Good Day

I have been trying to upgrade a clients oVirt from 3.6 to 4.0 but have run into an issue where I am unable to change the cluster and data center compatibility version.

I get the following error in the GUI:

Ovirt: Some of the hosts still use legacy protocol which is not supported by cluster 3.6 or higher. In order to change it a host needs to be put to maintenance and edited in advanced options section.

This error was received with all VM's off and all hosts in maintenance.

The environment has the following currently installed:

Engine - CentOS 7.4 - Ovirt Engine 3.6.7.5

Host1 - CentOS 6.9 - VDSM 4.16.30

Host2 - CentOS 6.9 - VDSM 4.16.30

Host3 - CentOS 6.9 - VDSM 4.16.30

I also have the following from engine.log

[root@ovengine ~]# tail -f /var/log/ovirt-engine/engine.log
2018-09-22 07:11:33,920 INFO [org.ovirt.engine.core.vdsbroker.VmsStatisticsFetcher] (DefaultQuartzScheduler_Worker-93) [7533985f] Fetched 0 VMs from VDS 'd82a026c-31b4-4efc-8567-c4a6bdcaa826'
2018-09-22 07:11:34,685 INFO [org.ovirt.engine.core.vdsbroker.vdsbroker.DisconnectStoragePoolVDSCommand] (DefaultQuartzScheduler_Worker-99) [4b7e3710] FINISH, DisconnectStoragePoolVDSCommand, log id: 1ae6f0a9
2018-09-22 07:11:34,687 INFO [org.ovirt.engine.core.bll.storage.DisconnectHostFromStoragePoolServersCommand] (DefaultQuartzScheduler_Worker-99) [2a6aa6f6] Running command: DisconnectHostFromStoragePoolServersCommand internal: true. Entities affected : ID: 5849b030-626e-47cb-ad90-3ce782d831b3 Type: StoragePool
2018-09-22 07:11:34,706 INFO [org.ovirt.engine.core.vdsbroker.vdsbroker.DisconnectStorageServerVDSCommand] (DefaultQuartzScheduler_Worker-99) [2a6aa6f6] START, DisconnectStorageServerVDSCommand(HostName = ovhost3, StorageServerConnectionManagementVDSParameters:{runAsync='true', hostId='d82a026c-31b4-4efc-8567-c4a6bdcaa826', storagePoolId='5849b030-626e-47cb-ad90-3ce782d831b3', storageType='NFS', connectionList='[StorageServerConnections:{id='3fdffb4c-250b-4a4e-b914-e0da1243550e', connection='172.16.0.10:/raid0/data/_NAS_NFS_Exports_/STORAGE1', iqn='null', vfsType='null', mountOptions='null', nfsVersion='null', nfsRetrans='null', nfsTimeo='null', iface='null', netIfaceName='null'}, StorageServerConnections:{id='4d95c8ca-435a-4e44-86a5-bc7f3a0cd606', connection='172.16.0.20:/data/ov-export', iqn='null', vfsType='null', mountOptions='null', nfsVersion='null', nfsRetrans='null', nfsTimeo='null', iface='null', netIfaceName='null'}, StorageServerConnections:{id='82ecbc89-bdf3-4597-9a93-b16f3a6ac117', connection='172.16.0.11:/raid1/data/_NAS_NFS_Exports_/4TB', iqn='null', vfsType='null', mountOptions='null', nfsVersion='null', nfsRetrans='null', nfsTimeo='null', iface='null', netIfaceName='null'}, StorageServerConnections:{id='29bb3394-fb61-41c0-bb5a-1fa693ec2fe2', connection='172.16.0.11:/raid1/data/_NAS_NFS_Exports_/iso', iqn='null', vfsType='null', mountOptions='null', nfsVersion='V3', nfsRetrans='null', nfsTimeo='null', iface='null', netIfaceName='null'}]'}), log id: 48c5ffd6
2018-09-22 07:11:34,991 INFO [org.ovirt.engine.core.vdsbroker.vdsbroker.DisconnectStorageServerVDSCommand] (DefaultQuartzScheduler_Worker-99) [2a6aa6f6] FINISH, DisconnectStorageServerVDSCommand, return: {3fdffb4c-250b-4a4e-b914-e0da1243550e=0, 29bb3394-fb61-41c0-bb5a-1fa693ec2fe2=0, 82ecbc89-bdf3-4597-9a93-b16f3a6ac117=0, 4d95c8ca-435a-4e44-86a5-bc7f3a0cd606=0}, log id: 48c5ffd6
2018-09-22 07:11:56,367 WARN [org.ovirt.engine.core.bll.UpdateVdsGroupCommand] (default task-29) [1a31cc53] CanDoAction of action 'UpdateVdsGroup' failed for user admin@internal. Reasons: VAR__TYPE__CLUSTER,VAR__ACTION__UPDATE,ACTION_TYPE_FAILED_WRONG_PROTOCOL_FOR_CLUSTER_VERSION
2018-09-22 07:12:41,017 WARN [org.ovirt.engine.core.bll.storage.UpdateStoragePoolCommand] (default task-29) [efd285b] CanDoAction of action 'UpdateStoragePool' failed for user admin@internal. Reasons: VAR__TYPE__STORAGE__POOL,VAR__ACTION__UPDATE,$ClustersList Default,ERROR_CANNOT_UPDATE_STORAGE_POOL_COMPATIBILITY_VERSION_BIGGER_THAN_CLUSTERS
2018-09-22 07:13:15,717 WARN [org.ovirt.engine.core.bll.UpdateVdsGroupCommand] (default task-6) [4c9f3ee8] CanDoAction of action 'UpdateVdsGroup' failed for user admin@internal. Reasons: VAR__TYPE__CLUSTER,VAR__ACTION__UPDATE,ACTION_TYPE_FAILED_WRONG_PROTOCOL_FOR_CLUSTER_VERSION
2018-09-22 07:15:21,460 WARN [org.ovirt.engine.core.bll.UpdateVdsGroupCommand] (default task-28) [649bae65] CanDoAction of action 'UpdateVdsGroup' failed for user admin@internal. Reasons: VAR__TYPE__CLUSTER,VAR__ACTION__UPDATE,ACTION_TYPE_FAILED_WRONG_PROTOCOL_FOR_CLUSTER_VERSION
2018-09-22 07:18:44,633 WARN [org.ovirt.engine.core.bll.UpdateVdsGroupCommand] (default task-8) [23167cfd] CanDoAction of action 'UpdateVdsGroup' failed for user admin@internal. Reasons: VAR__TYPE__CLUSTER,VAR__ACTION__UPDATE,ACTION_TYPE_FAILED_WRONG_PROTOCOL_FOR_CLUSTER_VERSION
2018-09-22 07:24:20,372 WARN [org.ovirt.engine.core.bll.UpdateVdsGroupCommand] (default task-15) [5d2ce633] CanDoAction of action 'UpdateVdsGroup' failed for user admin@internal. Reasons: VAR__TYPE__CLUSTER,VAR__ACTION__UPDATE,ACTION_TYPE_FAILED_WRONG_PROTOCOL_FOR_CLUSTER_VERSION

I would appreciate some advice in resolving this.

Thanks