community.general/lib/ansible/callbacks.py

# (C) 2012, Michael DeHaan, <michael.dehaan@gmail.com>

# This file is part of Ansible
#
# Ansible 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.
#
# Ansible 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 Ansible.  If not, see <http://www.gnu.org/licenses/>.

import utils
import sys
import getpass
import os
import subprocess

cowsay = None
if os.path.exists("/usr/bin/cowsay"):
    cowsay = "/usr/bin/cowsay"
elif os.path.exists("/usr/games/cowsay"):
    cowsay = "/usr/games/cowsay"

class AggregateStats(object):
    ''' holds stats about per-host activity during playbook runs '''   
 
    def __init__(self):

        self.processed   = {}
        self.failures    = {}
        self.ok          = {}
        self.dark        = {}
        self.changed     = {}
        self.skipped     = {}

    def _increment(self, what, host):
        ''' helper function to bump a statistic '''

        self.processed[host] = 1
        prev = (getattr(self, what)).get(host, 0)
        getattr(self, what)[host] = prev+1

    def compute(self, runner_results, setup=False, poll=False):
        ''' walk through all results and increment stats '''
 
        for (host, value) in runner_results.get('contacted', {}).iteritems():
            if ('failed' in value and bool(value['failed'])) or ('rc' in value and value['rc'] != 0):
                self._increment('failures', host)
            elif 'skipped' in value and bool(value['skipped']):
                self._increment('skipped', host)
            elif 'changed' in value and bool(value['changed']):
                if not setup and not poll:
                    self._increment('changed', host)
                self._increment('ok', host)
            else:
                if not poll or ('finished' in value and bool(value['finished'])):
                    self._increment('ok', host)

        for (host, value) in runner_results.get('dark', {}).iteritems():
            self._increment('dark', host)
            

    def summarize(self, host):
        ''' return information about a particular host '''

        return dict(
            ok          = self.ok.get(host, 0),
            failures    = self.failures.get(host, 0),
            unreachable = self.dark.get(host,0),
            changed     = self.changed.get(host, 0),
            skipped     = self.skipped.get(host, 0)
        )

########################################################################

def regular_generic_msg(hostname, result, oneline, caption):
    ''' output on the result of a module run that is not command '''

    if not oneline:
        return "%s | %s >> %s\n" % (hostname, caption, utils.jsonify(result,format=True))
    else:
        return "%s | %s >> %s\n" % (hostname, caption, utils.jsonify(result))


def banner(msg):

    if cowsay != None:
        cmd = subprocess.Popen("%s -W 60 \"%s\"" % (cowsay, msg), 
            stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
        (out, err) = cmd.communicate()
        return "%s\n" % out 
    else:
        return "\n%s ********************* " % msg

def command_generic_msg(hostname, result, oneline, caption):
    ''' output the result of a command run '''

    rc     = result.get('rc', '0')
    stdout = result.get('stdout','')
    stderr = result.get('stderr', '')
    msg    = result.get('msg', '')

    if not oneline:
        buf = "%s | %s | rc=%s >>\n" % (hostname, caption, result.get('rc',0))
        if stdout:
            buf += stdout
        if stderr:
            buf += stderr
        if msg:
            buf += msg
        return buf + "\n"
    else:
        if stderr:
            return "%s | %s | rc=%s | (stdout) %s (stderr) %s\n" % (hostname, caption, rc, stdout, stderr)
        else:
            return "%s | %s | rc=%s | (stdout) %s\n" % (hostname, caption, rc, stdout)

def host_report_msg(hostname, module_name, result, oneline):
    ''' summarize the JSON results for a particular host '''

    failed = utils.is_failed(result)
    if module_name in [ 'command', 'shell', 'raw' ] and 'ansible_job_id' not in result:
        if not failed:
            return command_generic_msg(hostname, result, oneline, 'success')
        else:
            return command_generic_msg(hostname, result, oneline, 'FAILED')
    else:
        if not failed:
            return regular_generic_msg(hostname, result, oneline, 'success')
        else:
            return regular_generic_msg(hostname, result, oneline, 'FAILED')


###############################################

class DefaultRunnerCallbacks(object):
    ''' no-op callbacks for API usage of Runner() if no callbacks are specified '''

    def __init__(self):
        pass

    def on_failed(self, host, res):
        pass

    def on_ok(self, host, res):
        pass

    def on_error(self, host, msg):
        pass

    def on_skipped(self, host):
        pass

    def on_unreachable(self, host, res):
        pass

    def on_no_hosts(self):
        pass

    def on_async_poll(self, host, res, jid, clock):
        pass

    def on_async_ok(self, host, res, jid):
        pass

    def on_async_failed(self, host, res, jid):
        pass

########################################################################

class CliRunnerCallbacks(DefaultRunnerCallbacks):
    ''' callbacks for use by /usr/bin/ansible '''

    def __init__(self):

