Traffic routing — VirtualService

Route 80% traffic to v1, 20% to v2 (canary split)

kubectl apply -f - <<EOF
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: myapp
spec:
  hosts:
  - myapp
  http:
  - route:
    - destination:
        host: myapp
        subset: v1
      weight: 80
    - destination:
        host: myapp
        subset: v2
      weight: 20
EOF

tool: istio19 commands
tags: istio service-mesh virtualservice routing

More istio commands

Traffic routing — DestinationRule

kubectl apply -f - <<EOF apiVersion: networking.istio.io/v1alpha3 kind: DestinationRule metadata: name: myapp spec: host: myapp trafficPolicy: outlierDetection: consecutive5xxErrors: 5 interval: 10s baseEjectionTime: 30s subsets: - name: v1 labels: version: v1 - name: v2 labels: version: v2 EOF

Define subsets and circuit breaker (outlier detection)
Fault injection — delay

kubectl apply -f - <<EOF apiVersion: networking.istio.io/v1alpha3 kind: VirtualService metadata: name: myapp spec: hosts: - myapp http: - fault: delay: percentage: value: 100 fixedDelay: 5s route: - destination: host: myapp EOF

Inject 5s delay for 100% of requests to test resilience
Traffic mirroring

kubectl apply -f - <<EOF apiVersion: networking.istio.io/v1alpha3 kind: VirtualService metadata: name: myapp spec: hosts: - myapp http: - route: - destination: host: myapp subset: v1 weight: 100 mirror: host: myapp subset: v2 mirrorPercentage: value: 100 EOF

Mirror 100% of traffic to v2 shadow service
Install Istio (demo profile)

istioctl install --set profile=demo -y

Install Istio with the demo configuration profile
Enable sidecar injection

kubectl label namespace default istio-injection=enabled

Enable automatic Envoy sidecar injection for a namespace

all 19 istio commands