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|
#!/usr/bin/env ruby
#
# = Synopsis
#
# Trigger a puppetd run on a set of hosts.
#
# = Usage
#
# puppetrun [-a|--all] [-c|--class <class>] [-d|--debug] [-f|--foreground]
# [-h|--help] [--host <host>] [--no-fqdn] [--ignoreschedules]
# [-t|--tag <tag>] [--test]
#
# = Description
#
# This script can be used to connect to a set of machines running +puppetd+
# and trigger them to run their configurations. The most common usage would
# be to specify a class of hosts and a set of tags, and +puppetrun+ would
# look up in LDAP all of the hosts matching that class, then connect to
# each host and trigger a run of all of the objects with the specified tags.
#
# If you are not storing your host configurations in LDAP, you can specify
# hosts manually.
#
# You will most likely have to run +puppetrun+ as root to get access to
# the SSL certificates.
#
# +puppetrun+ reads +puppetmaster+'s configuration file, so that it can copy
# things like LDAP settings.
#
# = Usage Notes
#
# +puppetrun+ is useless unless +puppetd+ is listening. See its documentation
# for more information, but the gist is that you must enable +listen+ on the
# +puppetd+ daemon, either using +--listen+ on the command line or adding
# 'listen: true' in its config file. In addition, you need to set the daemons
# up to specifically allow connections by creating the +namespaceauth+ file,
# normally at '/etc/puppet/namespaceauth.conf'. This file specifies who has
# access to each namespace; if you create the file you must add every namespace
# you want any Puppet daemon to allow -- it is currently global to all Puppet
# daemons.
#
# An example file looks like this:
#
# [fileserver]
# allow *.madstop.com
#
# [puppetmaster]
# allow *.madstop.com
#
# [puppetrunner]
# allow culain.madstop.com
#
# This is what you would install on your Puppet master; non-master hosts could
# leave off the 'fileserver' and 'puppetmaster' namespaces.
#
# Expect more documentation on this eventually.
#
# = Options
#
# Note that any configuration parameter that's valid in the configuration file
# is also a valid long argument. For example, 'ssldir' is a valid configuration
# parameter, so you can specify '--ssldir <directory>' as an argument.
#
# See the configuration file for the full list of acceptable parameters.
#
# all::
# Connect to all available hosts. Requires LDAP support at this point.
#
# class::
# Specify a class of machines to which to connect. This only works if you
# have LDAP configured, at the moment.
#
# debug::
# Enable full debugging.
#
# foreground::
# Run each configuration in the foreground; that is, when connecting to a host,
# do not return until the host has finished its run. The default is false.
#
# help::
# Print this help message
#
# host::
# A specific host to which to connect. This flag can be specified more
# than once.
#
# ignoreschedules::
# Whether the client should ignore schedules when running its configuration.
# This can be used to force the client to perform work it would not normally
# perform so soon. The default is false.
#
# parallel::
# How parallel to make the connections. Parallelization is provided by forking
# for each client to which to connect. The default is 1, meaning serial execution.
#
# tag::
# Specify a tag for selecting the objects to apply.
#
# test::
# Print the hosts you would connect to but do not actually connect.
#
# = Example
#
# sudo puppetrun -p 10 --host host1 --host host2 -t remotefile -t webserver
#
# = Author
#
# Luke Kanies
#
# = Copyright
#
# Copyright (c) 2005 Reductive Labs, LLC
# Licensed under the GNU Public License
[:INT, :TERM].each do |signal|
trap(signal) do
$stderr.puts "Cancelling"
exit(1)
end
end
require 'ldap'
require 'puppet'
require 'puppet/server'
require 'puppet/client'
require 'getoptlong'
# Look up all nodes matching a given class in LDAP.
def ldapnodes(klass, fqdn = true)
unless defined? @ldap
setupldap()
end
hosts = []
filter = nil
if klass == :all
filter = "objectclass=puppetclient"
else
filter = "puppetclass=#{klass}"
end
@ldap.search(Puppet[:ldapbase], 2, filter, "cn") do |entry|
# Skip the default host entry
if entry.dn =~ /cn=default,/
$stderr.puts "Skipping default host entry"
next
end
if fqdn
hosts << entry.dn.sub("cn=",'').sub(/ou=hosts,/i, '').gsub(",dc=",".")
