Create and add quorum disk on cluster

Requirement: Two node cluster with multipathed iscsi storage.

Test 1: Cluster server

Test 22: Node1

Test 3:Node2

On test2, create a new 128MB partition in multipathed storage.

[root@test22 ~]# fdisk -cu /dev/mapper/1IET_00010001

On all nodes, run the below commands to update the partitions to kernel and multipath daemon knows about.

# partprobe ; multipath -r

On test2, create quorum disk on that new partition

[root@test22 ~]# mkqdisk -c /dev/mapper/1IET_00010001p3 -l qdisk

On test3, see the quorum disk.

[root@test3 ~]# mkqdisk -L
mkqdisk v3.0.12.1

/dev/block/253:3:
/dev/disk/by-id/dm-name-1IET_00010001p3:
/dev/disk/by-id/dm-uuid-part3-mpath-1IET_00010001:
/dev/dm-3:
/dev/mapper/1IET_00010001p3:
    Magic:                eb7a62c2
    Label:                qdisk
    Created:              Mon Apr  6 05:21:39 2015
    Host:                 test22.com
    Kernel Sector Size:   512
    Recorded Sector Size: 512


Then add this quorum disk to cluster[Luci].

Comments

Post a Comment

Popular posts from this blog

KVM & Qemu

QEMU is a powerful emulator, which means that it can emulate a variety of processor types. Xen uses QEMU for HVM guests, more specifically for the HVM guest's device model. The Xen-specific QEMU is called qemu-dm (short for QEMU device model) QEMU uses emulation; KVM uses processor extensions (intel-VT) for virtualization. Both Xen and KVM merge their various functionality to upstream QEMU, that way upstream QEMU can be used directly to accomplish Xen device model emulation, etc. Xen is unique in that it has paravirtualized guests that don't require hardware virtualization. Both Xen and KVM have paravirtualized device drivers that can run on top of the HVM guests. The QEMU hypervisor is very similar to the KVM hypervisor. Both are controlled through libvirt, both support the same feature set, and all virtual machine images that are compatible with KVM are also compatible with QEMU. The main difference is that QEMU does not support native virtualization. Consequently, QEMU has ...
Read more

PHP Fatal error: Class 'JFactory' not found

I have faced this issue in Joomla site and searched the forums but none of the forums including joomla did not give solution for me. They simply suggest to check joomla version, php version compatibility and php extensions. Finally I have fixed the issue. Issue:- ---------  [26-Sep-2014 18:11:29 Europe/Berlin] PHP Fatal error: Class 'JFactory' not found in /home/test/public_html/index.php on line 31 Cause & Solution:- ----------------------- In my case, it seems file which gives the class JFactory was missed. /home/test/public_html/libraries/joomla/factory.php --->Core file for Joomla. Simply restore that file under proper path to fix the issue.
Read more

docker.errors.APIError: 400 Client Error client is newer than server

You can face this issue when you are trying to use docker python library. Error: docker.errors.APIError: 400 Client Error: Bad Request for url: http+docker://localunixsocket/v1.26/images/json?only_ids=0&all=0 ("client is newer than server (client API version: 1.26, server API version: 1.24)") Solution: client= docker.from_env(version='auto') Use parameter "version" when instantiating a client.
Read more