#!/bin/bash
{% if tripleo_systemd_wrapper_debug|bool -%}
set -x
{% endif -%}
add_date() {
  echo "$(date) $@"
}

# Set up script logging for debugging purpose.
# It will be taken care of by logrotate since there is the .log
# suffix.
exec 3>&1 4>&2
trap 'exec 2>&4 1>&3' 0 1 2 3
exec 1>>/var/log/neutron/kill-script.log 2>&1

SIG=$1
PID=$2
NETNS=$(ip netns identify ${PID})

{% if tripleo_systemd_wrapper_container_cli == 'podman' %}
if [ "x${NETNS}" == "x" ]; then
  CLI="podman"
  SIG=9
else
  CLI="nsenter --net=/run/netns/${NETNS} --preserve-credentials -m -t 1 podman"
fi
{% elif tripleo_systemd_wrapper_container_cli == 'docker' %}
{% if tripleo_systemd_wrapper_docker_additional_sockets is defined and tripleo_systemd_wrapper_docker_additional_sockets | length > 0-%}
export DOCKER_HOST=unix://{{ tripleo_systemd_wrapper_docker_additional_sockets[0] }}
{% endif -%}
CLI='docker'
{% else %}
CLI='echo noop'
{% endif %}

kill_container() {
  add_date "Stopping container $1 ($2)"
  $CLI stop $2
  add_date "Deleting container $1 ($2)"
  $CLI rm $2
}

signal_container() {
  SIGNAL=$3
  if [ -z "$SIGNAL" ]; then
      SIGNAL="HUP"
  fi
  add_date "Sending signal '$SIGNAL' to $1 ($2)"
  $CLI kill --signal $SIGNAL $2
}

{% raw -%}
if [ -f /proc/$PID/cgroup ]; then
  # Get container ID based on process cgroups
  CT_ID=$(awk 'BEGIN {FS="[-.]"} /name=/{print $3}' /proc/$PID/cgroup)
  CT_NAME=$($CLI inspect -f '{{.Name}}' $CT_ID)

  case $SIG in
    HUP)
      signal_container $CT_NAME $CT_ID
      ;;
    9)
      kill_container $CT_NAME $CT_ID
      ;;
    15)
      signal_container $CT_NAME $CT_ID 15
      ;;
    *)
      add_date "Unknown action ${SIG} for ${CT_NAME} ${CT_ID}"
      exit 1
      ;;
  esac

else
  add_date "No such PID: ${PID}"
  exit 1
fi
{% endraw %}
