In-flight Validations II
Here’s a quick demo for the in-flight validations, with some (edited) cast!
As previously stated, being able to call validations during the deploy/update itself provides a quick way to get early failures, avoiding head scratching and time loss.
This quick demo shows how it can be done easily, with a real validations. It uses the (hopefully) soon-to-be merged new “image-serve” validation and calls it just after the service is configured.
Doing so allows to ensure the configuration is actually working fine. In this demo, the httpd service is stopped before calling the validation, in order to show the early failure occuring even before we actually need that service.
Preparation
You need to build a tripleo-validations package with the new validation.
You can do so using the tripleo-lab.
Once you have built and installed the package, you need to edit tripleo-heat-templates content, in our case:
sudo vim /usr/share/openstack-tripleo-heat-templates/deployment/image-serve/image-serve-baremetal-ansible.yaml
Go to the host_prep_tasks section, and, at the end of the Install,
Configure and Run Apache to serve container images block, insert this:
- name: DEMO - stop httpd
service:
name: httpd
state: stopped
- include_role:
role: image-serve
Of course, the DEMO - stop httpd should not be added on the prod, since it will make the validation fail ;). This entry is only for the demo effect.
Save the edited file, and… Well. That’s it. You have just added a simple validation that will ensure the container image registry is working as expected!
And, after so many words, here’s the
promised cast!
Do you validate this feature/content? ;)