RHEV

Solved: internal error boot orders have to be contiguous and starting from 1

Submitted by John on Wed, 2013-01-30 19:16

I exported a VM from RHEV 3.0 to an export domain. Then I imported the VM into RHEV 3.1.

I was surprised that the VM would not start. Instead, I got this message:

Exit message: internal error boot orders have to be contiguous and starting from 1

Upon further inspection, the boot order information was completely missing from the imported KVM definition:

Topic: 
RHEV
KVM

Solution to Permission denied to /etc/mtab

Submitted by John on Thu, 2012-07-12 10:58

I was setting up a hypervisor for RHEV running a full RHEL6 install instead of RHEV-H, and I wanted to tune it for better hypervisorness.

So I thought, Hey! I'll install tuned, since I am all excited about tuned after viewing the slides from Mark Wagner's Achieving Top Network Performance (PDF) at the 2012 Red Hat Summit. I was particularly excited about slide 12 entitled "Teaser 3 - latency."

Topic: 
RHEL6
tuned
RHEV

Using RHEL6 to share RAID volume via iSCSI: the Mystery of the Missing LUN

Submitted by John on Mon, 2012-04-16 15:23

My use case was pretty simple. I wanted to share out a raw device via iSCSI to a nearby host on the 172.16.2.x network.

In addition to a minimal Red Hat Enterprise Linux 6 (or equivalent) install, a few packages are needed:

# yum install -y iscsi-initiator-utils scsi-target-utils sg3_utils lsof

I knew the device I wanted to share was /dev/sdb by looking at the output from dmesg:

Topic: 
RHEL6
RHEV
iSCSI

RHEV 3.0 Firewall Annotated iptables Configuration for Netfilter

Submitted by John on Fri, 2012-03-02 10:40

When Red Hat Enterprise Virtualization Manager for Servers is installed, it offers to configure iptables for you:

...
Firewall ports need to be opened.
You can let the installer configure iptables automatically overriding the current configuration. The old configuration will be backed up.
Alternately you can configure the firewall later using an example iptables file found under /usr/share/rhevm/conf/iptables.example
...

Here's an annotated version of what the RHEVM installer will give you:

Topic: 
RHEL6
RHEV
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