resource_capacity.sh

# Display current K8S resource usage for a namespace (either first argument or current)
# Add to your ~/.profile, copy-paste results for analysis to https://docs.google.com/spreadsheets/d/1v___k9gYo4RI4wWIluJcdqOVHCFEccLQMOCGxvrZGtk/edit?usp=sharing
# [email protected] / 2023-07-18

function resource_capacity() {

  if [ -z "$1" ]
  then
    namespace=$(kubectl config view --minify -o jsonpath='{..namespace}')
  else
    namespace="$1"
  fi

  kubectl resource-capacity --util --pods -n $namespace | tr -s '[:blank:]' "\t" | sed -r 's/([[:digit:]]+)Mi\t/\1\t/g' | sed -r 's/([[:digit:]]+)m\t/\1\t/g' | sed -r 's/^(gke-k[[:digit:]]+)-gcp-/\1\t/g' | grep -v "*" | sed '/^\t$/d' | grep -v "POD\tCPU\tREQUESTS" | sed -r 's/\([[:digit:]]+%\)(\t|$)//g' | cut -f3-

}