37 lines
1.4 KiB
Markdown
37 lines
1.4 KiB
Markdown
---
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layout: "guides"
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page_title: "Federating a Nomad Cluster"
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sidebar_current: "guides-cluster-federation"
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description: |-
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Learn how to join Nomad servers across multiple regions so users can submit
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jobs to any server in any region using global federation.
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---
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# Federating a Cluster
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Because Nomad operates at a regional level, federation is part of Nomad core.
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Federation enables users to submit jobs or interact with the HTTP API targeting
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any region, from any server, even if that server resides in a different region.
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Federating multiple Nomad clusters requires network connectivity between the
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clusters. Servers in each cluster must be able to communicate over [RPC and
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Serf][ports]. Federated clusters are expected to communicate over WANs, so they
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do not need the same low latency as servers within a region.
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Once Nomad servers are able to connect, federating is as simple as joining the
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servers. From any server in one region, issue a join command to a server in a
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remote region:
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```shell
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$ nomad server-join 1.2.3.4:4648
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```
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Note that only one join command is required per region. Servers across regions
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discover other servers in the cluster via the gossip protocol and hence it's
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enough to join just one known server.
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If bootstrapped via Consul and the Consul clusters in the Nomad regions are
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federated, then federation occurs automatically.
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[ports]: /guides/cluster/requirements.html#ports-used
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