Getting Started with HashiCorp Nomad - Upgrading Nomad to Newer Versions

The video tutorial covers upgrading Nomad clusters, focusing on in-place and rolling updates. It emphasizes maintaining quorum during server upgrades and outlines steps for client node upgrades. The tutorial provides detailed instructions for both rolling and in-place upgrades, highlighting the importance of validating cluster health and gracefully removing servers. It also advises checking HashiCorp's upgrade guides and release notes for any potential issues or deprecated features.

What are the two main methods for upgrading a Nomad cluster?

• Server-only upgrades and client-only upgrades

• Manual updates and automatic updates

• In-place upgrades and rolling updates

• Full cluster replacement and partial updates

Why is it important to maintain quorum during server upgrades?

• To increase the speed of the upgrade process

• To reduce the number of nodes in the cluster

• To allow for more client nodes to be added

• To ensure the Nomad service remains available

What is the first step in the rolling upgrade process?

• Validate cluster health

• Upgrade client nodes

• Add new servers to the cluster

• Remove old servers from the cluster

During a rolling upgrade, why is it important to gracefully remove old servers?

• To prevent data loss

• To speed up the upgrade process

• To ensure the cluster understands the change

• To reduce server costs

In an in-place upgrade, what is the recommended order for upgrading servers?

• Upgrade the leader first, then the followers

• Upgrade all servers simultaneously

• Upgrade the followers first, then the leader

• Upgrade based on server age

What should you do before upgrading to a new version of Nomad?

• Downgrade to a previous version first

• Check the upgrade guides and release notes

• Ignore the release notes

• Upgrade all nodes at once

What happens if you stop the Nomad service on the leader node during an in-place upgrade?

• A new leader will be elected

• The cluster will shut down

• All nodes will be downgraded

• The upgrade will fail