openstack/openstack-ansible-galera_server

Logan V 149076cd2c Reimplement external LB management handler hook

Based on conversation on an ansible issue[1], I implemented
a LB orchestration role[2] similar to the POC here[3].

This will allow external loadbalancer management roles to hook
into a universal notify listener "Manage LB" to perform before/
after endpoint management actions when the service is being
restarted.

[1]: https://github.com/ansible/ansible/issues/27813
[2]: https://github.com/Logan2211/ansible-haproxy-endpoints
[3]: https://github.com/Logan2211/tmp-ansible-27813

This reverts commit f876cf2926d5a80bd4e8b3acd6da2e9553b98e8f.

Change-Id: Ib17c9ae6f5e75ce2288d52f6368cd40e9586ffdb

2017-09-10 17:05:30 -05:00

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OpenStack-Ansible Galera server

Ansible role to install and configure a Galera cluster powered by MariaDB

To clone or view the source code for this repository, visit the role repository for galera_server.

Default variables

../../defaults/main.yml

Required variables

To use this role, define the following variables:

galera_root_password: secrete

Example playbook

../../examples/playbook.yml

External Restart Hooks

When the role performs a restart of the mariadb service, it will notify an Ansible handler named Manage LB, which is a noop within this role. In the playbook, other roles may be loaded before and after this role which will implement Ansible handler listeners for Manage LB, that way external roles can manage the load balancer endpoints responsible for sending traffic to the MariaDB servers being restarted by marking them in maintenance or active mode, draining sessions, etc. For an example implementation, please reference the ansible-haproxy-endpoints role used by the openstack-ansible project.

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