Add sample for discovery using Zookeper

spring-boot-admin-docs/src/main/asciidoc/index.adoc

@@ -97,7 +97,7 @@ spring.boot.admin.url=http://localhost:8080
 
 If you already using Spring Cloud Discovery for your applications you don't have to add the Spring Boot Admin Client to your applications. Just make the Spring Boot Admin Server a DiscoveryClient, the rest is done by our AutoConfiguration.
 
-The following steps are for using Eureka, but other Spring Cloud Discovery implementations are supported as well. There is an example using Consul (see https://github.com/codecentric/spring-boot-admin/tree/master/spring-boot-admin-samples/spring-boot-admin-sample-consul/[spring-boot-admin-sample-consul]).
+The following steps are for using Eureka, but other Spring Cloud Discovery implementations are supported as well. There are examples using https://github.com/codecentric/spring-boot-admin/tree/master/spring-boot-admin-samples/spring-boot-admin-sample-consul/[Consul] and https://github.com/codecentric/spring-boot-admin/tree/master/spring-boot-admin-samples/spring-boot-admin-sample-zookeeper/[Zookeper]. 
 
 Also have a look at the http://projects.spring.io/spring-cloud/spring-cloud.html[Spring Cloud documentation].
 

spring-boot-admin-samples/pom.xml

@@ -18,6 +18,7 @@
         <module>spring-boot-admin-sample-war</module>
         <module>spring-boot-admin-sample-eureka</module>
         <module>spring-boot-admin-sample-consul</module>
+        <module>spring-boot-admin-sample-zookeeper</module>
         <module>spring-boot-admin-sample-hazelcast</module>
     </modules>
 </project>

spring-boot-admin-samples/spring-boot-admin-sample-zookeeper/pom.xml

+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>de.codecentric</groupId>
+        <artifactId>spring-boot-admin-samples</artifactId>
+        <version>1.3.4-SNAPSHOT</version>
+        <relativePath>..</relativePath>
+    </parent>
+    <artifactId>spring-boot-admin-sample-zookeeper</artifactId>
+    <dependencies>
+        <dependency>
+            <groupId>de.codecentric</groupId>
+            <artifactId>spring-boot-admin-server</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>de.codecentric</groupId>
+            <artifactId>spring-boot-admin-server-ui</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
+        </dependency>
+    </dependencies>
+    <build>
+        <finalName>${project.artifactId}</finalName>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>repackage</goal>
+                        </goals>
+                    </execution>
+                </executions>
+                <configuration>
+                    <mainClass>de.codecentric.boot.admin.SpringBootAdminApplication</mainClass>
+                    <addResources>false</addResources>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>

spring-boot-admin-samples/spring-boot-admin-sample-zookeeper/src/main/java/de/codecentric/boot/admin/SpringBootAdminApplication.java

+/*
+ * Copyright 2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package de.codecentric.boot.admin;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
+import org.springframework.context.annotation.Configuration;
+
+import de.codecentric.boot.admin.config.EnableAdminServer;
+
+@Configuration
+@EnableAutoConfiguration
+@EnableDiscoveryClient
+@EnableAdminServer
+public class SpringBootAdminApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(SpringBootAdminApplication.class, args);
+	}
+
+}

spring-boot-admin-samples/spring-boot-admin-sample-zookeeper/src/main/resources/application.yml

+info:
+  version: 1.0.0
+
+spring:
+  application:
+    name: zookeeper-example
+  cloud:
+    config:
+      enabled: false
+    zookeeper:
+      connect-string: localhost:2181
+      discovery:
+        metadata:
+          management.context-path: /foo
+          health.path: /ping
+
+management.context-path: /foo
+endpoints.health.path: /ping
+

spring-boot-admin-samples/spring-boot-admin-sample-zookeeper/src/main/resources/logback-spring.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+	<include resource="org/springframework/boot/logging/logback/base.xml"/>
+	<jmxConfigurator/>
+</configuration>
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