Kubernetes

kubernetes.md

Code

kubectl get pods -o=jsonpath='{.items..resources.limits}' -A

output

{"cpu":"200m","memory":"1Gi"} {"cpu":"200m","memory":"1Gi"} {"cpu":"200m","memory":"512Mi"} {"cpu":"500m","memory":"250Mi"} {"memory":"170Mi"} {"memory":"170Mi"} {"cpu":"2","memory":"2Gi"} {"cpu":"2","memory":"2Gi"} {"cpu":"2","memory":"2Gi"} {"cpu":"1","memory":"1Gi"} {"cpu":"1","memory":"1Gi"} {"cpu":"2","memory":"2Gi"} {"cpu":"100m","memory":"128Mi"} {"cpu":"100m","memory":"128Mi"} {"cpu":"500m","memory":"600Mi"} {"cpu":"1","memory":"1Gi"} {"cpu":"100m","memory":"25Mi"} {"cpu":"100m","memory":"25Mi"}

Use plugin

kubectl resource-capacity --sort cpu.limit --util --pods

Bash script

res=$(kubectl get pods -o=jsonpath='{.items[*]..resources.limits.cpu}' -A)
let tot=0
for i in $res
do
   if [[ $i =~ "m" ]]; then
      i=$(echo $i | sed 's/[^0-9]*//g')
      tot=$(( tot + i ))
   else
      tot=$(( tot + i*1000 ))
   fi
done
echo $tot

Sum the resources

kubectl get pod --all-namespaces --sort-by='.metadata.name' -o json | \
jq -r '[.items[] | {pod_name: .metadata.name, containers: .spec.containers[] | \
[ {container_name: .name, memory_requested: .resources.requests.memory, cpu_requested: .resources.requests.cpu} ] }]' | \
jq  'sort_by(.containers[0].cpu_requested)'

References:

• https://stackoverflow.com/questions/66007364/how-can-i-summarize-all-the-resource-limits-and-requests-in-kubernetes-with-kube
• https://gist.github.com/lucasrenan/c686e204ed7fb8e52825de34bc437771