ansible/system/service
2013-06-18 20:19:29 -04:00

1080 lines
39 KiB
Python

#!/usr/bin/python
# -*- coding: utf-8 -*-
# (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/>.
DOCUMENTATION = '''
---
module: service
author: Michael DeHaan
version_added: "0.1"
short_description: Manage services.
description:
- Controls services on remote hosts.
options:
name:
required: true
description:
- Name of the service.
state:
required: false
choices: [ started, stopped, restarted, reloaded ]
description:
- C(started)/C(stopped) are idempotent actions that will not run
commands unless necessary. C(restarted) will always bounce the
service. C(reloaded) will always reload. At least one of state
and enabled are required.
pattern:
required: false
version_added: "0.7"
description:
- If the service does not respond to the status command, name a
substring to look for as would be found in the output of the I(ps)
command as a stand-in for a status result. If the string is found,
the service will be assumed to be running.
enabled:
required: false
choices: [ "yes", "no" ]
description:
- Whether the service should start on boot. At least one of state and
enabled are required.
runlevel:
required: false
default: 'default'
description:
- For OpenRC init scripts (ex: Gentoo) only. The runlevel that this service belongs to.
arguments:
description:
- Additional arguments provided on the command line
aliases: [ 'args' ]
'''
EXAMPLES = '''
# Example action to start service httpd, if not running
- service: name=httpd state=started
# Example action to stop service httpd, if running
- service: name=httpd state=stopped
# Example action to restart service httpd, in all cases
- service: name=httpd state=restarted
# Example action to reload service httpd, in all cases
- service: name=httpd state=reloaded
# Example action to enable service httpd, and not touch the running state
- service: name=httpd enabled=yes
# Example action to start service foo, based on running process /usr/bin/foo
- service: name=foo pattern=/usr/bin/foo state=started
# Example action to restart network service for interface eth0
- service: name=network state=restarted args=eth0
'''
import platform
import os
import re
import tempfile
import shlex
import select
class Service(object):
"""
This is the generic Service manipulation class that is subclassed
based on platform.
A subclass should override the following action methods:-
- get_service_tools
- service_enable
- get_service_status
- service_control
All subclasses MUST define platform and distribution (which may be None).
"""
platform = 'Generic'
distribution = None
def __new__(cls, *args, **kwargs):
return load_platform_subclass(Service, args, kwargs)
def __init__(self, module):
self.module = module
self.name = module.params['name']
self.state = module.params['state']
self.pattern = module.params['pattern']
self.enable = module.params['enabled']
self.runlevel = module.params['runlevel']
self.changed = False
self.running = None
self.crashed = None
self.action = None
self.svc_cmd = None
self.svc_initscript = None
self.svc_initctl = None
self.enable_cmd = None
self.arguments = module.params.get('arguments', '')
self.rcconf_file = None
self.rcconf_key = None
self.rcconf_value = None
# select whether we dump additional debug info through syslog
self.syslogging = False
# ===========================================
# Platform specific methods (must be replaced by subclass).
def get_service_tools(self):
self.module.fail_json(msg="get_service_tools not implemented on target platform")
def service_enable(self):
self.module.fail_json(msg="service_enable not implemented on target platform")
def get_service_status(self):
self.module.fail_json(msg="get_service_status not implemented on target platform")
def service_control(self):
self.module.fail_json(msg="service_control not implemented on target platform")
# ===========================================
# Generic methods that should be used on all platforms.
def execute_command(self, cmd, daemonize=False):
if self.syslogging:
syslog.openlog('ansible-%s' % os.path.basename(__file__))
syslog.syslog(syslog.LOG_NOTICE, 'Command %s, daemonize %r' % (cmd, daemonize))
# Most things don't need to be daemonized
if not daemonize:
return self.module.run_command(cmd)
