2018-11-04 05:54
The following is the collectd config that I am running on my RHEL 7 kvm hypervisor. This is not meant to be an all inclusive config for collectd, rather I am looking to gather basic perform… Read More
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Enterprise Unix/Linux, Virtualization, Networking, Hardware Blog
2018-10-27 02:11
This is a fresh install of RHEL 7.5
First install the packages as shown below.
yum install qemu-kvm libvirt
Now install the additional recommened virtualization packages
# yum install vir… Read More
2018-10-26 05:31
This post will show you how to configure a trunk port with a native vlan. In this specific example I am configuring a range of ports, but the commands for an individual interface will be th… Read More
2018-10-26 05:04
Reset Port Config to Default for One Port
Use the command below to clear the configuration on a port.
s3560(config)#default interface gigabitEthernet 0/3
Interface GigabitEthernet0/3 set to… Read More
2018-10-18 17:04
via Red Hat OpenStack Platform 13: five things you need to know about networking Read More
2018-10-18 17:03
via Virtualize your OpenStack control plane with Red Hat Virtualization and Red Hat OpenStack Platform 13 Read More
2018-08-28 21:59
Qcow vs Raw, Performance Tweaks, Cloud-init, and a short guide on Kernel Tuning – courtesy of redhatstackblog.redhat.com
via 9 tips to properly configure your OpenStack Instance Read More
2018-08-28 17:56
First off let me start by saying that the new Cinder logo is wonderful. Nothing helps me think of backend storage better than the backend of a horse.
In an environment I am working in, we h… Read More
2018-08-20 21:26
The Hostname Problem
When deploying OpenStack via Red Hat OSP director you configure the hostname of your baremetal (ironic) nodes at time of import. This is done via json file, by default… Read More
2018-01-29 14:47
I am not into Minecraft, but my kids are.
I decided to local host a small Minecraft server on a RHEL 7 vm. There are tons of guides on how to install Minecraft on Linux, but I did not… Read More
2017-10-19 20:20
Tunables for Dell R630s for use when deploying OVS+DPDK
# OSP 10/11 DPDK Tunables
#
# R630 NUMA locality - CPUs
# node 0 cpus: 0 2 4 6 8 10 12 14 16 18 20 22
# 24 26 28 30 32 34 36 38 40… Read More
2017-10-19 05:38
So this one is pretty simple. However, I found a lot of misinformation along the way, so I figured that I would jot the proper (and most simple) process here.
Symptoms: a RHEL (or variant)… Read More
2017-10-10 16:27
How to deploy a simple OSP 10 POC/lab environment using Packstack (non-director deploy.
Source: OpenStack 10 (Newton) Lab Installation and Configuration Guide Read More
2017-08-25 22:06
TestPMD is a lightweight application running in user space, utilizing ovs-dpdk, that can be used for testing DPDK in packet forwarding mode.
In this example we want to setup TestPMD on a RH… Read More
2017-08-25 19:23
According to Wikipedia, “Link Layer Discovery Protocol (LLDP) is a vendor-neutral link layer protocol in the Internet Protocol Suite used by network devices for advertising their iden… Read More
2017-08-22 18:42
When you Nova boot an instance in an OSP Overcloud deployed using SR-IOV and CPU Pinning, that instance will be NUMA aligned, meaning that its vCPUs, memory, and SR-IOV VF (Virtual Function… Read More
2017-07-14 15:58
arger page sizes there is also an increased potential for memory to be wasted as processes must allocate memory in pages but not all of the memory on the page may actually be required.
Sourc… Read More
2017-05-31 14:35
Source: What’s new in Red Hat OpenStack Platform 11? Read More
2017-04-25 15:38
Source: Red Hat OpenStack Platform 10 is here! So what’s new? Read More
2017-03-07 05:16
I’ve never been a fan of using DHCP reservations to reserve an IP address for a device. However, there are a few situations where a static reservation is the best route to take.
Try y… Read More
2017-03-06 16:43
When attempting to login to your router’s webUI, you may have run into the error below.
cannot Login unless logout another user first.
This error is usually caused by improperly clos… Read More
2017-02-27 18:31
See instructions below on how to verify your configuration.yaml.
Ssh into your Home Assistant host. In my environment, I am running home assistant on a Raspberry Pi 2.
First I ssh as root… Read More
2017-02-21 23:46
You can run into this error when attempting to join a node into a Rabbitmq cluster when the cluster believes that a particular node is already a member of the cluster. I have run into this… Read More
2017-02-06 20:09
Here is a quick and dirty example of the format of your instackenv.json. This is the file that Ironic uses to import nodes.
Enter your IPMI user id under “pm_user”
Enter your IP… Read More
2017-01-17 04:49
Move the current database to a backup location for safe keeping.
# mv /var/lib/ironic-inspector/inspector.sqlite /root/
Restart Ironic services. Here we are hitting them all to be safe.
# f… Read More
2016-12-20 23:38
In this post, I am going to quickly document the process I used to grow a qcow2 disk image and increase the size of the underlying filesystem.
In this instance, I ran out of disk space on m… Read More
2016-12-07 20:31
#Introduction
This article will show you how to block your overcloud from being deleted.
