365 lines
13 KiB
Python
365 lines
13 KiB
Python
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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DOCUMENTATION = '''
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---
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module: ec2_group
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version_added: "1.3"
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short_description: maintain an ec2 VPC security group.
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description:
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- maintains ec2 security groups. This module has a dependency on python-boto >= 2.5
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options:
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name:
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description:
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- Name of the security group.
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required: true
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description:
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description:
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- Description of the security group.
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required: true
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vpc_id:
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description:
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- ID of the VPC to create the group in.
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required: false
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rules:
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description:
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- List of firewall inbound rules to enforce in this group (see example).
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required: false
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rules_egress:
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description:
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- List of firewall outbound rules to enforce in this group (see example).
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required: false
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version_added: "1.6"
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region:
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description:
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- the EC2 region to use
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required: false
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default: null
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aliases: []
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state:
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version_added: "1.4"
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description:
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- Create or delete a security group
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required: false
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default: 'present'
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choices: [ "present", "absent" ]
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aliases: []
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extends_documentation_fragment: aws
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notes:
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- If a rule declares a group_name and that group doesn't exist, it will be
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automatically created. In that case, group_desc should be provided as well.
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The module will refuse to create a depended-on group without a description.
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'''
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EXAMPLES = '''
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- name: example ec2 group
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local_action:
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module: ec2_group
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name: example
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description: an example EC2 group
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vpc_id: 12345
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region: eu-west-1a
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aws_secret_key: SECRET
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aws_access_key: ACCESS
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rules:
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- proto: tcp
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from_port: 80
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to_port: 80
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cidr_ip: 0.0.0.0/0
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- proto: tcp
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from_port: 22
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to_port: 22
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cidr_ip: 10.0.0.0/8
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- proto: udp
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from_port: 10050
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to_port: 10050
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cidr_ip: 10.0.0.0/8
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- proto: udp
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from_port: 10051
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to_port: 10051
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group_id: sg-12345678
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- proto: all
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# the containing group name may be specified here
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group_name: example
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rules_egress:
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- proto: tcp
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from_port: 80
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to_port: 80
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group_name: example-other
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# description to use if example-other needs to be created
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group_desc: other example EC2 group
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'''
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try:
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import boto.ec2
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except ImportError:
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print "failed=True msg='boto required for this module'"
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sys.exit(1)
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def addRulesToLookup(rules, prefix, dict):
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for rule in rules:
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for grant in rule.grants:
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dict["%s-%s-%s-%s-%s-%s" % (prefix, rule.ip_protocol, rule.from_port, rule.to_port,
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grant.group_id, grant.cidr_ip)] = rule
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def get_target_from_rule(module, ec2, rule, name, group, groups, vpc_id):
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"""
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Returns tuple of (group_id, ip) after validating rule params.
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rule: Dict describing a rule.
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name: Name of the security group being managed.
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groups: Dict of all available security groups.
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AWS accepts an ip range or a security group as target of a rule. This
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function validate the rule specification and return either a non-None
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group_id or a non-None ip range.
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"""
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group_id = None
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group_name = None
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ip = None
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target_group_created = False
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if 'group_id' in rule and 'cidr_ip' in rule:
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module.fail_json(msg="Specify group_id OR cidr_ip, not both")
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elif 'group_name' in rule and 'cidr_ip' in rule:
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module.fail_json(msg="Specify group_name OR cidr_ip, not both")
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elif 'group_id' in rule and 'group_name' in rule:
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module.fail_json(msg="Specify group_id OR group_name, not both")
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elif 'group_id' in rule:
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group_id = rule['group_id']
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elif 'group_name' in rule:
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group_name = rule['group_name']
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if group_name in groups:
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group_id = groups[group_name].id
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elif group_name == name:
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group_id = group.id
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groups[group_id] = group
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groups[group_name] = group
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else:
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if not rule.get('group_desc', '').strip():
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module.fail_json(msg="group %s will be automatically created by rule %s and no description was provided" % (group_name, rule))
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if not module.check_mode:
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auto_group = ec2.create_security_group(group_name, rule['group_desc'], vpc_id=vpc_id)
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group_id = auto_group.id
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groups[group_id] = auto_group
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groups[group_name] = auto_group
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target_group_created = True
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elif 'cidr_ip' in rule:
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ip = rule['cidr_ip']
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return group_id, ip, target_group_created
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def main():
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argument_spec = ec2_argument_spec()
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argument_spec.update(dict(
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name=dict(required=True),
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description=dict(required=True),
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vpc_id=dict(),
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rules=dict(),
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rules_egress=dict(),
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state = dict(default='present', choices=['present', 'absent']),
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)
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)
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module = AnsibleModule(
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argument_spec=argument_spec,
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supports_check_mode=True,
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)
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name = module.params['name']
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description = module.params['description']
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vpc_id = module.params['vpc_id']
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rules = module.params['rules']
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rules_egress = module.params['rules_egress']
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state = module.params.get('state')
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changed = False
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ec2 = ec2_connect(module)
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# find the group if present
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group = None
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groups = {}
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for curGroup in ec2.get_all_security_groups():
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groups[curGroup.id] = curGroup
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groups[curGroup.name] = curGroup
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if curGroup.name == name and (vpc_id is None or curGroup.vpc_id == vpc_id):
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group = curGroup
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# Ensure requested group is absent
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if state == 'absent':
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if group:
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'''found a match, delete it'''
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try:
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group.delete()
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except Exception, e:
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module.fail_json(msg="Unable to delete security group '%s' - %s" % (group, e))
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else:
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group = None
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changed = True
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else:
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'''no match found, no changes required'''
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# Ensure requested group is present
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elif state == 'present':
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if group:
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'''existing group found'''
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# check the group parameters are correct
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group_in_use = False
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rs = ec2.get_all_instances()
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for r in rs:
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for i in r.instances:
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group_in_use |= reduce(lambda x, y: x | (y.name == 'public-ssh'), i.groups, False)
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if group.description != description:
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if group_in_use:
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module.fail_json(msg="Group description does not match, but it is in use so cannot be changed.")
