Jenkins kubernetes 插件不工作 [英] Jenkins kubernetes plugin not working

问题描述

我正在尝试使用 jenkins-kubernetes 插件设置 Jenkins Dynamic slaves 创建.

我的 jenkins 在 K8s 集群之外运行.

链接:

并且连接成功.

然后我使用 pod 模板创建了一个作业:

问题从这里开始:<强> 1.当我最初运行此作业时，它会运行并且我的 pod 内的 jenkins 从容器无法连接并抛出:

我已启用 JNLP 端口(50000) 不确定它是否是正确的端口，即使在 Jenkins 中使用随机选项进行测试也没有任何效果.

<强>2.现在我放弃了这个詹金斯工作并再次运行它说:

 由用户 Vaibhav Jain 发起[管道] podTemplate[管道] {[管道] 节点仍在等待安排任务Jenkins 没有标签 defaultlabel

并且在 kubernetes 中没有启动任何 pod.这很奇怪.

我不确定我做错了什么.需要帮助！

解决方案

建议你在 kubernetes 中使用凭证，而不是使用证书，通过创建一个 serviceAccount:

---api版本:v1种类:服务账户元数据:姓名:詹金斯---种类:角色api版本:rbac.authorization.k8s.io/v1beta1元数据:姓名:詹金斯规则:- apiGroups:["]资源:[豆荚"]动词:["create","delete","get","list","patch","update","watch"]- apiGroups:["]资源:[pods/exec"]动词:["create","delete","get","list","patch","update","watch"]- apiGroups:["]资源:[pods/日志"]动词:["get","list","watch"]- apiGroups:["]资源:[秘密"]动词:[得到"]---api版本:rbac.authorization.k8s.io/v1beta1种类:角色绑定元数据:姓名:詹金斯角色参考:apiGroup:rbac.authorization.k8s.io种类:角色姓名:詹金斯主题:- 种类:ServiceAccount姓名:詹金斯

并使用该 serviceAccount 部署 jenkins:

apiVersion: extensions/v1beta1种类:部署元数据:标签:应用程序:詹金斯姓名:詹金斯规格:复制品:1选择器:匹配标签:应用程序:詹金斯模板:元数据:标签:应用程序:詹金斯规格:服务帐户名称:詹金斯……

我给你看我的 Kubernetes 插件截图(注意 JNLP 端口的 Jenkins 隧道，'jenkins' 是我的 kubernetes 服务的名称):

对于凭据:

然后填写文件(ID将自动生成，描述将显示在凭据列表框中)，但请确保如我之前所说在kubernetes中创建了serviceAccount:

我的说明是针对 Kubernetes 中的 Jenkins 大师的.如果您希望它在集群之外(但在内部)，我认为您必须使用简单的登录/密码凭据.

关于你的最后一个错误，它似乎是主机解析错误:从服务器无法解析你的主机.

希望对你有帮助.

I am trying to setup Jenkins Dynamic slaves creation using jenkins-kubernetes plugin.

My jenkins is running outside K8s Cluster.

Link: https://github.com/jenkinsci/kubernetes-plugin

My jenkins version is 2.60.2 and Kubernetes plugin version is 1.1.2

I followed the steps mention on the readme and successfully setup the connection.

My setting looks like:

And connection is successful.

Then I created a job with pod template :

Here starts the problem: 1. When I run this job initially it runs and jenkins slave container inside my pod not able to connect and throws:

I have enabled JNLP port(50000) not sure if it is the right port even tested with random option in Jenkins nothing worked.

2. Now I discarded this jenkins job and re run again it says:

 Started by user Vaibhav Jain
[Pipeline] podTemplate
[Pipeline] {
[Pipeline] node
Still waiting to schedule task
Jenkins doesn’t have label defaultlabel

and no pod is getting started in kubernetes. This is weird.

I am not sure what I am doing wrong. Need help!

解决方案

Instead of using certificates, I suggest you to use credentials in kubernetes, by creating a serviceAccount:

---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: jenkins
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: jenkins
rules:
- apiGroups: [""]
  resources: ["pods"]
  verbs: ["create","delete","get","list","patch","update","watch"]
- apiGroups: [""]
  resources: ["pods/exec"]
  verbs: ["create","delete","get","list","patch","update","watch"]
- apiGroups: [""]
  resources: ["pods/log"]
  verbs: ["get","list","watch"]
- apiGroups: [""]
  resources: ["secrets"]
  verbs: ["get"]
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: RoleBinding
metadata:
  name: jenkins
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: jenkins
subjects:
- kind: ServiceAccount
  name: jenkins

and deploying jenkins using that serviceAccount:

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  labels:
    app: jenkins
  name: jenkins
spec:
  replicas: 1
  selector:
    matchLabels:
      app: jenkins
  template:
    metadata:
      labels:
        app: jenkins
    spec:           
      serviceAccountName: jenkins 
....

I show you my screenshots for Kubernetes plugin (note Jenkins tunnel for the JNLP port, 'jenkins' is the name of my kubernetes service):

For credentials:

Then fill the fileds (ID will be autogenerated, description will be shown in credentials listbox), but be sure to have created serviceAccount in kubernetes as I said before:

My instructions are for the Jenkins master inside kubernetes. If you want it outside the cluster (but slaves inside) I think you have to use simple login/password credentials.

For what concerns your last error, it seems to be a host resolution error: the slave cannot resolve your host.

I hope it helps you.

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