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252 lines
9.0 KiB
Python
252 lines
9.0 KiB
Python
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# (c) 2012, Jeroen Hoekx <jeroen@hoekx.be>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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import socket
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import datetime
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import time
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import sys
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import re
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DOCUMENTATION = '''
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---
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module: wait_for
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short_description: Waits for a condition before continuing.
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description:
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- Waiting for a port to become available is useful for when services
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are not immediately available after their init scripts return -
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which is true of certain Java application servers. It is also
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useful when starting guests with the M(virt) module and
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needing to pause until they are ready.
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- This module can also be used to wait for a regex match a string to be present in a file.
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- In 1.6 and later, this module can
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also be used to wait for a file to be available or absent on the
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filesystem.
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version_added: "0.7"
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options:
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host:
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description:
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- hostname or IP address to wait for
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required: false
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default: "127.0.0.1"
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aliases: []
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timeout:
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description:
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- maximum number of seconds to wait for
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required: false
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default: 300
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delay:
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description:
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- number of seconds to wait before starting to poll
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required: false
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default: 0
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port:
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description:
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- port number to poll
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required: false
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state:
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description:
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- either C(present), C(started), or C(stopped), C(absent)
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- When checking a port C(started) will ensure the port is open, C(stopped) will check that it is closed
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- When checking for a file or a search string C(present) or C(started) will ensure that the file or string is present before continuing, C(absent) will check that file is absent or removed
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choices: [ "present", "started", "stopped", "absent" ]
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default: "started"
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path:
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version_added: "1.4"
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required: false
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description:
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- path to a file on the filesytem that must exist before continuing
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search_regex:
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version_added: "1.4"
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required: false
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description:
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- Can be used to match a string in either a file or a socket connection. Defaults to a multiline regex.
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notes:
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- The ability to use search_regex with a port connection was added in 1.7.
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requirements: []
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author: Jeroen Hoekx, John Jarvis, Andrii Radyk
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'''
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EXAMPLES = '''
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# wait 300 seconds for port 8000 to become open on the host, don't start checking for 10 seconds
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- wait_for: port=8000 delay=10
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# wait until the file /tmp/foo is present before continuing
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- wait_for: path=/tmp/foo
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# wait until the string "completed" is in the file /tmp/foo before continuing
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- wait_for: path=/tmp/foo search_regex=completed
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# wait until the lock file is removed
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- wait_for: path=/var/lock/file.lock state=absent
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# wait until the process is finished and pid was destroyed
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- wait_for: path=/proc/3466/status state=absent
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# Wait 300 seconds for port 22 to become open and contain "OpenSSH", don't start checking for 10 seconds
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- local_action: wait_for port=22 host="{{ inventory_hostname }}" search_regex=OpenSSH delay=10
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'''
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def main():
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module = AnsibleModule(
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argument_spec = dict(
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host=dict(default='127.0.0.1'),
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timeout=dict(default=300),
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connect_timeout=dict(default=5),
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delay=dict(default=0),
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port=dict(default=None),
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path=dict(default=None),
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search_regex=dict(default=None),
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state=dict(default='started', choices=['started', 'stopped', 'present', 'absent']),
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),
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)
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params = module.params
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host = params['host']
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timeout = int(params['timeout'])
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connect_timeout = int(params['connect_timeout'])
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delay = int(params['delay'])
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if params['port']:
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port = int(params['port'])
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else:
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port = None
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state = params['state']
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path = params['path']
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search_regex = params['search_regex']
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if port and path:
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module.fail_json(msg="port and path parameter can not both be passed to wait_for")
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if path and state == 'stopped':
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module.fail_json(msg="state=stopped should only be used for checking a port in the wait_for module")
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start = datetime.datetime.now()
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if delay:
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time.sleep(delay)
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if state in [ 'stopped', 'absent' ]:
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### first wait for the stop condition
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end = start + datetime.timedelta(seconds=timeout)
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while datetime.datetime.now() < end:
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if path:
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try:
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f = open(path)
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f.close()
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time.sleep(1)
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pass
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except IOError:
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break
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elif port:
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.settimeout(connect_timeout)
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try:
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s.connect( (host, port) )
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s.shutdown(socket.SHUT_RDWR)
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s.close()
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time.sleep(1)
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except:
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break
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else:
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elapsed = datetime.datetime.now() - start
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if port:
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module.fail_json(msg="Timeout when waiting for %s:%s to stop." % (host, port), elapsed=elapsed.seconds)
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elif path:
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module.fail_json(msg="Timeout when waiting for %s to be absent." % (path), elapsed=elapsed.seconds)
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elif state in ['started', 'present']:
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### wait for start condition
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end = start + datetime.timedelta(seconds=timeout)
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while datetime.datetime.now() < end:
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if path:
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try:
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os.stat(path)
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if search_regex:
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try:
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f = open(path)
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try:
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if re.search(search_regex, f.read(), re.MULTILINE):
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break
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else:
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time.sleep(1)
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finally:
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f.close()
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except IOError:
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time.sleep(1)
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pass
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else:
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break
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except OSError, e:
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# File not present
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if e.errno == 2:
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time.sleep(1)
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else:
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elapsed = datetime.datetime.now() - start
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module.fail_json(msg="Failed to stat %s, %s" % (path, e.strerror), elapsed=elapsed.seconds)
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elif port:
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.settimeout(connect_timeout)
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try:
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s.connect( (host, port) )
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if search_regex:
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data = ''
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matched = False
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while 1:
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data += s.recv(1024)
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if not data:
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break
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elif re.search(search_regex, data, re.MULTILINE):
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matched = True
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break
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if matched:
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s.shutdown(socket.SHUT_RDWR)
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s.close()
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break
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else:
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s.shutdown(socket.SHUT_RDWR)
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s.close()
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break
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except:
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time.sleep(1)
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pass
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else:
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elapsed = datetime.datetime.now() - start
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if port:
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if search_regex:
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module.fail_json(msg="Timeout when waiting for search string %s in %s:%s" % (search_regex, host, port), elapsed=elapsed.seconds)
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else:
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module.fail_json(msg="Timeout when waiting for %s:%s" % (host, port), elapsed=elapsed.seconds)
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elif path:
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if search_regex:
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module.fail_json(msg="Timeout when waiting for search string %s in %s" % (search_regex, path), elapsed=elapsed.seconds)
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else:
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module.fail_json(msg="Timeout when waiting for file %s" % (path), elapsed=elapsed.seconds)
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elapsed = datetime.datetime.now() - start
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module.exit_json(state=state, port=port, search_regex=search_regex, path=path, elapsed=elapsed.seconds)
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# import module snippets
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from ansible.module_utils.basic import *
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main()
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