Add docs/tech_docs/linux/CloudFormation.md

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Certainly! Here's a recommended setup for working with CloudFormation templates on a Debian 12 workstation using Vim as your text editor, along with command-line tools and linters to ensure best practices:
1. Install Vim:
- Vim is likely already installed on your Debian 12 system. If not, you can install it by running:
```
sudo apt install vim
```
2. Configure Vim for JSON and YAML:
- Install the `vim-json` and `vim-yaml` plugins for better syntax highlighting and indentation support. You can use a plugin manager like Vundle or Pathogen to simplify the installation process.
- Configure your `~/.vimrc` file with the following options for better JSON and YAML editing experience:
```
syntax on
filetype plugin indent on
autocmd FileType json setlocal expandtab shiftwidth=2 softtabstop=2
autocmd FileType yaml setlocal expandtab shiftwidth=2 softtabstop=2
```
3. Install command-line tools:
- Install `jq` for processing JSON files:
```
sudo apt install jq
```
- Install `yq` for processing YAML files:
```
sudo apt install yq
```
- Install `json2yaml` and `yaml2json` for converting between JSON and YAML formats:
```
sudo apt install json2yaml yaml2json
```
4. Install linters and validators:
- Install `yamllint` for linting YAML files:
```
sudo apt install yamllint
```
- Install `jsonlint` for validating JSON files:
```
sudo apt install jsonlint
```
5. Set up a validation workflow:
- Create a Bash script named `validate-template.sh` with the following content:
```bash
#!/bin/bash
template_file=$1
# Validate JSON
if [[ $template_file == *.json ]]; then
jsonlint -q $template_file
if [ $? -ne 0 ]; then
echo "JSON validation failed for $template_file"
exit 1
fi
fi
# Validate YAML
if [[ $template_file == *.yaml ]] || [[ $template_file == *.yml ]]; then
yamllint $template_file
if [ $? -ne 0 ]; then
echo "YAML validation failed for $template_file"
exit 1
fi
fi
echo "Template validation succeeded for $template_file"
```
- Make the script executable:
```
chmod +x validate-template.sh
```
- Use this script to validate your CloudFormation templates before deploying them:
```
./validate-template.sh path/to/your/template.yaml
```
With this setup, you can use Vim as your primary text editor for writing CloudFormation templates in JSON or YAML format. The installed plugins and configurations will provide syntax highlighting and proper indentation.
You can use the command-line tools like `jq` and `yq` to process and manipulate your templates, and `json2yaml` and `yaml2json` to convert between the two formats if needed.
The linters, `yamllint` and `jsonlint`, will help you catch any syntax errors or best practice violations in your templates.
Finally, the `validate-template.sh` script automates the validation process, making it easier to ensure your templates are well-formatted and error-free before deploying them.
Remember to always test your templates in a safe environment before using them in production.