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# if the group doesn't exist, create it now
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else:
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'''no match found, create it'''
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if not module.check_mode:
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group = ec2.create_security_group(name, description, vpc_id=vpc_id)
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# When a group is created, an egress_rule ALLOW ALL
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# to 0.0.0.0/0 is added automatically but it's not
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# reflected in the object returned by the AWS API
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# call. We re-read the group for getting an updated object
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# amazon sometimes takes a couple seconds to update the security group so wait till it exists
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while len(ec2.get_all_security_groups(filters={ 'group_id': group.id, })) == 0:
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time.sleep(0.1)
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group = ec2.get_all_security_groups(group_ids=(group.id,))[0]
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changed = True
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else:
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module.fail_json(msg="Unsupported state requested: %s" % state)
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# create a lookup for all existing rules on the group
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if group:
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# Manage ingress rules
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groupRules = {}
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addRulesToLookup(group.rules, 'in', groupRules)
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# Now, go through all provided rules and ensure they are there.
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if rules:
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for rule in rules:
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group_id, ip, target_group_created = get_target_from_rule(module, ec2, rule, name, group, groups, vpc_id)
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if target_group_created:
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changed = True
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if rule['proto'] in ('all', '-1', -1):
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rule['proto'] = -1
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rule['from_port'] = None
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rule['to_port'] = None
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# If rule already exists, don't later delete it
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ruleId = "%s-%s-%s-%s-%s-%s" % ('in', rule['proto'], rule['from_port'], rule['to_port'], group_id, ip)
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if ruleId in groupRules:
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del groupRules[ruleId]
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# Otherwise, add new rule
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else:
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grantGroup = None
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if group_id:
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grantGroup = groups[group_id]
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if not module.check_mode:
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group.authorize(rule['proto'], rule['from_port'], rule['to_port'], ip, grantGroup)
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changed = True
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# Finally, remove anything left in the groupRules -- these will be defunct rules
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for rule in groupRules.itervalues():
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for grant in rule.grants:
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grantGroup = None
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if grant.group_id:
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grantGroup = groups[grant.group_id]
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if not module.check_mode:
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group.revoke(rule.ip_protocol, rule.from_port, rule.to_port, grant.cidr_ip, grantGroup)
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changed = True
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# Manage egress rules
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groupRules = {}
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addRulesToLookup(group.rules_egress, 'out', groupRules)
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# Now, go through all provided rules and ensure they are there.
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if rules_egress:
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for rule in rules_egress:
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group_id, ip, target_group_created = get_target_from_rule(module, ec2, rule, name, group, groups, vpc_id)
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if target_group_created:
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changed = True
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if rule['proto'] in ('all', '-1', -1):
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rule['proto'] = -1
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rule['from_port'] = None
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rule['to_port'] = None
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# If rule already exists, don't later delete it
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ruleId = "%s-%s-%s-%s-%s-%s" % ('out', rule['proto'], rule['from_port'], rule['to_port'], group_id, ip)
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if ruleId in groupRules:
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del groupRules[ruleId]
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# Otherwise, add new rule
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else:
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grantGroup = None
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if group_id:
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grantGroup = groups[group_id].id
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if not module.check_mode:
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ec2.authorize_security_group_egress(
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group_id=group.id,
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ip_protocol=rule['proto'],
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from_port=rule['from_port'],
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to_port=rule['to_port'],
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src_group_id=grantGroup,
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cidr_ip=ip)
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changed = True
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elif vpc_id and not module.check_mode:
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# when using a vpc, but no egress rules are specified,
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# we add in a default allow all out rule, which was the
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# default behavior before egress rules were added
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default_egress_rule = 'out--1-None-None-None-0.0.0.0/0'
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if default_egress_rule not in groupRules:
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ec2.authorize_security_group_egress(
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group_id=group.id,
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ip_protocol=-1,
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from_port=None,
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to_port=None,
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src_group_id=None,
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cidr_ip='0.0.0.0/0'
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)
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changed = True
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else:
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# make sure the default egress rule is not removed
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del groupRules[default_egress_rule]
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# Finally, remove anything left in the groupRules -- these will be defunct rules
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for rule in groupRules.itervalues():
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for grant in rule.grants:
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grantGroup = None
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if grant.group_id:
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grantGroup = groups[grant.group_id].id
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if not module.check_mode:
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ec2.revoke_security_group_egress(
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group_id=group.id,
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ip_protocol=rule.ip_protocol,
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from_port=rule.from_port,
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to_port=rule.to_port,
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src_group_id=grantGroup,
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cidr_ip=grant.cidr_ip)
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changed = True
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if group:
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module.exit_json(changed=changed, group_id=group.id)
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else:
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module.exit_json(changed=changed, group_id=None)
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# import module snippets
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from ansible.module_utils.basic import *
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from ansible.module_utils.ec2 import *
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main()
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