        # set by /usr/bin/ansible later
        self.options = None 
        self._async_notified = {}

    def on_failed(self, host, res):

        self._on_any(host,res)

    def on_ok(self, host, res):

        self._on_any(host,res)
 
    def on_unreachable(self, host, res):

        if type(res) == dict:
            res = res.get('msg','')
        print "%s | FAILED => %s" % (host, res)
        if self.options.tree:
            utils.write_tree_file(
                self.options.tree, host, 
                utils.jsonify(dict(failed=True, msg=res),format=True)
            )
 
    def on_skipped(self, host):
        pass

    def on_error(self, host, err):

        print >>sys.stderr, "err: [%s] => %s\n" % (host, err)
    
    def on_no_hosts(self):

        print >>sys.stderr, "no hosts matched\n"

    def on_async_poll(self, host, res, jid, clock):

        if jid not in self._async_notified:
            self._async_notified[jid] = clock + 1
        if self._async_notified[jid] > clock:
            self._async_notified[jid] = clock
            print "<job %s> polling, %ss remaining"%(jid, clock)

    def on_async_ok(self, host, res, jid):

        print "<job %s> finished on %s => %s"%(jid, host, utils.jsonify(res,format=True))

    def on_async_failed(self, host, res, jid):

        print "<job %s> FAILED on %s => %s"%(jid, host, utils.jsonify(res,format=True))

    def _on_any(self, host, result):

        print host_report_msg(host, self.options.module_name, result, self.options.one_line)
        if self.options.tree:
            utils.write_tree_file(self.options.tree, host, utils.json(result,format=True))

########################################################################

class PlaybookRunnerCallbacks(DefaultRunnerCallbacks):
    ''' callbacks used for Runner() from /usr/bin/ansible-playbook '''

    def __init__(self, stats, verbose=False):

        self.stats = stats
        self._async_notified = {}
        self.verbose = verbose

    def on_unreachable(self, host, msg):

        print "fatal: [%s] => %s" % (host, msg)

    def on_failed(self, host, results):

        print "failed: [%s] => %s" % (host, utils.jsonify(results))

    def on_ok(self, host, host_result):

        # show verbose output for non-setup module results if --verbose is used
        if not self.verbose or host_result.get("verbose_override",None) is not None:
            print "ok: [%s]" % (host)
        else:
            print "ok: [%s] => %s" % (host, utils.jsonify(host_result))

    def on_error(self, host, err):

        print >>sys.stderr, "err: [%s] => %s" % (host, err)

    def on_skipped(self, host):

        print "skipping: [%s]" % host

    def on_no_hosts(self):

        print "no hosts matched or remaining\n"

    def on_async_poll(self, host, res, jid, clock):

        if jid not in self._async_notified:
            self._async_notified[jid] = clock + 1
        if self._async_notified[jid] > clock:
            self._async_notified[jid] = clock
            print "<job %s> polling, %ss remaining"%(jid, clock)

    def on_async_ok(self, host, res, jid):

        print "<job %s> finished on %s"%(jid, host)

    def on_async_failed(self, host, res, jid):

        print "<job %s> FAILED on %s"%(jid, host)

########################################################################

class PlaybookCallbacks(object):
    ''' playbook.py callbacks used by /usr/bin/ansible-playbook '''
  
    def __init__(self, verbose=False):

        self.verbose = verbose

    def on_start(self):

        pass

    def on_notify(self, host, handler):

        pass

    def on_task_start(self, name, is_conditional):

        msg = "TASK: [%s]" % name
        if is_conditional:
            msg = "NOTIFIED: [%s]" % name
        print banner(msg)

    def on_vars_prompt(self, varname, private=True):

        msg = 'input for %s: ' % varname
        if private:
            return getpass.getpass(msg)
        return raw_input(msg)
        
    def on_setup(self):

        print banner("GATHERING FACTS")
    
    def on_import_for_host(self, host, imported_file):

        print "%s: importing %s" % (host, imported_file)

    def on_not_import_for_host(self, host, missing_file):

        print "%s: not importing file: %s" % (host, missing_file)

    def on_play_start(self, pattern):

        print banner("PLAY [%s]" % pattern)