cdist/bin/cdist-mass-deploy

#!/bin/sh
#
# 2011 Nico Schottelius (nico-cdist at schottelius.org)
#
# This file is part of cdist.
#
# cdist is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# cdist is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with cdist. If not, see <http://www.gnu.org/licenses/>.
#
#
# Deploy configuration to many hosts
#

. cdist-config
[ $# -ge 1 ] || __cdist_usage "[-p] <target host> [target host ]"
set -u

# trap __cdist_tmp_removal EXIT
trap killandclean EXIT

killandclean()
{
   # i may have been altered outside, just use the current offset
   while [ "$i" -gt 0 ]; do
      eval pid=\$pid_$i
      kill "$pid"
      i=$((i-1))
   done

   # Ensure tmp stuff is being removed
   __cdist_tmp_removal
}


filter()
{
   awk -v host=$1 '{ print "[" host "] " $0 }'
}

parallel=""
if [ "$1" = "-p" ]; then
   parallel=yes
   shift
fi

i=0
while [ $# -gt 0 ]; do
   if [ "$parallel" ]; then
      cdist-deploy-to "$1" | filter "$1" &
      # Record pid and host for use later
      i=$((i+1))
      eval pid_$i=$!
      eval host_$i=\$1
   else
      cdist-deploy-to "$1" | filter "$1"
   fi
   shift
done

e=0
if [ "$parallel" ]; then
   __cdist_echo info "Waiting for cdist-deploy-to jobs to finish"
   while [ "$i" -gt 0 ]; do
      eval pid=\$pid_$i
      wait "$pid"
      if [ $? -ne 0 ]; then
         e=$((e+1))
         eval e_host_$e=\$host_$i
      fi
      i=$((i-1))
   done
fi

# Display all failed hosts after all runs are done, so the sysadmin gets them
while [ "$e" -gt 0 ]; do
   eval host=\$host_$e
   __cdist_echo error "Configuration of host $host failed."
   e=$((e-1))
done