kubectl: get specific value from a secret in plaintext
Try this kubectl get secret foo –template={{.data.bar}} | base64 –decode No need of jq.
kubectl
Service account secret is not listed. How to fix it?
In Kubernetes 1.24, ServiceAccount token secrets are no longer automatically generated. See “Urgent Upgrade Notes” in the 1.24 changelog file: The LegacyServiceAccountTokenNoAutoGeneration feature gate is beta, and enabled by default. When enabled, Secret API objects containing service account tokens are no longer auto-generated for every ServiceAccount. Use the TokenRequest API to acquire service account tokens, … Read more
Checking Kubernetes pod CPU and memory utilization
CHECK WITHOUT METRICS SERVER or ANY THIRD PARTY TOOL If you want to check pods cpu/memory usage without installing any third party tool then you can get memory and cpu usage of pod from cgroup. Go to pod’s exec mode kubectl exec -it pod_name -n namespace — /bin/bash Run cat /sys/fs/cgroup/cpu/cpuacct.usage for cpu usage Run … Read more
Downgrade kubectl version to match minikube k8s version
You can just download the previous version binary and replace the one you have now. Linux: curl -LO https://storage.googleapis.com/kubernetes-release/release/v1.5.2/bin/linux/amd64/kubectl chmod +x ./kubectl sudo mv ./kubectl /usr/local/bin/kubectl macOS: curl -LO https://storage.googleapis.com/kubernetes-release/release/v1.5.2/bin/darwin/amd64/kubectl chmod +x ./kubectl sudo mv ./kubectl /usr/local/bin/kubectl Windows: curl -LO https://storage.googleapis.com/kubernetes-release/release/v1.5.2/bin/windows/amd64/kubectl.exe And add it to PATH. If not follow instructions for other Operating Systems here: … Read more
Script to continuously follow kubectl get pods
You can just use kubectl get pod <your pod name> -w whenever any update/change/delete happen to the pod, you will see the update. You can also use watch -n 1 kubectl get pod <your pod name> This will continuously run kubectl get pod … with 1 seconds interval. So, you will see latest state.