https://blueprints.launchpad.net/fuel/+spec/master-on-centos7
FUEL master nodes up to MOS 7.0 were built on CentOS6 base with many packages rebuild internally even when there are suitable versions available in upstream repositories. This becomes a problem since codebase becomes outdated and there is a growing amount of security patches that must be applied.
Updating master node to CentOS7 solves the following issues:
The proposal is to update all packages that are built internally to versions from CentOS 7 repositories, then rebuild ISO using CentOS7 base repositories and updated internal repository. Since updating the packages will affect some puppet manifests logic they should be updated too.
The way how services on master node and inside docker containers are managed also should be changed in favor of systemd which is a default init system in CentOS7. This should help to make those services unified and managed in the same way. Another advantage is that they become less dependent on docker containers (now many of them are managed by supervisord service, which doesn’t allow them to be moved easily to, say, master node itself).
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Python requirements should be updated to work with versions available in base repo or compatible with OpenStack global requirements.
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Python requirements should be updated to support version available from base repos or be compatible with OpenStack global requirements.
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CentOS 7 uses systemd so puppet manifests should be checked and updated to be compatible:
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There is a separate blueprint that describes update procedure:
https://blueprints.launchpad.net/fuel/+spec/upgrade-master-node-centos7
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CentOS7 uses predictable network interface naming schema, which is covered by network-interfaces-naming-schemes spec.
Developers should update components to support requirements from CentOS7.
QA infrastructure should be updated to support systemd based ISO.
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Fuel Library
Review all the changes tagged with ‘centos7-master-node’ topic, and merge.
Fuel Main
Review all the changes tagged with ‘centos7-master-node’ topic, and merge.
Fuel OSTF
Review all the changes tagged with ‘centos7-master-node’ topic, and merge.
Fuel Astute
Review all the changes tagged with ‘centos7-master-node’ topic, and merge.
Fuel Web
Review all the changes tagged with ‘centos7-master-node’ topic, and merge.
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