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Mauricio Teixeira 🇺🇸🇧🇷<p>Okay, I've been asked this question to which I was not prepared: where do you go if you want to learn Kubernetes from the ground up? Consider a person who doesn't even know how to run "docker" in their own laptop, but they want to rise to a point where they can actually manage a Kubernetes cluster. Thoughts?<br><a href="https://hachyderm.io/tags/HomeLab" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HomeLab</span></a> <a href="https://hachyderm.io/tags/Kubernetes" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Kubernetes</span></a> <a href="https://hachyderm.io/tags/SysAdminLife" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SysAdminLife</span></a> <a href="https://hachyderm.io/tags/k8s" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>k8s</span></a> <a href="https://hachyderm.io/tags/SRE" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SRE</span></a></p>
Ariel (🐿 arc)<p>CoreDNS + Kubernetes question:</p><p>CoreDNS, in its stock configuration, assumes/uses the default service created for the Kubernetes API.</p><p>However, this gets a ClusterIP from the cluster's Service IP range as part of normal IPAM.</p><p>This IP is not known to the operating system or during cluster setup, so isn't in the IP SANs for the TLS certificate. This causes CoreDNS to error out trusting the Kubernetes API when trying to watch services.</p><p>The the default Kubernetes service is roughly well-known as it's the bottom of the service IP range + 1 but that still feels... odd.</p><p>I looked into automatic in-cluster certificate management and rotation but that seems more about Kubelet client certificates for the API server, and none of the actual TLS certificates. Which kinda makes sense cause otherwise cyclic dependencies.</p><p><a href="https://kubernetes.io/docs/tasks/administer-cluster/dns-custom-nameservers/#coredns-configmap-options" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">kubernetes.io/docs/tasks/admin</span><span class="invisible">ister-cluster/dns-custom-nameservers/#coredns-configmap-options</span></a></p><p><a href="https://eigenmagic.net/tags/Kubernetes" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Kubernetes</span></a> <a href="https://eigenmagic.net/tags/k8s" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>k8s</span></a> <a href="https://eigenmagic.net/tags/CoreDNS" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CoreDNS</span></a></p>
The Late Night Linux Family<p>What the new Docker pull limits really mean and how to deal with them, and whether paying for 12 years of support for Kubernetes is a good idea.</p><p><a href="https://hybridcloudshow.com/hcs25/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">hybridcloudshow.com/hcs25/</span><span class="invisible"></span></a></p><p><a href="https://fosstodon.org/tags/podcast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>podcast</span></a> <a href="https://fosstodon.org/tags/cloud" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>cloud</span></a> <a href="https://fosstodon.org/tags/PlatformEngineering" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PlatformEngineering</span></a> <a href="https://fosstodon.org/tags/k8s" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>k8s</span></a></p>
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