redhat-lsb-core x86_64 4.1-27.el7.centos.1 @anaconda 45 k
Transaction Summary
================================================================================================================
Remove 1 Package (+6 Dependent packages)
Installed size: 16 M
Is this ok [y/N]:
Very much not OK. I can live with temporarily removing MySQL-python,
but I’d like to at least keep things with descriptions like this
Description : The Linux Standard Base (LSB) Core module support
: provides the fundamental system interfaces, libraries,
: and runtime environment upon which all conforming
: applications and libraries depend.
The problem seems to be that Postfix needs libmysqlclient.so.18
which is provided by both Percona-Server-shared-56 and
Percona-Server-shared-compat-57. So I just need to swap the former
for the latter, and then I can run my original install.
OK, so I both want to remove a package and install a package. And I want to do it at the same time, so that I don’t have to remove things like redhat-lsb-core. Did you notice the use of the word transaction in Transaction Summary from yum? A transaction is actually what I want. Luckily yum provides a way of doing this, and have probably done since forever, but I didn’t learn about it till today. And as so many times before, it is a shell that solves our problems:
$ yum shell
Loaded plugins: fastestmirror, priorities
> remove Percona-Server-shared-56
> install Percona-Server-shared-compat-57
Loading mirror speeds from cached hostfile
> run
--> Running transaction check
---> Package Percona-Server-shared-56.x86_64 0:5.6.38-rel83.0.el7 will be erased
---> Package Percona-Server-shared-compat-57.x86_64 0:5.7.20-19.1.el7 will be installed
--> Finished Dependency Resolution
==================================================================================================
Package Arch Version Repository Size
==================================================================================================
Installing:
Percona-Server-shared-compat-57 x86_64 5.7.20-19.1.el7 percona-release 1.2 M
Removing:
Percona-Server-shared-56 x86_64 5.6.38-rel83.0.el7 @percona-release 3.4 M
Transaction Summary
==================================================================================================
Install 1 Package
Remove 1 Package
Total download size: 1.2 M
Is this ok [y/d/N]:
Yes, very much thank you! And then finally:
$ yum install Percona-Server-client-57
[..]
Dependencies Resolved
==================================================================================================
Package Arch Version Repository Size
==================================================================================================
Installing:
Percona-Server-client-57 x86_64 5.7.20-19.1.el7 percona-release 7.2 M
Installing for dependencies:
Percona-Server-shared-57 x86_64 5.7.20-19.1.el7 percona-release 747 k
Transaction Summary
==================================================================================================
Install 1 Package (+1 Dependent package)
Total download size: 7.9 M
Installed size: 41 M
Is this ok [y/d/N]:y
[..]
Complete!
Done and done :-)
This post first appeared on my private blog - the version here has some minor tweaks