else
hosts << entry.get_values("cn")[0]
end
end
return hosts
end
def setupldap
begin
@ldap = Puppet::Parser::Interpreter.ldap()
rescue => detail
$stderr.puts "Could not connect to LDAP: %s" % detail
exit(34)
end
end
$haveusage = true
begin
require 'rdoc/usage'
rescue LoadError
$haveusage = false
end
flags = [
[ "--all", "-a", GetoptLong::NO_ARGUMENT ],
[ "--class", "-c", GetoptLong::REQUIRED_ARGUMENT ],
[ "--foreground", "-f", GetoptLong::NO_ARGUMENT ],
[ "--debug", "-d", GetoptLong::NO_ARGUMENT ],
[ "--help", "-h", GetoptLong::NO_ARGUMENT ],
[ "--host", GetoptLong::REQUIRED_ARGUMENT ],
[ "--parallel", "-p", GetoptLong::REQUIRED_ARGUMENT ],
[ "--no-fqdn", "-n", GetoptLong::NO_ARGUMENT ],
[ "--test", GetoptLong::NO_ARGUMENT ],
[ "--version", "-V", GetoptLong::NO_ARGUMENT ]
]
# Add all of the config parameters as valid options.
Puppet.config.addargs(flags)
result = GetoptLong.new(*flags)
options = {
:ignoreschedules => false,
:foreground => false,
:parallel => 1,
:debug => false,
:test => false,
:all => false,
:verbose => true,
:fqdn => true
}
hosts = []
classes = []
tags = []
Puppet::Log.newdestination(:console)
begin
result.each { |opt,arg|
case opt
when "--version"
puts "%s" % Puppet.version
exit
when "--ignoreschedules"
options[:ignoreschedules] = true
when "--no-fqdn"
options[:fqdn] = false
when "--all"
options[:all] = true
when "--test"
options[:test] = true
when "--tag"
tags << arg
when "--class"
classes << arg
when "--host"
hosts << arg
when "--help"
if $haveusage
RDoc::usage && exit
else
puts "No help available unless you have RDoc::usage installed"
exit
end
when "--parallel"
begin
options[:parallel] = Integer(arg)
rescue
$stderr.puts "Could not convert %s to an integer" % arg.inspect
exit(23)
end
when "--foreground"
options[:foreground] = true
when "--debug"
options[:debug] = true
else
Puppet.config.handlearg(opt, arg)
end
}
rescue GetoptLong::InvalidOption => detail
$stderr.puts "Try '#{$0} --help'"
#if $haveusage
# RDoc::usage(1,'usage')
#end
exit(1)
end
if options[:debug]
Puppet::Log.level = :debug
else
Puppet::Log.level = :info
end
# Now parse the config
config = File.join(Puppet[:confdir], "puppetmasterd.conf")
if File.exists? config
Puppet.config.parse(config)
end
if Puppet[:ldapnodes]
if options[:all]
hosts = ldapnodes(:all, options[:fqdn])
puts "all: %s" % hosts.join(", ")
else
classes.each do |klass|
list = ldapnodes(klass, options[:fqdn])
puts "%s: %s" % [klass, list.join(", ")]
hosts += list
end
end
elsif ! classes.empty?
$stderr.puts "You must be using LDAP to specify host classes"
exit(24)
end
if tags.empty?
tags = ""
else
tags = tags.join(",")
end
children = {}
# If we get a signal, then kill all of our children and get out.
[:INT, :TERM].each do |signal|
trap(signal) do
Puppet.notice "Caught #{signal}; shutting down"
children.each do |pid, host|
Process.kill("INT", pid)
end
waitall
exit(1)
end
end
if options[:test]
puts "Skipping execution in test mode"
exit(0)
end
todo = hosts.dup
failures = []
# Now do the actual work
go = true
while go
# If we don't have enough children in process and we still have hosts left to
# do, then do the next host.
if children.length < options[:parallel] and ! todo.empty?
host = todo.shift
pid = fork do
# First make sure the client is up
out = %x{ping -c 1 #{host}}
unless $? == 0
$stderr.print "Could not contact %s\n" % host
next
end
client = Puppet::Client::Runner.new(
:Server => host,
:Port => Puppet[:puppetport]
)
print "Triggering %s\n" % host
begin
client.run(tags, options[:ignoreschedules], options[:foreground])
rescue => detail
$stderr.print "Host %s failed: %s\n" % [host, detail]
exit(2)
end
end
children[pid] = host
else
# Else, see if we can reap a process.
begin
pid = Process.wait
if host = children[pid]
# Remove our host from the list of children, so the parallelization
# continues working.
children.delete(pid)
if $?.exitstatus != 0
failures << host
end
print "%s finished with exit code %s\n" % [host, $?.exitstatus]
else
$stderr.puts "Could not find host for PID %s with status %s" %
[pid, $?.exitstatus]
end
rescue Errno::ECHILD
# There are no children left, so just exit unless there are still
# children left to do.
next unless todo.empty?
if failures.empty?
puts "Finished"
exit(0)
else
puts "Failed: %s" % failures.join(", ")
exit(3)
end
end
end
end
# $Id$
|