base on Microservices With Spring, Docker, Kubernetes - Code Examples # Master Microservices with Spring Boot, Docker, Kubernetes [](https://www.udemy.com/course/master-microservices-with-spring-docker-kubernetes/?referralCode=9365DB9B7EE637F629A9) Learn how to create enterprise and production ready Microservices with Spring, Spring Cloud, Docker and Kubernetes. ## Topics covered in the course * Section 1 - Introduction to Microservices Architecture * Section 2- Building microservices using Spring Boot * Section 3 - How do we right size our microservices & identify boundaries * Section 4 - Handle deployment, portability & scalability of microservices using Docker * Section 5 - Deep Dive on Cloud Native Apps & 15-Factor methodology * Section 6 - Configurations Management in Microservices * Section 7 - Using MySQL DBs inside microservices * Section 8 - Service Discovery & Service Registration in microservices * Section 9 - Gateway, Routing & Cross cutting concerns in Microservices * Section 10 - Making Microservices Resilient * Section 11 - Observability and monitoring of microservices * Section 12 - Microservices Security * Section 13 - Event Driven microservices using RabbitMQ,Spring Cloud Functions & Stream * Section 14 - Event Driven microservices using Kafka,Spring Cloud Functions & Stream * Section 15 - Container Orchestration using Kubernetes * Section 16 - Deep dive on Helm * Section 17 - Server-side service discovery and load balancing using Kubernetes * Section 18 - Deploying microservices into cloud K8s cluster * Section 19 - Introduction to K8s Ingress, Service Mesh (Istio) & mTLS * Section 20 - Congratulations & Thank You ## Pre-requisite for the course - Good understanding on Java and Spring concepts - Basic understanding on SpringBoot & REST services is a bonus but not mandatory - Interest to learn and explore about Microservices # Important Links - Spring Boot - https://spring.io/projects/spring-boot - Create SpringBoot project - https://start.spring.io - DTO pattern blog - https://martinfowler.com/eaaCatalog/dataTransferObject.html - Model Mapper - http://modelmapper.org/ - Map Struct - https://mapstruct.org/ - Spring Doc - https://springdoc.org/ - Open API - https://www.openapis.org/ - Lucidchart Blog - https://www.lucidchart.com/blog/ddd-event-storming - Docker website - https://www.docker.com - Docker hub website - https://hub.docker.com - Buildpacks website - https://buildpacks.io - Google Jib website - https://github.com/GoogleContainerTools/jib - Docker compose website - https://docs.docker.com/compose/ - Twelve-Factor methodology - https://12factor.net - Beyond the Twelve-Factor App book - https://www.oreilly.com/library/view/beyond-the-twelve-factor/9781492042631/ - Spring Cloud website - https://spring.io/projects/spring-cloud - Spring Cloud Config website - https://spring.io/projects/spring-cloud-config - Spring Cloud Bus website - https://spring.io/projects/spring-cloud-bus - RabbitMQ website - https://www.rabbitmq.com - Hookdeck website- https://hookdeck.com - Spring Cloud Netflix website - https://spring.io/projects/spring-cloud-netflix - Spring Cloud OpenFeign - https://spring.io/projects/spring-cloud-openfeign - Netflix Blog - https://netflixtechblog.com/netflix-oss-and-spring-boot-coming-full-circle-4855947713a0 - Resilience4j website - https://resilience4j.readme.io - Spring Cloud Gateway website - https://spring.io/projects/spring-cloud-gateway - Stripe RateLimitter pattern blog - https://stripe.com/blog/rate-limiters - Apache Benchmark website - https://httpd.apache.org - Grafana website - https://grafana.com - Grafana Loki setup - https://grafana.com/docs/loki/latest/get-started/quick-start/ - Micrometer website - https://micrometer.io - Prometheus website - https://prometheus.io/ - Grafana Dashboards - https://grafana.com/grafana/dashboards/ - OpenTelemetry website - https://opentelemetry.io/ - OpenTelemetry automatic instrumentation - https://opentelemetry.io/docs/instrumentation/java/automatic/ - Keycloak website - https://www.keycloak.org/ - Apache Kafka website - https://kafka.apache.org - Docker compose file for Kafka - https://github.com/bitnami/containers/blob/main/bitnami/kafka/docker-compose.yml - Local Kubernetes Cluster with Docker Desktop - https://docs.docker.com/desktop/kubernetes/ - Kubernetes Dashboard - https://kubernetes.io/docs/tasks/access-application-cluster/web-ui-dashboard/ - Helm website - https://helm.sh - Chocolatey website - https://chocolatey.org/ - Bitnami Helm charts GitHub repo - https://github.com/bitnami/charts - Spring Cloud Kubernetes website - https://spring.io/projects/spring-cloud-kubernetes - Spring Cloud Kubernetes Blog - https://spring.io/blog/2021/10/26/new-features-for-spring-cloud-kubernetes-in-spring-cloud-2021-0-0-m3 - GCP website - https://cloud.google.com - GCP SDK installation - https://cloud.google.com/sdk/docs/install - Kubernetes Ingress - https://kubernetes.io/docs/concepts/services-networking/ingress/ - Ingress Controllers - https://kubernetes.io/docs/concepts/services-networking/ingress-controllers/ - Istio (Service mesh) - https://istio.io ## Maven Commands used in the course | Maven Command | Description | | ------------- | ------------- | | "mvn clean install -Dmaven.test.skip=true" | To generate a jar inside target folder | | "mvn spring-boot:run" | To start a springboot maven project | | "mvn spring-boot:build-image" | To generate a docker image using Buildpacks. No need of Dockerfile | | "mvn compile jib:dockerBuild" | To generate a docker image using Google Jib. No need of Dockerfile | ## Docker Commands used in the course | Docker Command | Description | | ------------- | ------------- | | "docker build . -t eazybytes/accounts:s4" | To generate a docker image based on a Dockerfile | | "docker run -p 8080:8080 eazybytes/accounts:s4" | To start a docker container based on a given image | | "docker images" | To list all the docker images present in the Docker server | | "docker image inspect image-id" | To display detailed image information for a given image id | | "docker image rm image-id" | To remove one or more images for a given image ids | | "docker image push docker.io/eazybytes/accounts:s4" | To push an image or a repository to a registry | | "docker image pull docker.io/eazybytes/accounts:s4" | To pull an image or a repository from a registry | | "docker ps" | To show all running containers | | "docker ps -a" | To show all containers including running and stopped | | "docker container start container-id" | To start one or more stopped containers | | "docker container pause container-id" | To pause all processes within one or more containers | | "docker container unpause container-id" | To unpause all processes within one or more containers | | "docker container stop container-id" | To stop one or more running containers | | "docker container kill container-id" | To kill one or more running containers instantly | | "docker container restart container-id" | To restart one or more containers | | "docker container inspect container-id" | To inspect all the details for a given container id | | "docker container logs container-id" | To fetch the logs of a given container id | | "docker container logs -f container-id" | To follow log output of a given container id | | "docker container rm container-id" | To remove one or more containers based on container ids | | "docker container prune" | To remove all stopped containers | | "docker compose up" | Creates and starts containers based on the given Docker Compose file | | "docker compose down" | Stops and removes containers, networks, volumes, and images created by up | | "docker compose start" | Starts existing (previously created) containers without recreating them | | "docker compose stop" | Stops running containers without removing them | | "docker run -p 3306:3306 --name accountsdb -e MYSQL_ROOT_PASSWORD=root -e MYSQL_DATABASE=accountsdb -d mysql" | To create a MySQL DB container | | "docker run -p 6379:6379 --name eazyredis -d redis" | To create a Redis Container | | "docker run -p 8080:8080 -e KEYCLOAK_ADMIN=admin -e KEYCLOAK_ADMIN_PASSWORD=admin quay.io/keycloak/keycloak:22.0.3 start-dev" | To create Keycloak Container| ## Apache Benchmark command used in the course | Apache Benchmark command | Description | | ------------- | ------------- | | "ab -n 10 -c 2 -v 3 http://localhost:8072/eazybank/cards/api/contact-info" | To perform load testing on API by sending 10 requests | ## Kubernetes Commands used in the course | Kubernetes Command | Description | | ------------- | ------------- | | "kubectl apply -f filename" | To create a deployment/service/configmap based on a given YAML file | | "kubectl get all" | To get all the components inside your cluster | | "kubectl get pods" | To get all the pods details inside your cluster | | "kubectl get pod pod-id" | To get the details of a given pod id | | "kubectl describe pod pod-id" | To get more details of a given pod id | | "kubectl delete pod pod-id" | To delete a given pod from cluster | | "kubectl get services" | To get all the services details inside your cluster | | "kubectl get service service-id" | To get the details of a given service id | | "kubectl describe service service-id" | To get more details of a given service id | | "kubectl get nodes" | To get all the node details inside your cluster | | "kubectl get node node-id" | To get the details of a given node | | "kubectl get replicasets" | To