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Rafał Leszko
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Update Kubernetes Code Samples to Hazelcast 4.0 (#414)
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31 files changed

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‎hazelcast-integration/kubernetes/config.yaml‎

Lines changed: 13 additions & 19 deletions
Original file line numberDiff line numberDiff line change
@@ -3,22 +3,16 @@ kind: ConfigMap
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metadata:
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name: hazelcast-configuration
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data:
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hazelcast.xml: |-
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<?xml version="1.0" encoding="UTF-8"?>
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<hazelcast xsi:schemaLocation="http://www.hazelcast.com/schema/config hazelcast-config-3.10.xsd"
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xmlns="http://www.hazelcast.com/schema/config"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
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<properties>
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<property name="hazelcast.discovery.enabled">true</property>
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</properties>
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<network>
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<join>
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<multicast enabled="false"/>
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<tcp-ip enabled="false" />
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<discovery-strategies>
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<discovery-strategy enabled="true" class="com.hazelcast.kubernetes.HazelcastKubernetesDiscoveryStrategy">
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</discovery-strategy>
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</discovery-strategies>
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</join>
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</network>
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</hazelcast>
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hazelcast.yaml: |-
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hazelcast:
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network:
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join:
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multicast:
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enabled: false
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kubernetes:
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enabled: true
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rest-api:
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enabled: true
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endpoint-groups:
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HEALTH_CHECK:
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enabled: true

‎hazelcast-integration/kubernetes/hazelcast-enterprise.yaml‎

Lines changed: 9 additions & 23 deletions
Original file line numberDiff line numberDiff line change
@@ -3,21 +3,21 @@ kind: StatefulSet
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metadata:
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name: hazelcast
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labels:
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app: hazelcast
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app.kubernetes.io/name: hazelcast
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spec:
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replicas: 3
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serviceName: hazelcast-service
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selector:
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matchLabels:
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app: hazelcast
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app.kubernetes.io/name: hazelcast
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template:
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metadata:
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labels:
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app: hazelcast
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app.kubernetes.io/name: hazelcast
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spec:
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containers:
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- name: hazelcast
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image: hazelcast/hazelcast-enterprise:3.10.3
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image: hazelcast/hazelcast-enterprise:4.0
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ports:
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- name: hazelcast
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containerPort: 5701
@@ -27,18 +27,18 @@ spec:
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port: 5701
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initialDelaySeconds: 30
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periodSeconds: 10
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timeoutSeconds: 5
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timeoutSeconds: 10
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successThreshold: 1
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failureThreshold: 3
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failureThreshold: 10
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readinessProbe:
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httpGet:
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path: /hazelcast/health/node-state
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port: 5701
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initialDelaySeconds: 30
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periodSeconds: 10
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timeoutSeconds: 1
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timeoutSeconds: 10
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successThreshold: 1
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failureThreshold: 1
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failureThreshold: 10
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volumeMounts:
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- name: hazelcast-storage
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mountPath: /data/hazelcast
@@ -49,22 +49,8 @@ spec:
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name: hz-enterprise-license
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key: key
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- name: JAVA_OPTS
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value: "-Dhazelcast.rest.enabled=true -Dhazelcast.config=/data/hazelcast/hazelcast.xml"
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value: "-Dhazelcast.config=/data/hazelcast/hazelcast.yaml"
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volumes:
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- name: hazelcast-storage
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configMap:
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name: hazelcast-configuration
57-
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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: hazelcast-service
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spec:
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type: LoadBalancer
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selector:
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app: hazelcast
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ports:
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- protocol: TCP
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port: 5701

‎hazelcast-integration/kubernetes/hazelcast.yaml‎

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Original file line numberDiff line numberDiff line change
@@ -3,21 +3,21 @@ kind: StatefulSet
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metadata:
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name: hazelcast
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labels:
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app: hazelcast
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app.kubernetes.io/name: hazelcast
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spec:
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replicas: 3
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serviceName: hazelcast-service
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selector:
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matchLabels:
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app: hazelcast
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app.kubernetes.io/name: hazelcast
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template:
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metadata:
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labels:
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app: hazelcast
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app.kubernetes.io/name: hazelcast
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spec:
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containers:
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- name: hazelcast
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image: hazelcast/hazelcast:3.10.3
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image: hazelcast/hazelcast:4.0
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ports:
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- name: hazelcast
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containerPort: 5701
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port: 5701
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initialDelaySeconds: 30
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periodSeconds: 10
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timeoutSeconds: 5
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timeoutSeconds: 10
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successThreshold: 1
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failureThreshold: 3
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failureThreshold: 10
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readinessProbe:
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httpGet:
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path: /hazelcast/health/node-state
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port: 5701
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initialDelaySeconds: 30
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periodSeconds: 10
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timeoutSeconds: 1
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timeoutSeconds: 10
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successThreshold: 1
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failureThreshold: 1
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failureThreshold: 10
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volumeMounts:
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- name: hazelcast-storage
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mountPath: /data/hazelcast
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env:
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- name: JAVA_OPTS
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value: "-Dhazelcast.rest.enabled=true -Dhazelcast.config=/data/hazelcast/hazelcast.xml"
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value: "-Dhazelcast.config=/data/hazelcast/hazelcast.yaml"
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volumes:
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- name: hazelcast-storage
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configMap:
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name: hazelcast-configuration
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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: hazelcast-service
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spec:
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type: LoadBalancer
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selector:
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app: hazelcast
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ports:
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- protocol: TCP
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port: 5701

