localnet-blocks-test.sh

#!/bin/bash

CNT=0
ITER=$1
SLEEP=$2
NUMBLOCKS=$3
NODEADDR=$4

if [ -z "$1" ]; then
  echo "Need to input number of iterations to run..."
  exit 1
fi

if [ -z "$2" ]; then
  echo "Need to input number of seconds to sleep between iterations"
  exit 1
fi

if [ -z "$3" ]; then
  echo "Need to input block height to declare completion..."
  exit 1
fi

if [ -z "$4" ]; then
  echo "Need to input node address to poll..."
  exit 1
fi

docker_containers=( $(docker ps -q -f name=link --format='{{.Names}}') )

while [ ${CNT} -lt $ITER ]; do
  curr_block=$(curl -s $NODEADDR:26657/status | jq -r '.result.sync_info.latest_block_height')

  if [ ! -z ${curr_block} ] ; then
    echo "Number of Blocks: ${curr_block}"
  fi

  if [ ! -z ${curr_block} ] && [ ${curr_block} -gt ${NUMBLOCKS} ]; then
    echo "Number of blocks reached. Success!"
    exit 0
  fi

  # Emulate network chaos:
  #
  # Every 10 blocks, pick a random container and restart it.
  if ! ((${CNT} % 10)); then
    rand_container=${docker_containers["$[RANDOM % ${#docker_containers[@]}]"]};
    echo "Restarting random docker container ${rand_container}"
    docker restart ${rand_container} &>/dev/null &
  fi

  let CNT=CNT+1
  sleep $SLEEP
done

echo "Timeout reached. Failure!"
exit 1