weave-scope/extras/dialer/dialer

#!/bin/bash
set -eu
if [ $# -lt 1 ]; then
  echo "Usage: $0 <ip:port> [<max_dialer>]" >&2
  exit 1
fi

readonly addr=$1
readonly max_dialer=${2:-50}

dialer=()
trap 'echo -n "stopping ... "; for c in "${dialer[@]}"; do docker rm -f "$c" >/dev/null; done; echo "done"' EXIT

while true; do
  rand=$(( ( RANDOM % max_dialer )  + 1 ))
  dialer+=("$(docker run -d dialer /go/bin/dialer connect "$addr" "$rand")")

  if [ ${#dialer[@]} -gt "$max_dialer" ]; then
    container=${dialer[$rand]}
    docker rm -f "$container" >/dev/null &
    unset dialer[$rand]
    dialer=("${dialer[@]}")
  fi

  sleep $(( rand % 3 ))
done