get all the replica sets details inside your cluster | | "kubectl get replicaset replicaset-id" | To get the details of a given replicaset | | "kubectl get deployments" | To get all the deployments details inside your cluster | | "kubectl get deployment deployment-id" | To get the details of a given deployment | | "kubectl get configmaps" | To get all the configmap details inside your cluster | | "kubectl get configmap configmap-id" | To get the details of a given configmap | | "kubectl get events --sort-by=.metadata.creationTimestamp" | To get all the events occured inside your cluster | | "kubectl scale deployment accounts-deployment --replicas=1" | To set the number of replicas for a deployment inside your cluster | | "kubectl set image deployment gatewayserver-deployment gatewayserver=eazybytes/gatewayserver:s11 --record" | To set a new image for a deployment inside your cluster | | "kubectl rollout history deployment gatewayserver-deployment" | To know the rollout history for a deployment inside your cluster | | "kubectl rollout undo deployment gatewayserver-deployment --to-revision=1" | To rollback to a given revision for a deployment inside your cluster | | "kubectl get pvc" | To list the pvcs inside your cluster | | "kubectl delete pvc data-happy-panda-mariadb-0" | To delete a pvc inside your cluster | ## Helm Commands used in the course | Helm Command | Description | | ------------- | ------------- | | "helm create [NAME]" | Create a default chart with the given name | | "helm dependencies build" | To recompile the given helm chart | | "helm install [NAME] [CHART]" | Install the given helm chart into K8s cluster | | "helm upgrade [NAME] [CHART]" | Upgrades a specified release to a new version of a chart | | "helm history [NAME]" | Display historical revisions for a given release | | "helm rollback [NAME] [REVISION]" | Roll back a release to a previous revision | | "helm uninstall [NAME]" | Uninstall all of the resources associated with a given release | | "helm template [NAME] [CHART]" | Render chart templates locally along with the values | | "helm list" | Lists all of the helm releases inside a K8s cluster | ", Assign "at most 3 tags" to the expected json: {"id":"6656","tags":[]} "only from the tags list I provide: [{"id":77,"name":"3d"},{"id":89,"name":"agent"},{"id":17,"name":"ai"},{"id":54,"name":"algorithm"},{"id":24,"name":"api"},{"id":44,"name":"authentication"},{"id":3,"name":"aws"},{"id":27,"name":"backend"},{"id":60,"name":"benchmark"},{"id":72,"name":"best-practices"},{"id":39,"name":"bitcoin"},{"id":37,"name":"blockchain"},{"id":1,"name":"blog"},{"id":45,"name":"bundler"},{"id":58,"name":"cache"},{"id":21,"name":"chat"},{"id":49,"name":"cicd"},{"id":4,"name":"cli"},{"id":64,"name":"cloud-native"},{"id":48,"name":"cms"},{"id":61,"name":"compiler"},{"id":68,"name":"containerization"},{"id":92,"name":"crm"},{"id":34,"name":"data"},{"id":47,"name":"database"},{"id":8,"name":"declarative-gui "},{"id":9,"name":"deploy-tool"},{"id":53,"name":"desktop-app"},{"id":6,"name":"dev-exp-lib"},{"id":59,"name":"dev-tool"},{"id":13,"name":"ecommerce"},{"id":26,"name":"editor"},{"id":66,"name":"emulator"},{"id":62,"name":"filesystem"},{"id":80,"name":"finance"},{"id":15,"name":"firmware"},{"id":73,"name":"for-fun"},{"id":2,"name":"framework"},{"id":11,"name":"frontend"},{"id":22,"name":"game"},{"id":81,"name":"game-engine "},{"id":23,"name":"graphql"},{"id":84,"name":"gui"},{"id":91,"name":"http"},{"id":5,"name":"http-client"},{"id":51,"name":"iac"},{"id":30,"name":"ide"},{"id":78,"name":"iot"},{"id":40,"name":"json"},{"id":83,"name":"julian"},{"id":38,"name":"k8s"},{"id":31,"name":"language"},{"id":10,"name":"learning-resource"},{"id":33,"name":"lib"},{"id":41,"name":"linter"},{"id":28,"name":"lms"},{"id":16,"name":"logging"},{"id":76,"name":"low-code"},{"id":90,"name":"message-queue"},{"id":42,"name":"mobile-app"},{"id":18,"name":"monitoring"},{"id":36,"name":"networking"},{"id":7,"name":"node-version"},{"id":55,"name":"nosql"},{"id":57,"name":"observability"},{"id":46,"name":"orm"},{"id":52,"name":"os"},{"id":14,"name":"parser"},{"id":74,"name":"react"},{"id":82,"name":"real-time"},{"id":56,"name":"robot"},{"id":65,"name":"runtime"},{"id":32,"name":"sdk"},{"id":71,"name":"search"},{"id":63,"name":"secrets"},{"id":25,"name":"security"},{"id":85,"name":"server"},{"id":86,"name":"serverless"},{"id":70,"name":"storage"},{"id":75,"name":"system-design"},{"id":79,"name":"terminal"},{"id":29,"name":"testing"},{"id":12,"name":"ui"},{"id":50,"name":"ux"},{"id":88,"name":"video"},{"id":20,"name":"web-app"},{"id":35,"name":"web-server"},{"id":43,"name":"webassembly"},{"id":69,"name":"workflow"},{"id":87,"name":"yaml"}]" returns me the "expected json"