CloudFormation Template
Lab Setup
- Install Visual Studio Code
How to Write a CF Template
- Create a directory "hellocf"
- In this directory create a file "main.json"
- Contents of main.json are
{
}
- CF Template has a certain structure to be followed. Refer here for structure
- Lets fill the basic elements in out template
{
"AWSTemplateFormatVersion": "",
"Description": "",
"Resources": {
}
}
- Lets Fill the AWSTemplateFormatVersion by referring here
{
"AWSTemplateFormatVersion": "2010-09-09",
"Description": "",
"Resources": {
}
}
- Lets Fill the Description with some purpose
{
"AWSTemplateFormatVersion": "2010-09-09",
"Description": "This is my first cf template",
"Resources": {
}
}
- Lets Write a Resource to create a network (VPC) in AWS
- Google by using following query aws cloudformation <servicename>
- Now create Resource in Resources section using following syntax
<ResourceName>: {
"Type": "<Resource Type Defined by AWS>",
"Properties" : {
}
}
- Now lets add the myvpc resource with 192.168.0.0/16 as the cidr range
{
"AWSTemplateFormatVersion": "2010-09-09",
"Description": "This is my first cf template",
"Resources": {
"myvpc":{
"Type" : "AWS::EC2::VPC",
"Properties" : {
"CidrBlock" : "192.168.0.0/16",
"Tags" : [
{
"Key": "Name",
"Value": "From CF"
}
]
}
}
}
}
- So far we have written a Template
- Now when we execute this template it becomes Stack
- Stack Creates everything written in Template or nothing
- To Create a stack login into AWS, Navigate to CloudFormation and then create a stack by uploading template.
- Once you are done delete stack.
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