Chapter 15. High availability and clusters

This chapter lists the most notable changes to high availability and clusters between RHEL 8 and RHEL 9.

15.1. Notable changes to high availability and clusters

pcs commands that support the clufter tool have been removed

The pcs commands that support the clufter tool for analyzing cluster configuration formats have been removed. The following commands have been removed:

  • pcs config import-cman for importing CMAN / RHEL6 HA cluster configuration
  • pcs config export for exporting cluster configuration to a list of pcs commands which recreate the same cluster

pcs suppport for OCF Resource Agent API 1.1 standard

The pcs command-line interface now supports OCF 1.1 resource and STONITH agents. As part of the implementation of this support, any agent’s metadata must comply with the OCF schema, whether the agent is an OCF 1.0 or OCF 1.1 agent. If an agent’s metadata does not comply with the OCF schema, pcs considers the agent invalid and will not create or update a resource of the agent unless the --force option is specified. The pcsd Web UI and pcs commands for listing agents now omit agents with invalid metadata from the listing.