DevOps excercises

This repository contains sample spring-boot app - spring-petclinic. It is a starting point for excercises with:

• Gradle/Maven - build tools
• Nexus - artifact management, private repositories
• Docker - containerisation
• Jenkins - CI + CD
• AWS - cloud

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Build tools

1. Getting familiar with wrappers
2. Setting up with build.gradle/pom.xml
3. Getting familiar with test/build/package/checkstyle/install/cleanup processes
4. Adding source control management (SCM)
5. Versioning with release plugin
6. Plugin management
7. Custom jobs (Gradle)
8. Adding custom repositories

Nexus

1. Setting up proxy and private repositories
2. Releasing artifacts to private repository
3. Integration with maven via Nexus Repository Maven Plugin

Docker

1. Containers vs VM
2. How container works
3. Dockerfile and its (best practices)[https://docs.docker.com/develop/develop-images/dockerfile_best-practices/]
4. Multi-stage builds
5. Usage in (local development)[https://docs.docker.com/language/java/develop/]
6. (How to make images smaller)[https://learnk8s.io/blog/smaller-docker-images] - distroless/slim base images + multi-stage + less layers
7. (Vulnerability scanning)[https://docs.docker.com/scout/]
8. Basics of docker compose

Jenkins

1. Core principals of CI/CD
2. Credentials management
3. Plugins
4. Distributed builds using agents
5. Integrate source code management, build tools, and test reports in Jenkins. (>Tools)
6. Manage builds
7. Enviroment variables and parametrised builds
8. Integration with docker
9. Creating basic pipeline

AWS

1. Console + CLI operations
2. Credential management for CLI
3. Creation and usage of basic components: S3, EC2, VPC, ECR, Security Groups, IAM.
4. Some automation with bash scripts

Note: run scripts using source command, eg. source prepare_aws_enviroment.sh