A wrapper entrypoint for istio-proxy, which makes it slightly more graceful shutting down and also adds support for calling envoys quitquitquit endpoint

pilot-agent-agent

#!/bin/bash
echo "Starting custom autotrader pilot-agent wrapper..."
echo "Pilot-agent args: $@"

/usr/local/bin/pilot-agent "$@" &
AGENT_PID=$!
echo "Pilot agent started with pid: $AGENT_PID"

log() {
  echo "[pilot-agent-agent] $*"
}

cleanup()
{
  log "Stopping pilot-agent-agent..."
  log "Waiting up to 20s for existing network connections to close..."
  n=0
  until [ $n -ge 20 ]; do
    remaining="$(netstat -plunt | grep tcp | grep -v envoy | grep -v pilot | wc -l | xargs)"
    if [ "$remaining" -eq 0 ]; then
      log "All network connections have closed."
      break
    fi
    if [ "$(($n%5))" -eq 0 ]; then 
      log "Still waiting for $remaining connections to close"
    fi 
    sleep 1
    n=$[$n+1]
  done 
  log "Stopping pilot-agent..."
  kill -s TERM $AGENT_PID
  exit 0
}
trap cleanup SIGINT SIGTERM

n=0
until [ $n -ge 5 ]; do
  if ! pidof envoy &>/dev/null; then
    log "envoy is not running!"
    n=$[$n+1]
  else
    n=0
    envoy_pid=$(pidof -s envoy)
    log "waiting for envoy (pid: $envoy_pid) to exit..."
    tail --pid=$envoy_pid -f /dev/null 
    log "envoy exited, waiting up to 5 seconds for a new envoy to spawn before killing pilot-agent..."
  fi
  sleep 1
done
log "envoy not detected after 5 seconds, terminating pilot-agent"
cleanup