所以我最近的任务是构建一个简单的 k8s 运算符，该运算符的 CRD 只包含一个字符串。每当创建该类型的新资源时，它都会读取该字符串并将其记录到 Pod 日志中。听起来很简单吧？
好吧，考虑到我几乎没有任何使用 k8s 的经验，也没有制作操作符的经验，所以我在网上找到了一些教程，解释了如何使用 spring-boot 构建操作符（我的任务的一部分是我必须使用弹簧启动）。我已按照本教程进行操作，然后尝试出于我的目的更改代码，但我不断收到 ChatGPT 描述为库版本不匹配的错误，并且我不知道如何解决此问题。
2024-03-27T12:10:33.700Z INFO 1 --- [operator] [ main] d.example.operator.OperatorApplication : Starting OperatorApplication v0.0.1-SNAPSHOT using Java 17.0.2 with PID 1 (/app.jar started by root in /)
2024-03-27T12:10:33.702Z INFO 1 --- [operator] [ main] d.example.operator.OperatorApplication : No active profile set, falling back to 1 default profile: "default"
2024-03-27T12:10:34.241Z WARN 1 --- [operator] [ main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'kubernetesClient' defined in class path resource [io/javaoperatorsdk/operator/springboot/starter/OperatorAutoConfiguration.class]: Failed to instantiate [io.fabric8.kubernetes.client.KubernetesClient]: Factory method 'kubernetesClient' threw exception with message: class io.fabric8.kubernetes.client.okhttp.OkHttpClientImpl overrides final method io.fabric8.kubernetes.client.http.StandardHttpClient.close()V
2024-03-27T12:10:34.246Z INFO 1 --- [operator] [ main] .s.b.a.l.ConditionEvaluationReportLogger :
Error starting ApplicationContext. To display the condition evaluation report re-run your application with 'debug' enabled.
2024-03-27T12:10:34.254Z ERROR 1 --- [operator] [ main] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'kubernetesClient' defined in class path resource [io/javaoperatorsdk/operator/springboot/starter/OperatorAutoConfiguration.class]: Failed to instantiate [io.fabric8.kubernetes.client.KubernetesClient]: Factory method 'kubernetesClient' threw exception with message: class io.fabric8.kubernetes.client.okhttp.OkHttpClientImpl overrides final method io.fabric8.kubernetes.client.http.StandardHttpClient.close()V
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:648) ~[spring-beans-6.1.5.jar!/:6.1.5]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:636) ~[spring-beans-6.1.5.jar!/:6.1.5]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1335) ~[spring-beans-6.1.5.jar!/:6.1.5]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1165) ~[spring-beans-6.1.5.jar!/:6.1.5]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:562) ~[spring-beans-6.1.5.jar!/:6.1.5]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:522) ~[spring-beans-6.1.5.jar!/:6.1.5]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326) ~[spring-beans-6.1.5.jar!/:6.1.5]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.1.5.jar!/:6.1.5]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324) ~[spring-beans-6.1.5.jar!/:6.1.5]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.1.5.jar!/:6.1.5]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:975) ~[spring-beans-6.1.5.jar!/:6.1.5]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:962) ~[spring-context-6.1.5.jar!/:6.1.5]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:624) ~[spring-context-6.1.5.jar!/:6.1.5]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) ~[spring-boot-3.2.4.jar!/:3.2.4]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:456) ~[spring-boot-3.2.4.jar!/:3.2.4]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:334) ~[spring-boot-3.2.4.jar!/:3.2.4]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1354) ~[spring-boot-3.2.4.jar!/:3.2.4]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343) ~[spring-boot-3.2.4.jar!/:3.2.4]
at de.example.operator.OperatorApplication.main(OperatorApplication.java:10) ~[!/:0.0.1-SNAPSHOT]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
at org.springframework.boot.loader.launch.Launcher.launch(Launcher.java:91) ~[app.jar:0.0.1-SNAPSHOT]
at org.springframework.boot.loader.launch.Launcher.launch(Launcher.java:53) ~[app.jar:0.0.1-SNAPSHOT]
at org.springframework.boot.loader.launch.JarLauncher.main(JarLauncher.java:58) ~[app.jar:0.0.1-SNAPSHOT]
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [io.fabric8.kubernetes.client.KubernetesClient]: Factory method 'kubernetesClient' threw exception with message: class io.fabric8.kubernetes.client.okhttp.OkHttpClientImpl overrides final method io.fabric8.kubernetes.client.http.StandardHttpClient.close()V
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:177) ~[spring-beans-6.1.5.jar!/:6.1.5]
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:644) ~[spring-beans-6.1.5.jar!/:6.1.5]
... 25 common frames omitted
Caused by: java.lang.IncompatibleClassChangeError: class io.fabric8.kubernetes.client.okhttp.OkHttpClientImpl overrides final method io.fabric8.kubernetes.client.http.StandardHttpClient.close()V
at java.base/java.lang.ClassLoader.defineClass1(Native Method) ~[na:na]
at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1012) ~[na:na]
at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:150) ~[na:na]
at java.base/java.net.URLClassLoader.defineClass(URLClassLoader.java:524) ~[na:na]
at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:427) ~[na:na]
at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:421) ~[na:na]
at java.base/java.security.AccessController.doPrivileged(AccessController.java:712) ~[na:na]
at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:420) ~[na:na]
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:587) ~[na:na]
at org.springframework.boot.loader.net.protocol.jar.JarUrlClassLoader.loadClass(JarUrlClassLoader.java:104) ~[app.jar:0.0.1-SNAPSHOT]