#Blocking Users from Deleting the Overcloud Stack
First make a backup copy of /etc/heat/policy.json… Read More
2016-11-30 15:37
In this lab, we are going to deploy a functional, yet simple, Overcloud via the Tripleo WebUI using Virtual Machines. Our test deployment will consist of three Overcloud Controller Nodes (c… Read More
2016-11-08 20:13
Introduction
This article documents the configuration used to configure SR-IOV in OSP 8/Liberty on Dell hardware
Compute Node Configuration
This section will outline the changes needed to c… Read More
2016-10-04 15:18
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 f… Read More
2016-09-19 13:42
Background
In previous versions of RHEL OSP 7 the Control Plane/Provisioning network interface was assigned via DHCP and not managed via Heat. Starting in 7.2, this interface is now managed… Read More
2016-09-14 14:03
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 setu… Read More
2016-09-06 19:19
Plotnetcfg is a Linux utility that you can use to scan the networking configuration on a server and output the configuration hierarchy to a file. Plotnetcfg is most useful when trouble… Read More
2016-08-30 16:13
This article details all supported drivers and plugins for each RHEL OSP component (Cinder, Glance, Neutron, etc). Last updated 7/11/16.
Link Below:
https://access.redhat.com/articles/153… Read More
2016-07-26 14:30
Ran into issues with a deploy via RHEL OSP director, which caused our heat stack scale compute scale-out to fail.
We corrected the issue, and then attempted our deploy again. This time arou… Read More
2016-07-25 20:51
Out of the box you are not going to be able to run virsh commands on the cli as root. Libvirt, Virsh, and KVM are just not that tightly integrated in RHEV.
You can however, follow the proce… Read More
2016-07-13 18:36
Honestly, this one is not hard to figure out, as it’s documented in multiple places. However, I have found that the documentation varies greatly depending if you are using RHEV or Ov… Read More
2016-06-28 19:15
In this post, I am going to walk you through the process of installing and configuring two- factor SSH authentication via Google Authenticator. My base system is running a fresh… Read More
2016-06-10 19:22
Sandybridge I/O Controller to PCI-E Mapping
Using a few simple commands you can easily map a PCI slot back to its directly connected NUMA node. This information comes in very handy w… Read More
2016-05-16 19:00
Within OpenStack, each virtual machine instance running on a Compute nodes also a virtual machine running on a libvirt node.
If you ssh to a Compute node and run the command below you… Read More
2016-04-12 18:03
According to this page, a Technology Preview is a feature that is currently unsupported, may not have complete functionality, and are not suitable for deployment in p… Read More
2016-04-11 23:13
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… Read More
2016-03-24 19:11
Trying to determine that version of Red Hat OpenStack director that is installed on an Undercloud Controller is not as straight forward as one would hope.
I have created the… Read More
2016-03-21 20:25
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… Read More
2016-03-03 22:10
In this post we are going to walk through a process you can use to troubleshoot a failed heat stack deploy by viewing information of nested resources.
In the command below we are looki… Read More
2016-03-01 20:13
Introduction to Heat
Heat is the main orchestration engine for OpenStack, and is used my OpenStack director to install an OpenStack Overcloud environment.
When we run the “openstack de… Read More
2016-02-23 16:48
os-collect-config
os-collect-config is a tool that starts up via systemd when a system boots. It initially runs at boot time, but continues to run looking for changes in heat metadata. In a… Read More
2016-02-11 16:38
Note: The RT-AC66U and the RT-AC66R are identical other than their product number. The RT-AC66R is the product sold through Best Buy and RT-AC66U is the product sold directly from ASUS… Read More
2016-02-09 18:50
Open Vswitch is an Open Source software switch designed specifically to be used in virtualized environments such as OpenStack or RHEV-H. OVS (Open Vswitch) was designed to make i… Read More
2006-06-07 11:16
According to Wikipedia, Numa is — “a computer memory design used in multiprocessing, where the memory access time depends on the memory location relative to the processor. U… Read More
2006-06-07 11:16
This handy tool, developed by an engineer at Red Hat, checks your Ironic JSON file for errors such as missing passwords, or non-unique MAC addresses. The script also tests connections to you… Read More
2006-06-07 11:16
Previously, I wrote a short blog post on OpenStack director, the new Red Hat installer for Openstack 7 (kilo). That post can be found here, and includes a short video introduction and demo… Read More
2006-06-07 11:16
In this post I will walk though the steps that I used to setup software raid using mdadm on my RHEL 7.2 server. The disks in my server are shown below. /dev/sda – 64gb SSD – OS d… Read More
2006-06-07 11:16
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 Read More
2006-06-07 11:16
Hello again earthlings. The fatmin returns once again to dispense a bit of wisdom. This handy one-liner is a command that for the life of me I cannot remember. Our story begings when buildin… Read More
2006-06-07 11:16
Dunce Cap... seriously is that a real thing. Have you or someone you know ever have had to wear one? Or is this just something made up for tv and movies... anyway I digress.
Everything is… Read More
2006-06-07 11:16
SandwichWelcome to the way-back machine again. This time we are going to take a look at installing and configuring sudosh on Solaris with the purpose of using sudosh as a replacement for sud… Read More
2006-06-07 11:16
SFTP is a file transfer mechanism that is an extension of the SSH (Secure Shell) protocol and by design they share the same configuration file (/etc/ssh/sshd_config). By default when a user… Read More
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