I’m using internal shapshots (which is a feature of qcow2 disk files )to back up my virtual machines.
This feature is available only from rhel 6.0 release. The best thing about it that it gives us fast way to backup our machines, without powering the off- snapshot will freeze our guest machine and unfreeze it when it’s done. It is very useful before any major upgrades. We are making a snapshot, then upgrade and if there is any problem we can revert back virtual machine to the state when snapshot was made. Continue reading
Last week I had to recover one of my virtual machine images from snapshot. I’m using HP2000 storage with feature of snapshot schedule. My schedule is configured to keep 4 snapshots in storage, so i can revert my volume up to 4 days back.
I’m using very simple way to back up my virtual machines:
1. I create a snapshot of my lvm volume where I keep images
2. Mount the snapshot
3. I tar all my images and copy them to other server
4. Umount and remove the snapshot
I have created a backup script that is run everyday by cron:
Just got my resoults from ex200 and ex300 exams and…. I’m very proud to announce, that from now on I’m Red hat Certified Engineer 😀 😀
We will create a clustered storage GF2 and connect our 3 KVM hosts to it, so that we will be able to live migrate guests from one host to another. Ok let’s begin 🙂
First on every host Install prerequisites for KVM ( I choose Virtual Machine Host during installation, so my systems are already able to create guests):
Hello, here is part two of forwarding VLANs to KVM guest.
First part was t forward VLANs via trunk interface using bridges:
Now I will show you how to bond two interfaces using Dynamic Link Agregation and to make it all work with VLANs and bridges. It will give us better network performance and fault tolerant connection.
So let’s start 🙂 Here is drawing that shows how it all should work. I’m connecting serwer with SPS2024 Linksys switch:
I have managed to configure my storage HP 2000. I’m using three different disk types:
11 SAS disk 7200 rpm 1 TB size each
11 SAS disk 1500 rpm 600MB size each
11 SAS disk 1500 rpm 140MB size each
I want to use this storage for my virtual machines with KVM hypervisor
I have configured on Vdisk for each disk types. Each Vdisk group is RAID 5 with 1 hot spare and additionally I have one global spare just for safety.
Later I have created Volumes for my systems and configured Explicit mapping just for specific host.