# This is complex because daemonization is hard for people.
# What we do is daemonize a part of this module, the daemon runs the
# command, picks up the return code and output, and returns it to the
# main process.
pipe = os.pipe()
pid = os.fork()
if pid == 0:
os.close(pipe[0])
# Set stdin/stdout/stderr to /dev/null
fd = os.open(os.devnull, os.O_RDWR)
if fd != 0:
os.dup2(fd, 0)
if fd != 1:
os.dup2(fd, 1)
if fd != 2:
os.dup2(fd, 2)
if fd not in (0, 1, 2):
os.close(fd)
# Make us a daemon. Yes, that's all it takes.
pid = os.fork()
if pid > 0:
os._exit(0)
os.setsid()
os.chdir("/")
pid = os.fork()
if pid > 0:
os._exit(0)
# Start the command
p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, preexec_fn=lambda: os.close(pipe[1]))
stdout = ""
stderr = ""
fds = [p.stdout, p.stderr]
# Wait for all output, or until the main process is dead and its output is done.
while fds:
rfd, wfd, efd = select.select(fds, [], fds, 1)
if not (rfd + wfd + efd) and p.poll() is not None:
break
if p.stdout in rfd:
dat = os.read(p.stdout.fileno(), 4096)
if not dat:
fds.remove(p.stdout)
stdout += dat
if p.stderr in rfd:
dat = os.read(p.stderr.fileno(), 4096)
if not dat:
fds.remove(p.stderr)
stderr += dat
p.wait()
# Return a JSON blob to parent
os.write(pipe[1], json.dumps([p.returncode, stdout, stderr]))
os.close(pipe[1])
os._exit(0)
elif pid == -1:
self.module.fail_json(msg="unable to fork")
else:
os.close(pipe[1])
os.waitpid(pid, 0)
# Wait for data from daemon process and process it.
data = ""
while True:
rfd, wfd, efd = select.select([pipe[0]], [], [pipe[0]])
if pipe[0] in rfd:
dat = os.read(pipe[0], 4096)
if not dat:
break
data += dat
return json.loads(data)
def check_ps(self):
# Set ps flags
if platform.system() == 'SunOS':
psflags = '-ef'
else:
psflags = 'auxww'
# Find ps binary
psbin = self.module.get_bin_path('ps', True)
(rc, psout, pserr) = self.execute_command('%s %s' % (psbin, psflags))
# If rc is 0, set running as appropriate
if rc == 0:
self.running = False
lines = psout.split("\n")
for line in lines:
if self.pattern in line and not "pattern=" in line:
# so as to not confuse ./hacking/test-module
self.running = True
break
def check_service_changed(self):
if self.state and self.running is None:
self.module.fail_json(msg="failed determining service state, possible typo of service name?")
# Find out if state has changed
if not self.running and self.state in ["started", "running"]:
self.changed = True
elif self.running and self.state in ["stopped","reloaded"]:
self.changed = True
elif self.state == "restarted":
self.changed = True
if self.module.check_mode and self.changed:
self.module.exit_json(changed=True, msg='service state changed')
def modify_service_state(self):
# Only do something if state will change
if self.changed:
# Control service
if self.state in ['started', 'running']:
self.action = "start"
elif self.state == 'stopped':
self.action = "stop"
elif self.state == 'reloaded':
self.action = "reload"
elif self.state == 'restarted':
self.action = "restart"
if self.module.check_mode:
self.module.exit_json(changed=True, msg='changing service state')
return self.service_control()
else:
# If nothing needs to change just say all is well
rc = 0
err = ''
out = ''
return rc, out, err
def service_enable_rcconf(self):
if self.rcconf_file is None or self.rcconf_key is None or self.rcconf_value is None:
self.module.fail_json(msg="service_enable_rcconf() requires rcconf_file, rcconf_key and rcconf_value")
changed = None
entry = '%s="%s"\n' % (self.rcconf_key, self.rcconf_value)
RCFILE = open(self.rcconf_file, "r")
new_rc_conf = []
# Build a list containing the possibly modified file.
for rcline in RCFILE:
# Parse line removing whitespaces, quotes, etc.
rcarray = shlex.split(rcline, comments=True)
if len(rcarray) >= 1 and '=' in rcarray[0]:
(key, value) = rcarray[0].split("=", 1)
if key == self.rcconf_key:
if value == self.rcconf_value:
# Since the proper entry already exists we can stop iterating.
changed = False
break
else:
# We found the key but the value is wrong, replace with new entry.
rcline = entry
changed = True
# Add line to the list.
new_rc_conf.append(rcline)
