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A team needs to set up a highly available Kubernetes control plane across three availability zones. What is the minimum number of etcd members required to achieve fault tolerance against one zone failure?
For a highly available Kubernetes control plane across three availability zones, the etcd cluster must tolerate the loss of one entire zone. With three etcd members, one per zone, the cluster requires a majority (2) to form quorum. If one zone fails, the remaining two members sti…Read full explanation
A security audit reveals that the kube-apiserver is using the default insecure port 8080 on a production cluster. Which is the most secure and recommended remediation?
Setting `--insecure-port=0` disables the unencrypted HTTP port (default 8080), which eliminates the risk of unauthenticated access to the API server. Ensuring `--secure-port=6443` is configured enforces TLS-encrypted communication on the standard secure port, which is the only re…Read full explanation
During a cluster upgrade, the kubelet on a worker node fails to start after updating the kubelet binary. The kubelet logs show: 'failed to load bootstrap client certificate: open /var/lib/kubelet/pki/kubelet-client-current.pem: no such file or directory'. What is the most likely cause?
The error 'failed to load bootstrap client certificate: open /var/lib/kubelet/pki/kubelet-client-current.pem: no such file or directory' indicates that the kubelet cannot find the bootstrap client certificate file. This file is generated from the bootstrap kubeconfig file during …Read full explanation
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