iankelling.org Git - log-quiet/blob - sysd-prom-fail-install

   1 #!/bin/bash
   2 # I, Ian Kelling, follow the GNU license recommendations at
   3 # https://www.gnu.org/licenses/license-recommendations.en.html. They
   4 # recommend that small programs, < 300 lines, be licensed under the
   5 # Apache License 2.0. This file contains or is part of one or more small
   6 # programs. If a small program grows beyond 300 lines, I plan to switch
   7 # its license to GPL.
   8
   9 # Copyright 2024 Ian Kelling
  10
  11 # Licensed under the Apache License, Version 2.0 (the "License");
  12 # you may not use this file except in compliance with the License.
  13 # You may obtain a copy of the License at
  14
  15 #     http://www.apache.org/licenses/LICENSE-2.0
  16
  17 # Unless required by applicable law or agreed to in writing, software
  18 # distributed under the License is distributed on an "AS IS" BASIS,
  19 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  20 # See the License for the specific language governing permissions and
  21 # limitations under the License.
  22
  23
  24 # usage: since this is a counter, in prometheus alert manager you will
  25 # need to test something like: rate(node_systemd_unit_result_fail_count[30m]) > 0
  26
  27 source /a/bin/bash-bear-trap/bash-bear
  28 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
  29
  30 ser_name=$1
  31
  32 mkdir -p /var/lib/prometheus/node-exporter
  33
  34 f=/var/local/sysd-prom-fail/${ser_name}-result.prom
  35
  36
  37 if [[ ! -s $f ]]; then
  38   SERVICE_RESULT=success /usr/local/bin/sysd-prom-fail $ser_name
  39 fi
  40
  41 tmp=$(mktemp)
  42
  43 cat >>$tmp <<EOF
  44 [Service]
  45 ExecStopPost=+/usr/local/bin/sysd-prom-fail $ser_name
  46 EOF
  47
  48 dir=/etc/systemd/system/$ser_name.service.d
  49 mkdir -p $dir
  50 out=$(rsync -cipgo --chmod=644 --chown=root:root $tmp $dir/sysd-prom-fail.conf)
  51 if [[ $out ]]; then
  52   echo $0: systemctl daemon-reload
  53   systemctl daemon-reload
  54   if systemctl is-active $ser_name &>/dev/null; then
  55     echo $0: systemctl restart $ser_name
  56     systemctl restart $ser_name ||:
  57   fi
  58 fi
  59
  60 # todo: make uninstall script