Hello,

my engine is 4.4.3.12-1.el8 and my 3 oVirt nodes (based on plain CentOS due to megaraid_sas kernel module needed) have been updated, bringing them to CentOS 8.3.

But if I try to put cluster into 4.5 I get the error:

Error while executing action: Cannot change Cluster Compatibility Version to higher version when there are active Hosts with lower version.

-Please move Host ov300, ov301, ov200 with lower version to maintenance first.

Do I have to wait until final 4.4.4 or what is the problem?

Does 4.5 gives anything more apart the second number... (joking..)?

On nodes:

Software

OS Version: RHEL - 8.3 - 1.2011.el8
OS Description: CentOS Linux 8
Kernel Version: 4.18.0 - 240.1.1.el8_3.x86_64
KVM Version: 4.2.0 - 34.module_el8.3.0+555+a55c8938
LIBVIRT Version: libvirt-6.0.0-28.module_el8.3.0+555+a55c8938
VDSM Version: vdsm-4.40.35.1-1.el8
SPICE Version: 0.14.3 - 3.el8
GlusterFS Version: [N/A]
CEPH Version: librbd1-12.2.7-9.el8
Open vSwitch Version: [N/A]
Nmstate Version: nmstate-0.3.6-2.el8
Kernel Features: MDS: (Vulnerable: Clear CPU buffers attempted, no microcode; SMT vulnerable), L1TF: (Mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable), SRBDS: (Not affected), MELTDOWN: (Mitigation: PTI), SPECTRE_V1: (Mitigation: usercopy/swapgs barriers and __user pointer sanitization), SPECTRE_V2: (Mitigation: Full generic retpoline, IBPB: conditional, IBRS_FW, STIBP: conditional, RSB filling), ITLB_MULTIHIT: (KVM: Mitigation: Split huge pages), TSX_ASYNC_ABORT: (Not affected), SPEC_STORE_BYPASS: (Mitigation: Speculative Store Bypass disabled via prctl and seccomp)
VNC Encryption: Disabled
FIPS mode enabled: Disabled

Gianluca