# We are done with reading the current rc.conf, close it.
RCFILE.close()
# If we did not see any trace of our entry we need to add it.
if changed is None:
new_rc_conf.append(entry)
changed = True
if changed is True:
if self.module.check_mode:
self.module.exit_json(changed=True, msg="changing service enablement")
# Create a temporary file next to the current rc.conf (so we stay on the same filesystem).
# This way the replacement operation is atomic.
rcconf_dir = os.path.dirname(self.rcconf_file)
rcconf_base = os.path.basename(self.rcconf_file)
(TMP_RCCONF, tmp_rcconf_file) = tempfile.mkstemp(dir=rcconf_dir, prefix="%s-" % rcconf_base)
# Write out the contents of the list into our temporary file.
for rcline in new_rc_conf:
os.write(TMP_RCCONF, rcline)
# Close temporary file.
os.close(TMP_RCCONF)
# Replace previous rc.conf.
self.module.atomic_move(tmp_rcconf_file, self.rcconf_file)
# ===========================================
# Subclass: Linux
class LinuxService(Service):
"""
This is the Linux Service manipulation class - it is currently supporting
a mixture of binaries and init scripts for controlling services started at
boot, as well as for controlling the current state.
"""
platform = 'Linux'
distribution = None
def get_service_tools(self):
paths = [ '/sbin', '/usr/sbin', '/bin', '/usr/bin' ]
binaries = [ 'service', 'chkconfig', 'update-rc.d', 'rc-service', 'rc-update', 'initctl', 'systemctl', 'start', 'stop', 'restart' ]
initpaths = [ '/etc/init.d' ]
location = dict()
for binary in binaries:
location[binary] = None
for binary in binaries:
location[binary] = self.module.get_bin_path(binary)
# Locate a tool for enable options
if location.get('chkconfig', None) and os.path.exists("/etc/init.d/%s" % self.name):
# we are using a standard SysV service
self.enable_cmd = location['chkconfig']
elif location.get('update-rc.d', None) and os.path.exists("/etc/init/%s.conf" % self.name):
# service is managed by upstart
self.enable_cmd = location['update-rc.d']
elif location.get('update-rc.d', None) and os.path.exists("/etc/init.d/%s" % self.name):
# service is managed by with SysV init scripts, but with update-rc.d
self.enable_cmd = location['update-rc.d']
elif location.get('rc-service', None) and not location.get('systemctl', None):
# service is managed by OpenRC
self.svc_cmd = location['rc-service']
self.enable_cmd = location['rc-update']
return
elif location.get('systemctl', None):
# verify service is managed by systemd
rc, out, err = self.execute_command("%s list-unit-files" % (location['systemctl']))
# adjust the service name to account for template service unit files
index = self.name.find('@')
if index == -1:
name = self.name
else:
name = self.name[:index+1]
look_for = "%s.service" % name
for line in out.splitlines():
if line.startswith(look_for):
self.enable_cmd = location['systemctl']
break
# Locate a tool for runtime service management (start, stop etc.)
if location.get('service', None) and os.path.exists("/etc/init.d/%s" % self.name):
# SysV init script
self.svc_cmd = location['service']
elif location.get('start', None) and os.path.exists("/etc/init/%s.conf" % self.name):
# upstart -- rather than being managed by one command, start/stop/restart are actual commands
self.svc_cmd = ''
else:
# still a SysV init script, but /sbin/service isn't installed
for initdir in initpaths:
initscript = "%s/%s" % (initdir,self.name)
if os.path.isfile(initscript):
self.svc_initscript = initscript
# couldn't find anything yet, assume systemd
if self.svc_cmd is None and self.svc_initscript is None:
if location.get('systemctl'):
self.svc_cmd = location['systemctl']
if self.svc_cmd is None and not self.svc_initscript:
self.module.fail_json(msg='cannot find \'service\' binary or init script for service, possible typo in service name?, aborting')
if location.get('initctl', None):
self.svc_initctl = location['initctl']
def get_service_status(self):
self.action = "status"
rc, status_stdout, status_stderr = self.service_control()
