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Refactored a few things to be more inline with the Ansible way. Passing testing.

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This commit is contained in:
Richard C Isaacson 2014-01-15 21:24:55 -06:00
parent 8388ce626f
commit 7686204b43
1 changed files with 77 additions and 85 deletions
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162
library/system/at
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@ -25,13 +25,8 @@ short_description: Schedule the execution of a command or scripts via the at com
description:
- Use this module to schedule a command or script to run once in the future.
- All jobs are executed in the a queue.
version_added: "0.0"
version_added: "1.5"
options:
user:
description:
- The user to execute the at command as.
required: false
default: null
command:
description:
- A command to be executed in the future.
@ -42,22 +37,26 @@ options:
- An existing script to be executed in the future.
required: false
default: null
unit_count:
count:
description:
- The count of units in the future to execute the command or script.
required: true
unit_type:
units:
description:
- The type of units in the future to execute the command or script.
required: true
choices: ["minutes", "hours", "days", "weeks"]
action:
state:
description:
- The action to take for the job defaulting to add. Unique will verify that there is only one entry in the queue.
- Delete will remove all existing queued jobs.
required: true
choices: ["add", "delete", "unique"]
default: add
- The state dictates if the command or script_file should be evaluated as present(added) or absent(deleted).
required: false
choices: ["present", "absent"]
default: "present"
unique:
description:
- If a matching job is present a new job will not be added.
required: false
default: false
requirements:
- at
author: Richard Isaacson
@ -65,33 +64,41 @@ author: Richard Isaacson
EXAMPLES = '''
# Schedule a command to execute in 20 minutes as root.
- at: command="ls -d / > /dev/null" unit_count=20 unit_type="minutes"
# Schedule a script to execute in 1 hour as the neo user.
- at: script_file="/some/script.sh" user="neo" unit_count=1 unit_type="hours"
- at: command="ls -d / > /dev/null" count=20 units="minutes"
# Match a command to an existing job and delete the job.
- at: command="ls -d / > /dev/null" action="delete"
- at: command="ls -d / > /dev/null" state="absent"
# Schedule a command to execute in 20 minutes making sure it is unique in the queue.
- at: command="ls -d / > /dev/null" action="unique" unit_count=20 unit_type="minutes"
- at: command="ls -d / > /dev/null" unique=true count=20 units="minutes"
'''
import os
import tempfile
def add_job(module, result, at_cmd, count, units, command, script_file):
at_command = "%s now + %s %s -f %s" % (at_cmd, count, units, script_file)
rc, out, err = module.run_command(at_command, check_rc=True)
if command:
os.unlink(script_file)
result['changed'] = True
def matching_jobs(module, at_cmd, script_file, user=None):
def delete_job(module, result, at_cmd, command, script_file):
for matching_job in matching_jobs(module, at_cmd, script_file):
at_command = "%s -d %s" % (at_cmd, matching_job)
rc, out, err = module.run_command(at_command, check_rc=True)
result['changed'] = True
if command:
os.unlink(script_file)
module.exit_json(**result)
def matching_jobs(module, at_cmd, script_file):
matching_jobs = []
atq_cmd = module.get_bin_path('atq', True)
# Get list of job numbers for the user.
atq_command = "%s" % (atq_cmd)
if user:
atq_command = "su '%s' -c '%s'" % (user, atq_command)
rc, out, err = module.run_command(atq_command)
if rc != 0:
module.fail_json(msg=err)
rc, out, err = module.run_command(atq_command, check_rc=True)
current_jobs = out.splitlines()
if len(current_jobs) == 0:
return matching_jobs
@ -104,100 +111,85 @@ def matching_jobs(module, at_cmd, script_file, user=None):
for current_job in current_jobs:
split_current_job = current_job.split()
at_command = "%s -c %s" % (at_cmd, split_current_job[0])
if user:
at_command = "su '%s' -c '%s'" % (user, at_command)
rc, out, err = module.run_command(at_command)
if rc != 0:
module.fail_json(msg=err)
rc, out, err = module.run_command(at_command, check_rc=True)
if script_file_string in out:
matching_jobs.append(split_current_job[0])
# Return the list.
return matching_jobs
def create_tempfile(command):
filed, script_file = tempfile.mkstemp(prefix='at')
fileh = os.fdopen(filed, 'w')
fileh.write(command)
fileh.close()
return script_file
#================================================
def main():
module = AnsibleModule(
argument_spec = dict(
user=dict(required=False),
command=dict(required=False),
script_file=dict(required=False),
unit_count=dict(required=False,
command=dict(required=False,
type='str'),
script_file=dict(required=False,
type='str'),
count=dict(required=False,
type='int'),
unit_type=dict(required=False,
units=dict(required=False,
default=None,
choices=["minutes", "hours", "days", "weeks"],
type="str"),
action=dict(required=False,
default="add",
choices=["add", "delete", "unique"],
type="str")
choices=['minutes', 'hours', 'days', 'weeks'],
type='str'),
state=dict(required=False,
default='present',
choices=['present', 'absent'],
type='str'),
unique=dict(required=False,
default=False,
type='bool')
),
supports_check_mode = False,
mutually_exclusive = [['command', 'script_file']],
required_one_of = [['command', 'script_file']],
supports_check_mode = False
)
at_cmd = module.get_bin_path('at', True)
user = module.params['user']
command = module.params['command']
script_file = module.params['script_file']
unit_count = module.params['unit_count']
unit_type = module.params['unit_type']
action = module.params['action']
count = module.params['count']
units = module.params['units']
state = module.params['state']
unique = module.params['unique']
if ((action == 'add') and (not unit_count or not unit_type)):
module.fail_json(msg="add action requires unit_count and unit_type")
if (not command) and (not script_file):
module.fail_json(msg="command or script_file not specified")
if command and script_file:
module.fail_json(msg="command and script_file are mutually exclusive")
if ((state == 'present') and (not count or not units)):
module.fail_json(msg="present state requires count and units")
result = {}
result['action'] = action
result['state'] = state
result['changed'] = False
# If command transform it into a script_file
if command:
filed, script_file = tempfile.mkstemp(prefix='at')
fileh = os.fdopen(filed, 'w')
fileh.write(command)
fileh.close()
script_file = create_tempfile(command)
# if delete then return
if action == 'delete':
for matching_job in matching_jobs(module, at_cmd, script_file, user):
at_command = "%s -d %s" % (at_cmd, matching_job)
if user:
at_command = "su '%s' -c '%s'" % (user, at_ccommand)
rc, out, err = module.run_command(at_command)
if rc != 0:
module.fail_json(msg=err)
result['changed'] = True
module.exit_json(**result)
# if absent remove existing and return
if state == 'absent':
delete_job(module, result, at_cmd, command, script_file)
# if unique if existing return unchanged
if action == 'unique':
if len(matching_jobs(module, at_cmd, script_file, user)) != 0:
if unique:
if len(matching_jobs(module, at_cmd, script_file)) != 0:
if command:
os.unlink(script_file)
module.exit_json(**result)
result['script_file'] = script_file
result['unit_count'] = unit_count
result['unit_type'] = unit_type
result['count'] = count
result['units'] = units
at_command = "%s now + %s %s -f %s" % (at_cmd, unit_count, unit_type, script_file)
if user:
# We expect that if this is an installed the permissions are already correct for the user to execute it.
at_command = "su '%s' -c '%s'" % (user, at_command)
rc, out, err = module.run_command(at_command)
if rc != 0:
module.fail_json(msg=err)
if command:
os.unlink(script_file)
result['changed'] = True
add_job(module, result, at_cmd, count, units, command, script_file)
module.exit_json(**result)