Nir, thanks for this. it works.I think it would be great if the hostid could be set in vdsm.conf and then reflected in ovirt engine db
During my search for the host id somewhere on the host i also found a number of undocumented features. I.e. there seems to be a way to use patterns in vdsm.conf to exclude certain interfaces or vlans.
I could not find detailed documentation on these items. If there is a need for help on documentation i am happy to chip in. Just tell me where you would like me to start. Keep up the good work and thanks Joost Nir Soffer schreef op 2016-12-16 23:35:
On Fri, Dec 16, 2016 at 9:15 PM, <jo...@familiealbers.nl> wrote:HI Nir, this is exactly what i am doing. connectStoragePool(storagePoolUuid,hostid,'',masterStorageDomainUuid,masterVersion)What i want however is to ensure i can i.e. start vms even when the engine is not available and then make sure they keep running when the engine comesonline. If the hostid's mismatch all kinds of errors popup.If the hostids i use when calling connectStoragePool match those in theengine db my vms keep on running.its an awkward setup , i know but it would be really good if i can find outthe host id the engine has in mind.This way i can use this particular hostid when calling connectStoragepool.also.Another reason for wanting this functionality is due to the fact the engine might be unreachable by the hosts for a few hours due to the fact my dc'ssometimes run without network.Interesting use case. What if you use hosted engine, so it is in the same network as the hosts?I thought about persisting the host id on the host long time ago, but neverhad a good use for this, and your case is a good use case.Here is a patch persisting the host id in /var/lib/vdsm/storage/host_id.You will need to modify it a bit for older versions. https://gerrit.ovirt.org/68666 NirNir Soffer schreef op 2016-12-16 17:48:On Fri, Dec 16, 2016 at 6:15 PM, <jo...@familiealbers.nl> wrote:Hi Nir, thanks.I am actually after cases where the storagepool is not mounted.And enginecan not reach vdsm. I can mount it using the vdsm api however i need to use a hostid. I cant find where to get the particular id from.at the moment, when i manually connect the storage pool (using vdsm api)iget end up with the following errors as soon as the connection betweenengine and vdsm is created. jsonrpc.Executor/6::ERROR::2016-12-1616:01:57,131::dispatcher::77::Storage.Dispatcher::(wrapper) {'status': {'message': "Cannot perform action while storage pool is connected:('hostId=1, newHostId=2',)", 'code': 325}}Not sure what you mean but storagepool not mounted. To work with stoage, you need to - connectStorageServer - connectStoragePool You can the command engine sends when activating a host, and send the same commands from vdsClient or vdscli.py.If your host is connected to the storage, and sanlock is connected joinedthe lockspace, you can get the host id using sanlock apis. # sanlock client status daemon 82322b57-58f9-4b9a-9661-8489ab66bc86.voodoo6.tl p -1 helper p -1 listener p 4271 p -1 status s 16fe0625-be29-4a77-81c5-1bc0e5267eea:1:/dev/16fe0625-be29-4a77-81c5-1bc0e5267eea/ids:0 s eeb8e812-4e69-469a-a07a-272ea3a79105:1:/dev/eeb8e812-4e69-469a-a07a-272ea3a79105/ids:0 r eeb8e812-4e69-469a-a07a-272ea3a79105:SDM:/dev/eeb8e812-4e69-469a-a07a-272ea3a79105/leases:1048576:7 p 4271 In this case I have 2 locksapces and both use host_id = 1 If you are not connected to storage on this host, you can use any available host_id. You can see which hosts are connected using: # sanlock client host_status -D lockspace 16fe0625-be29-4a77-81c5-1bc0e5267eea 1 timestamp 380593 last_check=380614 last_live=380614 last_req=0 owner_id=1 owner_generation=15 timestamp=380593 io_timeout=10 owner_name=82322b57-58f9-4b9a-9661-8489ab66bc86.voodoo6.tl lockspace eeb8e812-4e69-469a-a07a-272ea3a79105 1 timestamp 380592 