scripts/trigger-rcmd

   1 #!/bin/sh
   2 #
   3 # trigger-rcmp: Trigger remote commands
   4 # Copyright (c)2014 Alexander Barton (alex@barton.de)
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 2 of the License, or
   9 # (at your option) any later version.
  10 # Please read the file COPYING, README and AUTHORS for more information.
  11 #
  12
  13 NAME="`basename "$0"`"
  14 RCMD_D="/usr/local/etc/rcmd.d"
  15
  16 PATH="$PATH:/usr/local/sbin:/usr/sbin"
  17
  18 do_help() {
  19         echo "Usage: $0 <rcmd> [<rcmd> [...]]" >&2
  20         exit 2
  21 }
  22
  23 do_rcmd() {
  24         SYSTEM="localhost"
  25         IFACE="eth0"
  26         CMD="uptime"
  27         TIMEOUT="180"
  28         SSH_CHECKS="6"
  29         WAKE_DELAY="10s"
  30         SHUTDOWN_TIME="+10"
  31
  32         . "$cnf"
  33
  34         if [ $? -ne 0 ]; then
  35                 echo "$NAME: failed to read \"$cnf\"!"
  36                 return 2
  37         fi
  38
  39         NAME="$NAME($1)"
  40
  41         echo "$NAME: checking system \"$SYSTEM\" ..."
  42         fping -c1 -q "$SYSTEM" 2>/dev/null
  43         if [ $? -ne 0 ]; then
  44                 if [ -n "$NO_WAKE" ]; then
  45                         echo "$NAME: \"$SYSTEM\" seems to be down, skipping job."
  46                         return 9
  47                 fi
  48
  49                 echo "$NAME: \"$SYSTEM\" seems to be down, wake it up ..."
  50                 etherwake -b -i "$IFACE" `echo "$SYSTEM" | cut -d'.' -f1`
  51                 if [ $? -ne 0 ]; then
  52                         echo "$NAME: failed to wake \"$SYSTEM\"!" >&2
  53                         return 3
  54                 fi
  55                 echo "$NAME: waiting for \"$SYSTEM\" to respond ..."
  56                 for i in `seq 1 $TIMEOUT`; do
  57                         fping -c1 -q "$SYSTEM" 2>/dev/null
  58                         [ $? -ne 0 ] || break
  59                         sleep 1s
  60                 done
  61                 fping -c1 -q "$SYSTEM" 2>/dev/null
  62                 if [ $? -ne 0 ]; then
  63                         echo "$NAME: failed to wake \"$SYSTEM\"!" >&2
  64                         return 4
  65                 fi
  66                 sleep "$WAKE_DELAY"
  67                 rsys_was_running=0
  68         else
  69                 echo "$NAME: \"$SYSTEM\" is already alive, ok."
  70                 rsys_was_running=1
  71         fi
  72
  73         for i in `seq 1 $SSH_CHECKS`; do
  74                 echo "$NAME: checking SSH connection ($i/$SSH_CHECKS) ..."
  75                 ssh -q "$SYSTEM" true >/dev/null 2>&1 && break
  76                 echo "$NAME: SSH on \"$SYSTEM\" not ready. Waiting ..."
  77                 sleep 10s
  78         done
  79
  80         echo "$NAME: calling \"$CMD\" on \"$SYSTEM\" ..."
  81         echo
  82
  83         ssh -q "$SYSTEM" "$CMD" </dev/null ; r=$?
  84
  85         echo
  86         echo "$NAME: remote command ended with return code $r."
  87         sleep 2
  88
  89         if [ "$rsys_was_running" -eq 0 ]; then
  90                 rsys_users=`ssh -q "$SYSTEM" w | tail -n +3 | wc -l`
  91                 if [ "$rsys_users" = "0" ]; then
  92                         echo "$NAME: power off \"$SYSTEM\" again ..."
  93                         ssh -q "$SYSTEM" "sync; shutdown -hP $SHUTDOWN_TIME" >/dev/null
  94                         if [ $? -ne 0 ]; then
  95                                 echo "$NAME: failed to power off \"$SYSTEM\"!" >&2
  96                                 return 5
  97                         fi
  98                 else
  99                         echo "$NAME: not shutting down \"$SYSTEM\", \c"
 100                         [ $rsys_users -eq 1 ] \
 101                                 && echo "there is 1 user logged in!" \
 102                                 || echo "there are $rsys_users users logged in!"
 103                 fi
 104         else
 105                 echo "$NAME: \"$SYSTEM\" was already alive, not shutting down."
 106         fi
 107         [ $r -eq 0 ] && return 0 || return 1
 108 }
 109
 110 # Defaults
 111 NO_WAKE=
 112
 113 while [ $# -gt 0 ]; do
 114         case "$1" in
 115           --no-wake|-n)
 116                 NO_WAKE=1; ;;
 117           --help|-*)
 118                 do_help; ;;
 119           *)
 120                 break
 121         esac
 122         shift
 123 done
 124
 125 [ $# -gt 0 ] || do_help
 126
 127 result=0
 128 while [ $# -gt 0 ]; do
 129         cnf="$RCMD_D/$1"
 130         if [ ! -r "$cnf" ]; then
 131                 echo "$NAME: can't read \"$cnf\"!"
 132                 r=1
 133         else
 134                 echo "$NAME: working on \"$1\" - `date "+%Y-%m-%d %H:%M:%S"`"
 135                 do_rcmd "$1" ; r=$?
 136                 echo "$NAME: done ($r) - `date "+%Y-%m-%d %H:%M:%S"`"
 137         fi
 138         [ $r -ne 0 ] && result=1
 139         shift
 140         [ $# -gt 0 ] && echo
 141 done
 142 exit $result