iSharkFly-Docs
/
java-tutorials
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Spring Boot Actuator + Kubernetes 

Issue: BAEL-2356
This commit is contained in:
Daniel Barrigas 2018-12-10 21:42:28 +00:00 committed by Josh Cummings
parent 5dec6f7006
commit e51a0d0428
17 changed files with 372 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
spring-cloud/spring-cloud-kubernetes/liveness-example/Dockerfile Normal file
View File

@ -0,0 +1,11 @@
FROM openjdk:8-jdk-alpine
# Create app directory
RUN mkdir -p /usr/opt/service
# Copy app
COPY target/*.jar /usr/opt/service/service.jar
EXPOSE 8080
ENTRYPOINT exec java -jar /usr/opt/service/service.jar

51
spring-cloud/spring-cloud-kubernetes/liveness-example/pom.xml Normal file
View File

@ -0,0 +1,51 @@
<?xml version="1.0" encoding="UTF-8"?>
<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">
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.17.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>liveness-example</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

12
spring-cloud/spring-cloud-kubernetes/liveness-example/src/main/java/com/baeldung/liveness/Application.java Normal file
View File

@ -0,0 +1,12 @@
package com.baeldung.liveness;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}

27
spring-cloud/spring-cloud-kubernetes/liveness-example/src/main/java/com/baeldung/liveness/health/CustomHealthIndicator.java Normal file
View File

@ -0,0 +1,27 @@
package com.baeldung.liveness.health;
import org.springframework.boot.actuate.health.Health;
import org.springframework.boot.actuate.health.HealthIndicator;
import org.springframework.stereotype.Component;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
@Component
public class CustomHealthIndicator implements HealthIndicator {
private boolean isHealthy = true;
public CustomHealthIndicator() {
ScheduledExecutorService scheduled = Executors.newSingleThreadScheduledExecutor();
scheduled.schedule(() -> {
isHealthy = false;
}, 30, TimeUnit.SECONDS);
}
@Override
public Health health() {
return isHealthy ? Health.up().build() : Health.down().build();
}
}

1
spring-cloud/spring-cloud-kubernetes/liveness-example/src/main/resources/resources/application.properties Normal file
View File

@ -0,0 +1 @@
server.port=8080

13
spring-cloud/spring-cloud-kubernetes/liveness-example/src/main/resources/resources/logback.xml Normal file
View File

@ -0,0 +1,13 @@
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
</pattern>
</encoder>
</appender>
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
</configuration>

17
spring-cloud/spring-cloud-kubernetes/liveness-example/src/test/java/com/baeldung/SpringContextIntegrationTest.java Normal file
View File

@ -0,0 +1,17 @@
package com.baeldung;
import com.baeldung.liveness.Application;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest(classes = Application.class)
public class SpringContextIntegrationTest {
@Test
public void contextLoads() {
}
}

54
spring-cloud/spring-cloud-kubernetes/object-configurations/liveness-example-k8s-template.yaml Normal file
View File

@ -0,0 +1,54 @@
apiVersion: v1
kind: Service
metadata:
name: liveness-example
spec:
selector:
app: liveness-example
ports:
- port: 8080
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: liveness-example
spec:
selector:
matchLabels:
app: liveness-example
replicas: 1
strategy:
rollingUpdate:
maxUnavailable: 0
template:
metadata:
labels:
app: liveness-example
spec:
containers:
- name: liveness-example
image: dbdock/liveness-example:1.0.0
imagePullPolicy: IfNotPresent
resources:
requests:
memory: 400Mi
cpu: 400m
ports:
- containerPort: 8080
readinessProbe:
httpGet:
path: /health
port: 8080
initialDelaySeconds: 10
timeoutSeconds: 2
periodSeconds: 3
failureThreshold: 1
livenessProbe:
httpGet:
path: /health
port: 8080
initialDelaySeconds: 20
timeoutSeconds: 2
periodSeconds: 8
failureThreshold: 1

