Test CosmosDB connectivity with newly generated key

test_cosmosdb_connectivity.sh

# Test CosmosDB Connectivity with a given string
function test_connectivity() {
  local connString=$1
  local counter=0
  local successCount=0                # count of successful attempts
  local maxWait=120                   #  max time allowed between loops
  local minWait=5                     # start of process
  local timeOut=$((120 * 60))         # max time allowed until the loop is cancelled
  local waitTime=minWait              # time to wait between loops
  local requiredSuccessConnections=5  # Number of successful connections required
  local backoffRatio=2                # Multiplier for the exponential backoff

  startTime="$(date +%s)"
  # ensure we can connect to CosmosDB at least 5 times successfully
  until [[ "$(($(date +%s)-startTime > timeOut))" -eq 1 ]] || [[ "${successCount}" == "${requiredSuccessConnections}" ]]; do
    if mongosh "${connString}" --eval 'db.stats()'; then
      waitTime=minWait
      ((counter=counter+1))
      ((successCount=successCount+1))
      echo "Successful connection attempts: ${successCount}"
    else
      successCount=0
      waitTime=$((maxWait > $((waitTime*2)) ? waitTime * backoffRatio : maxWait))
      ((counter=counter+1))
      echo "Connection attempt ${counter} unsuccessful, retrying in ${waitTime} seconds..."
      sleep "${waitTime}"
    fi
  done

  if [[ "$(($(date +%s)-startTime > timeOut))" -eq 1 ]]; then
    echo "Reached maximum attempts to connect to CosmosDB, an issue with connectivity is present!"
    exit 1
  else
    echo "Connection successfully established to CosmosDB, proceeding with Key Vault secret update..."
  fi
}