Creating and Deleting OpenStack Pacemaker IP Addresses


You can use the steps below if you need to change managed IP resources, for example, if you need to re-IP your RHEL OSP Overcloud endpoints.

In this example, we are changing a managed VIP from one IP to another.

First, we get a good look at the resource that we want to delete. Here we are going to delete the resource ip- This resource starts the VIP,

# pcs resource show ip-
Resource: ip- (class=ocf provider=heartbeat type=IPaddr2)
Attributes: ip= cidr_netmask=32
Operations: start interval=0s timeout=20s (ip-
stop interval=0s timeout=20s (ip-
monitor interval=10s timeout=20s (ip-

Now let’s actually delete it.

# pcs resource delete ip-
Attempting to stop: ip-…Stopped

Now lets create the replacement VIP

# pcs resource create ip- ocf:heartbeat:IPaddr2 ip= cidr_netmask=32 op monitor interval=10s

Now, let’s take a good look at it.

# pcs resource show ip-
Resource: ip- (class=ocf provider=heartbeat type=IPaddr2)
Attributes: ip= cidr_netmask=32
Operations: start interval=0s timeout=20s (ip-
stop interval=0s timeout=20s (ip-
monitor interval=10s (ip-

Now we need to check to make sure that the VIP started on one of our OpenStack controllers.

# pcs status | grep
ip- (ocf::heartbeat:IPaddr2): Started ctrl01

For good measure, let’s make sure we can ping it.

# ping
PING ( 56(84) bytes of data.
64 bytes from icmp_seq=1 ttl=64 time=0.781 ms
64 bytes from icmp_seq=2 ttl=64 time=1.21 ms



Your Cloud Installed Before Lunch with QuickStart Cloud Installer 1.0

What if I told you that you can have your Red Hat Enterprise Linux (RHEL) based Cloud infrastructure, with Red Hat Virtualization, OpenStack, OpenShift and CloudForms all setup before you have to s…

Source: Your Cloud Installed Before Lunch with QuickStart Cloud Installer 1.0

Component, Plug-In, and Driver Support in RHEL OpenStack Platform




This article details all supported drivers and plugins for each RHEL OSP component (Cinder, Glance, Neutron, etc). Last updated 7/11/16.

Link Below:

OpenShift Enterprise 3.1 Lab Setup

Overview OpenShift Enterprise is a PaaS platform that enables digital transformation. It lets you build and run traditional (mode 1) as well as cloud-native (mode 2) applications. OpenShift is buil…

Source: OpenShift Enterprise 3.1 Lab Setup

Driving in the Fast Lane – CPU Pinning and NUMA Topology Awareness in OpenStack Compute

Now that we have set up the guest virtual machine instances so that they will only be allowed to run on cores 2, 3, 6, and, 7 we must also set up the host processes so that they will not run on these cores – restricting themselves instead to cores 0, 1, 4, and 5. To do this we must set the isolcpus kernel argument – adding this requires editing the system’s boot configuration.

Source: Driving in the Fast Lane – CPU Pinning and NUMA Topology Awareness in OpenStack Compute

RHEV/oVirt – 503 Service Temporarily Unavailable


This post will walk you through fixing the RHEV/oVirt error shown below. Note that this error was received when trying to load the RHEV-M/oVirt Engine web interface.


Note that these instructions worked for me in a known working environment, where the web interface was previously working but had failed after an unscheduled restart of the host.

First lets restart the ovirt-engine.

# service ovirt-engine restart
Stopping oVirt Engine: [FAILED]
Starting oVirt Engine: [ OK ]

Next we restart the ovirt-websocket-proxy

# service ovirt-websocket-proxy restart
Stopping oVirt Engine websockets proxy: [ OK ]
Starting oVirt Engine websockets proxy: [ OK ]

Finally, we restart Apache.

# service httpd restart
Stopping httpd: [ OK ]
Starting httpd: [ OK ]

Zelda Outlands Walkthough


The “Legend of Zelda – Outlands” is a hack of the original 8-bit “Legend of Zelda” game for the NES.  The ROM can be downloaded here. The game is also available in cartridge format on Ebay and the like, however the price is prohibitive.

Note that this re-work of the original LOZ game is notoriously difficult. I was, however, able to dig up walkthrough in word doc format. I am posting it below for posterity, and am adding some formatting to make it easy to read.


The Thunderbird, a horrible guardian encountered by Link in the Great Palace of Zelda 2, has somehow survived and is out for revenge. Having lost the Triforce of Courage at the hands of its adversary, it has stolen the Triforce of Power and flown to the vast neighbor of Hyrule, the Outlands.

In a world similar to yet completely different from Zelda 1, Link must track down the captured Tetrarch Fairies and, with their help, break open Ganon’s secret golden vault where the creature now resides. Link will face dangers and traps unlike anything Ganon had ever devised. His adventure will span 18 new dungeons hidden within a completely unfamiliar terrain.

Zelda herself will make appearances to help the hero, providing items and sage advice crucial to the new journey. Link has become very skilled in his familiar world of Hyrule, but skill alone is his only advantage — the land of the Outlands is a beautiful yet deadly world bearing no resemblance to his own cherished kingdom.


Map Of Overworld – Click for Full Size




Your start location is on the west end of the map, (at A6) and you don’t have any weapon with you. From here, go right three screens, down once, and right once. you will arrive at screen E7 and enter Level 1 here.



Level 1 : Amicus Palace

Item to get : Sword
Heart Container : #1
Tetrach Fairy:1

As soon as you enter, go right 2 screens and you will get your sword from Zelda. Head back left and kill the easy blue Peahats for 5 rupees and go up. Here, Kill all Gibdos to get the key and unlock the door there. Go up, right, up, and right 4 screens. Kill all the Peahats and then push the far left block to open the doors.

Go right again and kill the Peahats, then grab the key and head up to next room. Here, you will get a compass from Zelda. from here, Go down 2 screens and you’ll face Boomerang Moblins that will attack you with boomerang, and they are deadly. Kill them for the map. From here, go up, left, left, down, and left 5 screens.

Here, go left and up 2 screens. Kill all the Deelers here and head up again. Destroy the Cages and note the one difference in details in this room. There’s a block on the right side where a gap is on the left. Push this block down and go right once. Kill the Moblins for another key and go right again. Note the Wizzrobe Quartet in here, focused on a ball in their center. This will be important later.

Make your way back to the room that had the Deelers and go left by unlocking the door. Kill or just avoid the Blue Moblins and go left. Ready for tough battle, Basilisk triplets!

To defeat them, feed them with a bomb and quickly place a second to kill it. You can slash it after stun it with bomb to get four extra bombs. Once you’re done head down and kill the Peahats, then push one of the block to get the Heart Container #1.

Then, go up 2 screens and grab the Tetrach Fairy #1. Before leaving this dungeon, check your map and you’ll notice a few rooms that you haven’t explored yet. We’ll be come back here later… So leave this dungeon.

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