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Adding Standbys

You can add standbys to an RCS at any time.

Warning

The primary cluster must be correctly configured and Online.

Data or WAL on another disk

A standby is built at its primary's data directory and WAL directory paths. When the primary keeps either on a dedicated disk, mount the same disk at the same point, declared in /etc/fstab, on every new standby Host first — see Placing the data directory on another disk and Placing the WAL on another disk. Muppy creates the directories on the standby.

From the RCS form (Muppy / Databases / PostgreSQL / Replicated Cluster Set (RCS)), click Add Standbys.

The Add Standbys wizard

In Standbys to Setup, list the Hosts that will run the new replicas. Any Host in state Managed (merely Enrolled) works — Muppy installs everything it needs.

Click Launch. The setup runs in the background.