readme updated

Author: junior

.gitignore

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+.DS_Store
+*.class
+
 target/
 pom.xml.tag
 pom.xml.releaseBackup

README.md

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-# springboot-demo-k8s-mysql
+# Springboot demo app
+
 SpringBoot Demo with MySQL running on Kubernetes
+
+## Build Demo App image
+
+```shell
+docker build --pull --no-cache --squash --rm --progress plain -f Dockerfile -t sbdemo .
+```
+
+## Deploy to Kubernetes
+
+### Create namespace
+
+```shell
+kubectl create namespace demoapp
+```
+
+### Default namespace to demoapp
+
+```shell
+kubectl config set-context --current --namespace=demoapp
+```
+
+### Create MySQL Secrets
+
+```shell
+kubectl create secret generic mysql-secrets \
+  --from-literal=rootpassword=r00tDefaultPassword1! \
+  --from-literal=username=demo \
+  --from-literal=password=defaultPassword1! \
+  --from-literal=database=DB
+```
+
+### Deploy MySQL 5.7
+
+#### Create PVC for MySQl on Oracle Cloud Infrastructure using CSI for Block Volume
+
+```shell
+kubectl apply -f mysql-pvc-oci-bv.yaml
+```
+
+> Use mysql-pv-manual.yaml if deploying local
+
+#### Create Service for MySQL
+
+```shell
+kubectl apply -f mysql-svc.yaml
+```
+
+#### Create Deployment for MySQL
+
+```shell
+kubectl apply -f mysql-dep.yaml
+```
+
+#### Optional: Insert Data
+
+##### Connect to mysql
+
+```shell
+kubectl run -it --rm --image=mysql:5.7 --restart=Never mysql-client -- mysql DB -h mysql -pr00tDefaultPassword1!
+```
+
+Press enter
+
+```shell
+If you don't see a command prompt, try pressing enter.
+
+mysql>
+```
+
+```sql
+insert into users (first_name, last_name) values ('joe', 'doe');
+```
+
+Expected results:
+
+```shell
+If you don't see a command prompt, try pressing enter.
+
+mysql> insert into users (first_name, last_name) values ('joe', 'doe');
+Query OK, 1 row affected (0.00 sec)
+
+mysql> quit
+Bye
+pod "mysql-client" deleted
+```
+
+### Deploy the Spring Boot Demo App
+
+#### Create Service for Demo App
+
+```shell
+kubectl apply -f app-svc.yaml
+```
+
+#### Create Deployment for Demo App
+
+```shell
+kubectl apply -f app-dep.yaml
+```
+
+#### Optional: Check logs
+
+```shell
+kubectl logs -l app=demoapp --follow
+```
+
+#### Optional: Test with port-forward
+
+```shell
+kubectl logs -l app=demoapp --follow
+```