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October 2017

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172 discussions

DR with oVirt: no data on OVF_STORE
by Luca 'remix_tj' Lorenzetto 01 Oct '17

01 Oct '17

Hello, i'm experimenting a DR architecture that involves block storage replication from the storage side (EMC VNX 8000). Our idea is to import the replicated data storage domain on another datacenter, managed by another engine, with the option "Import Domain" and then import all the vms contained. The idea works, but we encountered an issue that we don't want to have again: we imported an SD and *no* vm were listed in the tab "VM Import". Disks were available, but no VM informations. What we did: - on storage side: split the replica between the main disk in Site A and the secondary disk Site B - on storage side: added the disk to the storage group of the "recovery" cluster - from engine UI: Imported storage domain, confirming that i want to activate even if seems to be attached to another DC - from engine UI: move out from maintenance the storage domain and click on the "VM Import" tab of the new SD. What happened: *no* vm were listed To identify better what's happening, I've found here some indications on how lvm for block storage works and I identified the command on how to find and read the OVF_STORE. Looking inside the OVF_STORE has shown why no vm were listed: it was empty (no .ovf file listed with tar tvf) So, without the possibility import vms, i did a rollback, detaching the storage domain and re-establishing the replication between the main site and the DR site. Then, after a day of replications (secondary volume is aligned every 30 minutes), i tried again and i've been able to import also vms (OVF_STORE was populated). So my question is: how to i force to have OVF_STORE to be aligned at least as frequent as the replication? I want to have the VM disks replicated to the remote site along with VM OVF informations. Is possible to have OVF_STORE informations aligned when a VM is created/edited or with a scheduled task? Is this so I/O expensive? Thank you, Luca -- "E' assurdo impiegare gli uomini di intelligenza eccellente per fare calcoli che potrebbero essere affidati a chiunque se si usassero delle macchine" Gottfried Wilhelm von Leibnitz, Filosofo e Matematico (1646-1716) "Internet è la più grande biblioteca del mondo. Ma il problema è che i libri sono tutti sparsi sul pavimento" John Allen Paulos, Matematico (1945-vivente) Luca 'remix_tj' Lorenzetto, http://www.remixtj.net , <lorenzetto.luca(a)gmail.com>

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oVirt 4.2 hosted-engine command damaged
by Julián Tete 01 Oct '17

01 Oct '17

I updated my lab environment from oVirt 4.1.x to oVirt 4.2 Alpha The hosted-engine command has been corrupted An example: hosted-engine --vm-status Traceback (most recent call last): File "/usr/lib64/python2.7/runpy.py", line 162, in _run_module_as_main "__main__", fname, loader, pkg_name) File "/usr/lib64/python2.7/runpy.py", line 72, in _run_code exec code in run_globals File "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_setup/vm_status.py", line 213, in <module> if not status_checker.print_status (): File "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_setup/vm_status.py", line 110, in print_status all_host_stats = self._get_all_host_stats () File "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_setup/vm_status.py", line 75, in _get_all_host_stats all_host_stats = ha_cli.get_all_host_stats () File "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/client/client.py", line 154, in get_all_host_stats return self.get_all_stats (self.StatModes.HOST) File "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/client/client.py", line 99, in get_all_stats stats = broker.get_stats_from_storage (service) File "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/lib/brokerlink.py", line 147, in get_stats_from_storage for host_id, data in six.iteritems (result): File "/usr/lib/python2.7/site-packages/six.py", line 599, in iteritems return d.iteritems (** kw) AttributeError: 'NoneType' object has no attribute 'iteritems' hosted-engine --set-maintenance --mode = none Traceback (most recent call last): File "/usr/lib64/python2.7/runpy.py", line 162, in _run_module_as_main "__main__", fname, loader, pkg_name) File "/usr/lib64/python2.7/runpy.py", line 72, in _run_code exec code in run_globals File "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_setup/set_maintenance.py", line 88, in <module> if not maintenance.set_mode (sys.argv [1]): File "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_setup/set_maintenance.py", line 76, in set_mode value = m_global, File "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/client/client.py", line 240, in set_maintenance_mode str (value)) File "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/client/client.py", line 187, in set_global_md_flag all_stats = broker.get_stats_from_storage (service) File "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/lib/brokerlink.py", line 147, in get_stats_from_storage for host_id, data in six.iteritems (result): File "/usr/lib/python2.7/site-packages/six.py", line 599, in iteritems return d.iteritems (** kw) AttributeError: 'NoneType' object has no attribute 'iteritems' hosted-engine --vm-start VM exists and its status is Up Hardware Manufacturer: HP Family: ProLiant Product Name: ProLiant BL460c Gen8 CPU Model Name: Intel (R) Xeon (R) CPU E5-2667 v2 @ 3.30GHz CPU Type: Intel SandyBridge Family CPU Sockets: 2 CPU Cores per Socket: 8 CPU Threads per Core: 2 (SMT Enabled) Software: OS Version: RHEL - 7 - 4.1708.el7.centos OS Description: CentOS Linux 7 (Core) Kernel Version: 4.12.0 - 1.el7.elrepo.x86_64 KVM Version: 2.9.0 - 16.el7_4.5.1 LIBVIRT Version: libvirt-3.2.0-14.el7_4.3 VDSM Version: vdsm-4.20.3-95.git0813890.el7.centos SPICE Version: 0.12.8 - 2.el7.1 GlusterFS Version: glusterfs-3.12.1-2.el7 CEPH Version: librbd1-0.94.5-2.el7

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