boto/ansible ec2_vol module encrypted attribute issue

[t-readyroc]

(had initially erroneously posted here)

OS X
Ansible 2.5
Python: 2.7
Boto: 2.48

Attempts to use this module to both create and delete ec2 volumes fails with the following output:
AttributeError: 'Volume' object has no attribute 'encrypted'

Code:

      ec2_vol:
        region: us-east-1
        aws_access_key: <redacted>
        aws_secret_key: <redacted>
        instance: "{{ instanceid }}"
        volume_size: "{{ size }}"
        volume_type: gp2
        device_name: /dev/xvdk
        tags: {'Name': "{{ instancename }}:{{ target }}"}
      when: action == "mount"

This error occurs even when explicitly defining an "encrypted: no" attribute in the task (the attribute is optional). The parameters of boto "create_volume" also list "encrypted" as optional, though the error would seem to say otherwise.

[Sakari A. Maaranen]

We also had this problem and developed the following workaround by calling AWS EC2 CLI directly, bypassing the ec2_vol module. Note that the returned JSON is slightly different from what the ec2_vol returns, so you need to adjust any subsequent steps accordingly.

#
# This ansible ec2_vol: usage was replaced 2018-05-17 because it was buggy because it
# complained: 'AttributeError: 'Volume' object has no attribute 'encrypted'\r\n"'
#
#  - name: List EC2 EBS volumes
#    when: ansible_ec2_instance_id is defined
#    ec2_vol:
#      aws_access_key: "{{ ec2_access_key }}"
#      aws_secret_key: "{{ ec2_secret_key }}"
#      instance: "{{ ansible_ec2_instance_id }}"
#      region: "{{ ec2_region }}"
#      state: list
#    register: aws_ec2_ebs

  - name: List EC2 EBS volumes
    when: ansible_ec2_instance_id is defined
    local_action:
      module: shell
      _raw_params: >-
        aws ec2 describe-volumes --output json
        --filters Name=attachment.instance-id,Values={{ ansible_ec2_instance_id }}
    register: aws_ec2_ebs

  - name: Interpret the JSON response
    set_fact:
      aws_ec2_ebs: "{{ aws_ec2_ebs.stdout | from_json }}"