let's encrypt hook for reloading murmurd ssl certificates

letsencrypt-murmur-hook.sh

#!/bin/bash

LETSENCRYPT_DIR="/etc/letsencrypt/live/mumble.domain.tld"
MUMBLE_CERT_DIR="/opt/docker/murmur/cert"

DOCKER_CONTAINER="murmur"

DOCKER_MUMBLE_UID=2137
DOCKER_MUMBLE_GID=2137

# cleanup
rm -f "${MUMBLE_CERT_DIR}"/{privkey*,fullchain*}.pem
# copy newly generated certs 
cp $(readlink -f "${LETSENCRYPT_DIR}"/{privkey*,fullchain*}.pem) "${MUMBLE_CERT_DIR}"
# rename certificates accordingly 
for i in "${MUMBLE_CERT_DIR}"/*.pem
do
  mv "${i}" "$(echo "${i}" | sed 's#\([a-zA-Z]*\)\([0-9]*\)\.pem#\1\.pem#g')"
done
# set proper permissions
chown "${DOCKER_MUMBLE_UID}":"${DOCKER_MUMBLE_GID}" "${MUMBLE_CERT_DIR}"/{privkey,fullchain}.pem
# reload certificates
docker exec -dt "${DOCKER_CONTAINER}" /usr/bin/killall -SIGUSR1 murmur.x86