Clear net.ifnames definition
With RHEL8, net.ifnames is set to 0 in the grub config. This is a change in the default image which can have user impacts. We want to clear it to go back to the previously defined behavior in RHEL7. Change-Id: I621066ea5e0e934668ff4c91e991a95d18e019f7 Closes-Bug: #1841441
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These elements are used to build disk images for deploying OpenStack via Heat. They are built as part of the TripleO umbrella project.
Checkout this source tree and also the diskimage builder, export an ELEMENTS_PATH to add elements from this tree, and build any disk images you need:
virtualenv . source bin/activate pip install dib-utils pyyaml git clone https://opendev.org/openstack/diskimage-builder.git git clone https://opendev.org/openstack/tripleo-image-elements.git export ELEMENTS_PATH=tripleo-image-elements/elements diskimage-builder/bin/disk-image-create -u base vm bootstrap local-config stackuser heat-cfntools -a i386 -o bootstrap
Always include heat-cfntools in images that you intend to boot via heat : if that is not done, then the user ssh keys are not reliably pulled down from the metadata server due to interactions with cloud-init.
OpenStack images are intended to be deployed and maintained using Nova + Heat.
As such they should strive to be stateless, maintained entirely via automation.
In a running OpenStack there are several categories of config.
- per user - e.g. ssh key registration with nova: we repeat this sort of config every time we add a user.
- local node - e.g. nova.conf or ovs-vsctl add-br br-ex : settings that apply individually to machines
- inter-node - e.g. credentials on rabbitmq for a given nova compute node
- application state - e.g. 'neutron net-create ...' : settings that apply to the whole cluster not on a per-user / per-tenant basis
Our current heuristic for deciding where to do any particular configuration step:
- per user config should be done from the outside via APIs, even for users like 'admin' that we know we'll have. Note that service accounts are different - they are a form of inter-node configuration.
- local node configuration should be done via ORC driven by Heat and/or configuration management system metadata.
- inter-node configuration should be done by working through Heat. For instance, creating a rabbit account for a nova compute node is something that Heat should arrange, though the act of creating is probably done by a script on the rabbit server - triggered by Heat - and applying the config is done on the compute node by the local node script - again triggered by Heat.
- application state changes should be done from outside via APIs
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