# if we have decided the service is managed by upstart, we check for some additional output...
if self.svc_initctl and self.running is None:
# check the job status by upstart response
initctl_rc, initctl_status_stdout, initctl_status_stderr = self.execute_command("%s status %s" % (self.svc_initctl, self.name))
if initctl_status_stdout.find("stop/waiting") != -1:
self.running = False
elif initctl_status_stdout.find("start/running") != -1:
self.running = True
if self.svc_cmd.endswith("rc-service") and self.running is None:
openrc_rc, openrc_status_stdout, openrc_status_stderr = self.execute_command("%s %s status" % (self.svc_cmd, self.name))
self.running = "started" in openrc_status_stdout
self.crashed = "crashed" in openrc_status_stderr
# if the job status is still not known check it by response code
# For reference, see:
# http://refspecs.linuxbase.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/iniscrptact.html
if self.running is None:
if rc in [1, 2, 3, 4, 69]:
self.running = False
elif rc == 0:
self.running = True
# if the job status is still not known check it by status output keywords
if self.running is None:
# first tranform the status output that could irritate keyword matching
cleanout = status_stdout.lower().replace(self.name.lower(), '')
if "stop" in cleanout:
self.running = False
elif "run" in cleanout and "not" in cleanout:
self.running = False
elif "run" in cleanout and "not" not in cleanout:
self.running = True
elif "start" in cleanout and "not" not in cleanout:
self.running = True
elif 'could not access pid file' in cleanout:
self.running = False
elif 'is dead and pid file exists' in cleanout:
self.running = False
elif 'dead but subsys locked' in cleanout:
self.running = False
elif 'dead but pid file exists' in cleanout:
self.running = False
# if the job status is still not known check it by special conditions
if self.running is None:
if self.name == 'iptables' and status_stdout.find("ACCEPT") != -1:
# iptables status command output is lame
# TODO: lookup if we can use a return code for this instead?
self.running = True
return self.running
def service_enable(self):
if self.enable_cmd is None:
self.module.fail_json(msg='service name not recognized')
# FIXME: we use chkconfig or systemctl
# to decide whether to run the command here but need something
# similar for upstart
if self.enable_cmd.endswith("chkconfig"):
(rc, out, err) = self.execute_command("%s --list %s" % (self.enable_cmd, self.name))
if 'chkconfig --add %s' % self.name in err:
self.execute_command("%s --add %s" % (self.enable_cmd, self.name))
(rc, out, err) = self.execute_command("%s --list %s" % (self.enable_cmd, self.name))
if not self.name in out:
self.module.fail_json(msg="unknown service name")
state = out.split()[-1]
if self.enable and ( "3:on" in out and "5:on" in out ):
return
elif not self.enable and ( "3:off" in out and "5:off" in out ):
return
if self.enable_cmd.endswith("systemctl"):
(rc, out, err) = self.execute_command("%s show %s.service" % (self.enable_cmd, self.name))
d = dict(line.split('=', 1) for line in out.splitlines())
if "UnitFileState" in d:
if self.enable and d["UnitFileState"] == "enabled":
return
elif not self.enable and d["UnitFileState"] == "disabled":
return
elif not self.enable:
return
if self.enable_cmd.endswith("rc-update"):
(rc, out, err) = self.execute_command("%s show" % self.enable_cmd)
for line in out.splitlines():
service_name, runlevels = line.split('|')
service_name = service_name.strip()
if service_name != self.name:
continue
runlevels = re.split(r'\s+', runlevels)
