Learn KNATIVE with Real Code Examples

# knative/demo/service.yaml
apiVersion: serving.knative.dev/v1
kind: Service
metadata:
    name: hello-world
    namespace: default
spec:
    template:
        spec:
        containers:
        - image: gcr.io/knative-samples/helloworld-go
        env:
        - name: TARGET
        value: "Knative"

A simple Knative service deploying a containerized HTTP application.

# knative/demo/concurrency.yaml
apiVersion: serving.knative.dev/v1
kind: Service
metadata:
    name: concurrency-demo
    namespace: default
spec:
    template:
        spec:
        containerConcurrency: 1
        containers:
        - image: gcr.io/knative-samples/helloworld-go

A Knative service with max concurrency configured.

# knative/demo/resources.yaml
apiVersion: serving.knative.dev/v1
kind: Service
metadata:
    name: resource-demo
    namespace: default
spec:
    template:
        spec:
        containers:
        - image: gcr.io/knative-samples/helloworld-go
        resources:
        limits:
        memory: "128Mi"
        cpu: "500m"

Set CPU and memory limits on a Knative container.

# knative/demo/env.yaml
apiVersion: serving.knative.dev/v1
kind: Service
metadata:
    name: env-demo
    namespace: default
spec:
    template:
        spec:
        containers:
        - image: gcr.io/knative-samples/helloworld-go
        env:
        - name: GREETING
        value: "Hello Knative"

Set environment variables for a Knative service container.

# knative/demo/multi-container.yaml
apiVersion: serving.knative.dev/v1
kind: Service
metadata:
    name: multi-demo
    namespace: default
spec:
    template:
        spec:
        containers:
        - image: gcr.io/knative-samples/helloworld-go
        - image: gcr.io/knative-samples/sidecar

Demonstrates a Knative service with multiple containers in a pod.

# knative/demo/labels.yaml
apiVersion: serving.knative.dev/v1
kind: Service
metadata:
    name: label-demo
    namespace: default
    labels:
        team: devops
        env: staging
spec:
    template:
        spec:
        containers:
        - image: gcr.io/knative-samples/helloworld-go

Add labels to a Knative service metadata.

# knative/demo/annotations.yaml
apiVersion: serving.knative.dev/v1
kind: Service
metadata:
    name: annotation-demo
    namespace: default
    annotations:
        autoscaling.knative.dev/minScale: "1"
        autoscaling.knative.dev/maxScale: "3"
spec:
    template:
        spec:
        containers:
        - image: gcr.io/knative-samples/helloworld-go

Use annotations to configure autoscaling behavior in Knative.

# knative/demo/revision.yaml
apiVersion: serving.knative.dev/v1
kind: Service
metadata:
    name: revision-demo
    namespace: default
spec:
    template:
        metadata:
        name: rev1
        spec:
        containers:
        - image: gcr.io/knative-samples/helloworld-go

Configure revision name template for a Knative service.

# knative/demo/probes.yaml
apiVersion: serving.knative.dev/v1
kind: Service
metadata:
    name: probe-demo
    namespace: default
spec:
    template:
        spec:
        containers:
        - image: gcr.io/knative-samples/helloworld-go
        readinessProbe:
        httpGet:
        path: /health
        port: 8080

Configure readiness and liveness probes for Knative containers.

# knative/demo/scale-to-zero.yaml
apiVersion: serving.knative.dev/v1
kind: Service
metadata:
    name: scale-zero-demo
    namespace: default
spec:
    template:
        spec:
        containers:
        - image: gcr.io/knative-samples/helloworld-go
        autoscaling.knative.dev/minScale: "0"

Configure a Knative service that scales down to zero when idle.