The meta info was at the hearth of the NOMAD Archive, as a way to make the data available. The NOMAD meta info is an extensible language independent and format agnostic description of atomistic simulation data. Recently I rewrote the tools to manage the meta info in python 3, improved them and generally tried to take advantage of the lesson learned. pip install meta_into_tools python -m meta_info_tools.meta_tools --help See the meta info page for more details.

Bringing Back Kubernetes The problem Shortly after having had my last day of work some issues came up and the kubernetes cluster went down. I began looking into it (a bit half heartily) and I began noticing some strange random issues. Monitoring the kube-system namespace I saw that flannel issues seemed to crop up quickly. There are several issues open regarding flannel failing #963, 1076,… and initially the real culprit wasn’t clear.

Reinstalling the Kubernetes Production Cluster The main reason for this is a critical Kubernetes bug. Here is a bit a log of what I did (to hopefully help me next time). This is mostly taken from kubernetes doc (1, 2) and tweaks I added. Master node: Basically the same as the Visualization Setup minus the tainting and coredns editing: # disable swap: swapoff -a # comment out swap lines (the command should do it, but I prefer manual edit) # sudo sed -i '/ swap / s/^\(.

Dev Kubernetes reinstall The main reason for this is a critical Kubernetes bug. Here is a bit a log of what I did (to hopefully help me next time). Development cluster extension I installed a new cluster on labdev3, mostly following what I did last time. But labdev4 was having issues, so I asked a clean image. It took a bit to have it up. Here is the process to add it to the Kubernetes cluster.

Kubernetes Kubernetes is central to NOMAD archive and analytics (see /nomad/Kubernetes). Every installation of kubernetes has been quite different (kubernetes evolves quickly). Here is the description of the latest (more manual) installation I did on CentOS for the remote visualization, mainly as a reference for me. This uses kubeadm something that has simplified the installation of kubernetes. update kubeadm (from https://kubernetes.io/docs/setup/independent/install-kubeadm/) cat <<EOF > /etc/yum.repos.d/kubernetes.repo [kubernetes] name=Kubernetes baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64 enabled=1 gpgcheck=1 repo_gpgcheck=1 gpgkey=https://packages.