Kubernetes Service Mesh with Istio
Ahmad Raza
Cloud Infrastructure Architect
DevOps Engineer
Deploy the Bookinfo sample application, which is a microservices-based application composed of four separate services.
📑 Deploy Bookinfo Application:
📄 Enable Istio Injection:
Enable automatic sidecar injection for the
default namespace.📑 Redeploy Bookinfo Application:
Redeploy the Bookinfo application to include Istio sidecars:
🛠️ Steps to Set Up and Use Istio:
Install Istio:
Download and install Istio using the provided script.
Verify the installation:
Deploy a Sample Application:
Deploy the Bookinfo application using the provided command.
Verify the deployment:
Enable Istio Injection:
Enable Istio sidecar injection for the
default namespace.Redeploy the Bookinfo application to include Istio sidecars.
🔍 Detailed Example Explanation:
Istio Components:
Pilot: Manages traffic routing and service discovery.
Mixer: Enforces access control and usage policies.
Citadel: Manages certificates and identities for securing communication.
Galley: Manages configuration validation.
Envoy Proxy:
Each service has an Envoy proxy deployed as a sidecar, handling all inbound and outbound traffic. The proxies enforce policies and collect telemetry data.
💡 Benefits for Enterprise Applications:
Traffic Management: Control the flow of traffic and API calls between services.
Security: Secure service-to-service communication with mutual TLS.
Observability: Collect metrics, logs, and traces to monitor service performance.
Resilience: Implement retries, timeouts, and circuit breakers to increase fault tolerance.
📚 Additional Concepts and Examples:
📑 Traffic Shifting:
Gradually shift traffic between different versions of a service.
Example:
📑 Mutual TLS:
Enable mutual TLS for secure communication between services.
Example:
🧪 Hands-on Activity:
Install Istio:
Use the provided commands to download and install Istio.
Deploy the Bookinfo Application:
Deploy the Bookinfo sample application and verify the deployment.
Enable Istio Injection:
Enable Istio sidecar injection and redeploy the Bookinfo application.
Implement Traffic Shifting:
Define and apply a VirtualService to shift traffic between different versions of a service.
Enable Mutual TLS:
Define and apply a PeerAuthentication policy to secure communication with mutual TLS.
Verify and Inspect:
Use
kubectl get pods, istioctl proxy-status, and kubectl describe <resource> to verify and inspect the Istio setup and configurations.
