diff options
Diffstat (limited to 'bin/puppet_command')
| -rwxr-xr-x | bin/puppet_command | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/bin/puppet_command b/bin/puppet_command new file mode 100755 index 00000000..a6cd5a69 --- /dev/null +++ b/bin/puppet_command @@ -0,0 +1,191 @@ +#!/usr/bin/ruby + +# +# This is a wrapper script around the puppet command used by the LEAP platform. +# +# We do this in order to make it faster and easier to control puppet remotely +# (exit codes, lockfile, multiple manifests, etc) +# + +PUPPET_BIN = '/usr/bin/puppet' +PUPPET_DIRECTORY = '/srv/leap' +PUPPET_PARAMETERS = '--color=false --detailed-exitcodes --libdir=puppet/lib --confdir=puppet' +SITE_MANIFEST = 'puppet/manifests/site.pp' +SETUP_MANIFEST = 'puppet/manifests/setup.pp' +DEFAULT_TAGS = 'leap_base,leap_service' + +def main + process_command_line_arguments + with_lockfile do + @commands.each do |command| + self.send(command) + end + end +end + +def puts(str) + $stdout.puts str + $stdout.flush +end + +def process_command_line_arguments + @commands = [] + @verbosity = 1 + @tags = DEFAULT_TAGS + loop do + case ARGV[0] + when 'apply' then ARGV.shift; @commands << 'apply' + when 'set_hostname' then ARGV.shift; @commands << 'set_hostname' + when '--verbosity' then ARGV.shift; @verbosity = ARGV.shift.to_i + when '--force' then ARGV.shift; remove_lockfile + when '--tags' then ARGV.shift; @tags = ARGV.shift + when /^-/ then usage("Unknown option: #{ARGV[0].inspect}") + else break + end + end + usage("No command given") unless @commands.any? +end + +def apply + exit_code = puppet_apply do |line| + puts line + end + puts "Puppet apply complete (#{exitcode_description(exit_code)})." +end + +def set_hostname + exit_code = puppet_apply(:manifest => SETUP_MANIFEST, :tags => '') do |line| + # todo: replace setup.pp with https://github.com/lutter/ruby-augeas + # or try this: http://www.puppetcookbook.com/posts/override-a-facter-fact.html + if (line !~ /Finished catalog run/ || @verbosity > 2) && + (line !~ /dnsdomainname: Name or service not known/) && + (line !~ /warning: Could not retrieve fact fqdn/) + puts line + end + end + if exit_code == 2 + puts "Hostname updated." + elsif exit_code == 4 || exit_code == 6 + puts "ERROR: could not update hostname." + elsif exit_code == 0 && @verbosity > 1 + puts "No change to hostname." + end +end + +# +# each line of output is yielded. the exit code is returned. +# +def puppet_apply(options={}, &block) + options = {:verbosity => @verbosity, :tags => @tags}.merge(options) + manifest = options[:manifest] || SITE_MANIFEST + Dir.chdir(PUPPET_DIRECTORY) do + return run("#{PUPPET_BIN} apply #{custom_parameters(options)} #{PUPPET_PARAMETERS} #{manifest}", &block) + end +end + +def custom_parameters(options) + params = [] + if options[:tags] && options[:tags].chars.any? + params << "--tags #{options[:tags]}" + end + if options[:verbosity] + case options[:verbosity] + when 3 then params << '--verbose' + when 4 then params << '--verbose --debug' + when 5 then params << '--verbose --debug --trace' + end + end + params.join(' ') +end + +def exitcode_description(code) + case code + when 0 then "no changes" + when 1 then "failed" + when 2 then "changes made" + when 4 then "failed" + when 6 then "changes and failures" + else code + end +end + +def usage(s) + $stderr.puts(s) + $stderr.puts + $stderr.puts("Usage: #{File.basename($0)} COMMAND [OPTIONS]") + $stderr.puts + $stderr.puts("COMMAND may be one or more of: + set_hostname -- set the hostname of this server + apply -- apply puppet manifests") + $stderr.puts + $stderr.puts("OPTIONS may be one or more of: + --verbosity VERB -- set the verbosity level 0..5 + --tags TAGS -- set the tags to pass through to puppet + --force -- run even when lockfile is present") + exit(2) +end + +## +## Simple lock file +## + +require 'fileutils' +DEFAULT_LOCKFILE = '/tmp/puppet.lock' + +def remove_lockfile(lock_file_path=DEFAULT_LOCKFILE) + FileUtils.remove_file(lock_file_path, true) +end + +def with_lockfile(lock_file_path=DEFAULT_LOCKFILE) + begin + File.open(lock_file_path, File::CREAT | File::EXCL | File::WRONLY) do |o| + o.write(Process.pid) + end + yield + remove_lockfile + rescue Errno::EEXIST + puts("ERROR: the lock file '#{lock_file_path}' already exists. Wait a minute for the process to die, or run with --force to ignore. Bailing out.") + exit(1) + rescue IOError => exc + puts("ERROR: problem with lock file '#{lock_file_path}' (#{exc}). Bailing out.") + exit(1) + end +end + +## +## simple pass through process runner (to ensure output is not buffered and return exit code) +## this only works under ruby 1.9 +## + +require "pty" + +def run(cmd) + puts cmd if @verbosity >= 3 + PTY.spawn("#{cmd}") do |output, input, pid| + begin + while line = output.gets do + yield line + #$stdout.puts line + #$stdout.flush + end + rescue Errno::EIO + end + Process.wait(pid) # only works in ruby 1.9, required to capture the exit status. + end + status = $?.exitstatus + #yield status if block_given? + return status +rescue PTY::ChildExited +end + +## +## RUN MAIN +## + +Signal.trap("EXIT") do + remove_lockfile # clean up the lockfile when process is terminated. + # this will remove the lockfile if ^C killed the process + # but only after the child puppet process is also dead (I think). +end + +main()
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