kubectl 没有选择正确的 kubeconfig

Question

请在下面找到我正在执行的操作序列，以针对 kubectl 进行授权和身份验证，以便能够在 EKS 集群上执行部署

1. SAML 登录
2. 从 Artifactory 下载正确的 kubeconfig
3. 使用下载的 kubeconfig #这个阶段出现问题！

Jenkins执行日志如下：

Logged in as: arn:aws:sts::XXXXXXXXXXXX:assumed-role/dev-role/testusername

Your new access key pair has been stored in the AWS configuration
Note that it will expire at 2021-02-08 15:18:59 +0000 UTC
To use this credential, call the AWS CLI with the --profile option (e.g. aws --profile saml ec2 describe-instances).
[Pipeline] }
[Pipeline] // stage
[Pipeline] stage
[Pipeline] { (Compose Source Structure)
[Pipeline] sh
+ set -x
+ cat
+ kubectl config view
apiVersion: v1
clusters: []
contexts: []
current-context: ""
kind: Config
preferences: {}
users: []
+ rm -vf config
+ wget -nv --no-check-certificate https://testcompanyname.com.au/testrepo/jenkins/eks-nonprod-black-config
2021-02-08 14:19:35 URL:https://testcompanyname.com.au/testrepo/jenkins/eks-nonprod-black-config [2383/2383] -> "eks-nonprod-black-config" [1]
+ mv eks-nonprod-black-config config
+ pwd
/home/jenkins/agent/workspace/k8s-sync-from-cluster
+ ls -lrt
total 11640
-rwxrwxr-x    1 jenkins  jenkins   11801948 Feb 28  2017 saml2aws
-rw-r--r--    1 jenkins  jenkins       2383 Jan 22 03:03 config
drwxr-xr-x    2 jenkins  jenkins       4096 Feb  8 14:19 vars
drwxr-xr-x    3 jenkins  jenkins       4096 Feb  8 14:19 test
drwxr-xr-x    3 jenkins  jenkins       4096 Feb  8 14:19 src
-rw-r--r--    1 jenkins  jenkins        153 Feb  8 14:19 settings.gradle
drwxr-xr-x    9 jenkins  jenkins       4096 Feb  8 14:19 resources
drwxr-xr-x    5 jenkins  jenkins       4096 Feb  8 14:19 pipelines
-rw-r--r--    1 jenkins  jenkins       2841 Feb  8 14:19 gradlew.bat
-rwxr-xr-x    1 jenkins  jenkins       5916 Feb  8 14:19 gradlew
drwxr-xr-x    3 jenkins  jenkins       4096 Feb  8 14:19 gradle
drwxr-xr-x    3 jenkins  jenkins       4096 Feb  8 14:19 csa-kubernetes-env
-rw-r--r--    1 jenkins  jenkins       1532 Feb  8 14:19 build.gradle
-rw-r--r--    1 jenkins  jenkins        208 Feb  8 14:19 README.md
+ cat config
apiVersion: v1
clusters:
- cluster:
    certificate-authority-data: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
    server: https://xxxxxxxxxxxxxxxxxxxxxxxxxx.gr7.ap-southeast-2.eks.amazonaws.com
  name: arn:aws:eks:ap-southeast-2:XXXXXXXXXXXX:cluster/test-eks
contexts:
- context:
    cluster: arn:aws:eks:ap-southeast-2:XXXXXXXXXXXX:cluster/test-eks
    user: arn:aws:eks:ap-southeast-2:XXXXXXXXXXXX:cluster/test-eks
  name: arn:aws:eks:ap-southeast-2:XXXXXXXXXXXX:cluster/test-eks
current-context: arn:aws:eks:ap-southeast-2:XXXXXXXXXXXX:cluster/test-eks
kind: Config
preferences: {}
users:
- name: arn:aws:eks:ap-southeast-2:XXXXXXXXXXXX:cluster/test-eks
  user:
    exec:
      apiVersion: client.authentication.k8s.io/v1alpha1
      args:
      - --region
      - ap-southeast-2
      - eks
      - get-token
      - --cluster-name
      - test-eks
      command: aws
      env:
      - name: AWS_PROFILE
        value: saml
+ kubectl config view --kubeconfig ./config
apiVersion: v1
clusters:
- cluster:
    certificate-authority-data: REDACTED
    server: https://7FE00E432DC6BEB1EB17DEF18DB1B926.gr7.ap-southeast-2.eks.amazonaws.com
  name: arn:aws:eks:ap-southeast-2:XXXXXXXXXXXX:cluster/test-eks
contexts:
- context:
    cluster: arn:aws:eks:ap-southeast-2:XXXXXXXXXXXX:cluster/test-eks
    user: arn:aws:eks:ap-southeast-2:XXXXXXXXXXXX:cluster/test-eks
  name: arn:aws:eks:ap-southeast-2:XXXXXXXXXXXX:cluster/test-eks
current-context: arn:aws:eks:ap-southeast-2:XXXXXXXXXXXX:cluster/test-eks
kind: Config
preferences: {}
users:
- name: arn:aws:eks:ap-southeast-2:XXXXXXXXXXXX:cluster/test-eks
  user: {}
+ kubectl get namespaces --kubeconfig ./config
Please enter Username: Please enter Username: Please enter Username: error: EOF
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
ERROR: script returned exit code 1
Finished: FAILURE

因此，正如您所看到的，问题是当我 cat 文件时有用户信息，但是当我运行 kubectl 时，它不应该挑战凭据。

Answer 1

@learner 我知道您已经通过将kubectl 升级到更新版本解决了您的问题。
此外，我想提供更多关于 Kubernetes 组件的版本以及它们之间的关系的信息。

---

Kubernetes version skew support policy 描述了各种 Kubernetes 组件之间支持的最大版本偏差。您可以在version-skew-policy 文档中找到更多信息。

我将描述一般规则来说明它是如何工作的。

假设kube-apiserver 的版本为1.n。在这种情况下：

• kubelet 和 kube-proxy 在 1.n、1.(n-1) 和 1.(n-2).
• kube-controller-manager、kube-scheduler 和 1.n 和 1.(n-1) 支持 cloud-controller-manager。
• 1.(n+1)、1.n 和 1.(n-1) 支持 kubectl。
  
  

注意：CoreDNS 和 etcd 是独立的项目，并且有各自的版本。

Answer 2

这听起来可能很愚蠢，但问题出在 kubectl 客户端版本上。

由于我使用的是 kubectl 1.9 所面临的问题，升级到最新解决了该问题。