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Resize iSCSI lun f storage domain
by Gianluca Cecchi 12 Apr '17

12 Apr '17

Hello, my iSCSI storage domain in 4.1.1 is composed by 1 lun of size 1TB and there are two hosts accessing it. I have to extend this LUN to 4Tb. What is supposed to be done after having completed the resize operation at storage array level? I read here the workflow: http://www.ovirt.org/develop/release-management/features/storage/lun-resize/ Does this imply that I have to do nothing at host side? Normally inside a physical server connecting to iSCSI volumes I run the command "iscsiadm .... --rescan" and this one below is all my workflow (on CentOS 5.9, quite similar in CentOS 6.x, except the multipath refresh). Is it oVirt itself that takes in charge the iscsiadm --rescan command? BTW: the "edit domain" screenshot should become a "manage domain" screenshot now Thanks, Gianluca I want to extend my filesystem from 250Gb to 600Gb - current layout of FS, PV, multipath device [g.cecchi@dbatest ~]$ df -h Filesystem Size Used Avail Use% Mounted on ... /dev/mapper/VG_ORASAVE-LV_ORASAVE 247G 66G 178G 28% /orasave [root@dbatest ~]# pvs /dev/mpath/mpsave PV VG Fmt Attr PSize PFree /dev/mpath/mpsave VG_ORASAVE lvm2 a-- 250.00G 0 [root@dbatest ~]# multipath -l mpsave mpsave (36090a0585094695aed0f95af0601f066) dm-4 EQLOGIC,100E-00 [size=250G][features=1 queue_if_no_path][hwhandler=0][rw] \_ round-robin 0 [prio=0][active] \_ 12:0:0:0 sdc 8:32 [active][undef] \_ 11:0:0:0 sdd 8:48 [active][undef] - current configured iSCSI ifaces (ieth0 using eth0 and ieth1 using eth1) [root@dbatest ~]# iscsiadm -m node -P 1 ... Target: iqn.2001-05.com.equallogic:0-8a0906-5a6994505-66f00106af950fed-dbatest-save Portal: 10.10.100.20:3260,1 Iface Name: ieth0 Iface Name: ieth1 - rescan of iSCSI [root@dbatest ~]# for i in 0 1 > do > iscsiadm -m node --targetname=iqn.2001-05.com.equallogic:0-8a0906-5a6994505-66f00106af950fed-dbatest-save -I ieth$i --rescan > done Rescanning session [sid: 3, target: iqn.2001-05.com.equallogic:0-8a0906-5a6994505-66f00106af950fed-dbatest-save, portal: 10.10.100.20,3260] Rescanning session [sid: 4, target: iqn.2001-05.com.equallogic:0-8a0906-5a6994505-66f00106af950fed-dbatest-save, portal: 10.10.100.20,3260] In messages I get: Apr 24 16:07:17 dbatest kernel: SCSI device sdd: 1258291200 512-byte hdwr sectors (644245 MB) Apr 24 16:07:17 dbatest kernel: sdd: Write Protect is off Apr 24 16:07:17 dbatest kernel: SCSI device sdd: drive cache: write through Apr 24 16:07:17 dbatest kernel: sdd: detected capacity change from 268440698880 to 644245094400 Apr 24 16:07:17 dbatest kernel: SCSI device sdc: 1258291200 512-byte hdwr sectors (644245 MB) Apr 24 16:07:17 dbatest kernel: sdc: Write Protect is off Apr 24 16:07:17 dbatest kernel: SCSI device sdc: drive cache: write through Apr 24 16:07:17 dbatest kernel: sdc: detected capacity change from 268440698880 to 644245094400 - Dry run of multupath refresh [root@dbatest ~]# multipath -v2 -d : mpsave (36090a0585094695aed0f95af0601f066) EQLOGIC,100E-00 [size=600G][features=1 queue_if_no_path][hwhandler=0][n/a] \_ round-robin 0 [prio=1][undef] \_ 12:0:0:0 sdc 8:32 [active][ready] \_ 11:0:0:0 sdd 8:48 [active][ready] - execute the refresh of multipath [root@dbatest ~]# multipath -v2 : mpsave (36090a0585094695aed0f95af0601f066) EQLOGIC,100E-00 [size=600G][features=1 queue_if_no_path][hwhandler=0][n/a] \_ round-robin 0 [prio=1][undef] \_ 12:0:0:0 sdc 8:32 [active][ready] \_ 11:0:0:0 sdd 8:48 [active][ready] - verify new size: [root@dbatest ~]# multipath -l mpsave mpsave (36090a0585094695aed0f95af0601f066) dm-4 EQLOGIC,100E-00 [size=600G][features=1 queue_if_no_path][hwhandler=0][rw] \_ round-robin 0 [prio=0][active] \_ 12:0:0:0 sdc 8:32 [active][undef] \_ 11:0:0:0 sdd 8:48 [active][undef] - pvresize [root@dbatest ~]# pvresize /dev/mapper/mpsave Physical volume "/dev/mpath/mpsave" changed 1 physical volume(s) resized / 0 physical volume(s) not resized - verify the newly added 350Gb size in PV and in VG [root@dbatest ~]# pvs /dev/mpath/mpsave PV VG Fmt Attr PSize PFree /dev/mpath/mpsave VG_ORASAVE lvm2 a-- 600.00G 349.99G [root@dbatest ~]# vgs VG_ORASAVE VG #PV #LV #SN Attr VSize VFree VG_ORASAVE 1 1 0 wz--n- 600.00G 349.99G - lvextend of the existing LV [root@dbatest ~]# lvextend -l+100%FREE /dev/VG_ORASAVE/LV_ORASAVE Extending logical volume LV_ORASAVE to 600.00 GB Logical volume LV_ORASAVE successfully resized [root@dbatest ~]# lvs VG_ORASAVE/LV_ORASAVE LV VG Attr LSize Origin Snap% Move Log Copy% Convert LV_ORASAVE VG_ORASAVE -wi-ao 600.00G - resize FS [root@dbatest ~]# resize2fs /dev/VG_ORASAVE/LV_ORASAVE resize2fs 1.39 (29-May-2006) Filesystem at /dev/VG_ORASAVE/LV_ORASAVE is mounted on /orasave; on-line resizing required Performing an on-line resize of /dev/VG_ORASAVE/LV_ORASAVE to 157285376 (4k) blocks. The filesystem on /dev/VG_ORASAVE/LV_ORASAVE is now 157285376 blocks long. [root@dbatest ~]# df -h /orasave Filesystem Size Used Avail Use% Mounted on /dev/mapper/VG_ORASAVE-LV_ORASAVE 591G 66G 519G 12% /orasave

