dnf failed to update ruby package from 2.7 module stream in RHEL 8

Solution Verified - Updated -

Environment

Red Hat Enterprise Linux 8

Issue

  • While trying to update ruby package from 2.7 module stream , following errors are observed:

    # dnf update ruby.x86_64
Updating Subscription Management repositories.
...

Error:
Problem: problem with installed package libselinux-ruby-2.9- 
5.el8.x86_64
- package libselinux-ruby-2.9-5.el8.x86_64 requires libruby.so.2.5() 
(64bit), but none of the providers can be installed
- cannot install both ruby-libs-2.7.4- 
137.module+el8.4.0+12025+f744ca41.x86_64 and ruby-libs-2.5.9-107.module+el8.4.0+10822+fe4fffb1.x86_64
- package ruby-2.7.4-137.module+el8.4.0+12025+f744ca41.x86_64 requires ruby-libs(x86-64) = 2.7.4-137.module+el8.4.0+12025+f744ca41, but none of the providers can be installed
- cannot install the best update candidate for package ruby-2.5.9-107.module+el8.4.0+10822+fe4fffb1.x86_64
- package ruby-libs-2.5.3-104.module+el8.0.0+3250+4b7d6d43.x86_64 is filtered out by modular filtering
- package ruby-libs-2.5.5-105.module+el8.1.0+3656+f80bfa1d.x86_64 is filtered out by modular filtering
- package ruby-libs-2.5.3-103.module+el8+2671+ebcc7ee0.x86_64 is filtered out by modular filtering
- package ruby-libs-2.5.5-106.module+el8.3.0+7153+c6f6daa5.x86_64 is filtered out by modular filtering
- package ruby-libs-2.5.9-107.module+el8.4.0+10822+fe4fffb1.x86_64 is filtered out by modular filtering
(try to add '--allowerasing' to command line to replace conflicting packages or '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages)

Resolution

  • Ensure that 2.7 module stream of ruby package is already enabled on RHEL 8 server. For more information about how to switch module stream please refer to the article .

  • If 2.7 module stream of ruby package is enabled in the system, take a snapshot/backup of the server and execute the following command.

    # yum clean all
# yum --allowerasing distro-sync ruby.x86_64
# yum update ruby.x86_64

Root Cause

While attempting to upgrade the ruby package,ruby-2.7.4-137.module requires ruby-libs(x86-64) = 2.7.4, however ruby-libs-2.5.9-107.module is not getting removed automatically by dnf.
Here the use of using --allowerasing option with yum\dnf command will allow resolving the dependency explicitly and help with the removal of the older dependent package.

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