last_check=380613 last_live=380613 last_req=0 owner_id=1 owner_generation=5 timestamp=380592 io_timeout=10 owner_name=82322b57-58f9-4b9a-9661-8489ab66bc86.voodoo6.tl In this case I have one host (host_id 1), connected to 2 lockspaces(each storage domain have one lockspace using the storage domain uuid)If you want to connect this host to engine, you should use the host idfrom engine database.following this its a cluster of errors, gluster restarts and complainsabout quorum etc etcif i'd redo the commands after reboot (still no connection between vdsmapiapi and engine and use host id 2 on this particular host my problems areresolved.also am i right in thinking the values in the db do not change as long asthe hosts remain the same?It would really help me immense to find out the host id before conenctingto the storagepool and without needed to go into the db. thanks. Joost Nir Soffer schreef op 2016-12-16 16:42:On Fri, Dec 16, 2016 at 5:20 PM, <jo...@familiealbers.nl> wrote:in ovirt engine the table. vds_spm_id_map holds the ids used in spm election. engine_20150824095956=# select * from vds_spm_id_map ; storage_pool_id | vds_spm_id | vds_id --------------------------------------+------------+-------------------------------------- 144fb47d-b38c-4bb7-867b-373d7ba9f0a9 | 1 | 313ed02c-8029-4fb3-ba1c-5b3c9902ddb1 144fb47d-b38c-4bb7-867b-373d7ba9f0a9 | 2 | 7fdebf8a-1503-4b54-9681-0201ee330381these particular id's seem to be added when a vds is added to theengine or when the storage pool is first setup.I would like to be able to obtain this nr (in my case its generally 1or 2as i have two hosts per dc / cluster) through an api or even betterfrom the hosts itself. When testing I connect to the storage pools using the apiDo you mean vdsm api? You can get the host id using vdsClient:# vdsClient -s 0 getStoragePoolInfo fe307b9e-8f6b-4958-955a-0faeeae8b017name = No Description isoprefix = pool_status = connected lver = 7 spm_id = 1 master_uuid = eeb8e812-4e69-469a-a07a-272ea3a79105 version = 4 domains = 16fe0625-be29-4a77-81c5-1bc0e5267eea:Active,eeb8e812-4e69-469a-a07a-272ea3a79105:Active type = ISCSI master_ver = 3 16fe0625-be29-4a77-81c5-1bc0e5267eea = {'status': 'Active','diskfree': '97844723712', 'isoprefix': '', 'alerts': [], 'disktotal':'106568876032', 'version': 4} eeb8e812-4e69-469a-a07a-272ea3a79105 = {'status': 'Active','diskfree': '98918465536', 'isoprefix': '', 'alerts': [], 'disktotal':'106568876032', 'version': 4} If you have vdsm source, you can use the new client: # contrib/jsonrpc StoragePool getInfo storagepoolID=fe307b9e-8f6b-4958-955a-0faeeae8b017 { "info": { "name": "No Description", "isoprefix": "", "pool_status": "connected", "lver": 7, "spm_id": 1, "master_uuid": "eeb8e812-4e69-469a-a07a-272ea3a79105", "version": "4", "domains": "16fe0625-be29-4a77-81c5-1bc0e5267eea:Active,eeb8e812-4e69-469a-a07a-272ea3a79105:Active", "type": "ISCSI", "master_ver": 3 }, "dominfo": { "16fe0625-be29-4a77-81c5-1bc0e5267eea": { "status": "Active", "diskfree": "97844723712", "isoprefix": "", "alerts": [], "disktotal": "106568876032", "version": 4 }, "eeb8e812-4e69-469a-a07a-272ea3a79105": { "status": "Active", "diskfree": "98918465536", "isoprefix": "", "alerts": [], "disktotal": "106568876032", "version": 4 } } }and its importantthe hostid used when making this api call is correct or bad thingshappen.I have been searching high and low to no avail. In understand theengine isin charge here but i really would be helped if this values can beobtained without going into the db.As i am continuously rebuilding dc's / storage pools and hosts i cannotkeeptrack of when which host is installed hence the need to know the spm_idas listed.It might be i am all wrong but the when i use the vds_spm_id as listedi can connect the host to the storage pools using the api.
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