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How does GKE handle workload deployment and what tools can be used for packaging and deployment?

by EITCA Academy / Thursday, 03 August 2023 / Published in Cloud Computing, EITC/CL/GCP Google Cloud Platform, GCP basic concepts, Google Kubernetes Engine GKE, Examination review

Google Kubernetes Engine (GKE) is a managed environment for deploying, managing, and scaling containerized applications using Kubernetes on Google Cloud Platform (GCP). GKE handles workload deployment by providing a robust and scalable infrastructure that simplifies the process of packaging and deploying applications.

To deploy workloads on GKE, there are several tools and techniques that can be used. Let's explore them in detail:

1. Kubernetes Deployments: GKE leverages Kubernetes Deployments to manage the deployment of containerized applications. A Deployment defines the desired state of the application and ensures that the specified number of replicas are running and available. It handles rolling updates, scaling, and rollback of application versions. Deployments can be created using YAML or JSON configuration files, which describe the desired state of the application.

Example Deployment YAML file:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-app
spec:
  replicas: 3
  selector:
    matchLabels:
      app: my-app
  template:
    metadata:
      labels:
        app: my-app
    spec:
      containers:
      - name: my-app-container
        image: gcr.io/my-project/my-app:latest
        ports:
        - containerPort: 8080

2. Container Registry: GKE integrates with Google Container Registry (GCR) for storing and managing container images. Container images can be built using tools like Docker and pushed to GCR. GCR provides a secure and scalable platform for hosting container images, which can be easily pulled by GKE for deployment. GCR also supports versioning and tagging of container images, enabling easy rollback and management of application versions.

Example commands for building and pushing a container image to GCR:

docker build -t gcr.io/my-project/my-app:latest .
docker push gcr.io/my-project/my-app:latest

3. Helm Charts: Helm is a package manager for Kubernetes that simplifies the deployment and management of applications on GKE. Helm uses charts, which are packages that contain all the resources required to run an application. Charts can be customized using values files, which allow users to provide configuration parameters specific to their deployment. Helm charts can be easily shared and versioned, making it easier to deploy complex applications with multiple components.

Example Helm chart for deploying an application:

apiVersion: v2
name: my-app
description: My Application
version: 1.0.0
appVersion: 1.0.0
dependencies:
  - name: mongodb
    version: 3.6.3
    repository: https://charts.bitnami.com/bitnami

4. Continuous Integration/Continuous Deployment (CI/CD) Pipelines: GKE integrates with popular CI/CD tools like Jenkins, GitLab CI/CD, and Google Cloud Build to automate the packaging and deployment of applications. These tools can be used to define pipelines that build container images, run tests, and deploy applications to GKE. CI/CD pipelines ensure that applications are continuously delivered and updated in a controlled and automated manner.

Example Jenkins pipeline for building and deploying a GKE application:

pipeline {
  agent any
  stages {
    stage('Build') {
      steps {
        sh 'docker build -t gcr.io/my-project/my-app:${BUILD_NUMBER} .'
        sh 'docker push gcr.io/my-project/my-app:${BUILD_NUMBER}'
      }
    }
    stage('Deploy') {
      steps {
        sh 'kubectl set image deployment/my-app my-app=gcr.io/my-project/my-app:${BUILD_NUMBER}'
      }
    }
  }
}

GKE handles workload deployment by leveraging Kubernetes Deployments and integrating with tools like Container Registry, Helm, and CI/CD pipelines. These tools and techniques simplify the packaging and deployment of containerized applications on GKE, enabling developers to focus on building and scaling their applications.

Other recent questions and answers regarding EITC/CL/GCP Google Cloud Platform:

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View more questions and answers in EITC/CL/GCP Google Cloud Platform

More questions and answers:

  • Field: Cloud Computing
  • Programme: EITC/CL/GCP Google Cloud Platform (go to the certification programme)
  • Lesson: GCP basic concepts (go to related lesson)
  • Topic: Google Kubernetes Engine GKE (go to related topic)
  • Examination review
Tagged under: CI/CD, Cloud Computing, Container Registry, Containerization, Deployment, GCP, GKE, Google Cloud Platform, Google Kubernetes Engine, Helm, Kubernetes
Home » Cloud Computing / EITC/CL/GCP Google Cloud Platform / Examination review / GCP basic concepts / Google Kubernetes Engine GKE » How does GKE handle workload deployment and what tools can be used for packaging and deployment?

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