# service already enabled for the runlevel
if self.enable and self.runlevel in runlevels:
return
# service already disabled for the runlevel
elif not self.enable and self.runlevel not in runlevels:
return
break
else:
# service already disabled altogether
if not self.enable:
return
# we change argument depending on real binary used:
# - update-rc.d and systemctl wants enable/disable
# - chkconfig wants on/off
# - rc-update wants add/delete
# also, rc-update and systemctl needs the argument order reversed
if self.enable:
on_off = "on"
enable_disable = "enable"
add_delete = "add"
else:
on_off = "off"
enable_disable = "disable"
add_delete = "delete"
if self.enable_cmd.endswith("update-rc.d"):
args = (self.enable_cmd, self.name, enable_disable)
elif self.enable_cmd.endswith("rc-update"):
args = (self.enable_cmd, add_delete, self.name + " " + self.runlevel)
elif self.enable_cmd.endswith("systemctl"):
args = (self.enable_cmd, enable_disable, self.name + ".service")
else:
args = (self.enable_cmd, self.name, on_off)
self.changed = True
if self.module.check_mode and self.changed:
self.module.exit_json(changed=True)
return self.execute_command("%s %s %s" % args)
def service_control(self):
# Decide what command to run
svc_cmd = ''
arguments = self.arguments
if self.svc_cmd:
if not self.svc_cmd.endswith("systemctl"):
# SysV and OpenRC take the form <cmd> <name> <action>
svc_cmd = "%s %s" % (self.svc_cmd, self.name)
else:
# systemd commands take the form <cmd> <action> <name>
svc_cmd = self.svc_cmd
arguments = "%s %s" % (self.name, arguments)
elif self.svc_initscript:
# upstart
svc_cmd = "%s" % self.svc_initscript
# In OpenRC, if a service crashed, we need to reset its status to
# stopped with the zap command, before we can start it back.
if self.svc_cmd.endswith('rc-service') and self.action == 'start' and self.crashed:
self.execute_command("%s zap" % svc_cmd, daemonize=True)
if self.action is not "restart":
if svc_cmd != '':
# upstart or systemd or OpenRC
rc_state, stdout, stderr = self.execute_command("%s %s %s" % (svc_cmd, self.action, arguments), daemonize=True)
else:
# SysV
rc_state, stdout, stderr = self.execute_command("%s %s %s" % (self.action, self.name, arguments), daemonize=True)
elif self.svc_cmd.endswith('rc-service'):
# All services in OpenRC support restart.
rc_state, stdout, stderr = self.execute_command("%s %s %s" % (svc_cmd, self.action, arguments), daemonize=True)
else:
# In other systems, not all services support restart. Do it the hard way.
if svc_cmd != '':
# upstart or systemd
rc1, stdout1, stderr1 = self.execute_command("%s %s %s" % (svc_cmd, 'stop', arguments), daemonize=True)
else:
# SysV
rc1, stdout1, stderr1 = self.execute_command("%s %s %s" % ('stop', self.name, arguments), daemonize=True)
if svc_cmd != '':
# upstart or systemd
rc2, stdout2, stderr2 = self.execute_command("%s %s %s" % (svc_cmd, 'start', arguments), daemonize=True)
else:
# SysV
rc2, stdout2, stderr2 = self.execute_command("%s %s %s" % ('start', self.name, arguments), daemonize=True)
# merge return information
if rc1 != 0 and rc2 == 0:
rc_state = rc2
stdout = stdout2
stderr = stderr2
else:
rc_state = rc1 + rc2
stdout = stdout1 + stdout2
stderr = stderr1 + stderr2
return(rc_state, stdout, stderr)
# ===========================================
# Subclass: FreeBSD
class FreeBsdService(Service):
"""
This is the FreeBSD Service manipulation class - it uses the /etc/rc.conf
file for controlling services started at boot and the 'service' binary to
check status and perform direct service manipulation.
