cluster_ssh.diviner
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	@title Cluster: SSH Servers
	@group cluster

	Configuring Phabricator to use multiple SSH servers.

	Overview
	========

	You can run Phabricator on multiple SSH servers. The advantages of doing this
	are:

	- you can completely survive the loss of multiple SSH hosts.

	This configuration is simple, but you must configure repositories first. For
	details, see @{article:Cluster: Repositories}.

	SSH servers accept SSH requests from commands like `git clone` and relay them
	to hosts that can serve the requests.


	Adding SSH Hosts
	================

	After configuring repositories in cluster mode, you can add more web hosts
	at any time.

	First, deploy the Phabricator software and configuration to a host, then
	register the host as a cluster device if it is not already registered (for
	help, see @{article:Cluster: Devices}.)

	Once the host is registered, start the SSH server, and then add the host to the
	SSH load balancer pool.

	Phabricator SSH servers are stateless, so you can pull them in and out of
	production freely.

	You may also want to run web services on these hosts, since the service is very
	similar to SSH, also stateless, and it may be simpler to load balance the
	services together. For details, see @{article:Cluster: Web Servers}.


	Next Steps
	==========

	Continue by:

	- returning to @{article:Clustering Introduction}.