From 826a756e6195a3ea82a59a3cb587ab0e077160b6 Mon Sep 17 00:00:00 2001 From: Silviu Dicu Date: Thu, 24 Jan 2013 19:14:32 -0500 Subject: [PATCH] ec2 facts module - updated as per comments --- ec2_facts | 80 ++++++++++++++++++++++++++++++++++++++----------------- 1 file changed, 55 insertions(+), 25 deletions(-) diff --git a/ec2_facts b/ec2_facts index c9f85dd04a3..40984f44c7d 100644 --- a/ec2_facts +++ b/ec2_facts @@ -24,32 +24,36 @@ short_description: Gathers facts about remote hosts within ec2 (aws) options: {} description: - This module fetches data from the metadata servers in ec2 (aws). + Eucalyptus cloud provides a similar service and this module should + work this cloud provider as well. notes: - Parameters to filter on ec2_facts may be added later. - Some of the facts are not returned ( like mapping of the devices - but - may be added later). examples: - code: ansible all -m ec2_facts --tree /tmp/facts description: Obtain facts from ec2 metatdata servers. You will need to run an instance within ec2. -author: Silviu Dicu + +author: Silviu Dicu: silviudicu@gmail.com ''' import urllib2 import socket +import re socket.setdefaulttimeout(5) class Ec2Metadata(object): - ec2_metadata_url = 'http://169.254.169.254/latest/meta-data/' - ec2_sshdata_url = 'http://169.254.169.254/latest/meta-data/public-keys/0/openssh-key' - ec2_userdata_url = 'http://169.254.169.254/latest/user-data/' + ec2_metadata_uri = 'http://169.254.169.254/latest/meta-data/' + ec2_sshdata_uri = 'http://169.254.169.254/latest/meta-data/public-keys/0/openssh-key' + ec2_userdata_uri = 'http://169.254.169.254/latest/user-data/' - def __init__(self, ec2_metadata_url=None, ec2_sshdata_url=None, ec2_userdata_url=None): - self.url_meta = ec2_metadata_url or self.ec2_metadata_url - self.url_user = ec2_userdata_url or self.ec2_userdata_url - self.url_ssh = ec2_sshdata_url or self.ec2_sshdata_url + def __init__(self, ec2_metadata_uri=None, ec2_sshdata_uri=None, ec2_userdata_uri=None): + self.uri_meta = ec2_metadata_uri or self.ec2_metadata_uri + self.uri_user = ec2_userdata_uri or self.ec2_userdata_uri + self.uri_ssh = ec2_sshdata_uri or self.ec2_sshdata_uri + self._data = {} + self._prefix = 'ansible_ec2_%s' def _fetch(self, url): try: @@ -59,22 +63,48 @@ class Ec2Metadata(object): except urllib2.URLError: return - def run(self, field=None): - data = {} - raw_fields = self._fetch(self.url_meta) - if not raw_fields: - return data - fields = raw_fields.split('\n') - for field in fields: - if field.endswith('/'): continue # deal with this later - field_data = self._fetch(self.url_meta + field) - if field == 'security-groups': - sg_fields = ",".join(field_data.split('\n')) - data['ansible_ec2_%s' % field] = sg_fields + def _mangle_fields(self, fields, uri, filter_patterns=['public-keys-0']): + new_fields = {} + for key, value in fields.iteritems(): + split_fields = key[len(uri):].split('/') + if len(split_fields) > 1 and split_fields[1]: + new_key = "-".join(split_fields) + new_fields[self._prefix % new_key] = value else: - data['ansible_ec2_%s' % field] = field_data - data['ansible_ec2_%s' % 'user-data'] = self._fetch(self.url_user) - data['ensible_ec2_%s' % 'public-keys'] = self._fetch(self.url_ssh) + new_key = "".join(split_fields) + new_fields[self._prefix % new_key] = value + for pattern in filter_patterns: + for key in new_fields.keys(): + match = re.search(pattern, key) + if match: new_fields.pop(key) + return new_fields + + def fetch(self, uri, recurse=True): + raw_subfields = self._fetch(uri) + if not raw_subfields: + return + subfields = raw_subfields.split('\n') + for field in subfields: + if field.endswith('/') and recurse: + self.fetch(uri + field) + if uri.endswith('/'): + new_uri = uri + field + else: + new_uri = uri + '/' + field + if new_uri not in self._data and not new_uri.endswith('/'): + content = self._fetch(new_uri) + if field == 'security-groups': + sg_fields = ",".join(content.split('\n')) + self._data['%s' % (new_uri)] = sg_fields + else: + self._data['%s' % (new_uri)] = content + + def run(self): + self.fetch(self.uri_meta) # populate _data + data = self._mangle_fields(self._data, + self.uri_meta) + data[self._prefix % 'user-data'] = self._fetch(self.uri_user) + data[self._prefix % 'public-key'] = self._fetch(self.uri_ssh) return data