Final answer:
To set a site order for a multi-site cluster rolling-restart, you need to use your configuration management tool to specify the restart sequence, considering dependencies and minimizing downtime. Ensure monitoring and have a rollback plan in place. Test the procedure in a non-production environment first.
Step-by-step explanation:
To set a site order when initiating a multi-site cluster rolling restart, you would typically define the order in which clusters should be restarted within your configuration management or orchestration tool that is controlling the restart process. This involves identifying the dependencies between sites and determining an order that minimizes downtime and does not interrupt service availability. For example, if you are using a tool like Ansible, Puppet, Chef, or SaltStack, you would specify the order of the restarts in your playbook, manifest, recipe, or state file, respectively.
In more complex environments with inter-site dependencies, consider initiating the rolling restart in stages, where each stage handles a subset of the sites. You should also have safeguards in place, such as health checks or monitoring to ensure that each site comes back online properly before proceeding to the next one. Always test your rolling restart procedure in a non-production environment before applying it to your production systems.
It's crucial to coordinate with all stakeholders and to have a rollback plan in case something goes wrong during the rolling restart process. Communication and thorough planning are key to a successful multi-site cluster rolling restart.