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‎samples/mysql-schema/Dockerfile

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FROM openjdk:12-alpine
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ENTRYPOINT ["java", "-jar", "/usr/share/operator/operator.jar"]
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ARG JAR_FILE
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ADD target/${JAR_FILE} /usr/share/operator/operator.jar
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‎samples/mysql-schema/README.md

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# WebServer Operator
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This is a more complex example of how a Custom Resource backed by an Operator can serve as
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an abstraction layer. This Operator will use an webserver resource, which mainly contains a
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static webpage definition and creates a nginx Deployment backed by a ConfigMap which holds
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the html.
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This is an example input:
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```yaml
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apiVersion: "sample.javaoperatorsdk/v1"
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kind: WebServer
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metadata:
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name: mynginx-hello
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spec:
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html: |
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<html>
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<head>
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<title>Webserver Operator</title>
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</head>
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<body>
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Hello World!!
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</body>
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</html>
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```
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### Try
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The quickest way to try the operator is to run it on your local machine, while it connects to a local or remote
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Kubernetes cluster. When you start it it will use the current kubectl context on your machine to connect to the cluster.
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Before you run it you have to install the CRD on your cluster by running `kubectl apply -f crd/crd.yaml`
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When the Operator is running you can create some Webserver Custom Resources. You can find a sample custom resource in
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`crd/webserver.yaml`. You can create it by running `kubectl apply -f webserver.yaml`
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After the Operator has picked up the new webserver resource (see the logs) it should create the nginx server in the
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same namespace where the webserver resource is created. To connect to the server using your browser you can
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run `kubectl get service` and view the service created by the Operator. It should have a NodePort configured. If you are
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running a single-node cluster (e.g. Docker for Mac or Minikube) you can connect to the VM on this port to access the
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page.
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You can also try to change the html code in `crd/webserver.yaml` and do another `kubectl apply -f crd/webserver.yaml`.
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This should update the actual nginx deployment with new configuration.
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### Build
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You can build the sample using `mvn dockerfile:build` this will produce a Docker image you can push to the registry
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of your choice. The jar file is built using your local Maven and JDK and then copied into the Docker image.
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### Deployment
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1. Deploy the CRD: kubectl apply -f crd/crd.yaml
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2. Deploy the operator: kubectl apply -f k8s/deployment.yaml

‎samples/mysql-schema/crd/crd.yaml

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apiVersion: apiextensions.k8s.io/v1beta1
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kind: CustomResourceDefinition
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metadata:
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name: schemas.mysql.sample.javaoperatorsdk
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spec:
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group: mysql.sample.javaoperatorsdk
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version: v1
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scope: Namespaced
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names:
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plural: schemas
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singular: schema
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kind: MySQLSchema
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validation:
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openAPIV3Schema:
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type: object
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properties:
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spec:
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type: object
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properties:
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encoding:
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type: string

‎samples/mysql-schema/crd/example.yaml

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apiVersion: "mysql.sample.javaoperatorsdk/v1"
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kind: MySQLSchema
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metadata:
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name: mydb
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spec:
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encoding: utf8

‎samples/mysql-schema/k8s/deployment.yaml

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apiVersion: v1
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kind: Namespace
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metadata:
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name: mysql-schema-operator
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---
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: mysql-schema-operator
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namespace: mysql-schema-operator
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spec:
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selector:
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matchLabels:
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app: mysql-schema-operator
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replicas: 1
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template:
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metadata:
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labels:
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app: mysql-schema-operator
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spec:
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serviceAccount: mysql-schema-operator
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containers:
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- name: operator
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image: mysql-schema-operator
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imagePullPolicy: Never
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ports:
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- containerPort: 80
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env:
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- name: MYSQL_HOST
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value: mysql.mysql
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- name: MYSQL_USER
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value: root
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- name: MYSQL_PASSWORD
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value: password
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readinessProbe:
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httpGet:
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path: /health
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port: 8080
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initialDelaySeconds: 1
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timeoutSeconds: 1
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livenessProbe:
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httpGet:
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path: /health
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port: 8080
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initialDelaySeconds: 30
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timeoutSeconds: 1
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---
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apiVersion: v1
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kind: ServiceAccount
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metadata:
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name: mysql-schema-operator
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namespace: mysql-schema-operator
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRoleBinding
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metadata:
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name: operator-admin
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subjects:
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- kind: ServiceAccount
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name: mysql-schema-operator
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namespace: mysql-schema-operator
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roleRef:
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kind: ClusterRole
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name: cluster-admin
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apiGroup: ""

