Remove CentOS bootstrap from Fuel

https://blueprints.launchpad.net/fuel/+spec/remove-centos-bootstrap-from-fuel

Problem description

At the moment we build Centos bootstrap OS image together with ISO and then package it into rpm. Since Fuel 8.0 we switched to Ubuntu bootstrap image usage [1] and CentOS one became deprecated, so in Fuel 9.0 we can freely remove it [2].

By removing fuel-bootstrap-image [2] we:

• simplify patching/update story, since we don’t need to rebuild/deliver this package on changes in dependent packages [3].
• speed-up ISO build process, since building centos bootstrap image takes ~ 20% of build-iso time.

Proposed changes

Remove CentOS bootstrap image usage from Fuel projects.

Web UI

None

Nailgun

Data model

None

REST API

None

Orchestration

RPC Protocol

None

Fuel Client

None

Plugins

None

Fuel Library

• CentOS cobbler profiles should be removed from fuel-library code
• The default bootstrap_profile should be set to ubuntu_bootstrap

Alternatives

Currently we build Ubuntu bootstrap OS image on the master node using Fuel Agent. Although Fuel Agent does not support building Centos images we can implement such functionality.

We need to implement build image utilities for Centos and modify Fuel Agent build image manager method and probably input data driver so as to make it possible to use Fuel Agent to build Centos images.

Upgrade impact

We no longer need to deliver/update fuel-bootstrap-image package [2], this will simplify patching/update story, since we don’t need to rebuild this package on each changes in any dependent packages [3]:

• fuel-agent;
• nailgun-agent;
• nailgun-mcagents;
• network-checker;
• rubygem-ffi-yajl;
• rubygem-ffi;
• rubygem-mime-types;
• rubygem-mixlib-shellout;
• rubygem-wmi-lite.

Security impact

None

Notifications impact

None

End user impact

None

Performance impact

• ISO build time decreased at least for ~20%
• The OpenStack nodes themselves are not affected in any way

Deployment impact

• CentOS bootstrap image profile should be removed from cobbler
• CentOS flavour should be removed from fuel-menu

Developer impact

None

Infrastructure impact

None

Documentation impact

Changes should be reflected in documentation.

Implementation

Assignee(s)

Primary assignee:

Sergey Kulanov

Work Items

• Remove CentOS bootstrap image selection from fuel-menu
• Switch to Ubuntu bootstrap in fuel-library
• Remove fuel-bootstrap-image [2]
• Remove related code from fuel-qa and fuel-devops

Dependencies

None

Testing, QA

Related changes should be made in fuel-devops and fuel-qa since bootstrap.rsa key file will no longer exist

Acceptance criteria

• ISO should pass QA acceptance criteria (SWARM % pass)
• User should not ba able to use CentOS bootstrap image

References

[1]	Use Ubuntu as an operating system of Fuel bootstrap nodes

[2]	(1, 2, 3) fuel-bootstrap-image RPM package spec

[3]	(1, 2) fuel-bootstrap-image dependencies