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Deploying and upgrading TripleO with local mirrors

Continued from http://teknoarticles.blogspot.com.es/2017/08/automating-local-mirrors-creation-in.html

In the previous blogpost, I explained how to automate the RHEL mirror creation using https://github.com/redhat-nfvpe/rhel-local-mirrors. Now we are going to learn how to deploy and upgrade TripleO using those.

Deploying TripleO

Undercloud

To use local mirrors in the undercloud, you simply need to get the generated osp<version>.repo that you generated with the rhel-local-mirrors playbook, and copy it to /etc/yum.repos.d/ , in the undercloud host:
sudo curl http://<local_mirror_ip>/osp<version>_repo/osp<version>.repo \
-o /etc/yum.repos.d/osp.repo
Then proceed with the standard instructions for deploy.

Overcloud

Each node from the overcloud (controllers, computes, etc...) needs to have a copy of the repository file from our server where we host the local mirrors. To achieve it, you can include an script that downloads the osp<version>.repo file when deploying.
This can be achieved with Heat templates:
heat_template_version: 2014-10-16
description: >
  File for downloading the repository file from the asset server
resources:
  userdata:
    type: OS::Heat::MultipartMime
    properties:
      parts:
      - config: {get_resource: assetrepo_config}
  assetrepo_config:
    type: OS::Heat::SoftwareConfig
    properties:
      config: |
        #!/bin/bash
        sudo curl http://<local_mirror_ip>/osp<version>_repo/osp<version>.repo -o /etc/yum.repos.d/osp<version>.repo
outputs:
  OS::stack_id:
    value: {get_resource: userdata}

And then creating the environment file that will reference it:
resource_registry:
  OS::TripleO::NodeUserData: /home/stack/templates/asset-repo.yaml

Then you need to include that environment file in your deploy command:
openstack overcloud deploy --templates  -e ~/templates/asset-environment.yaml \
[OTHER OPTIONS]

Upgrading TripleO

Undercloud

To upgrade the undercloud, you need to be sure to disable packages from previous versions, and enable the ones from the new version.
If using local mirrors you may need to remove  the older repo file:
sudo rm /etc/yum.repos.d/osp.repo
And create the new:
sudo curl http://<local_mirror_ip>/osp<version+1>_repo/osp<version+1>.repo -o /etc/yum.repos.d/osp.repo

After that, execute the yum update and openstack undercloud upgrade commands as usual.

Overcloud

To upgrade the overcloud, you need to disable the older repositories and enable the new ones at upgrade time. This is achieved by a parameter that is called UpgradeInitCommand. This needs to contain a custom bash script, that will disable the older repos and enable the new ones, based on your needs.
A sample environment using UpgradeInitCommand can be:
cat > overcloud-repos.yaml <<EOF
parameter_defaults:
  UpgradeInitCommand: |
    set -e
    # REPOSITORY SWITCH COMMANDS GO HERE 
    sudo rm /etc/yum.repos.d/osp.repo
    sudo curl http://<local_mirror_ip>/osp<version+1>_repo/osp<version+1>.repo -o /etc/yum.repos.d/osp.repo 
    EOF

And then execute your upgrade command including that overcloud-repos.yaml file:
openstack overcloud deploy --templates \
    -e <full environment> \
    -e /usr/share/openstack-tripleo-heat-templates/environments/major-upgrade-composable-steps.yaml \
    -e overcloud-repos.yaml
 

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