I have already done a POC. I'm going eventually to post inside the mailing list the gory details so that you could check and give feedback and then I go contribute in the wiki. Let me recollect the doc with the steps. Basic system was CentOS 6.5 with Pacemaker and cman. The filesystem resources (for postgres, etc..) were managed in drbd primary/secondary. At the end you would have somethng like this: [root@ovirteng01 ~]# crm_mon -1 Last updated: Thu Jun 12 12:21:13 2014 Last change: Fri Mar 14 15:30:57 2014 via cibadmin on ovirteng01.localdomain.local Stack: cman Current DC: ovirteng02.localdomain.local - partition with quorum Version: 1.1.10-14.el6_5.2-368c726 2 Nodes configured 13 Resources configured Online: [ ovirteng01.localdomain.local ovirteng02.localdomain.local ] Master/Slave Set: ms_OvirtData [OvirtData] Masters: [ ovirteng02.localdomain.local ] Slaves: [ ovirteng01.localdomain.local ] Resource Group: ovirt ip_OvirtData (ocf::heartbeat:IPaddr2): Started ovirteng02.localdomain.local lvm_ovirt (ocf::heartbeat:LVM): Started ovirteng02.localdomain.local fs_OvirtData (ocf::heartbeat:Filesystem): Started ovirteng02.localdomain.local pgsql_OvirtData (lsb:postgresql): Started ovirteng02.localdomain.local p_lsb_nfs (lsb:nfs): Started ovirteng02.localdomain.local p_exportfs_root (ocf::heartbeat:exportfs): Started ovirteng02.localdomain.local p_exportfs_iso (ocf::heartbeat:exportfs): Started ovirteng02.localdomain.local ovirt-engine (lsb:ovirt-engine): Started ovirteng02.localdomain.local ovirt-websocket-proxy (lsb:ovirt-websocket-proxy): Started ovirteng02.localdomain.local httpd (ocf::heartbeat:apache): Started ovirteng02.localdomain.local or with pcs commands: [root@ovirteng01 ~]# pcs resource show --groups ovirt: ip_OvirtData lvm_ovirt fs_OvirtData pgsql_OvirtData p_lsb_nfs p_exportfs_root p_exportfs_iso ovirt-engine ovirt-websocket-proxy httpd [root@ovirteng01 ~]# pcs resource show Master/Slave Set: ms_OvirtData [OvirtData] Masters: [ ovirteng02.localdomain.local ] Slaves: [ ovirteng01.localdomain.local ] Resource Group: ovirt ip_OvirtData (ocf::heartbeat:IPaddr2): Started lvm_ovirt (ocf::heartbeat:LVM): Started fs_OvirtData (ocf::heartbeat:Filesystem): Started pgsql_OvirtData (lsb:postgresql): Started p_lsb_nfs (lsb:nfs): Started p_exportfs_root (ocf::heartbeat:exportfs): Started p_exportfs_iso (ocf::heartbeat:exportfs): Started ovirt-engine (lsb:ovirt-engine): Started ovirt-websocket-proxy (lsb:ovirt-websocket-proxy): Started httpd (ocf::heartbeat:apache): Started the share file system is something like /dev/mapper/VG_OVIRT-LV_OVIRT 5.0G 203M 4.5G 5% /shared and has structure like [root@ovirteng02 ~]# ll /shared total 28 drwxr-xr-x. 6 root root 4096 Mar 1 14:11 etc drwx------. 2 root root 16384 Mar 1 10:29 lost+found drwxr-xr-x. 5 root root 4096 Mar 5 17:10 nfs_info drwxr-xr-x. 3 root root 4096 Mar 1 13:52 var [root@ovirteng02 ~]# ll /shared/etc/ total 16 drwxr-xr-x. 4 root root 4096 Mar 1 17:30 httpd drwxr-xr-x. 15 root root 4096 Mar 1 13:58 ovirt-engine drwxr-xr-x. 2 root root 4096 Mar 1 13:59 ovirt-engine-setup.conf.d drwxr-xr-x. 3 root root 4096 Mar 1 14:03 pki [root@ovirteng02 ~]# ll /shared/var/ total 4 drwxr-xr-x. 6 root root 4096 Mar 6 01:52 lib [root@ovirteng02 ~]# ll /shared/var/lib/ total 16 drwxr-xr-x. 3 root root 4096 Mar 5 18:58 exports drwxr-xr-x. 4 root root 4096 Mar 14 15:28 nfs drwxr-xr-x. 8 ovirt ovirt 4096 Mar 12 00:30 ovirt-engine drwx------. 4 postgres postgres 4096 Mar 1 12:49 pgsql more details in following e-mail. Let me know if it can be of interest. I tried some things like forced panic, relocation while webadmin open, etc... and it seemed consistent. Gianluca On Thu, Jun 12, 2014 at 11:52 AM, Itamar Heim <iheim@redhat.com> wrote:
On 06/12/2014 05:44 AM, KevinTang@umac.mo wrote:
Dear all,
If not using self hosted-engine solution, my Engine will install in dedicate machine. How should I make the engine become HA?
easiest would be to run it as a VM on a clustering solution like Red Hat Cluster Suite or similar.
Thanks
Best Regards, Kevin Tang ------------------------------------------------------------ -------------------------------------------------------- AMSV - STATE KEY LABORATORY OF ANALOG AND MIXED-SIGNAL VLSI University of Macau Tel: (+853) 8397-8035
From: Itamar Heim <iheim@redhat.com> To: KevinTang@umac.mo, users@ovirt.org Date: 06/12/2014 04:07 AM Subject: Re: [ovirt-users] Engine HA? ------------------------------------------------------------------------
On 06/11/2014 04:16 AM, KevinTang@umac.mo wrote:
Dear all,
I know oVirt Host (VM) can be HA and cluster, all VM can be migrate between all operational Node.
Since the main oVirt Engine is standalone, event shelf-hosted engine, it still is a single Engine.
I want to ensure my Engine can be HA, how should I do? Do I need to create a Cluster Linux first?
hosted-engine has built-in HA mechanism for the engine, so if the host its running on has an issue, another host will launch the hosted engine.
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