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New module: AWS Network load balancer (#33808)
* New module - elb_network_lb * Fix creating a load balancer without tags * Linter Fix purging tags Remove extra imports * add support for cross zone lb, doc update and fix tagging * pep8 fixes * Add integration tests for elb_network_lb module * more pep8 * Remove non-applicable option for NLBs * fix target protocol * pep8
This commit is contained in:
Rob
Ryan Brown
parent
529ef6446e
commit
858f0fc000
12 changed files with 1095 additions and 8 deletions
419
lib/ansible/modules/cloud/amazon/elb_network_lb.py
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lib/ansible/modules/cloud/amazon/elb_network_lb.py
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#!/usr/bin/python
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# Copyright: (c) 2018, Rob White (@wimnat)
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# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
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ANSIBLE_METADATA = {'metadata_version': '1.1',
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'status': ['preview'],
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'supported_by': 'community'}
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DOCUMENTATION = '''
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---
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module: elb_network_lb
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short_description: Manage a Network Load Balancer
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description:
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- Manage an AWS Network Elastic Load Balancer. See
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U(https://aws.amazon.com/blogs/aws/new-network-load-balancer-effortless-scaling-to-millions-of-requests-per-second/) for details.
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version_added: "2.6"
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requirements: [ boto3 ]
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author: "Rob White (@wimnat)"
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options:
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cross_zone_load_balancing:
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description:
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- Indicates whether cross-zone load balancing is enabled.
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required: false
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default: no
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type: bool
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deletion_protection:
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description:
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- Indicates whether deletion protection for the ELB is enabled.
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required: false
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default: no
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type: bool
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listeners:
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description:
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- A list of dicts containing listeners to attach to the ELB. See examples for detail of the dict required. Note that listener keys
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are CamelCased.
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required: false
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name:
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description:
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- The name of the load balancer. This name must be unique within your AWS account, can have a maximum of 32 characters, must contain only alphanumeric
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characters or hyphens, and must not begin or end with a hyphen.
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required: true
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purge_listeners:
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description:
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- If yes, existing listeners will be purged from the ELB to match exactly what is defined by I(listeners) parameter. If the I(listeners) parameter is
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not set then listeners will not be modified
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default: yes
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type: bool
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purge_tags:
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description:
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- If yes, existing tags will be purged from the resource to match exactly what is defined by I(tags) parameter. If the I(tags) parameter is not set then
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tags will not be modified.
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required: false
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default: yes
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type: bool
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subnet_mappings:
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description:
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- A list of dicts containing the IDs of the subnets to attach to the load balancer. You can also specify the allocation ID of an Elastic IP
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to attach to the load balancer. You can specify one Elastic IP address per subnet. This parameter is mutually exclusive with I(subnets)
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required: false
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subnets:
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description:
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- A list of the IDs of the subnets to attach to the load balancer. You can specify only one subnet per Availability Zone. You must specify subnets from
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at least two Availability Zones. Required if state=present. This parameter is mutually exclusive with I(subnet_mappings)
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required: false
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scheme:
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description:
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- Internet-facing or internal load balancer. An ELB scheme can not be modified after creation.
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required: false
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default: internet-facing
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choices: [ 'internet-facing', 'internal' ]
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state:
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description:
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- Create or destroy the load balancer.
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required: true
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choices: [ 'present', 'absent' ]
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tags:
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description:
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- A dictionary of one or more tags to assign to the load balancer.
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required: false
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wait:
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description:
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- Whether or not to wait for the network load balancer to reach the desired state.
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type: bool
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wait_timeout:
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description:
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- The duration in seconds to wait, used in conjunction with I(wait).
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extends_documentation_fragment:
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- aws
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- ec2
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notes:
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- Listeners are matched based on port. If a listener's port is changed then a new listener will be created.
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- Listener rules are matched based on priority. If a rule's priority is changed then a new rule will be created.
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'''
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EXAMPLES = '''
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# Note: These examples do not set authentication details, see the AWS Guide for details.
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# Create an ELB and attach a listener
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- elb_network_lb:
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name: myelb
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subnets:
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- subnet-012345678
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- subnet-abcdef000
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listeners:
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- Protocol: TCP # Required. The protocol for connections from clients to the load balancer (Only TCP is available) (case-sensitive).
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Port: 80 # Required. The port on which the load balancer is listening.
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DefaultActions:
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- Type: forward # Required. Only 'forward' is accepted at this time
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TargetGroupName: mytargetgroup # Required. The name of the target group
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state: present
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# Create an ELB with an attached Elastic IP address
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- elb_network_lb:
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name: myelb
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subnet_mappings:
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- SubnetId: subnet-012345678
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AllocationId: eipalloc-aabbccdd
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listeners:
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- Protocol: TCP # Required. The protocol for connections from clients to the load balancer (Only TCP is available) (case-sensitive).
