WEBVTT

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Hello, this is Mumshad Mannambeth,
and we are going through

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the Certified Kubernetes
Administrators course.

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In this lecture, we discuss about
cluster maintenance-related topics.

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We start by looking at
operating system upgrades.

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We see the implications of
losing a node from the cluster

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or when you take a node
out of the cluster on purpose,

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like for applying patches or upgrades
on the OS itself.

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We then look at
the cluster upgrade process,

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but before we do that,

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we need to know a little bit about
Kubernetes releases and versions,

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and the best practices
around upgrading

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when to upgrade,
what version to upgrade to, et cetera.

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We look at that first.

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Once you learn the upgrade procedure,

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you're asked
to upgrade a cluster by yourself.

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You will perform an end-to-end upgrade
of a cluster yourself

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with live applications
running on them.

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Finally, we'll look at some of
the backup and restore methodologies.

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You will practice
a disaster recovery scenario

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where you take a backup
of the Kubernetes cluster,

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then go through a simulated disaster.

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Then you're asked to recover
from that disaster

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and bring the cluster back
to the previous state.

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Well, fun stuff coming up.
Let's get started.