This standardizes the apt_key module some
* improves error handling and reporting * uses run_command to reduce code * fails quicker on errors as opposed to return codes and tracebacks * can now also specify the key as data versus needing to wget it from a file
This commit is contained in:
Michael DeHaan
parent
0bfec51a04
commit
4d8f3b0924
2 changed files with 82 additions and 103 deletions
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@ -677,7 +677,7 @@ class AnsibleModule(object):
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self.set_context_if_different(src, context, False)
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os.rename(src, dest)
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def run_command(self, args, check_rc=False, close_fds=False, executable=None):
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def run_command(self, args, check_rc=False, close_fds=False, executable=None, data=None):
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'''
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Execute a command, returns rc, stdout, and stderr.
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args is the command to run
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@ -700,12 +700,20 @@ class AnsibleModule(object):
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self.fail_json(rc=257, cmd=args, msg=msg)
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rc = 0
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msg = None
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st_in = None
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if data:
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st_in = subprocess.PIPE
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try:
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cmd = subprocess.Popen(args,
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executable=executable,
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shell=shell,
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close_fds=close_fds,
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stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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stdin=st_in,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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if data:
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cmd.stdin.write(data)
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cmd.stdin.write('\\n')
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out, err = cmd.communicate()
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rc = cmd.returncode
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except (OSError, IOError), e:
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159
library/apt_key
159
library/apt_key
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@ -22,7 +22,7 @@
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DOCUMENTATION = '''
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---
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module: apt_key
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author: Jayson Vantuyl
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author: Jayson Vantuyl & others
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version_added: 1.0
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short_description: Add or remove an apt key
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description:
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@ -59,145 +59,116 @@ examples:
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description: Remove a Apt specific signing key
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'''
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# FIXME: standardize into module_common
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from urllib2 import urlopen, URLError
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from traceback import format_exc
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from subprocess import Popen, PIPE, call
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from re import compile as re_compile
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# FIXME: standardize into module_common
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from distutils.spawn import find_executable
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from os import environ
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from sys import exc_info
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import traceback
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match_key = re_compile("^gpg:.*key ([0-9a-fA-F]+):.*$")
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REQUIRED_EXECUTABLES=['gpg', 'grep', 'apt-key']
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def find_missing_binaries():
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return [missing for missing in REQUIRED_EXECUTABLES if not find_executable(missing)]
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def check_missing_binaries(module):
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missing = [e for e in REQUIRED_EXECUTABLES if not find_executable(e)]
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if len(missing):
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module.fail_json(msg="binaries are missing", names=all)
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def all_keys(module):
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(rc, out, err) = module.run_command("apt-key list")
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results = []
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lines = out.split('\n')
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for line in lines:
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if line.startswith("pub"):
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tokens = line.split()
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code = tokens[1]
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(len_type, real_code) = code.split("/")
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results.append(real_code)
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return results
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def get_key_ids(key_data):
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p = Popen("gpg --list-only --import -", shell=True, stdin=PIPE, stdout=PIPE, stderr=PIPE)
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(stdo, stde) = p.communicate(key_data)
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def key_present(module, key_id):
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(rc, out, err) = module.run_command("apt-key list | 2>&1 grep -q %s" % key_id)
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return rc == 0
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if p.returncode > 0:
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raise Exception("error running GPG to retrieve keys")
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output = stdo + stde
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for line in output.split('\n'):
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match = match_key.match(line)
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if match:
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yield match.group(1)
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def key_present(key_id):
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return call("apt-key list | 2>&1 grep -q %s" % key_id, shell=True) == 0
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def download_key(url):
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def download_key(module, url):
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# FIXME: move get_url code to common, allow for in-memory D/L, support proxies
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# and reuse here
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if url is None:
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raise Exception("Needed URL but none specified")
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module.fail_json(msg="needed a URL but was not specified")
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try:
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connection = urlopen(url)
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if connection is None:
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raise Exception("error connecting to download key from %r" % url)
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return connection.read()
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module.fail_json("error connecting to download key from url")
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data = connection.read()
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return data
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except:
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module.fail_json(msg="error getting key id from url", traceback=format_exc())
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def add_key(key):
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p = Popen("apt-key add -", shell=True, stdin=PIPE, stdout=PIPE, stderr=PIPE)
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(_, _) = p.communicate(key)
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return p.returncode == 0
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def add_key(module, key):
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cmd = "apt-key add -"
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(rc, out, err) = module.run_command(cmd, data=key, check_rc=True)
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return True
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def remove_key(key_id):
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return call('apt-key del %s' % key_id, shell=True) == 0
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def return_values(tb=False):
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if tb:
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return {'exception': format_exc()}
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else:
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return {}
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# FIXME: use module.run_command, fail at point of error and don't discard useful stdin/stdout
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cmd = 'apt-key del %s'
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(rc, out, err) = module.run_command(cmd, check_rc=True)
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return True
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def main():
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module = AnsibleModule(
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argument_spec=dict(
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id=dict(required=False, default=None),
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url=dict(required=False),
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data=dict(required=False),
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key=dict(required=False),
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state=dict(required=False, choices=['present', 'absent'], default='present')
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)
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),
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)
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expected_key_id = module.params['id']
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key_id = module.params['id']
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url = module.params['url']
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data = module.params['data']
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state = module.params['state']
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changed = False
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missing = find_missing_binaries()
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# FIXME: I think we have a common facility for this, if not, want
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check_missing_binaries(module)
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if missing:
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module.fail_json(msg="can't find needed binaries to run", missing=missing,
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**return_values())
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keys = all_keys(module)
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if state == 'present':
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if expected_key_id and key_present(expected_key_id):
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# key is present, nothing to do
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pass
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if key_id and key_id in keys:
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module.exit_json(changed=False)
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else:
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# download key
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try:
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key = download_key(url)
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(key_id,) = tuple(get_key_ids(key)) # TODO: support multiple key ids?
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except Exception:
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module.fail_json(
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msg="error getting key id from url",
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**return_values(True)
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)
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# sanity check downloaded key
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if expected_key_id and key_id != expected_key_id:
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module.fail_json(
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msg="expected key id %s, got key id %s" % (expected_key_id, key_id),
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**return_values()
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)
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# actually add key
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if key_present(key_id):
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if not data:
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data = download_key(module, url)
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if key_id and key_id in keys:
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module.exit_json(changed=False)
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else:
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add_key(module, data)
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changed=False
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elif add_key(key):
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keys2 = all_keys(module)
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if len(keys) != len(keys2):
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changed=True
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else:
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module.fail_json(
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msg="failed to add key id %s" % key_id,
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**return_values()
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)
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if key_id and not key_id in keys2:
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module.fail_json(msg="key does not seem to have been added", id=key_id)
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module.exit_json(changed=changed)
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elif state == 'absent':
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# optionally download the key and get the id
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if not expected_key_id:
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try:
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key = download_key(url)
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(key_id,) = tuple(get_key_ids(key)) # TODO: support multiple key ids?
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except Exception:
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module.fail_json(
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msg="error getting key id from url",
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**return_values(True)
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)
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else:
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key_id = expected_key_id
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# actually remove key
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if key_present(key_id):
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if not key_id:
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module.fail_json(msg="key is required")
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if key_id in keys:
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if remove_key(key_id):
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changed=True
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else:
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# FIXME: module.fail_json or exit-json immediately at point of failure
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module.fail_json(msg="error removing key_id", **return_values(True))
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else:
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module.fail_json(
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msg="unexpected state: %s" % state,
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**return_values()
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)
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module.exit_json(changed=changed, **return_values())
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