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test containerized kube and system container-based flannel and etcd
This will fail (if you use hostnames) at: TASK [flannel : Load the flannel config file into etcd] because we need this PR in the Fedora etcd system container. You can work around by sshing into your master, and editing the resolv.conf inside of your etcd system container to match the host, exiting, and re-running…
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Paying for the News
I’ve been paying extra attention to the news these days, because of the election, so I’ve been having lots of interactions with the Washington Post’s “You Have X Free Articles Left This Month” subscription nag screens, and the similar ones from the New York Times. Sometimes, I ridiculously pause before clicking on a link, wondering…
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WordPress is not delighting me
I’ve switched blog engines from WordPress to Middleman (a static website engine) and back to WordPress, with various other static engine experiments in between. I switched back to WordPress, on a premium subscription, because WordPress started supporting markdown, which I like, and because WordPress is open source software (with open source comments support), which I…
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Installing Kubernetes on CentOS Atomic Host with kubeadm
Version 1.4 of Kubernetes, the open-source system for automating deployment, scaling, and management of containerized applications, included an awesome new tool for bootstrapping clusters: kubeadm. Using kubeadm is as simple as installing the tool on a set of servers, running kubeadm init to initialize a master for the cluster, and running kubeadm join on some…
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upstream hyperkube, rpm edition
I’ve written recently about running kubernetes in containers on an atomic host. There are a few different ways to do it, but the simplest method involves fetching and running the Debian-based container provided by the upstream kubernetes project. Debian is awesome, but I’m team RPM — when I run containerized apps, I tend to base…
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Running Kubernetes and Friends in Containers on CentOS Atomic Host
The devel tree of CentOS Atomic Host, which features a trimmed-down system image that leaves out kubernetes and related system components, is a great place to experiment with alternative methods of running these components, and swapping between them. http://www.projectatomic.io/blog/2016/09/running-kubernetes-in-containers-on-atomic/
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New CentOS Atomic Host with Package Layering Support
Last week, the CentOS Atomic SIG released an updated version of CentOS Atomic Host (tree version 7.20160818), featuring support for rpm-ostree package layering. CentOS Atomic Host is available as a VirtualBox or libvirt-formatted Vagrant box, or as an installable ISO, qcow2 or Amazon Machine image. Check out the CentOS wiki for download links and installation…
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Up and Running with oVirt 4 and Gluster Storage
In June, the oVirt Project shipped version 4.0 of its open source virtualization management system. With a new release comes an update to this howto for running oVirt together with Gluster storage using a trio of servers to provide for the system’s virtualization and storage needs, in a configuration that allows you to take one…
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running kubernetes in containers on atomic
The atomic hosts from CentOS and Fedora earn their “atomic” namesake by providing for atomic, image-based system updates via rpm-ostree, and atomic, image-based application updates via docker containers. This “system” vs “application” division isn’t set in stone, however. There’s room for system components to move across from the somewhat rigid world of ostree commits to…
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