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A month or so ago I jotted down some notes on using ansible to set up a kubernetes cluster on atomic hosts with kubernetes running in regular docker containers and flannel and etcd running in system containers. I’ve been working on turning my kube containers into system containers. Three reasons jump to mind: I want […]
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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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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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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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