Practical implementation of container deployment of golang functions

Answer: Yes, this article provides a step-by-step guide on how to deploy Go functions to Kubernetes containers, including: Creating Go functions to build Docker images and deploying to Kubernetes practical cases

Container deployment practice of Go function

In today's era of microservice architecture and cloud computing, containers have become a popular way to deploy applications. Containers simplify application deployment and management by providing a consistent and portable running environment. This article will guide you how to deploy Go functions into Kubernetes containers and provide a practical case.

Create Go function

package main

import (
    "context"
    "fmt"
    "net/http"
)

func main() {
    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        fmt.Fprintf(w, "Hello, world!\n")
    })
    http.ListenAndServe(":8080", nil)
}

Build Docker image

Create a Dockerfile file to specify how to build the Docker image:

FROM golang:1.19-slim

WORKDIR /go/src/app

COPY . .

RUN go build -o main

EXPOSE 8080

CMD ["./main"]

Deployment Go to Kubernetes

Create a Kubernetes deployment filedeployment.yaml:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: go-function
spec:
  selector:
    matchLabels:
      app: go-function
  replicas: 1
  template:
    metadata:
      labels:
        app: go-function
    spec:
      containers:
      - name: go-function
        image: my-go-function-image:latest
        ports:
        - containerPort: 8080

Practical case

Suppose you have a Go function for Generate thumbnails of the file contents. You can deploy it to a Kubernetes cluster by following these steps:

1. Build the Go function and deploy it to a container image registry, such as Docker Hub.
2. Create a Kubernetes deployment file and specify to use the Docker image that contains the thumbnail generation function.
3. Deploy to the Kubernetes cluster through the kubectl apply -f deployment.yaml command.
4. Use the Kubernetes service to expose the container through the kubectl expose deployment go-function --type=LoadBalancer command.
5. Access your thumbnail generation service through the load balancer's URL.

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