3.8. Enabling ports for the High Availability Add-On

TCP 2224

Default pcsd port required on all nodes for node-to-node communication). You can configure the pcsd port by means of the PCSD_PORT parameter in the /etc/sysconfig/pcsd file.

It is crucial to open port 2224 in such a way that pcs from any node can talk to all nodes in the cluster, including itself. When using the Booth cluster ticket manager or a quorum device you must open port 2224 on all related hosts, such as Booth arbitrators or the quorum device host.

TCP 3121

Required on all nodes if the cluster has any Pacemaker Remote nodes

Pacemaker’s pacemaker-based daemon on the full cluster nodes will contact the pacemaker_remoted daemon on Pacemaker Remote nodes at port 3121. If a separate interface is used for cluster communication, the port only needs to be open on that interface. At a minimum, the port should open on Pacemaker Remote nodes to full cluster nodes. Because users may convert a host between a full node and a remote node, or run a remote node inside a container using the host’s network, it can be useful to open the port to all nodes. It is not necessary to open the port to any hosts other than nodes.

TCP 5403

Required on the quorum device host when using a quorum device with corosync-qnetd. The default value can be changed with the -p option of the corosync-qnetd command.

UDP 5404-5412

Required on corosync nodes to facilitate communication between nodes. It is crucial to open ports 5404-5412 in such a way that corosync from any node can talk to all nodes in the cluster, including itself.

TCP 21064

Required on all nodes if the cluster contains any resources requiring DLM (such as GFS2).

TCP 9929, UDP 9929

Required to be open on all cluster nodes and Booth arbitrator nodes to connections from any of those same nodes when the Booth ticket manager is used to establish a multi-site cluster.