Learn Knative - 10 Code Examples & CST Typing Practice Test

Knative is a Kubernetes-based platform that extends Kubernetes to build, deploy, and manage modern serverless workloads. It simplifies running containerized applications with automatic scaling, eventing, and routing capabilities.

View all 10 Knative code examples →

Simple Knative Service Knative Service with Concurrency Limit Knative Service with Resource Limits Knative Service with Environment Variables Knative Service with Multiple Containers Knative Service with Custom Labels Knative Service with Annotations Knative Service with Revision Naming Knative Service with Probes Knative Service with Scale to Zero

Learn KNATIVE with Real Code Examples

Updated Nov 25, 2025

Introduction & Fundamentals Setup & Configuration Architecture & Deep Internals Performance & Security Development Workflow Learning & Career Growth Business & Strategy Examples

Code Sample Descriptions

Simple Knative Service

# 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.

Let’s Try →

Knative Service with Concurrency Limit

# 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.

Let’s Try →

Knative Service with Resource Limits

# 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.

Let’s Try →

Knative Service with Environment Variables

# 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.

Let’s Try →

Knative Service with Multiple Containers

# 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.

Let’s Try →

Knative Service with Custom Labels

# 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.

Let’s Try →

Knative Service with Annotations

# 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.

Let’s Try →

Knative Service with Revision Naming

# 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.

Let’s Try →

Knative Service with Probes

# 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.

Let’s Try →

Knative Service with Scale to Zero

# 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.

Let’s Try →

Frequently Asked Questions about Knative

What is Knative?

What are the primary use cases for Knative?

Serverless applications on Kubernetes. Event-driven microservices. Automatic scaling workloads. Routing and traffic management for services. Integrating with cloud-native CI/CD pipelines

What are the strengths of Knative?

Automatic scaling reduces resource usage. Supports event-driven serverless architecture. Seamless Kubernetes integration. Flexible routing and traffic management. Extensible and cloud-native friendly

What are the limitations of Knative?

Requires Kubernetes knowledge. Complex setup for beginners. Dependent on cluster resources and networking. Debugging can be more challenging than traditional apps. Limited built-in tooling compared to managed serverless platforms

How can I practice Knative typing speed?

CodeSpeedTest offers 10+ real Knative code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.

Learn Other Programming Languages

C React Python C++Rust TypeScript Kotlin PHP Java C#Ruby Mql Cql N1ql Cypher Gremlin Partiql Haskell Elixir Fsharp View all languages →

Code Sample Descriptions

Simple Knative Service

# 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.

Let’s Try →

Knative Service with Concurrency Limit

# 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.

Let’s Try →

Knative Service with Resource Limits

# 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.

Let’s Try →

Knative Service with Environment Variables

# 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.

Let’s Try →

Knative Service with Multiple Containers

# 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.

Let’s Try →

Knative Service with Custom Labels

# 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.

Let’s Try →

Knative Service with Annotations

# 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.

Let’s Try →

Knative Service with Revision Naming

# 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.

Let’s Try →

Knative Service with Probes

# 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.

Let’s Try →

Knative Service with Scale to Zero

# 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.

Let’s Try →

Frequently Asked Questions about Knative

What is Knative?

What are the primary use cases for Knative?

Serverless applications on Kubernetes. Event-driven microservices. Automatic scaling workloads. Routing and traffic management for services. Integrating with cloud-native CI/CD pipelines

What are the strengths of Knative?

Automatic scaling reduces resource usage. Supports event-driven serverless architecture. Seamless Kubernetes integration. Flexible routing and traffic management. Extensible and cloud-native friendly

What are the limitations of Knative?

How can I practice Knative typing speed?

CodeSpeedTest offers 10+ real Knative code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.