- Certified Kubernetes Administrator (CKA) - A Cloud Guru
- Certified Kubernetes Administrator (CKA) with Practice Tests - Udemy
- Do 2–3 times the following CKAD-exercises
- Do the CKAD series with scenarios on Medium
- Do the CKA series with scenarios
- Do the chadmcrowell/CKA-Exercises
- Do the moabukar/CKA-Exercises
- Do the alijahnas/CKA-practice-exercises
- Do the Certified Kubernetes Administrator (CKA) Crash Course
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Set the following before starting the examn:
alias k=kubectl # will already be pre-configured export do="--dry-run=client -o yaml" # k get pod x $do export now="--force --grace-period 0" # k delete pod x $now
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Create the file ~/.vimrc with the following content:
set tabstop=2 set expandtab set shiftwidth=2
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Open 2 tabs with the following:
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When you have to fix a component (like kubelet) in one cluster, just check how its setup on another node in the same or even another cluster. You can copy config files over etc.
:set numberfollowed by Enter to toggle line numbers:set pasteto paste fromatedyaml- Copy&paste
- Mark lines:
Esc+V(then arrow keys) - Copy marked lines:
y - Cut marked lines:
d - Past lines:
porP
- Mark lines:
- Get pod base
yaml:k -n namespace run p2-pod --image=nginx:1.21.3-alpine $do > p2-pod.yaml - Get pod labels:
k -n namespace get pod -L app - Create service pod:
k -n namespace expose pod p2-pod --name p2-service --port 3000 --target-port 80 - Filter by labels:
k get svc,ep -l app=check-ip
/etc/systemd/system/kubelet.service.d/10-kubeadm.conf: Kubelete config file/etc/kubernetes/pki: Certificatescat /etc/kubernetes/manifests/kube-apiserver.yaml | grep etcd: Checketcdconfig- Change
CIDR->/etc/kubernetes/manifests/kube-apiserver.yamland/etc/kubernetes/manifests/kube-controller-manager.yaml(at--service-cluster-ip-range)
Schedule pods in Control Plane nodes (tolerations)
spec:
tolerations:
- effect: NoSchedule
key: node-role.kubernetes.io/master -
crictl ps | grep kube-proxy -
iptables-save | grep p2-service