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caktus.aws-web-stacks

Ansible role to automate AWS CloudFormation stack provisioning with aws-web-stacks.

License

This Ansible role is released under the BSD License. See the LICENSE file for more details.

Development sponsored by Caktus Consulting Group, LLC.

Requirements

  • awscli (required to restrict bucket policy)

Installation

  1. Add to your requirements.yml:
---
# file: deployment/requirements.yml

- src: https://github.com/caktus/ansible-role-aws-web-stacks
  name: caktus.aws-web-stacks

2. Copy an aws-web-stacks YAML template (develop branch) to playbooks/files/ec2-nat.yml.

Example

Playbooks

Playbooks to provision and deprovision environments:

---
# file: deployment/playbooks/provision.yml

- name: create/update a cloudformation stack
  hosts: aws
  gather_facts: false
  roles:
    - role: caktus.aws-web-stacks

---
# file: deployment/playbooks/deprovision.yml

- name: create/update a cloudformation stack
  hosts: aws
  gather_facts: false
  roles:
    - role: caktus.aws-web-stacks
      vars:
        cloudformation_stack_state: absent

Run playbook example:

ansible-playbook -vv -i deployment/environments/dev deployment/playbooks/provision.yml

After provisioning, you can graph your inventory:

ansible-inventory -vv -i deployment/environments/dev --graph

Post-provision playbook to ping bastion host:

---
# file: deployment/playbooks/ping.yml

- name: test ping
  hosts: role_bastion
  tasks:
    - ping:

Run playbook example:

ansible-playbook -vv --user ubuntu -i deployment/environments/dev deployment/playbooks/ping.yml

Inventory

Simple inventory for local connections:

# file: deployment/envs/dev/aws

[aws]
aws.amazon.com ansible_connection=local ansible_python_interpreter='/usr/bin/env python3'

Vars

The following examples use Ansible's variable order of precedence to allow overriding specific variables per-environment.

Project (shared across environments) variables:

---
# file: deployment/playbooks/groups_vars/all/caktus.aws-web-stacks.yml

# The following 4 variables could be in another variables file if
# desired, but are included here for simplicity.
project_name: myproject
stack_name: '{{ project_name }}-{{ env_name }}'
aws_profile: myproject
aws_region: us-east-1

# ----------------------------------------------------------------------------
# caktus.aws-web-stacks: Provision a stack with AWS CloudFormation.
# ----------------------------------------------------------------------------

default_cloudformation_stack:

  profile: "{{ aws_profile | mandatory }}"
  region: "{{ aws_region | mandatory }}"
  stack_name: "{{ stack_name | mandatory }}"
  template_bucket: "aws-web-stacks-{{ project_name }}"

  template_parameters:
    AMI: ami-026c8acd92718196b  # Ubuntu 18.04
    AssetsBucketAccessControl: "Private"
    AssetsCloudFrontCertArn: ""
    AssetsUseCloudFront: "false"
    UseAES256Encryption: "true"
    AdministratorIPAddress: "0.0.0.0/0"
    BastionType: "SSH"
    BastionAMI: ami-026c8acd92718196b  # Ubuntu 18.04
    BastionKeyName: "{{ ssh_keypair_name }}"
    CertificateValidationMethod: "(none)"
    ContainerInstanceType: t3.small
    CustomAppCertificateArn: ""
    DatabaseClass: db.t2.small
    DatabaseEngineVersion: "11"
    DatabaseUser: "{{ project_name }}_{{ env_name }}"
    DatabasePassword: "{{ SECRET_DATABASE_PASSWORD }}"
    DatabaseName: "{{ project_name }}_{{ env_name }}"
    DatabaseParameterGroupFamily: postgres11
    DesiredScale: 2
    DomainNameAlternates: ""
    KeyName: "{{ ssh_keypair_name }}"
    MaxScale: 2
    PrimaryAZ: "{{ aws_region }}a"
    SecondaryAZ: "{{ aws_region }}b"
    SecretKey: "{{ SECRET_KEY }}"
  tags:
    Environment: "{{ env_name }}"

# Combine default stack parameters with customizations
cloudformation_stack: >-
  {{ default_cloudformation_stack |
  combine(cloudformation_stack_overrides, recursive=True)
  }}

Per-environment variables:

---
# file: deployment/envs/dev/group_vars/all/vars.yml
env_name: dev
domain: dev.myproject.com

cloudformation_stack_overrides:

  template_parameters:
    ContainerInstanceType: t3.micro
    DomainName: '{{ domain }}'