Cloudformation
- AWS Cloudformation allows us to create infra based on a template
-
Template can be written in json/yaml format
-
JSON is a file format for representing data. JSON follows key value pair to define it structure
"<key>": <value>
- Value can be of different types
- text: this is generally surrounded with single or double quotes
"movie": "retro" or 'movie': 'retro'
- numer: This is any number
'runtime': 130
- boolean: This has two values
true or false 'theare': false
- list/array: this has values of any type in
[] 'actors': ['surya', 'pooja']
- map/dictionary/object: this generally represents a complex type which requires more key value pairs to describe. This is surronded with
{}
{
"name": "Multicloud",
"starttime": "19:00",
"topics": ["json", "yaml", "cf"],
"mode": ["online", "offline"],
"where": {
"flat": "601-A",
"building": "nilgiri",
"city": "Hyberabad"
}
}
- YAML is a file format for representing data. YAML follows key value pair to define it structure
key: <value>
-
Value can be of different types
- text: this is generally surrounded with single or double quotes
movie: "retro" or movie: 'retro' or movie: retro
- numer: This is any number
runtime: 130
- boolean: This has two values
true or false or yes or no theare: no
- list/array: this has values of any type in
[] actors: ['surya', 'pooja']
“`yaml
actors:</li>
<li>surya</li>
<li>pooja
“`
- map/dictionary/object: this generally represents a complex type which requires more key value pairs to describe. This is surronded with
{}
“`yaml
address:
flatno: 601-A
building: nilgiri</li>
</ul>
“`
* Example
---
name: Multicloud
starttime: '19:00'
topics:
- json
- yaml
- cf
mode:
- online
- offline
where:
flat: 601-A
building: nilgiri
city: Hyberabad
Building Blocks of Cloudformation
- Template: This uses a json or a yaml file in a format defined by aws Format
- Stack: When we want to create infra, we create a cloudformation stack, where we pass the template. By default stack creates everything or nothing. stacks can be updated to recreate/modify the infrastructure created.
Template components
Minimial Template
- This requires only Resources
{
"Resources": {
"mybucket": {
"Type" : "AWS::ServiceName::ResourceType",
"Properties" : {
"PropertyName1" : "PropertyValue1",
}
}
}
}
Lets create a cloudformation template for Network
- Create a new folder & open in visual studio code
- Create a new file
main.json
- To find the structure of vpc google
aws cloudformation vpc
- This is our first template
{
"Resources": {
"network" : {
"Type" : "AWS::EC2::VPC",
"Properties": {
"CidrBlock": "192.168.0.0/16",
"EnableDnsHostnames": true,
"Tags": [{
"Key": "Name",
"Value": "from-cf"
}]
}
}
}
}
- To create a cf stack watch classroom recording
-
To be productive in terms of authoring templates, visual studio code has extensions
-
Refer Here for the changes done.
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