Configuring GitHub Enterprise Server for high availability
GitHub Enterprise Server supports a high availability mode of operation designed to minimize service disruption in the event of hardware failure or major network outage affecting the primary appliance.
About high availability configuration
In a high availability configuration, a fully redundant secondary GitHub Enterprise Server appliance is kept in sync with the primary appliance through replication of all major datastores.
Creating a high availability replica
In an active/passive configuration, the replica appliance is a redundant copy of the primary appliance. If the primary appliance fails, high availability mode allows the replica to act as the primary appliance, allowing minimal service disruption.
Initiating a failover to your replica appliance
You can failover to a GitHub Enterprise Server replica appliance using the command line for maintenance and testing, or if the primary appliance fails.
Recovering a high availability configuration
After failing over to a GitHub Enterprise Server appliance, you should regain redundancy as soon as possible rather than rely on a single appliance.
Removing a high availability replica
You can stop replication to a GitHub Enterprise Server replica temporarily, or permanently remove replication.
Geo-replication on GitHub Enterprise Server uses multiple active replicas to fulfill requests from geographically distributed data centers.