"""
platform = 'FreeBSD'
distribution = None
def get_service_tools(self):
self.svc_cmd = self.module.get_bin_path('service', True)
if not self.svc_cmd:
self.module.fail_json(msg='unable to find service binary')
def get_service_status(self):
rc, stdout, stderr = self.execute_command("%s %s %s %s" % (self.svc_cmd, self.name, 'onestatus', self.arguments))
if rc == 1:
self.running = False
elif rc == 0:
self.running = True
def service_enable(self):
if self.enable:
self.rcconf_value = "YES"
else:
self.rcconf_value = "NO"
rcfiles = [ '/etc/rc.conf','/usr/local/etc/rc.conf' ]
for rcfile in rcfiles:
if os.path.isfile(rcfile):
self.rcconf_file = rcfile
self.rcconf_key = "%s_enable" % self.name
return self.service_enable_rcconf()
def service_control(self):
if self.action is "start":
self.action = "onestart"
if self.action is "stop":
self.action = "onestop"
if self.action is "reload":
self.action = "onereload"
return self.execute_command("%s %s %s %s" % (self.svc_cmd, self.name, self.action, self.arguments))
# ===========================================
# Subclass: OpenBSD
class OpenBsdService(Service):
"""
This is the OpenBSD Service manipulation class - it uses /etc/rc.d for
service control. Enabling a service is currently not supported because the
<service>_flags variable is not boolean, you should supply a rc.conf.local
file in some other way.
"""
platform = 'OpenBSD'
distribution = None
def get_service_tools(self):
rcdir = '/etc/rc.d'
rc_script = "%s/%s" % (rcdir, self.name)
if os.path.isfile(rc_script):
self.svc_cmd = rc_script
if not self.svc_cmd:
self.module.fail_json(msg='unable to find rc.d script')
def get_service_status(self):
rc, stdout, stderr = self.execute_command("%s %s" % (self.svc_cmd, 'check'))
if rc == 1:
self.running = False
elif rc == 0:
self.running = True
def service_control(self):
return self.execute_command("%s %s" % (self.svc_cmd, self.action))
# ===========================================
# Subclass: NetBSD
class NetBsdService(Service):
"""
This is the NetBSD Service manipulation class - it uses the /etc/rc.conf
file for controlling services started at boot, check status and perform
direct service manipulation. Init scripts in /etc/rcd are used for
controlling services (start/stop) as well as for controlling the current
state.
"""
platform = 'NetBSD'
distribution = None
def get_service_tools(self):
initpaths = [ '/etc/rc.d' ] # better: $rc_directories - how to get in here? Run: sh -c '. /etc/rc.conf ; echo $rc_directories'
for initdir in initpaths:
initscript = "%s/%s" % (initdir,self.name)
if os.path.isfile(initscript):
self.svc_initscript = initscript
if not self.svc_initscript:
self.module.fail_json(msg='unable to find rc.d script')
def service_enable(self):
if self.enable:
self.rcconf_value = "YES"
else:
self.rcconf_value = "NO"
rcfiles = [ '/etc/rc.conf' ] # Overkill?
for rcfile in rcfiles:
if os.path.isfile(rcfile):
self.rcconf_file = rcfile
self.rcconf_key = "%s" % self.name
return self.service_enable_rcconf()
def get_service_status(self):
self.svc_cmd = "%s" % self.svc_initscript
rc, stdout, stderr = self.execute_command("%s %s" % (self.svc_cmd, 'onestatus'))
if rc == 1:
self.running = False
elif rc == 0:
self.running = True
def service_control(self):
if self.action is "start":
self.action = "onestart"
if self.action is "stop":
self.action = "onestop"
self.svc_cmd = "%s" % self.svc_initscript
return self.execute_command("%s %s" % (self.svc_cmd, self.action), daemonize=True)
# ===========================================
# Subclass: SunOS
class SunOSService(Service):
"""
This is the SunOS Service manipulation class - it uses the svcadm
command for controlling services, and svcs command for checking status.
It also tries to be smart about taking the service out of maintenance
state if necessary.