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ovirt node 4.1.1.1
by Julius Bekontaktis 11 Apr '17

11 Apr '17

Hey guys, Yesterday I've upgraded my Ovirt Node 4.1.0 to 4.1.1.1 version. Everything looks fine except Network configuration part is missing. If I enter manually in url (/network) like in the older version - I get Not Found error. I've roll backed to previous version - network configuration part is OK, reverted back to new one - no networking configuration. How should I configure networks? In terminal, the old way ? Thanks for any comments. Maybe I am missing something. Regards Julius

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EMC Unity 300
by Colin Coe 11 Apr '17

11 Apr '17

Hi all We are contemplating moving away from our current iSCSI SAN to Dell/EMC Unity 300. I've seen one thread where the 300F is problematic and no resolution is posted. Is anyone else using tis with RHEV/oVirt? Any war stories? Thanks CC

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Desktop virtualization and thin clients
by Giulio Casella 11 Apr '17

11 Apr '17

Hi, I'm evaluating some thin client to connect to ovirt VMs, used as desktop workstations. I really don't care about native client support, I distribute via PXE a custom linux OS launching remote viewer. I'd like to have good multimedia performance, at a reasonable price. Googling a little, I focused on a couple of vendor: https://www.igel.com and https://www.10zig.com/. Anyone has already tested those vendor products? which model? which is the (approx.) price? Obviously any hint on other vendors are welcome. The scenario is composed of about 1500 VMs, running on ovirt (RHV to say the truth), distributed over 3 datacenters, currently accessed using old (5-7 years) PC, that I'm planning to renew. TIA, Giulio