‎hazelcast-integration/kubernetes/samples/README.md‎

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@@ -2,8 +2,14 @@
22

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- <h3>embedded</h3>
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The simplest example to present how to run Java application with embedded Hazelcast on Kubernetes.
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- <h3>external-client</h3>
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The simplest example to present how to run Hazelcast cluster on Kubernetes with a client outside that cluster.
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- <h3>sidecar</h3>
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The simplest example to present how to run Hazelcast as a sidecar container.
59
- <h3>springboot-k8s-hello-world</h3>
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A Spring Boot example for "Hello World", a learning example from the ground up.
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- <h3>ssl</h3>
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The simplest example to present how SSL can be configured for Hazelcast cluster and Hazelcast client.
13+
- <h3>wan</h3>
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The simplest example to present how to run 2 Hazelcast cluster with the geo-replication in between.
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‎hazelcast-integration/kubernetes/samples/embedded/README.md‎

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@@ -2,23 +2,16 @@
22

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This is a sample Spring Boot application with embedded Hazelcast, which presents forming a Hazelcast cluster on Kubernetes.
44

5-
This sample uses Kubernetes API for Hazelcast member discovery.
6-
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## 1. Configure Hazelcast to work on Kubernetes
86

9-
You can configure Hazelcast to work on Kubernetes using the [hazelcast-kubernetes](https://github.com/hazelcast/hazelcast-kubernetes) plugin.
7+
You can configure Hazelcast to work on Kubernetes using the [hazelcast-kubernetes](https://github.com/hazelcast/hazelcast-kubernetes) plugin which is included in `hazelcast-all`.
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Add the following Maven dependencies:
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```xml
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<dependency>
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<groupId>com.hazelcast</groupId>
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<artifactId>hazelcast</artifactId>
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<version>3.11</version>
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</dependency>
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<dependency>
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<groupId>com.hazelcast</groupId>
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<artifactId>hazelcast-kubernetes</artifactId>
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<version>1.3.1</version>
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<artifactId>hazelcast-all</artifactId>
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<version>4.0</version>
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</dependency>
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```
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@@ -33,20 +26,18 @@ public Config hazelcastConfig() {
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}
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```
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36-
The equivalent XML configuration would look as follows:
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```xml
38-
<?xml version="1.0" encoding="UTF-8"?>
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<hazelcast xmlns="http://www.hazelcast.com/schema/config" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.hazelcast.com/schema/config hazelcast-config-3.11.xsd">
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<network>
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<join>
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<multicast enabled="false"/>
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<kubernetes enabled="true"/>
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</join>
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</network>
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</hazelcast>
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The equivalent YAML configuration would look as follows:
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```yaml
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hazelcast:
32+
network:
33+
join:
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multicast:
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enabled: false
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kubernetes:
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enabled: true
4738
```
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49-
Note that this configuration will form a Hazelcast with all Hazelcast instances assigned to services in the current namespace. If you want to filter the instances, use the properties as described [here](https://github.com/hazelcast/hazelcast-kubernetes).
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Note that this configuration will form a Hazelcast with all Hazelcast instances in the current namespace. If you want to filter the instances, use the properties as described [here](https://github.com/hazelcast/hazelcast-kubernetes).
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## 2. Build application and Docker image
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@@ -56,7 +47,7 @@ The following command compiles the project, builds the Docker image, and pushes
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mvn clean compile jib:build -Dimage=leszko/hazelcast-kubernetes-embedded-sample
5748
```
5849

59-
Please change `leszko` to your Docker Hub login. Then, make sure that your image in Docker Hub is public (you can do it on the [Docker Hub website](https://hub.docker.com/)).
50+
Please change `leszko` to your Docker Hub login. Then, make sure that your image in Docker Hub is **public** (you can do it on the [Docker Hub website](https://hub.docker.com/)).
6051

6152
## 3. Grant access to Kubernetes API
6253

@@ -114,6 +105,10 @@ $ kubectl logs pod/hazelcast-embedded-57f84c545b-jjhcs
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115106
Then, you can access the application, by its `EXTERNAL-IP`.
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117-
![Verify Application](markdown/verify-application-1.png)
108+
```
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$ curl 104.154.43.142:8080/put?key=some-key\&value=some-value
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{"response":null}
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119-
![Verify Application](markdown/verify-application-2.png)
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$ curl 104.154.43.142:8080/get?key=some-key
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{"response":"some-value"}
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```

‎hazelcast-integration/kubernetes/samples/embedded/markdown/verify-application-1.png‎

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‎hazelcast-integration/kubernetes/samples/embedded/markdown/verify-application-2.png‎

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‎hazelcast-integration/kubernetes/samples/embedded/pom.xml‎

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<artifactId>spring-boot-starter-parent</artifactId>
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<type>pom</type>
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<scope>import</scope>
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<version>2.0.1.RELEASE</version>
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<version>2.2.6.RELEASE</version>
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</dependency>
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</dependencies>
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</dependencyManagement>
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</dependency>
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<dependency>
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<groupId>com.hazelcast</groupId>
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<artifactId>hazelcast</artifactId>
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<version>3.11</version>
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</dependency>
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<dependency>
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<groupId>com.hazelcast</groupId>
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<artifactId>hazelcast-kubernetes</artifactId>
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<version>1.3.1</version>
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<artifactId>hazelcast-all</artifactId>
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<version>4.0</version>
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</dependency>
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</dependencies>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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<version>2.0.1.RELEASE</version>
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<version>2.2.6.RELEASE</version>
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<executions>
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<execution>
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<goals>

‎hazelcast-integration/kubernetes/samples/embedded/src/main/java/com/hazelcast/kubernetes/CommandController.java‎

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package com.hazelcast.kubernetes;
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import com.hazelcast.core.HazelcastInstance;
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import com.hazelcast.core.IMap;
4+
import com.hazelcast.map.IMap;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RequestParam;

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