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Merge pull request #4888 from jarv/jarv/wait_for

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Adding more wait conditions to the wait_for module
This commit is contained in:
jctanner 2013-11-14 12:52:00 -08:00
commit f6c97909cc
1 changed files with 86 additions and 30 deletions
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90
utilities/wait_for
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@ -22,16 +22,20 @@ import socket
import datetime
import time
import sys
import re
DOCUMENTATION = '''
---
module: wait_for
short_description: Waits for a given port to become accessible on a server.
short_description: Waits for a condition before continuing.
description:
- This is useful for when services are not immediately available after
their init scripts return - which is true of certain Java application
servers. It is also useful when starting guests with the M(virt) module and
needing to pause until they are ready.
- Waiting for a port to become available is useful for when services
are not immediately available after their init scripts return -
which is true of certain Java application servers. It is also
useful when starting guests with the M(virt) module and
needing to pause until they are ready. This module can
also be used to wait for a file to be available on the filesystem
or with a regex match a string to be present in a file.
version_added: "0.7"
options:
host:
@ -53,21 +57,41 @@ options:
port:
description:
- port number to poll
required: true
required: false
state:
description:
- either C(started), or C(stopped) depending on whether the module should
poll for the port being open or closed.
choices: [ "started", "stopped" ]
- either C(present), C(started), or C(stopped)
- When checking a port C(started) will ensure the port is open, C(stopped) will check that it is closed
- 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
choices: [ "present", "started", "stopped" ]
default: "started"
path:
version_added: "1.4"
required: false
description:
- path to a file on the filesytem that must exist before continuing
search_regex:
version_added: "1.4"
required: false
description:
- with the path option can be used match a string in the file that must match before continuing. Defaults to a multiline regex.
notes: []
requirements: []
author: Jeroen Hoekx
author: Jeroen Hoekx, John Jarvis
'''
EXAMPLES = '''
# wait 300 seconds for port 8000 to become open on the host, don't start checking for 10 seconds
- wait_for: port=8000 delay=10"
# wait until the file /tmp/foo is present before continuing
- wait_for: path=/tmp/foo
# wait until the string "completed" is in the file /tmp/foo before continuing
- wait_for: path=/tmp/foo search_regex=completed
'''
def main():
@ -78,8 +102,10 @@ def main():
timeout=dict(default=300),
connect_timeout=dict(default=5),
delay=dict(default=0),
port=dict(required=True),
state=dict(default='started', choices=['started', 'stopped']),
port=dict(default=None),
path=dict(default=None),
search_regex=dict(default=None),
state=dict(default='started', choices=['started', 'stopped', 'present']),
),
)
@ -89,8 +115,18 @@ def main():
timeout = int(params['timeout'])
connect_timeout = int(params['connect_timeout'])
delay = int(params['delay'])
if params['port']:
port = int(params['port'])
else:
port = None
state = params['state']
path = params['path']
search_regex = params['search_regex']
if port and path:
module.fail_json(msg="port and path parameter can not both be passed to wait_for")
if path and state == 'stopped':
module.fail_json(msg="state=stopped should only be used for checking a port in the wait_for module")
start = datetime.datetime.now()
@ -98,7 +134,7 @@ def main():
time.sleep(delay)
if state == 'stopped':
### first wait for the host to go down
### first wait for the stop condition
end = start + datetime.timedelta(seconds=timeout)
while datetime.datetime.now() < end:
@ -115,11 +151,24 @@ def main():
elapsed = datetime.datetime.now() - start
module.fail_json(msg="Timeout when waiting for %s:%s to stop." % (host, port), elapsed=elapsed.seconds)
elif state == 'started':
### wait for the host to come up
elif state in ['started', 'present']:
### wait for start condition
end = start + datetime.timedelta(seconds=timeout)
while datetime.datetime.now() < end:
if path:
try:
with open(path) as f:
if search_regex:
if re.search(search_regex, f.read(), re.MULTILINE):
break
else:
time.sleep(1)
else:
break
except IOError:
time.sleep(1)
pass
elif port:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.settimeout(connect_timeout)
try:
@ -132,10 +181,17 @@ def main():
pass
else:
elapsed = datetime.datetime.now() - start
if port:
module.fail_json(msg="Timeout when waiting for %s:%s" % (host, port), elapsed=elapsed.seconds)
elif path:
if search_regex:
module.fail_json(msg="Timeout when waiting for search string %s in %s" % (search_regex, path), elapsed=elapsed.seconds)
else:
module.fail_json(msg="Timeout when waiting for file %s" % (path), elapsed=elapsed.seconds)
elapsed = datetime.datetime.now() - start
module.exit_json(state=state, port=port, elapsed=elapsed.seconds)
module.exit_json(state=state, port=port, search_regex=search_regex, path=path, elapsed=elapsed.seconds)
# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>