‎samples/mysql-schema/k8s/mysql.yaml

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apiVersion: v1
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kind: Namespace
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metadata:
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name: mysql
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---
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apiVersion: v1
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kind: Service
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metadata:
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name: mysql
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namespace: mysql
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spec:
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ports:
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- port: 3306
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selector:
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app: mysql
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type: NodePort
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---
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: mysql
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namespace: mysql
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spec:
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selector:
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matchLabels:
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app: mysql
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strategy:
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type: Recreate
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template:
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metadata:
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labels:
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app: mysql
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spec:
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containers:
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- image: mysql:5.6
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name: mysql
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env:
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# Use secret in real usage
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- name: MYSQL_ROOT_PASSWORD
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value: password
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ports:
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- containerPort: 3306
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name: mysql

‎samples/mysql-schema/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>com.github.containersolutions</groupId>
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<artifactId>java-operator-sdk-samples</artifactId>
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<version>0.3.10-SNAPSHOT</version>
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</parent>
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<artifactId>mysql-schema-sample</artifactId>
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<name>Operator SDK - Samples - MySQL Schema</name>
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<description>Provisions new Schemas in a MySQL database</description>
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<packaging>jar</packaging>
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<properties>
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<java.version>8</java.version>
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<maven.compiler.source>1.8</maven.compiler.source>
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<maven.compiler.target>1.8</maven.compiler.target>
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</properties>
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<dependencies>
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<dependency>
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<groupId>com.github.containersolutions</groupId>
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<artifactId>operator-framework</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>org.junit.jupiter</groupId>
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<artifactId>junit-jupiter-engine</artifactId>
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<version>5.4.2</version>
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</dependency>
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<dependency>
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<groupId>org.apache.logging.log4j</groupId>
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<artifactId>log4j-slf4j-impl</artifactId>
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<version>2.11.2</version>
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</dependency>
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<dependency>
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<groupId>org.takes</groupId>
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<artifactId>takes</artifactId>
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<version>1.17</version>
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</dependency>
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<dependency>
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<groupId>mysql</groupId>
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<artifactId>mysql-connector-java</artifactId>
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<version>8.0.18</version>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.8.1</version>
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</plugin>
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<plugin>
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<groupId>com.spotify</groupId>
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<artifactId>dockerfile-maven-plugin</artifactId>
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<version>1.4.12</version>
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<configuration>
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<repository>mysql-schema-operator</repository>
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<tag>latest</tag>
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<buildArgs>
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<JAR_FILE>${project.build.finalName}.jar</JAR_FILE>
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</buildArgs>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-shade-plugin</artifactId>
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<version>2.4.3</version>
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<executions>
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<execution>
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<phase>package</phase>
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<goals>
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<goal>shade</goal>
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</goals>
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<configuration>
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<createDependencyReducedPom>false</createDependencyReducedPom>
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<transformers>
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<transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer" />
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<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
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<manifestEntries>
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<Main-Class>com.github.containersolutions.operator.sample.MySQLSchemaOperator</Main-Class>
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<Build-Number>1.0</Build-Number>
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<Multi-Release>true</Multi-Release>
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</manifestEntries>
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</transformer>
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</transformers>
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<filters>
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<filter>
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<artifact>io.fabric8:openshift-client</artifact>
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<excludes>
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<exclude>io/fabric8/kubernetes/client/Config*</exclude>
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</excludes>
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</filter>
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</filters>
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</configuration>
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</execution>
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</executions>
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</plugin>
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</plugins>
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</build>
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</project>

‎samples/mysql-schema/src/main/java/com/github/containersolutions/operator/sample/MySQLSchemaOperator.java

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package com.github.containersolutions.operator.sample;
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import com.github.containersolutions.operator.Operator;
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import io.fabric8.kubernetes.client.Config;
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import io.fabric8.kubernetes.client.ConfigBuilder;
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import io.fabric8.kubernetes.client.DefaultKubernetesClient;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.takes.facets.fork.FkRegex;
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import org.takes.facets.fork.TkFork;
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import org.takes.http.Exit;
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import org.takes.http.FtBasic;
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import java.io.IOException;
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public class MySQLSchemaOperator {
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private static final Logger log = LoggerFactory.getLogger(MySQLSchemaOperator.class);
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public static void main(String[] args) throws IOException {
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log.info("MySQL Schema Operator starting");
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Config config = new ConfigBuilder().withNamespace(null).build();
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Operator operator = new Operator(new DefaultKubernetesClient(config));
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operator.registerControllerForAllNamespaces(new SchemaController());
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new FtBasic(
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new TkFork(new FkRegex("/health", "ALL GOOD!")), 8080
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).start(Exit.NEVER);
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}
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}

‎samples/mysql-schema/src/main/java/com/github/containersolutions/operator/sample/Schema.java

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package com.github.containersolutions.operator.sample;
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import io.fabric8.kubernetes.client.CustomResource;
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public class Schema extends CustomResource {
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private SchemaSpec spec;
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private SchemaStatus status;
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public SchemaSpec getSpec() {
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return spec;
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}
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public void setSpec(SchemaSpec spec) {
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this.spec = spec;
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}
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public SchemaStatus getStatus() {
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return status;
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}
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public void setStatus(SchemaStatus status) {
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this.status = status;
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}
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}

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