🧠 Hardcoding the values in code is breach of security and reusing hardcoded values again and again is not a good practice. So today I come across an interesting topic i.e. "Data Sources".
🎯 Data Sources in terraform allows us to read existing information from your cloud provider without creating anything and also minimises the use of hardcoded values in terraform code.
📌 Why Do We Use Data Sources?
- To get IDs of existing VPCs, subnets, AMIs, security groups
- To fetch latest AMI dynamically
- To use existing infrastructure in new Terraform code
- To avoid hardcoding values
💡 Let's take an example, we have shared VPC with multiple teams using it and has 2 subnet. We want to provision 2 EC2 instances in each subnet by giving reference of existing VPC and subnet and also use pre-existing Linux image while creating EC2 instances by using data sources.
My hands-on demo's:
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