Software Collections - CentOS
[Pages:29]Software Collections
Honza Horak
hhorak @ freenode Red Hat, Brno CentOS Dojo 30th Jan 2015
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All versions of any software on your system. Together.
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Software management challenges
Enterprise systems:
Single version of software Not break stuff => no changes in base system
Users want newer versions
New features, testing Apps require specific version that is not in OS
System providers need to offer more versions
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We believe it is possible
..or at least we didn't know it was not :) Focus on RPM world
Easy for packagers Easy to use RPM pros and cons
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Software Collections principles
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Concepts of Software Collections (SCL)
Stacks rather then packages/libraries Python 3.3, MariaDB 10.0, ... Meta package enables the stack Missing deps are included into collection
Collections naming conventions Use "major" version Examples: python33, mariadb100
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Concepts of Software Collections (SCL)
Using /opt, /etc/opt, /var/opt And non-conflicting names RPM metadata Files outside /opt (e.g. SysV init script)
Using vendor under /opt For comply with File Hierarchy Standard Example: /opt/rh, /opt/fedora, /opt/centos
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Technology behind SCL scl-utils available in CentOS/RHEL
Building support (scl-utils-build) Run-time support
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