"""
platform = 'SunOS'
distribution = None
def get_service_tools(self):
self.svcs_cmd = self.module.get_bin_path('svcs', True)
if not self.svcs_cmd:
self.module.fail_json(msg='unable to find svcs binary')
self.svcadm_cmd = self.module.get_bin_path('svcadm', True)
if not self.svcadm_cmd:
self.module.fail_json(msg='unable to find svcadm binary')
def get_service_status(self):
status = self.get_sunos_svcs_status()
# Only 'online' is considered properly running. Everything else is off
# or has some sort of problem.
if status == 'online':
self.running = True
else:
self.running = False
def get_sunos_svcs_status(self):
rc, stdout, stderr = self.execute_command("%s %s" % (self.svcs_cmd, self.name))
if rc == 1:
if stderr:
self.module.fail_json(msg=stderr)
else:
self.module.fail_json(msg=stdout)
lines = stdout.rstrip("\n").split("\n")
status = lines[-1].split(" ")[0]
# status is one of: online, offline, degraded, disabled, maintenance, uninitialized
# see man svcs(1)
return status
def service_enable(self):
# Get current service enablement status
rc, stdout, stderr = self.execute_command("%s -l %s" % (self.svcs_cmd, self.name))
if rc != 0:
if stderr:
self.module.fail_json(msg=stderr)
else:
self.module.fail_json(msg=stdout)
enabled = False
temporary = False
# look for enabled line, which could be one of:
# enabled true (temporary)
# enabled false (temporary)
# enabled true
# enabled false
for line in stdout.split("\n"):
if line.find("enabled") == 0:
if line.find("true") != -1:
enabled = True
if line.find("temporary") != -1:
temporary = True
startup_enabled = (enabled and not temporary) or (not enabled and temporary)
if self.enable and startup_enabled:
return
elif (not self.enable) and (not startup_enabled):
return
# Mark service as started or stopped (this will have the side effect of
# actually stopping or starting the service)
if self.enable:
subcmd = "enable -rs"
else:
subcmd = "disable -s"
rc, stdout, stderr = self.execute_command("%s %s %s" % (self.svcadm_cmd, subcmd, self.name))
if rc != 0:
if stderr:
self.module.fail_json(msg=stderr)
else:
self.module.fail_json(msg=stdout)
self.changed = True
def service_control(self):
status = self.get_sunos_svcs_status()
# if starting or reloading, clear maintenace states
if self.action in ['start', 'reload', 'restart'] and status in ['maintenance', 'degraded']:
rc, stdout, stderr = self.execute_command("%s clear %s" % (self.svcadm_cmd, self.name))
if rc != 0:
return rc, stdout, stderr
status = self.get_sunos_svcs_status()
if status in ['maintenance', 'degraded']:
self.module.fail_json(msg="Failed to bring service out of %s status." % status)
if self.action == 'start':
subcmd = "enable -rst"
elif self.action == 'stop':
subcmd = "disable -st"
elif self.action == 'reload':
subcmd = "refresh"
elif self.action == 'restart' and status == 'online':
subcmd = "restart"
elif self.action == 'restart' and status != 'online':
subcmd = "enable -rst"
return self.execute_command("%s %s %s" % (self.svcadm_cmd, subcmd, self.name))
# ===========================================
# Subclass: AIX
class AIX(Service):
"""
This is the AIX Service (SRC) manipulation class - it uses lssrc, startsrc, stopsrc
and refresh for service control. Enabling a service is currently not supported.
Would require to add an entry in the /etc/inittab file (mkitab, chitab and rmitab
commands)
"""
platform = 'AIX'
distribution = None
def get_service_tools(self):
self.lssrc_cmd = self.module.get_bin_path('lssrc', True)
if not self.lssrc_cmd:
self.module.fail_json(msg='unable to find lssrc binary')
self.startsrc_cmd = self.module.get_bin_path('startsrc', True)
if not self.startsrc_cmd:
self.module.fail_json(msg='unable to find startsrc binary')
self.stopsrc_cmd = self.module.get_bin_path('stopsrc', True)
if not self.stopsrc_cmd:
self.module.fail_json(msg='unable to find stopsrc binary')
self.refresh_cmd = self.module.get_bin_path('refresh', True)
if not self.refresh_cmd:
self.module.fail_json(msg='unable to find refresh binary')
def get_service_status(self):
status = self.get_aix_src_status()
