aws cli commands related to cloudformation:
===========================================


deploy a new stack from cli:
----------------------------

::

  aws cloudformation deploy --template-file ./ec2_instance_template.yml \
    --stack-name dolcf0x002 --parameter-overrides "KeyName=dkoleary@2023" \
      "InstanceType=t2.nano" "PublicLocation=24.15.136.94/32"

Redploy stack when in ROLLBACK_COMPLETE state:
-----------------------------------------------

Delete it first::

  aws cloudformation delete-stack --stack-name dolcf0x002
  aws cloudformation deploy --template-file ./ec2_instance_template.yml \
    --stack-name dolcf0x002 --parameter-overrides "KeyName=dkoleary@2023" \
      "InstanceType=t2.nano" "PublicLocation=24.15.136.94/32"

Update a deployed stack when template is changed:
-------------------------------------------------

::

  aws cloudformation update-stack --template-body file://dbaccess.yaml \
    --stack-name dolstack0x002

See outputs from stacks:
-------------------------


complete json dump:
...................,

::

  $ aws cloudformation describe-stacks --stack-name dolcf0x002 
  [[lots of json snipped]]

retrieving just the outputs:
.............................

::

  $ aws cloudformation describe-stacks --stack-name dolcf0x002 --query "Stacks[0].Outputs"
  [
      {
          "OutputKey": "InstanceId",
          "OutputValue": "i-096b197430a6484f4",
          "Description": "InstanceId of the EC2 instance"
      },
      {
          "OutputKey": "PublicIP",
          "OutputValue": "3.15.29.181",
          "Description": "Public IP address of the EC2 instance"
      },
      {
          "OutputKey": "AZ",
          "OutputValue": "us-east-2a",
          "Description": "AZ of the EC2 instance"
      },
      {
          "OutputKey": "PublicDNS",
          "OutputValue": "ec2-3-15-29-181.us-east-2.compute.amazonaws.com",
          "Description": "Public DNSName of the EC2 instance"
      }
  ]

to retrieve just one element:
.............................

::

  aws cloudformation describe-stacks --stack-name dolcf0x002 \
    --query "Stacks[0].Outputs[?OutputKey=='PublicIP'].OutputValue" \
    --output text
  3.15.29.181

To retrieve list of stacks:
---------------------------

Active stacks:
..............

::

  $ aws cloudformation list-stacks --output table \
    --stack-status-filter "CREATE_COMPLETE" "CREATE_IN_PROGRESS" \
    --query 'StackSummaries[*].[StackName,StackStatus]'
  -----------------------------------
  |           ListStacks            |
  +-------------+-------------------+
  |  dolcf0x002 |  CREATE_COMPLETE  |
  +-------------+-------------------+

All stacks:
...........

::

  $ aws cloudformation list-stacks --region us-east-1 --output table \
    --query 'StackSummaries[*].[StackName,StackStatus,CreationTime,DeletionTime]'
  -------------------------------------------------------------------------------------------
  |                                       ListStacks                                        |
  +------------+------------------+----------------------------+----------------------------+
  |  dolcf0x002|  DELETE_COMPLETE |  2023-08-27T18:52:56.323Z  |  2023-08-27T19:10:42.371Z  |
  |  dolcf0x002|  DELETE_COMPLETE |  2023-08-27T18:49:10.332Z  |  2023-08-27T18:52:05.160Z  |
  |  dolcf0x002|  DELETE_COMPLETE |  2023-08-27T18:34:58.786Z  |  2023-08-27T18:46:28.572Z  |
  +------------+------------------+----------------------------+----------------------------+