at org.springframework.boot.loader.launch.LaunchedClassLoader.loadClass(LaunchedClassLoader.java:91) ~[app.jar:0.0.1-SNAPSHOT]
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520) ~[na:na]
at io.fabric8.kubernetes.client.okhttp.OkHttpClientBuilderImpl.completeBuild(OkHttpClientBuilderImpl.java:122) ~[kubernetes-httpclient-okhttp-6.9.2.jar!/:na]
at io.fabric8.kubernetes.client.okhttp.OkHttpClientBuilderImpl.initialBuild(OkHttpClientBuilderImpl.java:94) ~[kubernetes-httpclient-okhttp-6.9.2.jar!/:na]
at io.fabric8.kubernetes.client.okhttp.OkHttpClientBuilderImpl.build(OkHttpClientBuilderImpl.java:55) ~[kubernetes-httpclient-okhttp-6.9.2.jar!/:na]
at io.fabric8.kubernetes.client.okhttp.OkHttpClientBuilderImpl.build(OkHttpClientBuilderImpl.java:36) ~[kubernetes-httpclient-okhttp-6.9.2.jar!/:na]
at io.fabric8.kubernetes.client.KubernetesClientBuilder.getHttpClient(KubernetesClientBuilder.java:93) ~[kubernetes-client-api-6.11.0.jar!/:na]
at io.fabric8.kubernetes.client.KubernetesClientBuilder.build(KubernetesClientBuilder.java:78) ~[kubernetes-client-api-6.11.0.jar!/:na]
at io.javaoperatorsdk.operator.springboot.starter.OperatorAutoConfiguration.lambda$kubernetesClient$3(OperatorAutoConfiguration.java:61) ~[operator-framework-spring-boot-starter-5.4.1.jar!/:na]
at java.base/java.util.Optional.orElseGet(Optional.java:364) ~[na:na]
at io.javaoperatorsdk.operator.springboot.starter.OperatorAutoConfiguration.kubernetesClient(OperatorAutoConfiguration.java:60) ~[operator-framework-spring-boot-starter-5.4.1.jar!/:na]
at io.javaoperatorsdk.operator.springboot.starter.OperatorAutoConfiguration$$SpringCGLIB$$0.CGLIB$kubernetesClient$3(<generated>) ~[operator-framework-spring-boot-starter-5.4.1.jar!/:na]
at io.javaoperatorsdk.operator.springboot.starter.OperatorAutoConfiguration$$SpringCGLIB$$FastClass$$1.invoke(<generated>) ~[operator-framework-spring-boot-starter-5.4.1.jar!/:na]
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:258) ~[spring-core-6.1.5.jar!/:6.1.5]
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:331) ~[spring-context-6.1.5.jar!/:6.1.5]
at io.javaoperatorsdk.operator.springboot.starter.OperatorAutoConfiguration$$SpringCGLIB$$0.kubernetesClient(<generated>) ~[operator-framework-spring-boot-starter-5.4.1.jar!/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:140) ~[spring-beans-6.1.5.jar!/:6.1.5]
... 26 common frames omitted
我的 spring-boot 项目中目前有以下代码。
MyCustomResource.java
package de.example.operator;
import io.fabric8.kubernetes.client.CustomResource;
import io.fabric8.kubernetes.api.model.Namespaced;
import io.javaoperatorsdk.operator.api.ObservedGenerationAwareStatus;
import io.fabric8.kubernetes.model.annotation.Group;
import io.fabric8.kubernetes.model.annotation.Version;
@Group("de.example")
@Version("v1")
public class MyCustomResource extends CustomResource<MyCustomSpec, ObservedGenerationAwareStatus> implements Namespaced {
}
MyCustomResourceReconciler.java
package de.example.operator;
import io.javaoperatorsdk.operator.api.reconciler.Context;
import io.javaoperatorsdk.operator.api.reconciler.ControllerConfiguration;
import io.javaoperatorsdk.operator.api.reconciler.UpdateControl;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import io.javaoperatorsdk.operator.api.reconciler.Reconciler;
@Component
@ControllerConfiguration
public class MyCustomResourceReconciler implements Reconciler<MyCustomResource> {
private static final Logger log = LoggerFactory.getLogger(MyCustomResourceReconciler.class);
@Override
public UpdateControl<MyCustomResource> reconcile(MyCustomResource resource, Context<MyCustomResource> context) {
String message = resource.getSpec().getMessage();
log.info("Message from CR {}: {}", resource.getMetadata().getName(), message);
return UpdateControl.noUpdate();
}
}
MyCustomSpec.java
package de.example.operator;
public class MyCustomSpec {
private String message;
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}
OperatorApplication.java
package de.example.operator;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class OperatorApplication {
public static void main(String[] args) {
SpringApplication.run(OperatorApplication.class, args);
}
}
pom.xml
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>3.2.4</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>de.example</groupId>
<artifactId>operator</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>operator</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>17</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.javaoperatorsdk</groupId>
<artifactId>operator-framework-spring-boot-starter</artifactId>
<version>5.4.1</version>
</dependency>
<dependency>
<groupId>io.javaoperatorsdk</groupId>
<artifactId>operator-framework-spring-boot-starter-test</artifactId>
<version>5.4.1</version>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j2-impl</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>io.fabric8</groupId>
<artifactId>crd-generator-apt</artifactId>
<version>6.11.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk18on</artifactId>
<version>1.77</version>
</dependency>
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcpkix-jdk18on</artifactId>
<version>1.77</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
也许有人能看出问题出在哪里？
问题是最新版本的operatorsdk没有使用最新版本的fabric8。将我的 crd 生成器的依赖项版本更改为 6.9.2（如操作员 SDK 的依赖项树中所示）后，代码运行完美。