Pre-requisite

• Install Go
• Download Proto compiler
• Get Go lang proto compiler package

go get -u github.com/golang/protobuf/protoc-gen-go

• Install mysql golang package go get -u github.com/go-sql-driver/mysql
• Install MYSQL database
• Create database "testdb"
• Create table

CREATE TABLE `ToDo` ( `ID` bigint(20) NOT NULL AUTO_INCREMENT, `Title` varchar(200) DEFAULT NULL, `Description` varchar(1024) DEFAULT NULL, `Reminder` timestamp NULL DEFAULT NULL, PRIMARY KEY (`ID`), UNIQUE KEY `ID_UNIQUE` (`ID`) );
- Install grpc-gateway and swagger documentation generation plugin go get -u github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway
go get -u github.com/grpc-ecosystem/grpc-gateway/protoc-gen-swagger

todo-service

#server start go run cmd/grpc/server/server-todo-main.go -grpc-port=9090 -http-port=8080 -db-host=docker.for.mac.localhost:3306 -db-user=root -db-password= -db-schema=testdb

#client rest test #cd todo-service/cmd/client-rest #go run main.go -server=http://localhost:8080

#client grpc test #cd todo-service/cmd/grpc/client/ #go run client-todo-main.go -server=localhost:9090

Docker commands

• list of all docker images: docker images

• view all running docker containers: docker ps -a

• remove docker image

docker rm docker rmi go-todo-service:0.1

• removing a pattern image

docker ps -a | grep "<pattern" | awk '{print $2}' | xargs docker rmi

• create image

docker image build --no-cache -t go-todo-service:0.2 .

• running docker command

docker run e.g.: docker run -it go-todo-service:0.1

• Image creation for docker hub

docker image build --no-cache -t akumar75/go-todo-service:0.2 .

• purging any unused or dangling images

docker system prune -a

• pushing image to docker hub

docker push akumar75/go-todo-service:0.2

Kubernetes

• creating secret based on existing Docker credentials

kubectl create secret generic regcred --from-file=.dockerconfigjson=.docker/config.json --type=kubernetes.io/dockerconfigjson

• Inspecting the Secret regcred

kubectl get secret regcred --output=yaml

• Most Common Reason kubernetes deployments fail

https://kukulinski.com/10-most-common-reasons-kubernetes-deployments-fail-part-1/

• Create deployment

kubectl create deployment todo-service-node --image=akumar75/go-todo-service:0.2

#https://kubernetes.io/docs/tutorials/hello-minikube/#create-a-deployment