Hi Andrea,

I have had sleepless nights with the same issue, but eventually figured it out. The two commands I used are below:

1. Backup the configs

engine-backup --scope=all --mode=backup --file=Full --log=Log_Full

2. Restore the configs

engine-backup --mode=restore --file=Full --log=Log_Full --provision-db --provision-dwh-db --restore-permissions

I ran the second command after I built a new HE from scratch. You just need to download the backup files from the original and copy them to the new HE before you restore.

Give it a bash and see if it works for you.

Cheers

Anton Louw

Cloud Engineer: Storage and Virtualization at Vox

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From: Andrea Chierici <andrea.chierici@cnaf.infn.it>
Sent: 14 July 2020 14:54
To: users@ovirt.org
Subject: [ovirt-users] Failing to restore a backup

Dear all,
I'm rather new to the list, not to ovirt, that I use since 2014 profitably.
I've a problem with an ovirt instance and I am desperately seeking for help.

I run a 4.3 self hosted engine installation, with 8 hypervisors and an iscsi storage.
Since the storage is not  very reliable, I bought a dell powervault where to move everything. No problem to move the VMs, the problem came out with the hosted engine.
I've read many documentation and the procedure I think I must follow involves backing up the current HE, powering it off, installing a new host where to create a new HE recovering the backup.
The command I used to generate the backup is:
engine-backup --mode=backup --file=file_name --log=log_file_name

and the command used to restore it on the new HE is:
hosted-engine --deploy --restore-from-file=backup/file_name

The problem comes out during the recovering of the backup.

With versions prior to 4.3.11 and also with 4.4.0 I got the error:
2020-06-25 15:17:34,950+0200 ERROR ansible failed {
    "ansible_host": "localhost",
    "ansible_playbook": "/usr/share/ovirt-hosted-engine-setup/ansible/trigger_role.yml",
    "ansible_result": {
        "_ansible_no_log": false,
        "changed": false,
        "invocation": {
            "module_args": {
                "ca_file": null,
                "compress": true,
                "headers": null,
                "hostname": null,
                "insecure": null,
                "kerberos": false,
                "ovirt_auth": {
                    "ansible_facts": {
                        "ovirt_auth": {
                            "ca_file": null,
                            "compress": true,
                            "headers": null,
                            "insecure": true,
                            "kerberos": false,
                            "timeout": 0,
                            "token": "1f5Zoys35sQmLb2MiEg6bhWm2rDJULFan3eBK0juJJR3S-nXtN_b31jac1sZ0KRz3d1KSDmr8tyf7ExNe_pqJg",
                            "url": "https://ovirt-sgsi.cnaf.infn.it/ovirt-engine/api"
                        }
                    },
                    "attempts": 1,
                    "changed": false,
                    "failed": false
                },
                "password": null,
                "state": "absent",
                "timeout": 0,
                "token": null,
                "url": null,
                "username": null
            }
        },
        "msg": "You must specify either 'url' or 'hostname'."
    },
    "ansible_task": "Always revoke the SSO token",
    "ansible_type": "task",
    "status": "FAILED",
    "task_duration": 3
}


Recently I tried the 4.3.11 beta and 4.4.1 and the error now is different:

[ INFO  ] Upgrading CA\n[ ERROR ] Failed to execute stage 'Misc configuration': (2, 'No such file or directory')\n[ INFO  ] DNF Performing DNF transaction rollback\n

I simply can't figure out what file is missing.
If, as a test, I try to install the HE without restoring the backup, the installation goes smoothly to the end, but at that point I can't restore the backup, as far as I can understand.

Any hint on what I may be missing?
Thanks,
Andrea

-- 
Andrea Chierici - INFN-CNAF                   
Viale Berti Pichat 6/2, 40127 BOLOGNA
Office Tel: +39 051 2095463    
SkypeID ataruz
--