为Kubernetes设置Spring Cloud数据流服务器

Question

我按照http://docs.spring.io/spring-cloud-dataflow-server-kubernetes/docs/current-SNAPSHOT/reference/htmlsingle/上给出的使用kubectl的安装步骤操作。

虽然MySQL/ Redis/Metrics Collector部署和运行良好，但在部署scdf-server时，我得到一个异常，日志中只有以下堆栈跟踪。我在文档中找不到任何证书/fabric8 8相关的配置，如果我遗漏了什么，有什么建议吗？

Kubernetes集群= v1.9.2

scdf-kubernetes =最新快照

日志：

16:30:28.362 [main] DEBUG io.fabric8.kubernetes.client.Config - Trying to configure client from Kubernetes config...
16:30:28.374 [main] DEBUG io.fabric8.kubernetes.client.Config - Did not find Kubernetes config at: [/root/.kube/config]. Ignoring.
16:30:28.374 [main] DEBUG io.fabric8.kubernetes.client.Config - Trying to configure client from service account...
16:30:28.375 [main] DEBUG io.fabric8.kubernetes.client.Config - Found service account ca cert at: [/var/run/secrets/kubernetes.io/serviceaccount/ca.crt].
16:30:28.452 [main] DEBUG io.fabric8.kubernetes.client.Config - Found service account token at: [/var/run/secrets/kubernetes.io/serviceaccount/token].
16:30:28.452 [main] DEBUG io.fabric8.kubernetes.client.Config - Trying to configure client namespace from Kubernetes service account namespace path...
16:30:28.452 [main] DEBUG io.fabric8.kubernetes.client.Config - Found service account namespace at: [/var/run/secrets/kubernetes.io/serviceaccount/namespace].
Exception in thread "main" java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48)
        at org.springframework.boot.loader.Launcher.launch(Launcher.java:87)
        at org.springframework.boot.loader.Launcher.launch(Launcher.java:50)
        at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:51)
Caused by: java.lang.IllegalArgumentException: Cannot instantiate interface org.springframework.context.ApplicationContextInitializer : org.springframework.cloud.kubernetes.profile.KubernetesApplicationContextInitializer
        at org.springframework.boot.SpringApplication.createSpringFactoriesInstances(SpringApplication.java:413)
        at org.springframework.boot.SpringApplication.getSpringFactoriesInstances(SpringApplication.java:392)
        at org.springframework.boot.SpringApplication.getSpringFactoriesInstances(SpringApplication.java:383)
        at org.springframework.boot.SpringApplication.initialize(SpringApplication.java:249)
        at org.springframework.boot.SpringApplication.<init>(SpringApplication.java:225)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107)
        at org.springframework.cloud.dataflow.server.kubernetes.KubernetesDataFlowServer.main(KubernetesDataFlowServer.java:33)
        ... 8 more
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.cloud.kubernetes.profile.KubernetesApplicationContextInitializer]: Constructor threw exception; nested exception is io.fabric8.kubernetes.client.KubernetesClientException: An error has occurred.
        at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:154)
        at org.springframework.boot.SpringApplication.createSpringFactoriesInstances(SpringApplication.java:409)
        ... 15 more
Caused by: io.fabric8.kubernetes.client.KubernetesClientException: An error has occurred.
        at io.fabric8.kubernetes.client.KubernetesClientException.launderThrowable(KubernetesClientException.java:62)
        at io.fabric8.kubernetes.client.KubernetesClientException.launderThrowable(KubernetesClientException.java:53)
        at io.fabric8.kubernetes.client.utils.HttpClientUtils.createHttpClient(HttpClientUtils.java:168)
        at io.fabric8.kubernetes.client.BaseClient.<init>(BaseClient.java:55)
        at io.fabric8.kubernetes.client.BaseClient.<init>(BaseClient.java:47)
        at io.fabric8.kubernetes.client.DefaultKubernetesClient.<init>(DefaultKubernetesClient.java:70)
        at org.springframework.cloud.kubernetes.profile.KubernetesApplicationContextInitializer.<init>(KubernetesApplicationContextInitializer.java:35)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:142)
        ... 16 more
Caused by: java.security.cert.CertificateException: Could not parse certificate: java.io.IOException: Empty input
        at sun.security.provider.X509Factory.engineGenerateCertificate(X509Factory.java:110)
        at java.security.cert.CertificateFactory.generateCertificate(CertificateFactory.java:339)
        at io.fabric8.kubernetes.client.internal.CertUtils.createTrustStore(CertUtils.java:93)
        at io.fabric8.kubernetes.client.internal.CertUtils.createTrustStore(CertUtils.java:71)
        at io.fabric8.kubernetes.client.internal.SSLUtils.trustManagers(SSLUtils.java:114)
        at io.fabric8.kubernetes.client.internal.SSLUtils.trustManagers(SSLUtils.java:93)
        at io.fabric8.kubernetes.client.utils.HttpClientUtils.createHttpClient(HttpClientUtils.java:63)
        ... 25 more
Caused by: java.io.IOException: Empty input
        at sun.security.provider.X509Factory.engineGenerateCertificate(X509Factory.java:106)
        ... 31 more

Answer 1

目前还不清楚您是否将其部署到启用了RBAC的集群中。如果您确实在RBAC集群上，则必须在部署SCDF服务器之前添加“角色”和“角色绑定”。您会注意到参考指南中的以下说明。

最新版本的kubernetes在api服务器上启用了基于角色的访问控制。如果您的目标平台启用了RBAC，那么在部署数据流服务器之前，您必须让集群管理员为您创建角色和角色绑定。它们将数据流服务帐户与其运行所需的角色相关联。