OpenShift's oc debug and parallel execution

A colleague reported some issues in the OpenShift troubleshooting and diagnosis scripts at OpenShift-checks. Some time ago I did contribute some changes to use functions and allow using the RISU wrapper to the scripts, helping consuming the results via RISU’s HTML interface. As my colleague reported, for some plugins, the output of the command was not shown in the HTML Interface. After some investigation, it was found that parallel execution for the plugins was causing no output to be shown, but when filtering to individual ones via risu -i XXXXXXX/plugin -l it was working fine… the problem was not the check itself, as both of them worked fine when executed individually but failed when executing them together....

November 3, 2022 · 2 min · Pablo Iranzo Gómez

Setup a Quay mirror for offline installations with mirror-registry

In order to setup disconnected registry for installation, follow this blog post by Daniel at Introducing Mirror Registry for Red Hat OpenShift. At the end of the process it will output something like: INFO[2022-08-19 07:10:22] Quay installed successfully, permanent data is stored in /etc/quay-install INFO[2022-08-19 07:10:22] Quay is available at https://${HOSTNAME}:8443 with credentials (init, ${PASSWORDSTRING}) Once the setup is done, remember several steps: Edit /etc/containers/registries.conf to add relevant entries for our registry as required:...

August 19, 2022 · 2 min · Pablo Iranzo Gómez

Check Agent status per state

Check agent status per state watch -d "oc get agent -A -o jsonpath='{range .items[*]}{@.status.debugInfo.state}{\"\n\"}{end}' |sort | uniq --count"

August 10, 2022 · 1 min · Pablo Iranzo Gómez

Zero Touch Provisioning OpenShift for Edge computing

During the last months, I’ve been working with my colleagues on setting up a workflow that can be used to deploy Spoke clusters in an automated way. More or less, the idea behind this is that a cluster is configured via a set of configuration files and templates so that the required components are installed: Advanced Cluster Management (ACM) Quay registry OpenShift Data Foundation OpenShift Pipelines (a.k.a. Tekton) etc Once the system was configured, it would become a ‘Hub’, and from it, several ‘Spokes’ could be deployed using ACM, getting them configured in the process to become a cluster suitable for fully-disconnected operation....

March 12, 2022 · 2 min · Pablo Iranzo Gómez

Configuring OpenShift with self-contained NTP

Introduction In a regular OpenShift environment, NTP server is more less like this: Diagram In a self-contained cluster with no connection to external networks NTP server is not reachable, but a reachable NTP server is required for proper cluster synchronization. Cluster does use SSL certificates that require validation and might fail if the dates between the systems are not in sync or at least pretty close in time. Diagram We’ve several components already available in our OpenShift cluster that are very useful:...

December 7, 2020 · 5 min · Pablo Iranzo Gómez
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