In this video, we're looking at the Machine Config Operator for OpenShift. We will specifically be looking at release 4.14 of OKD. Most of the code we look at in this video comes from:
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We look at how it renders machine-configs into an ignition file that provides a declarative state for the system, and the consequences of manually changing those files outside of the ignition process.
Ignition:
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We looked at Rebootless updates:
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Finally we take a look at some troubleshooting that I did to overcome a update issue related to machine config operator and discuss rpm-ostree.
Here's an example of the Fedora CoreOS RPM OCI container file:
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