Stop icinga2 logging information-level garbage via systemd

10-loglevel.conf

# Copy to /etc/systemd/system/icinga2.service.d/ (create if needed)
# systemctl daemon reload
# systemctl restart icinga2.service
[Service]
# need to unset ExecStart once because it would try to array it.
ExecStart=
ExecStart=/usr/sbin/icinga2 daemon -e /var/log/icinga2/icinga2.err -x warning

icinga2-systemd-patch-loglevel.sh

#!/bin/sh

# not sure this changes significantly between distributions, but some people are weird.
SYSTEMD_PATH="/etc/systemd/system"

mkdir -p $SYSTEMD_PATH/icinga2.service.d/
cat <<EOF > $SYSTEMD_PATH/icinga2.service.d/10-loglevel.conf
[Service]
# need to unset ExecStart once because it would try to array it.
ExecStart=
ExecStart=/usr/sbin/icinga2 daemon -e /var/log/icinga2/icinga2.err -x warning
EOF

# fancy check if systemd will ask four your password; not that it matters when sudo is installed.
if loginctl show-session $XDG_SESSION_ID | grep Active=yes; then
  systemctl daemon-reload
  read -r -p "Restart icinga2.service? [y/N] " response
  case $response in
    [yY][eE][sS]|[yY])
      systemctl restart icinga2.service
      ;;
    *)
      ;;
  esac
else;
  sudo systemctl daemon-reload
  read -r -p "Restart icinga2.service? [y/N] " response
  case $response in
    [yY][eE][sS]|[yY])
      sudo systemctl restart icinga2.service
      ;;
    *)
      ;;
  esac
fi