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Python-SDK4: How to list user permissions?
by nicolas＠devels.es 11 Apr '17

11 Apr '17

Hi, I'm trying to get a user's list of permissions, i.e., list all permissions a user have on VMs and VmPools. In SDK3 that was easy as I could run (being 'u' a User object): for perm in u.permissions.list(): vm = perm.get_vm() vmpool = perm.get_vmpool() if vm or vmpool: print "User has some permissions!" In SDK4 I cannot reproduce the same logic. u.permissions returns an empty list ([]). What I have so far is something like this: for u in users_serv.list(): if u.user_name == 'admin@internal': continue vms_service = sys_serv.vms_service() for vm in vms_service.list(): vms = vms_service.vm_service(id=vm.id) ps = vms.permissions_service() for perm in ps.list(): perm_service = ps.permission_service(id=perm.id) getperm = perm_service.get() if getperm.user.user_name == u.user_name: print "Permission for %s" % (u.user_name) if getperm.vm: print "VM: %s" % (getperm.vm.id) if getperm.vm_pool: print "VmPool: %s" % (getperm.vm_pool.id) However, this seems a bit overkill. We have nearly 850 VMs and for a single user this takes about 25 minutes to run. Additionally, it doesn't seem to return any permission, although I know this user has some permissions over 2 VMs (not sure where is it messed up). I also tried using the system_service.permissions_service() but it seems to return only the global permissions. Is there an easier way to do this? Thanks!

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More 4.1 Networking Questions
by Charles Tassell 11 Apr '17

11 Apr '17

Hi Everyone, Okay, I'm again having problems with getting basic networking setup with oVirt 4.1 Here is my situation. I have two servers I want to use to create an oVirt cluster, with two different networks. My "public" network is a 1G link on device em1 connected to my Internet feed, and my "storage" network is a 10G link connected on device p5p1 to my file server. Since I need to connect to my storage network in order to do the install, I selected p5p1 has the ovirtmgmt interface when installing the hosted engine. That worked fine, I got everything installed, so I used some ssh-proxy magic to connect to the web console and completed the install (setup a Storage domain and create a new network vmNet for VM networking and added em1 to it.) The problem was that when I added a second network device to the HostedEngine VM (so that I can connect to it from my public network) it would intermittently go down. I did some digging and found some IPV6 errors in the dmesg (IPv6: eth1: IPv6 duplicate address 2001:410:e000:902:21a:4aff:fe16:151 detected!) so I disabled IPv6 on both eth0 and eth1 in the HostedEngine and rebooted it. The problem is that when I restarted the VM, the eth1 device was missing. So, my question is: Can I add a second NIC to the HostedEngine VM and make it stick, or will it be deleted whenever the engine VM is restarted? Is there a better way to do what I'm trying to do, ie, should I setup ovirtmgmt on the public em1 interface, and then create the "storage" network after the fact for connecting to the datastores and such. Is that even possible, or required? I was thinking that it would be better for migrations and other management functions to happen on the faster 10G network, but if the HostedEngine doesn't need to be able to connect to the storage network maybe it's not worth the effort? Eventually I want to setup LACP on the storage network, but I had to wipe the servers and reinstall from scratch the last time I tried to set that up. I was thinking that it was because I setup the bonding before installing oVirt, so I didn't do that this time. Here are my /etc/sysconfig/network-scripts/ifcfg-* files in case I did something wrong there (I'm more familiar with Debian/Ubuntu network setup than CentOS) ifcfg-eth0: (ovirtmgmt aka storage) ---------------- BROADCAST=192.168.130.255 NETMASK=255.255.255.0 BOOTPROTO=static DEVICE=eth0 IPADDR=192.168.130.179 ONBOOT=yes DOMAIN=public.net ZONE=public IPV6INIT=no ifcfg-eth1: (vmNet aka Internet) ---------------- BROADCAST=192.168.1.255 NETMASK=255.255.255.0 BOOTPROTO=static DEVICE=eth1 IPADDR=192.168.1.179 GATEWAY=192.168.1.254 ONBOOT=yes DNS1=192.168.1.1 DNS2=192.168.1.2 DOMAIN=public.net ZONE=public IPV6INIT=no

