221 lines
7.5 KiB
Ruby
221 lines
7.5 KiB
Ruby
# Copyright 2013 Mirantis, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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module MCollective
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module Agent
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# An agent to manage the Puppet Daemon
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#
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# Configuration Options:
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# puppetd.splaytime - Number of seconds within which to splay; no splay
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# by default
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# puppetd.statefile - Where to find the state.yaml file; defaults to
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# /var/lib/puppet/state/state.yaml
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# puppetd.lockfile - Where to find the lock file; defaults to
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# /var/lib/puppet/state/puppetdlock
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# puppetd.puppetd - Where to find the puppet binary; defaults to
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# /usr/bin/puppet apply
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# puppetd.summary - Where to find the summary file written by Puppet
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# 2.6.8 and newer; defaults to
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# /var/lib/puppet/state/last_run_summary.yaml
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# puppetd.pidfile - Where to find puppet agent's pid file; defaults to
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# /var/run/puppet/agent.pid
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class Puppetd<RPC::Agent
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def startup_hook
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@splaytime = @config.pluginconf["puppetd.splaytime"].to_i || 0
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@lockfile = @config.pluginconf["puppetd.lockfile"] || "/tmp/puppetd.lock"
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@statefile = @config.pluginconf["puppetd.statefile"] || "/var/lib/puppet/state/state.yaml"
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@pidfile = @config.pluginconf["puppet.pidfile"] || "/var/run/puppet/agent.pid"
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@puppetd = @config.pluginconf["puppetd.puppetd"] || "/usr/sbin/daemonize -a -e /var/log/puppet/puppet.err \
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-o /var/log/puppet/puppet.log \
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-l #{@lockfile} \
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-p #{@lockfile} \
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/usr/bin/puppet apply /etc/puppet/manifests/site.pp"
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@last_summary = @config.pluginconf["puppet.summary"] || "/var/lib/puppet/state/last_run_summary.yaml"
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end
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action "last_run_summary" do
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last_run_summary
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set_status
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end
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action "enable" do
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enable
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end
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action "disable" do
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disable
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end
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action "runonce" do
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runonce
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end
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action "status" do
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set_status
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end
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private
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def last_run_summary
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# wrap into begin..rescue: fixes PRD-252
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begin
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summary = YAML.load_file(@last_summary)
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rescue
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summary = {}
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end
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# It should be empty hash, if 'resources' key is not defined, because otherwise merge will fail with TypeError
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summary["resources"] ||= {}
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# Astute relies on last_run, so we must set last_run
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summary["time"] ||= {}
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summary["time"]["last_run"] ||= 0
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# if 'failed' is not provided, it means something is wrong. So default value is 1.
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reply[:resources] = {"failed"=>1, "changed"=>0, "total"=>0, "restarted"=>0, "out_of_sync"=>0}.merge(summary["resources"])
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["time", "events", "changes", "version"].each do |dat|
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reply[dat.to_sym] = summary[dat]
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end
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end
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def set_status
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reply[:status] = puppet_daemon_status
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reply[:running] = reply[:status] == 'running' ? 1 : 0
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reply[:enabled] = reply[:status] == 'disabled' ? 0 : 1
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reply[:idling] = reply[:status] == 'idling' ? 1 : 0
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reply[:stopped] = reply[:status] == 'stopped' ? 1 : 0
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reply[:lastrun] = 0
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reply[:lastrun] = File.stat(@statefile).mtime.to_i if File.exists?(@statefile)
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reply[:runtime] = Time.now.to_i - reply[:lastrun]
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reply[:output] = "Currently #{reply[:status]}; last completed run #{reply[:runtime]} seconds ago"
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end
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def rm_file file
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begin
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File.unlink(file)
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return true
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rescue
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return false
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end
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end
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def puppet_daemon_status
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err_msg = ""
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alive = !!puppet_agent_pid
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locked = File.exists?(@lockfile)
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disabled = locked && File::Stat.new(@lockfile).zero?
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if locked && !disabled && !alive
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err_msg << "Process not running but not empty lockfile is present. Trying to remove lockfile..."
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err_msg << (rm_file(@lockfile) ? "ok." : "failed.")
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end
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reply[:err_msg] = err_msg if err_msg.any?
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if disabled && !alive
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'disabled'
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elsif disabled && alive
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'running'
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elsif alive && locked
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'running'
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elsif alive && !locked
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'idling'
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elsif !alive
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'stopped'
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end
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end
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def runonce
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set_status
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case (reply[:status])
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when 'disabled' then # can't run
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reply.fail "Empty Lock file exists; puppet is disabled."
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when 'running' then # can't run two simultaniously
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reply.fail "Lock file and PID file exist; puppet is running."
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when 'idling' then # signal daemon
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pid = puppet_agent_pid
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begin
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::Process.kill('INT', pid)
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rescue Errno::ESRCH => e
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reply[:err_msg] = "Failed to signal the puppet apply daemon (process #{pid}): #{e}"
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ensure
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runonce_background
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reply[:output] = "Kill old idling puppet process #{pid})." + (reply[:output] || '')
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end
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when 'stopped' then # just run
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runonce_background
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else
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reply.fail "Unknown puppet status: #{reply[:status]}"
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end
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end
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def runonce_background
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cmd = [@puppetd, "--logdest", 'syslog', '--trace']
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unless request[:forcerun]
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if @splaytime && @splaytime > 0
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cmd << "--splaylimit" << @splaytime << "--splay"
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end
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end
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cmd << '--debug' if request[:puppet_debug]
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cmd = cmd.join(" ")
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output = reply[:output] || ''
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run(cmd, :stdout => :output, :chomp => true)
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reply[:output] = "Called #{cmd}, " + output + (reply[:output] || '')
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end
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def enable
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if File.exists?(@lockfile)
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stat = File::Stat.new(@lockfile)
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if stat.zero?
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File.unlink(@lockfile)
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reply[:output] = "Lock removed"
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else
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reply[:output] = "Currently running; can't remove lock"
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end
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else
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reply[:output] = "Already enabled"
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end
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end
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def disable
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if File.exists?(@lockfile)
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stat = File::Stat.new(@lockfile)
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stat.zero? ? reply[:output] = "Already disabled" : reply.fail("Currently running; can't remove lock")
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else
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begin
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File.open(@lockfile, "w") { |file| }
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reply[:output] = "Lock created"
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rescue => e
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reply.fail "Could not create lock: #{e}"
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end
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end
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end
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def puppet_agent_pid
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result = `ps -C puppet -o pid,comm --no-headers`.lines.first
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result && result.strip.split(' ')[0].to_i
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end
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end
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end
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end
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