BAEL-574 integrating zipkin into the cloud project

spring-cloud/spring-cloud-bootstrap/gateway/pom.xml

@@ -41,6 +41,11 @@
             <artifactId>spring-boot-starter-data-redis</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-zipkin</artifactId>
+        </dependency>
+
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>

spring-cloud/spring-cloud-bootstrap/gateway/src/main/java/com/baeldung/spring/cloud/bootstrap/gateway/SecurityConfig.java

@@ -23,6 +23,7 @@ public class SecurityConfig extends WebSecurityConfigurerAdapter {
     protected void configure(HttpSecurity http) throws Exception {
         http.authorizeRequests()
             .antMatchers("/book-service/books").permitAll()
+            .antMatchers("/zipkin/**").permitAll()
             .antMatchers("/eureka/**").hasRole("ADMIN")
             .anyRequest().authenticated()
             .and()

spring-cloud/spring-cloud-bootstrap/gateway/src/main/resources/bootstrap.properties

@@ -4,4 +4,12 @@ spring.cloud.config.discovery.enabled=true
 spring.cloud.config.username=configUser
 spring.cloud.config.password=configPassword
 
-eureka.client.serviceUrl.defaultZone=http://discUser:discPassword@localhost:8082/eureka/
+eureka.client.serviceUrl.defaultZone=http://discUser:discPassword@localhost:8082/eureka/
+
+zuul.routes.zipkin.path=/zipkin/**
+zuul.routes.zipkin.sensitive-headers=Set-Cookie,Authorization
+hystrix.command.zipkin.execution.isolation.thread.timeoutInMilliseconds=600000
+
+spring.sleuth.sampler.percentage=1.0
+spring.sleuth.web.skipPattern=(.+?cleanup.*|.+favicon.*)
+spring.zipkin.base-url=http://zipkin