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Port: 80 # Required. The port on which the load balancer is listening.
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DefaultActions:
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- Type: forward # Required. Only 'forward' is accepted at this time
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TargetGroupName: mytargetgroup # Required. The name of the target group
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state: present
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# Remove an ELB
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- elb_network_lb:
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name: myelb
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state: absent
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'''
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RETURN = '''
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availability_zones:
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description: The Availability Zones for the load balancer.
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returned: when state is present
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type: list
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sample: "[{'subnet_id': 'subnet-aabbccddff', 'zone_name': 'ap-southeast-2a', 'load_balancer_addresses': []}]"
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canonical_hosted_zone_id:
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description: The ID of the Amazon Route 53 hosted zone associated with the load balancer.
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returned: when state is present
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type: string
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sample: ABCDEF12345678
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created_time:
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description: The date and time the load balancer was created.
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returned: when state is present
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type: string
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sample: "2015-02-12T02:14:02+00:00"
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deletion_protection_enabled:
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description: Indicates whether deletion protection is enabled.
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returned: when state is present
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type: string
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sample: true
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dns_name:
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description: The public DNS name of the load balancer.
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returned: when state is present
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type: string
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sample: internal-my-elb-123456789.ap-southeast-2.elb.amazonaws.com
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idle_timeout_timeout_seconds:
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description: The idle timeout value, in seconds.
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returned: when state is present
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type: string
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sample: 60
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ip_address_type:
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description: The type of IP addresses used by the subnets for the load balancer.
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returned: when state is present
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type: string
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sample: ipv4
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listeners:
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description: Information about the listeners.
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returned: when state is present
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type: complex
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contains:
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listener_arn:
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description: The Amazon Resource Name (ARN) of the listener.
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returned: when state is present
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type: string
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sample: ""
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load_balancer_arn:
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description: The Amazon Resource Name (ARN) of the load balancer.
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returned: when state is present
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type: string
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sample: ""
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port:
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description: The port on which the load balancer is listening.
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returned: when state is present
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type: int
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sample: 80
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protocol:
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description: The protocol for connections from clients to the load balancer.
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returned: when state is present
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type: string
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sample: HTTPS
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certificates:
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description: The SSL server certificate.
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returned: when state is present
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type: complex
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contains:
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certificate_arn:
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description: The Amazon Resource Name (ARN) of the certificate.
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returned: when state is present
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type: string
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sample: ""
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ssl_policy:
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description: The security policy that defines which ciphers and protocols are supported.
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returned: when state is present
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type: string
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sample: ""
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default_actions:
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description: The default actions for the listener.
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returned: when state is present
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type: string
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contains:
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type:
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description: The type of action.
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returned: when state is present
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type: string
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sample: ""
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target_group_arn:
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description: The Amazon Resource Name (ARN) of the target group.
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returned: when state is present
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type: string
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sample: ""
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load_balancer_arn:
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description: The Amazon Resource Name (ARN) of the load balancer.
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returned: when state is present
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type: string
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sample: arn:aws:elasticloadbalancing:ap-southeast-2:0123456789:loadbalancer/app/my-elb/001122334455
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load_balancer_name:
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description: The name of the load balancer.
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returned: when state is present
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type: string
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sample: my-elb
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load_balancing_cross_zone_enabled:
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description: Indicates whether cross-zone load balancing is enabled.
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returned: when state is present
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type: string
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sample: true
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scheme:
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description: Internet-facing or internal load balancer.
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returned: when state is present
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type: string
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sample: internal
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state:
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description: The state of the load balancer.
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returned: when state is present
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type: dict
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sample: "{'code': 'active'}"
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tags:
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description: The tags attached to the load balancer.
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returned: when state is present
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type: dict
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sample: "{
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'Tag': 'Example'
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}"
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type:
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description: The type of load balancer.
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returned: when state is present
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type: string
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sample: network
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vpc_id:
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description: The ID of the VPC for the load balancer.
