Sum up CPU/Memory Limits/Requests for a given k8s namespace

getres_limreq.sh

js=$(kubectl get pods -n agents -o json) && \
cpur=$(echo $js | jq '.items[].spec.containers[]?.resources.requests.cpu' | sed -r 's/([0-9]*)m/\1/' | sed -e 's/"//g' -e 's/,//g' | paste -sd+ - | bc) && \
cpul=$(echo $js | jq '.items[].spec.containers[]?.resources.limits.cpu' | sed -r 's/([0-9]*)m/\1/' | sed -e 's/"//g' -e 's/,//g' | paste -sd+ - | bc) && \
memr=$(echo $js | jq '.items[].spec.containers[]?.resources.requests.memory' | sed -r 's/([0-9]*)Mi/\1/' | sed -e 's/"//g' -e 's/,//g' | paste -sd+ - | bc) && \
meml=$(echo $js | jq '.items[].spec.containers[]?.resources.limits.memory' | sed -r 's/([0-9]*)Mi/\1/' | sed -e 's/"//g' -e 's/,//g' | paste -sd+ - | bc) && \
echo -en "CPU Requests=${cpur}m, CPU Limits=${cpul}m\nMem Requests=${memr}Mi, Mem Limits=${meml}Mi\n"

Sample Output:

CPU Requests=280m, CPU Limits=680m
Mem Requests=300Mi, Mem Limits=1000Mi