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Upgrade hypervisor to 4.1.1.1
by eric stam 10 Apr '17

10 Apr '17

Yesterday I executed an upgrade on my hypervisor to version 4.1.1.1 After the upgrade, it is impossible to start a virtual machine on it. The messages I found: Failed to connect socket to '/var/run/libvirt/virtlogd-sock': Connection refused [root@vm-1 log]# hosted-engine --vm-status | grep -i engine Engine status : {"reason": "bad vm status", "health": "bad", "vm": "down", "detail": "down"} state=EngineUnexpectedlyDown The redhead version: CentOS Linux release 7.3.1611 (Core) Is this a known problem? Regards, Eric

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Installation of ovirtNode3.6 on VMware workstation is failing
by martin chamambo 10 Apr '17

10 Apr '17

Good day I am using ovirtEngine 4.0 and ovirtnode 4.0 .... on the same engine i also need to test ovirtNode 3.6 since its supported. Initially i struggled with installing ovirt engine 4.0 until i selected LVM thin provisioning the same trick is not working with ovirtNode3.6 ....any type of partition ,standard partition ,LVM ,LVM thin provisioning is not working is there anyone who experienced the same issue

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Error in starting vdsm in host
by shubham dubey 10 Apr '17

10 Apr '17

Hello, I am trying to install and configure vdsm in a newly created centos 7.3.The packages that I have installed is vdsm, vdsm-cli and libvirtd. Now when I am trying to start the vdsm service I am getting this error. [root@localhost ~]# systemctl start vdsmd Job for vdsmd.service failed because the control process exited with error code. See "systemctl status vdsmd.service" and "journalctl -xe" for details. [root@localhost ~]# journalctl -xe -- The result is failed. Apr 07 23:06:47 localhost.localdomain systemd[1]: Dependency failed for MOM instance configured for VDSM purposes. -- Subject: Unit mom-vdsm.service has failed -- Defined-By: systemd -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel -- -- Unit mom-vdsm.service has failed. -- -- The result is dependency. Apr 07 23:06:47 localhost.localdomain systemd[1]: Job mom-vdsm.service/start failed with result 'dependency'. Apr 07 23:06:47 localhost.localdomain systemd[1]: Unit vdsmd.service entered failed state. Apr 07 23:06:47 localhost.localdomain systemd[1]: vdsmd.service failed. Apr 07 23:06:47 localhost.localdomain systemd[1]: Cannot add dependency job for unit lvm2-lvmetad.socket, ignoring: Invalid re Apr 07 23:06:47 localhost.localdomain systemd[1]: vdsmd.service holdoff time over, scheduling restart. Apr 07 23:06:47 localhost.localdomain systemd[1]: Cannot add dependency job for unit lvm2-lvmetad.socket, ignoring: Unit is ma Apr 07 23:06:47 localhost.localdomain systemd[1]: start request repeated too quickly for vdsmd.service Apr 07 23:06:47 localhost.localdomain systemd[1]: Failed to start Virtual Desktop Server Manager. -- Subject: Unit vdsmd.service has failed -- Defined-By: systemd -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel -- -- Unit vdsmd.service has failed. -- -- The result is failed. Apr 07 23:06:47 localhost.localdomain systemd[1]: Dependency failed for MOM instance configured for VDSM purposes. -- Subject: Unit mom-vdsm.service has failed -- Defined-By: systemd -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel -- -- Unit mom-vdsm.service has failed. -- -- The result is dependency. Apr 07 23:06:47 localhost.localdomain systemd[1]: Job mom-vdsm.service/start failed with result 'dependency'. Apr 07 23:06:47 localhost.localdomain systemd[1]: Unit vdsmd.service entered failed state. Apr 07 23:06:47 localhost.localdomain