Add a script to simplify verification of deployments

Author: bianchi2

scripts/wait-deployment.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+# $1 is object name, $2 is namespace name, $3 is timeout
+
+printError() {
+  echo "Failed to verify deployment $1. Current replicas is '${CUNNRENT_COUNT}'"
+  echo "Pods in $2 namespace:"
+  kubectl get pods -n $2
+  echo "Events in $2 namespace:"
+  kubectl get events -n $2
+}
+
+if [ -z $1 ] || [ -z $2 ]; then
+  echo "Deployment name and namespace are mandarory arguments. Rerun the script with deployment name and namespace as args"
+  exit 1
+fi
+DEPLOYMENT=$1
+NAMESPACE=$2
+DEFAULT_TIMEOUT=300
+TIMEOUT=${3:-${DEFAULT_TIMEOUT}}
+echo "Waiting for deployment $DEPLOYMENT. Timeout in $TIMEOUT seconds"
+REQUIRED_COUNT=1
+CUNNRENT_COUNT=$(kubectl get deployment/$DEPLOYMENT -n $NAMESPACE -o=jsonpath='{.status.availableReplicas}')
+if [ $? -ne 0 ]; then
+  echo "An error occurred. Exiting"
+  exit 1
+fi
+SLEEP=5
+exit=$((SECONDS+TIMEOUT))
+while [ "${CUNNRENT_COUNT}" -ne "${REQUIRED_COUNT}" ] && [ ${SECONDS} -lt ${exit} ]; do
+  CUNNRENT_COUNT=$(kubectl get deployment/$DEPLOYMENT -n $NAMESPACE -o=jsonpath='{.status.availableReplicas}')
+  timeout_in=$((exit-SECONDS))
+  sleep ${SLEEP}
+done
+
+if [ "${CUNNRENT_COUNT}" -ne "${REQUIRED_COUNT}"  ]; then
+  printError $DEPLOYMENT $NAMESPACE
+  exit 1
+elif [ ${SECONDS} -ge ${exit} ]; then
+  echo "Deployment $DEPLOYMENT timed out. Current replicas is ${CUNNRENT_COUNT}"
+  printError $DEPLOYMENT $NAMESPACE
+  exit 1
+fi
+echo "Deployment $1 successfully scaled"