Nomad Multi-Region Federation
Federate two independent Nomad regions into a single WAN gossip pool, then target and query any region from any server.
Lab Overview
Nomad operates at a regional level and provides first-class support for federation, which lets you submit jobs or interact with the Nomad HTTP API targeting any region, from any server, even if that server resides in a different region.
In this lab you'll work with two Nomad clusters, a "west" region and an "east" region, each with one server and two clients. You'll verify the health of each region independently, then federate them into a single WAN gossip pool with the nomad server join command. Once federated, you'll see every region's servers from either side and query one region's jobs from the other using the -region flag.
This lab runs entirely on Nomad and Consul Community Edition. Note that deploying a single job across federated regions with the multiregion job stanza is a Nomad Enterprise feature and is therefore out of scope here.
We suggest running the Nomad Basics, Nomad Simple Cluster, and Nomad Multi-Server Cluster labs before this one.
What You'll Learn
Verify the health of two independent Nomad regions with nomad node status and nomad server members
Federate two Nomad regions into one WAN gossip pool using nomad server join over the Serf WAN port
Confirm that every region's servers are visible from either region after federation
Query and target a remote region from any server using the -region flag
Understand why the multiregion job stanza requires Nomad Enterprise
Prerequisites
nomad-basics
nomad-simple-cluster
nomad-multi-server-cluster
linux-command-line
Technologies Covered
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