XtraDB Cluster Versions

MySQL & MariaDB Percona XtraDB Cluster 8.x
1

One of my servers went down and I am bringing on another node. However the admin can only install the most up to date software which is currently mysql Ver 8.0.29-21.1 for Linux on x86_64 (Percona XtraDB Cluster (GPL), Release rel21, Revision 250bc93, WSREP version 26.4.3)

Is the above compatible with mysql Ver 8.0.27-18.1 Percona XtraDB Cluster (GPL), Release rel18, Revision ac35177, WSREP version 26.4.3?

2

You should be fine, however it is recommended that you upgrade the 8.0.27 nodes to match as soon as possible.