54
spring-cloud/spring-cloud-kubernetes/object-configurations/readiness-example-k8s-template.yaml Normal file
View File

@ -0,0 +1,54 @@
apiVersion: v1
kind: Service
metadata:
name: readiness-example
spec:
selector:
app: readiness-example
ports:
- port: 8080
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: readiness-example
spec:
selector:
matchLabels:
app: readiness-example
replicas: 1
strategy:
rollingUpdate:
maxUnavailable: 0
template:
metadata:
labels:
app: readiness-example
spec:
containers:
- name: readiness-example
image: dbdock/readiness-example:1.0.0
imagePullPolicy: IfNotPresent
resources:
requests:
memory: 400Mi
cpu: 400m
ports:
- containerPort: 8080
readinessProbe:
httpGet:
path: /health
port: 8080
initialDelaySeconds: 40
timeoutSeconds: 2
periodSeconds: 3
failureThreshold: 5
livenessProbe:
httpGet:
path: /health
port: 8080
initialDelaySeconds: 100
timeoutSeconds: 2
periodSeconds: 8
failureThreshold: 1

2
spring-cloud/spring-cloud-kubernetes/pom.xml
View File

@ -11,6 +11,8 @@
<modules>
<module>demo-frontend</module>
<module>demo-backend</module>
<module>liveness-example</module>
<module>readiness-example</module>
</modules>
<parent>

11
spring-cloud/spring-cloud-kubernetes/readiness-example/Dockerfile Normal file
View File

@ -0,0 +1,11 @@
FROM openjdk:8-jdk-alpine
# Create app directory
RUN mkdir -p /usr/opt/service
# Copy app
COPY target/*.jar /usr/opt/service/service.jar
EXPOSE 8080
ENTRYPOINT exec java -jar /usr/opt/service/service.jar

49
spring-cloud/spring-cloud-kubernetes/readiness-example/pom.xml Normal file
View File

@ -0,0 +1,49 @@
<?xml version="1.0" encoding="UTF-8"?>
<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">
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.17.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>readiness-example</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

12
spring-cloud/spring-cloud-kubernetes/readiness-example/src/main/java/com/baeldung/readiness/Application.java Normal file
View File

@ -0,0 +1,12 @@
package com.baeldung.readiness;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}

27
spring-cloud/spring-cloud-kubernetes/readiness-example/src/main/java/com/baeldung/readiness/health/CustomHealthIndicator.java Normal file
View File

@ -0,0 +1,27 @@
package com.baeldung.readiness.health;
import org.springframework.boot.actuate.health.Health;
import org.springframework.boot.actuate.health.HealthIndicator;
import org.springframework.stereotype.Component;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
@Component
public class CustomHealthIndicator implements HealthIndicator {
private boolean isHealthy = false;
public CustomHealthIndicator() {
ScheduledExecutorService scheduled = Executors.newSingleThreadScheduledExecutor();
scheduled.schedule(() -> {
isHealthy = true;
}, 40, TimeUnit.SECONDS);
}
@Override
public Health health() {
return isHealthy ? Health.up().build() : Health.down().build();
}
}

1
spring-cloud/spring-cloud-kubernetes/readiness-example/src/main/resources/resources/application.properties Normal file
View File

@ -0,0 +1 @@
server.port=8080

13
spring-cloud/spring-cloud-kubernetes/readiness-example/src/main/resources/resources/logback.xml Normal file
View File

@ -0,0 +1,13 @@
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
</pattern>
</encoder>
</appender>
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
</configuration>

17
spring-cloud/spring-cloud-kubernetes/readiness-example/src/test/java/com/baeldung/SpringContextIntegrationTest.java Normal file
View File

@ -0,0 +1,17 @@
package com.baeldung;
import com.baeldung.readiness.Application;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest(classes = Application.class)
public class SpringContextIntegrationTest {
@Test
public void contextLoads() {
}
}