# Only 'active' is considered properly running. Everything else is off
# or has some sort of problem.
if status == 'active':
self.running = True
else:
self.running = False
def get_aix_src_status(self):
rc, stdout, stderr = self.execute_command("%s -s %s" % (self.lssrc_cmd, self.name))
if rc == 1:
if stderr:
self.module.fail_json(msg=stderr)
else:
self.module.fail_json(msg=stdout)
lines = stdout.rstrip("\n").split("\n")
status = lines[-1].split(" ")[-1]
# status is one of: active, inoperative
return status
def service_control(self):
if self.action == 'start':
srccmd = self.startsrc_cmd
elif self.action == 'stop':
srccmd = self.stopsrc_cmd
elif self.action == 'reload':
srccmd = self.refresh_cmd
elif self.action == 'restart':
self.execute_command("%s -s %s" % (self.stopsrc_cmd, self.name))
srccmd = self.startsrc_cmd
if self.arguments and self.action == 'start':
return self.execute_command("%s -a \"%s\" -s %s" % (srccmd, self.arguments, self.name))
else:
return self.execute_command("%s -s %s" % (srccmd, self.name))
# ===========================================
# Main control flow
def main():
module = AnsibleModule(
argument_spec = dict(
name = dict(required=True),
state = dict(choices=['running', 'started', 'stopped', 'restarted', 'reloaded']),
pattern = dict(required=False, default=None),
enabled = dict(choices=BOOLEANS, type='bool'),
runlevel = dict(required=False, default='default'),
arguments = dict(aliases=['args'], default=''),
),
supports_check_mode=True
)
if module.params['state'] is None and module.params['enabled'] is None:
module.fail_json(msg="Neither 'state' nor 'enabled' set")
service = Service(module)
if service.syslogging:
syslog.openlog('ansible-%s' % os.path.basename(__file__))
syslog.syslog(syslog.LOG_NOTICE, 'Service instantiated - platform %s' % service.platform)
if service.distribution:
syslog.syslog(syslog.LOG_NOTICE, 'Service instantiated - distribution %s' % service.distribution)
rc = 0
out = ''
err = ''
result = {}
result['name'] = service.name
# Find service management tools
service.get_service_tools()
# Enable/disable service startup at boot if requested
if service.module.params['enabled'] is not None:
# FIXME: ideally this should detect if we need to toggle the enablement state, though
# it's unlikely the changed handler would need to fire in this case so it's a minor thing.
service.service_enable()
result['enabled'] = service.enable
if module.params['state'] is None:
# Not changing the running state, so bail out now.
result['changed'] = service.changed
module.exit_json(**result)
result['state'] = service.state
# Collect service status
if service.pattern:
service.check_ps()
else:
service.get_service_status()
# Calculate if request will change service state
service.check_service_changed()
# Modify service state if necessary
(rc, out, err) = service.modify_service_state()
if rc != 0:
if err and err.find("is already") != -1:
# upstart got confused, one such possibility is MySQL on Ubuntu 12.04
# where status may report it has no start/stop links and we could
# not get accurate status
pass
else:
if err:
module.fail_json(msg=err)
else:
module.fail_json(msg=out)
result['changed'] = service.changed
if service.module.params['enabled'] is not None:
result['enabled'] = service.module.params['enabled']
if not service.module.params['state']:
status = service.get_service_status()
if status is None:
result['state'] = 'absent'
elif status is False:
result['state'] = 'started'
else:
result['state'] = 'stopped'
else:
# as we may have just bounced the service the service command may not
# report accurate state at this moment so just show what we ran
if service.module.params['state'] in ['started','restarted','running']:
result['state'] = 'started'
else:
result['state'] = 'stopped'
module.exit_json(**result)
# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
main()