Day 55: Dynamic Database in AWS – DynamoDB

🧠 What is DynamoDB?

Amazon DynamoDB is a fully managed, serverless, key-value and document NoSQL database designed for single-digit millisecond performance at any scale.

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⚙️ Why DynamoDB for DevOps?

✅ Fully Managed – No server provisioning or patching
✅ Highly Scalable – Auto scaling of throughput & storage
✅ Serverless – Integrates easily with AWS Lambda, API Gateway, etc.
✅ Event-Driven – Triggers via DynamoDB Streams for CI/CD workflows
✅ Secure – Encryption, IAM policies, fine-grained access control

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🧱 DynamoDB Core Concepts

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🛠️ How to Create a DynamoDB Table (via AWS CLI)

aws dynamodb create-table \
    --table-name DevOpsProjects \
    --attribute-definitions AttributeName=ProjectID,AttributeType=S \
    --key-schema AttributeName=ProjectID,KeyType=HASH \
    --provisioned-throughput ReadCapacityUnits=5,WriteCapacityUnits=5

📝 This creates a table DevOpsProjects with ProjectID as the partition key.

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📥 Insert Data into DynamoDB

aws dynamodb put-item \
  --table-name DevOpsProjects \
  --item '{
    "ProjectID": {"S": "day55"},
    "Name": {"S": "DynamoDB Setup"},
    "Status": {"S": "Completed"}
  }'

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📤 Read Data

aws dynamodb get-item \
  --table-name DevOpsProjects \
  --key '{"ProjectID": {"S": "day55"}}'

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🔄 Use Case in DevOps

• Store deployment metadata for builds

• Log automation job results

• Track application configurations

• Session storage for stateless apps

• Manage feature flags or user preferences

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🧪 Optional: Enable Streams

DynamoDB Streams allow you to trigger AWS Lambda functions on data changes:

aws dynamodb update-table \
  --table-name DevOpsProjects \
  --stream-specification StreamEnabled=true,StreamViewType=NEW_AND_OLD_IMAGES

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🔐 Security with IAM

You can create fine-grained access policies to control:

• Table read/write

• Specific items by partition key

• Conditional access

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📦 Summary