Ansible precheck tasks
There are many scenarios that can cause a deploy to fail. We can't fix all of these inline with the playbook runs, but we can check their presents _before_ we deploy. The work items listed below should be explanatory to the type of things we will be checking.
There are a few things we can do with the information we get. We can attempt to solve them (stopping services, cleaning up files, modprobing etc) or fail and inform the user so they can take action.
Blueprint information
- Status:
- Complete
- Approver:
- Sam Yaple
- Priority:
- Medium
- Drafter:
- Sam Yaple
- Direction:
- Approved
- Assignee:
- Vladislav Belogrudov
- Definition:
- Approved
- Series goal:
- Accepted for newton
- Implementation:
-
Implemented
- Milestone target:
-
newton-3
- Started by
- Sam Yaple
- Completed by
- Steven Dake
Related branches
Related bugs
Sprints
Whiteboard
View the ironic neutron check for an example of the config precheck we could do. --SamYaple
http://
Docker service - do we stick to the idea of standard install, i.e. checking service via cli 'service'? 'service' module of Ansible is not useful in this context because it is disruptive. --vbel
libvirt service can be trickier to detect because one can run it with local socket - /var/run/
what would be the file hierarchy to do these checks? precheck.yml beside site.yml? or precheck folder? precheck can include main.yml + ports.yml, sockets.yml, services.yml, etc. --vbel
We also need to check if kvm module is loaded on the compute nodes. -- Hui
We could just modprobe kvm in start up script though I would make a more sophisticated check that kvm really is wanted (thinking about xen, hyperv, esxi) --vbel
Do we need to install like pip, docker-py as in the requirement.txt? I think it would be nice to build a system from scratch. - Hui
Please keep the status of the work items up to date vbel. --sdake
moving to newton-3 expected to be released on 2016-09-02. Please try to finish it before that otherwise it will be moved to Octata. - coolsvap
Gerrit topic: https:/
Addressed by: https:/
Add playbook for hosts pre-deployment checks (ports, services)
Gerrit topic: https:/
Addressed by: https:/
prechecks: check ansible version on deployment host
Addressed by: https:/
Update docker and docker-py reqs
Addressed by: https:/
prechecks: remove the docker max version check
Work Items
Work items:
Check if ports are in-use for all services: DONE
Ensure Docker and docker-py are installed and the appropriate versions: DONE
Ensure Docker service is running: DONE
Ensure config options are set/non-
