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NFVPE Blog Posts

openshift-ansible – Bring your own inventory.

I’m working on getting an OpenShift cluster up and running, and in the while of trying to do it properly with openshift-ansible’s openstack method (which uses heat templates, as opposed to us building it all by hand here), I was trouble shooting an issue (my clocks were…. quite wrong, causing me much grief with creating proper certs for HTTPS necessary for etcd)… And I wound up going and doing the “create your own inventory” method.

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Creating a Custom Centos Cloud Image (for OpenStack)

So I’m working on getting openshift-ansible to spin up on top of OpenStack. And I’ve run into a few snags, one of which requires that I need to make a custom cloud image to run because the CentOS Generic Cloud image doesn’t have NetworkManager install/enabled, and… Even worse but maybe a story for another day is that it doesn’t support a Centos Atomic Host. Another approach would be to try to improve the Ansible script in openshift-ansible, however, this slices the Gordian Knot for now, and we’ll come back to that another time (as there’s plenty else to let ansible-openshift know about as you’ll find out in an upcoming article).

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OpenShift-on-OpenStack – Part 1 – “Easy Mode”

A shift-on-a-stack-on-stack, it’s turtles all the way down. It’s cool! We’re going to first use “TripleO Quick Start” aka oooq to get our openstack up. The gist here is that we’ll use a single baremetal host that we’ll call our “virtual machine host” which is going to have a VM to run the undercloud, and then in this simple example we’ll use the defaults so that there’s just one controller and one compute node.

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Generate Fedora Atomic images using diskimage-builder

About Atomic project – http://www.projectatomic.io Atomic is a lightweight operating system, assembled from RPM content. It is mainly designed to run applications in Docker containers. Hosts based on RHEL, Fedora and CentOS are available with Atomic.Project Atomic includes the following components: Docker, Kubernetes, rpm-ostree, systemd What are the advantages of Atomic? Using Atomic distributions limits the patch frequency for administrators. The usage of Docker containers offers a clear path to deliver consistent and fully tested stacks. Containers secured with Linux namespaces, cGroups, and SELinux give isolation close to that of a VM, with much greater flexibility and efficiency. About diskimage-builder…

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