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returned: when state is present
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type: string
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sample: vpc-0011223344
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'''
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from ansible.module_utils.aws.core import AnsibleAWSModule
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from ansible.module_utils.ec2 import camel_dict_to_snake_dict, boto3_tag_list_to_ansible_dict, compare_aws_tags
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from ansible.module_utils.aws.elbv2 import NetworkLoadBalancer, ELBListeners, ELBListener
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def create_or_update_elb(elb_obj):
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"""Create ELB or modify main attributes. json_exit here"""
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if elb_obj.elb:
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# ELB exists so check subnets, security groups and tags match what has been passed
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# Subnets
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if not elb_obj.compare_subnets():
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elb_obj.modify_subnets()
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# Tags - only need to play with tags if tags parameter has been set to something
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if elb_obj.tags is not None:
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# Delete necessary tags
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tags_need_modify, tags_to_delete = compare_aws_tags(boto3_tag_list_to_ansible_dict(elb_obj.elb['tags']),
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boto3_tag_list_to_ansible_dict(elb_obj.tags), elb_obj.purge_tags)
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if tags_to_delete:
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elb_obj.delete_tags(tags_to_delete)
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# Add/update tags
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if tags_need_modify:
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elb_obj.modify_tags()
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else:
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# Create load balancer
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elb_obj.create_elb()
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# ELB attributes
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elb_obj.update_elb_attributes()
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elb_obj.modify_elb_attributes()
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# Listeners
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listeners_obj = ELBListeners(elb_obj.connection, elb_obj.module, elb_obj.elb['LoadBalancerArn'])
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listeners_to_add, listeners_to_modify, listeners_to_delete = listeners_obj.compare_listeners()
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# Delete listeners
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for listener_to_delete in listeners_to_delete:
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listener_obj = ELBListener(elb_obj.connection, elb_obj.module, listener_to_delete, elb_obj.elb['LoadBalancerArn'])
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listener_obj.delete()
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listeners_obj.changed = True
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# Add listeners
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for listener_to_add in listeners_to_add:
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listener_obj = ELBListener(elb_obj.connection, elb_obj.module, listener_to_add, elb_obj.elb['LoadBalancerArn'])
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listener_obj.add()
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listeners_obj.changed = True
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# Modify listeners
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for listener_to_modify in listeners_to_modify:
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listener_obj = ELBListener(elb_obj.connection, elb_obj.module, listener_to_modify, elb_obj.elb['LoadBalancerArn'])
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listener_obj.modify()
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listeners_obj.changed = True
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# If listeners changed, mark ELB as changed
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if listeners_obj.changed:
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elb_obj.changed = True
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# Get the ELB again
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elb_obj.update()
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# Get the ELB listeners again
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listeners_obj.update()
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# Update the ELB attributes
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elb_obj.update_elb_attributes()
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# Convert to snake_case and merge in everything we want to return to the user
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snaked_elb = camel_dict_to_snake_dict(elb_obj.elb)
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snaked_elb.update(camel_dict_to_snake_dict(elb_obj.elb_attributes))
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snaked_elb['listeners'] = []
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for listener in listeners_obj.current_listeners:
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snaked_elb['listeners'].append(camel_dict_to_snake_dict(listener))
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# Change tags to ansible friendly dict
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snaked_elb['tags'] = boto3_tag_list_to_ansible_dict(snaked_elb['tags'])
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elb_obj.module.exit_json(changed=elb_obj.changed, **snaked_elb)
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def delete_elb(elb_obj):
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if elb_obj.elb:
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elb_obj.delete()
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elb_obj.module.exit_json(changed=elb_obj.changed)
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def main():
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argument_spec = (
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dict(
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cross_zone_load_balancing=dict(type='bool'),
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deletion_protection=dict(type='bool'),
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listeners=dict(type='list',
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elements='dict',
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options=dict(
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Protocol=dict(type='str', required=True),
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Port=dict(type='int', required=True),
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SslPolicy=dict(type='str'),
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Certificates=dict(type='list'),
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DefaultActions=dict(type='list', required=True)
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)
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),
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name=dict(required=True, type='str'),
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purge_listeners=dict(default=True, type='bool'),
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purge_tags=dict(default=True, type='bool'),
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subnets=dict(type='list'),
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subnet_mappings=dict(type='list'),
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scheme=dict(default='internet-facing', choices=['internet-facing', 'internal']),
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state=dict(choices=['present', 'absent'], type='str'),
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tags=dict(type='dict'),
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wait_timeout=dict(type='int'),
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wait=dict(type='bool')
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)
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)
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module = AnsibleAWSModule(argument_spec=argument_spec,
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mutually_exclusive=[['subnets', 'subnet_mappings']])
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# Check for subnets or subnet_mappings if state is present
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state = module.params.get("state")
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if state == 'present':
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if module.params.get("subnets") is None and module.params.get("subnet_mappings") is None:
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module.fail_json(msg="'subnets' or 'subnet_mappings' is required when state=present")
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# Quick check of listeners parameters
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listeners = module.params.get("listeners")
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if listeners is not None:
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for listener in listeners:
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for key in listener.keys():
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if key == 'Protocol' and listener[key] != 'TCP':
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module.fail_json(msg="'Protocol' must be 'TCP'")
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connection = module.client('elbv2')
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connection_ec2 = module.client('ec2')
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elb = NetworkLoadBalancer(connection, connection_ec2, module)
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if state == 'present':
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create_or_update_elb(elb)
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else:
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delete_elb(elb)
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if __name__ == '__main__':
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main()
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