replicaset-age.sh

replicaset-age.sh

#!/usr/bin/env bash

set -eou pipefail

DATE="date"
if command -v gdate &> /dev/null
then
    DATE="gdate"
fi

# which "$DATE"

deployments=$(kubectl get deployments --all-namespaces --no-headers -o=wide)

current_date=$($DATE -u +%s)

data=""

while IFS= read -r deployment; do
  ns=$(echo "$deployment" | awk '{ print $1 }')
  name=$(echo "$deployment" | awk '{ print $2 }')

  # printf "%-63s %-63s" "$ns" "$name"
  data+="$ns,$name"

  selectorLabels=$(kubectl get -n "$ns" deployment.apps/"$name" -o=json | jq -r '.spec.selector.matchLabels | to_entries | map("\(.key)%3D\(.value)") | join("%2C")')
  selectorLabels="${selectorLabels//\\/%2F}"

  # selectorLabelsJoined=$(join_by '%2C' "${selectorLabels[@]}")

  kube_date=$(kubectl get --raw "/apis/apps/v1/namespaces/${ns}/replicasets?labelSelector=${selectorLabels}&limit=500" | jq -r '.items[] | .metadata.creationTimestamp' | sort -r | head -1)
  data+=",${kube_date}"
  kube_date_bash=$($DATE -d"$kube_date" +%s)
  # echo "${kube_date_bash}"
  kube_date_difference=$(($current_date-$kube_date_bash))
  diff=$(printf "%02dd %02dh %02dm %02ds" $((kube_date_difference/86400)) $((kube_date_difference%86400/3600)) $((kube_date_difference%3600/60)) $((kube_date_difference%60)))
  data+=",$diff"
  data+=$'\n'
done <<< "$deployments"

# note: this requires "column" from util-linux on Mac
# brew install util-linux
echo "$data" | column --table --separator ","