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Microservicessystem_design~12 mins

ConfigMaps and Secrets in Microservices - Architecture Diagram

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System Overview - ConfigMaps and Secrets

This system manages configuration data and sensitive information for microservices. It ensures that services can access configuration settings and secrets securely and efficiently without hardcoding them into the application code.

Key requirements include secure storage of secrets, easy updates of configuration without redeploying services, and controlled access to sensitive data.

Architecture Diagram
User
  |
  v
Load Balancer
  |
  v
API Gateway
  |
  v
+----------------+       +----------------+
| Config Service  |<----->| Secret Service  |
+----------------+       +----------------+
       |                          |
       v                          v
+----------------+          +----------------+
| ConfigMap Store|          | Secret Store   |
+----------------+          +----------------+
       |                          |
       v                          v
+---------------------------------------------+
|               Microservices                  |
+---------------------------------------------+
Components
User
user
Initiates requests to microservices
Load Balancer
load_balancer
Distributes incoming requests evenly to API Gateway instances
API Gateway
api_gateway
Routes requests to appropriate microservices and handles authentication
Config Service
service
Provides configuration data from ConfigMaps to microservices
Secret Service
service
Provides sensitive data securely from Secrets to microservices
ConfigMap Store
config_store
Stores non-sensitive configuration data accessible by Config Service
Secret Store
secret_store
Stores encrypted sensitive data accessible by Secret Service
Microservices
service
Consume configuration and secrets to perform business logic
Request Flow - 13 Hops
User → Load Balancer
Load Balancer → API Gateway
API Gateway → Microservices
Microservices → Config Service
Config Service → ConfigMap Store
ConfigMap Store → Config Service
Microservices → Secret Service
Secret Service → Secret Store
Secret Store → Secret Service
Secret Service → Microservices
Microservices → API Gateway
API Gateway → Load Balancer
Load Balancer → User
Failure Scenario
Component Fails:Secret Store
Impact:Microservices cannot retrieve sensitive data, causing failures in operations requiring secrets. Configuration data remains accessible.
Mitigation:Use replicated secret stores with failover. Cache decrypted secrets temporarily in Secret Service to serve reads during outage.
Architecture Quiz - 3 Questions
Test your understanding
Which component securely stores sensitive data like passwords?
AConfigMap Store
BSecret Store
CConfig Service
DAPI Gateway
Design Principle
This architecture separates configuration data and secrets into dedicated services and stores. It ensures secure handling of sensitive information while allowing easy updates to configuration without redeploying microservices. The use of API Gateway and Load Balancer provides scalable and secure request routing.