systemd[1]: vdsmd.service failed. the momd service output is [root@localhost ~]# systemctl status momd ● momd.service - Memory Overcommitment Manager Daemon Loaded: loaded (/usr/lib/systemd/system/momd.service; static; vendor preset: disabled) Active: inactive (dead) since Fri 2017-04-07 23:15:32 IST; 3s ago Process: 13031 ExecStart=/usr/sbin/momd -c /etc/momd.conf -d --pid-file /var/run/momd.pid (code=exited, status=0/SUCCESS) Main PID: 13034 (code=exited, status=0/SUCCESS) Apr 07 23:15:32 localhost.localdomain systemd[1]: Starting Memory Overcommitment Manager Daemon... Apr 07 23:15:32 localhost.localdomain systemd[1]: PID file /var/run/momd.pid not readable (yet?) after start. Apr 07 23:15:32 localhost.localdomain systemd[1]: Started Memory Overcommitment Manager Daemon. Apr 07 23:15:32 localhost.localdomain python[13034]: No worthy mechs found the output for starting mom-vdsm service is [root@localhost ~]# systemctl restart mom-vdsm.service A dependency job for mom-vdsm.service failed. See 'journalctl -xe' for details. [root@localhost ~]# journalctl -xe -- The result is failed. Apr 07 23:18:40 localhost.localdomain systemd[1]: Dependency failed for MOM instance configured for VDSM purposes. -- Subject: Unit mom-vdsm.service has failed -- Defined-By: systemd -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel -- -- Unit mom-vdsm.service has failed. -- -- The result is dependency. Apr 07 23:18:40 localhost.localdomain systemd[1]: Job mom-vdsm.service/start failed with result 'dependency'. Apr 07 23:18:40 localhost.localdomain systemd[1]: Unit vdsmd.service entered failed state. Apr 07 23:18:40 localhost.localdomain systemd[1]: vdsmd.service failed. Apr 07 23:18:40 localhost.localdomain systemd[1]: Cannot add dependency job for unit lvm2-lvmetad.socket, ignoring: Invalid re Apr 07 23:18:40 localhost.localdomain systemd[1]: vdsmd.service holdoff time over, scheduling restart. Apr 07 23:18:40 localhost.localdomain systemd[1]: Cannot add dependency job for unit lvm2-lvmetad.socket, ignoring: Unit is ma Apr 07 23:18:40 localhost.localdomain systemd[1]: start request repeated too quickly for vdsmd.service Apr 07 23:18:40 localhost.localdomain systemd[1]: Failed to start Virtual Desktop Server Manager. -- Subject: Unit vdsmd.service has failed -- Defined-By: systemd -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel -- -- Unit vdsmd.service has failed. -- -- The result is failed. Apr 07 23:18:40 localhost.localdomain systemd[1]: Dependency failed for MOM instance configured for VDSM purposes. -- Subject: Unit mom-vdsm.service has failed -- Defined-By: systemd -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel -- -- Unit mom-vdsm.service has failed. -- -- The result is dependency. Apr 07 23:18:40 localhost.localdomain systemd[1]: Job mom-vdsm.service/start failed with result 'dependency'. Apr 07 23:18:40 localhost.localdomain systemd[1]: Unit vdsmd.service entered failed state. Apr 07 23:18:40 localhost.localdomain systemd[1]: vdsmd.service failed. Thanks, Shubham

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[Ovirt 4.0 Python SDK] Host fail to move in Maintenance State
by TranceWorldLogic . 10 Apr '17

10 Apr '17

Hi, I was trying to deactivate host via python SDK but found that host is not moving in Maintenance State. In this scenario, I found that I have one additional network added in cluster but not setup on Host. Hence it retrying in background for network sync. Because of this I suspect host is fail to move in maintenance state. Can someone help me how to force via python API to deactivate host ? Or Can I stop background sync of host ? Thanks, ~Rohit

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