I recently created a new Centos VM. When it booted, I noticed it did not have a working ethernet connection. So, I started playing with things, and got it working. Here are my notes:
Enabling an Ethernet connection on Centos7
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Category Archives: Networking
Reproducing an Open vSwitch Bridge Configuration
In the previous post, I described the setup for installing FreeIPA on a VM parallel to the undercloud VM setup by Tripleo Quickstart. The network on the undercloud VM has been setup up by Ironic and Neutron to listen on a network defined for the overcloud. I want to reproduce this on a second machine that is not enrolled in the undercloud. How can I reproduce the steps?
Continue readingA TFTP Server in Rust
Rust is Pedantic. I’m Pedantic. We get along wonderfully. Since HTTP is way too overdone, I wanted to try something at the Byte twiddling level. I got a very, very basic TFTP server to run and fetch a larger binary file without corrupting it. Time to celebrate with a bragpost.
Continue readingUsing Ansible to add a NetworkManager connection
The Virtual Machine has two interfaces, but only one is connected to a network. How can I connect the second one?
Creating a new Network for a dual NIC VM
I need a second network for testing a packstack deployment. Here is what I did to create it, and then to boot a new VM connected to both networks.
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OpenStack keeps resetting my hostname
No matter what I changed, something kept setting the hostname on my vm to federate.cloudlab.freeipa.org.novalocal. Even forcing the /etc/hostname file to be uneditable did not prevent this change. Hunting this down took far too long, and here is the result of my journey.
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Firewalld rule for Minecraft Server
My sons play Minecraft. I recently decided to let them play head to head on the same server. Aside from the financial aspect (I had to buy a second account) it was fairly straightforward running the server. The one thing that tripped me up was a firewall rule that prevented a remote client machine from connecting to the server. Fix was pretty simple.
Who holds the keys to the Kingdom
During the years I worked as a Web application developer, it seemed like every application had its own authentication mechanism. An application developer is thinking in terms of the domain model for their application whether it be eCommerce, Systems management, photography, or weblogs. Identity Management is a cross cutting concern, and it is hard to get right. Why, then, do so many applications have “user” tables in their databases?
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Troubleshooting a FreeIPA install:
I had a handful of machines enrolled in a demo cluster. About half of them got shut down, and now I can’t SSH into them via Kerberos tickets. Here is my debugging notebook.
firewall-d for FreeIPA
First hack at a script to open the ports needed by FreeIPA. On Fedora 18, running Firewall D, I ran the below script. Comments and corrections welcome.