search for: cluster_tutorial_2

...learned a lot, created some tools to simplify management and refined the design to handle corner-cases seen in the field. Today, the culmination of that learning is summed up in the "2nd Edition" of that tutorial, now called "AN!Cluster Tutorial 2". https://alteeve.ca/w/AN!Cluster_Tutorial_2 These HA KVM platforms have been in production for over two years now in facilities all over the world; Universities, municipal governments, corporate DCs, manufacturing facilities, etc. I've gotten wonderful feedback from users and all that real-world experience has been integrated into t...

...automatically migrating guests when one of the hosts goes down. > > My question is: Is this even possible? All the documentation for HA that I've found appears to not > do this. Am I missing something? Very possible. It's all I've done for years now. https://alteeve.ca/w/AN!Cluster_Tutorial_2 That's for EL 6, but the basic concepts port perfectly. In EL7, just change out cman + rgmanager for pacemaker. The commands change, but the concepts don't. Also, we use DRBD but you can conceptually swap that for "SAN" and the logic is the same (though I would argue that a SAN i...

CentOS-6.5 We have a KVM guest running MS-WinV7pro. This guest is joined to an Active Directory Domain. That domain provides DHCP to the members. The KVM guest does not obtain its IP from the domain but from the local host's qemu hypervisor instead. Is there anyway to get around this and have the guest MS-Win OS get its DHCP from the same place as the rest of the domain members? -- ***

CentOS-6.5 We have a KVM guest running MS-WinV7pro. This guest is joined to an Active Directory Domain. That domain provides DHCP to the members. The KVM guest does not obtain its IP from the domain but from the local host's qemu hypervisor instead. Is there anyway to get around this and have the guest MS-Win OS get its DHCP from the same place as the rest of the domain members? -- ***

...when one of the hosts goes down. >> >> My question is: Is this even possible? All the documentation for HA that I've found appears to not >> do this. Am I missing something? > > Very possible. It's all I've done for years now. > > https://alteeve.ca/w/AN!Cluster_Tutorial_2 > > That's for EL 6, but the basic concepts port perfectly. In EL7, just > change out cman + rgmanager for pacemaker. The commands change, but the > concepts don't. Also, we use DRBD but you can conceptually swap that for > "SAN" and the logic is the same (though I...

Hi, I have two KVM hosts (CentOS 7) and would like them to operate as High Availability servers, automatically migrating guests when one of the hosts goes down. My question is: Is this even possible? All the documentation for HA that I've found appears to not do this. Am I missing something? My configuration so fare includes: * SAN Storage Volumes for raw device mappings for guest vms

so I have a bunch of servers at work that are on DUAL UPS's (1 per each of 2 power supplies). Its mostly HP gear, but also some Sun and IBM. Ideally I'd like the system to not go into shutdown unless BOTH UPS's that a particular box is plugged into (there's actually 4 UPS, 2 per each of 2 racks). Has anyone ever configured anything like that with NUT or whatever? Right

I had so much trouble putting Centos 6 guest VMs on a Centos 5 host that I finally switched to a Centos 6 host. I've not needed more that test VMs, so I've used Virtual Machine Manager on the old system, which worked pretty well, so I decided to create my first KVM guest machine. I noticed when I created it, I only had the options of NAT for my network interface, so I used that

On 01/06/15 12:00 PM, Digimer wrote: > Hi all, > > I'm developing a program that is not a distro, per-se, but sort of > acts like one. Basically, it's a modified CentOS ISO with some extra > RPMs added, unneeded RPMs removed and containing a modified boot screen > and install selection list. > > The list says "CentOS", so a user knows the installed

On 09/17/2016 04:11 AM, Mauricio Tavares wrote: > On Sat, Sep 17, 2016 at 6:25 AM, Alice Wonder <alice at domblogger.net> wrote: >> Never used IPMI in my life and while I thought it was cool when I heard >> about it, had no plans to. >> > Under many different names (Sun called it LOM; I forgot IBM's > name), this has been out there for a while. And it

I just had an IBM in a remote location with a hardware raid1 have both drives go bad. With local machines I probably would have caught it from the drive light before the 2nd one died... What is the state of the art in linux software monitoring for this? Long ago when that box was set up I think the best I could have done was a Java GUI tool that IBM had for their servers - and that seemed like