Question

我正在centos7上运行kubernetes 1.16.2的本地实例。我已经安装了证书管理器，dex和舷梯，并且可以正常工作。我遇到的问题是kubectl。

所以我使用letencrypt certs在其自己的入口上运行dex，并在其后端的ldap上将其运行到我们的本地authn。和舷梯配置为使用此dex实例。

我将一个letencrypt.pem CA收集在一起

curl https://letsencrypt.org/certs/isrgrootx1.pem.txt > isrgrootx1.pem.txt
curl https://letsencrypt.org/certs/lets-encrypt-x3-cross-signed.pem.txt > lets-encrypt-x3-cross-signed.pem.txt
cat isrgrootx1.pem.txt lets-encrypt-x3-cross-signed.pem.txt > /etc/pki/ca-trust/source/anchors/letsencrypt.pem

dex，配置了这些额外的nginx入口注释，

cert-manager.io/cluster-issuer: letsencrypt-prod
nginx.ingress.kubernetes.io/backend-protocol: HTTPS
nginx.ingress.kubernetes.io/force-ssl-redirect: "true"

似乎可以正常工作：

$ curl -v -L --cacert /etc/pki/ca-trust/source/anchors/letsencrypt.pem   https://dex.mydomain.com/.well-known/openid-configuration
* About to connect() to dex.mydomain.com port 443 (#0)
*   Trying x.y.z.a...
* Connected to dex.mydomain.com (x.y.z.a) port 443 (#0)
* Initializing NSS with certpath: sql:/etc/pki/nssdb
*   CAfile: /etc/pki/ca-trust/source/anchors/letsencrypt.pem
  CApath: none
* SSL connection using TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
* Server certificate:
*   subject: CN=dex.mydomain.com
*   start date: Oct 27 04:33:31 2019 GMT
*   expire date: Jan 25 04:33:31 2020 GMT
*   common name: dex.mydomain.com
*   issuer: CN=Let's Encrypt Authority X3,O=Let's Encrypt,C=US
> GET /.well-known/openid-configuration HTTP/1.1
> User-Agent: curl/7.29.0
> Host: dex.mydomain.com
> Accept: */*
>
< HTTP/1.1 200 OK
< Server: openresty/1.15.8.2
< Date: Sun, 27 Oct 2019 06:55:30 GMT
< Content-Type: application/json
< Content-Length: 774
< Connection: keep-alive
< Vary: Accept-Encoding
< Strict-Transport-Security: max-age=15724800; includeSubDomains
<
{
  "issuer": "https://dex.mydomain.com",
  "authorization_endpoint": "https://dex.mydomain.com/auth",
  "token_endpoint": "https://dex.mydomain.com/token",
  "jwks_uri": "https://dex.mydomain.com/keys",
  "userinfo_endpoint": "https://dex.mydomain.com/userinfo",
  "response_types_supported": [
    "code"
  ],
  "subject_types_supported": [
    "public"
  ],
  "id_token_signing_alg_values_supported": [
    "RS256"
  ],
  "scopes_supported": [
    "openid",
    "email",
    "groups",
    "profile",
    "offline_access"
  ],
  "token_endpoint_auth_methods_supported": [
    "client_secret_basic"
  ],
  "claims_supported": [
    "aud",
    "email",
    "email_verified",
    "exp",
    "iat",
    "iss",
    "locale",
    "name",
    "sub"
  ]
* Connection #0 to host dex.mydomain.com left intact

然后我通过添加以下容器在我的kubernetes主节点上编辑我的kubeapi清单。命令行：

- --oidc-issuer-url=https://dex.mydomain.com
- --oidc-ca-file=/etc/pki/ca-trust/source/anchors/letsencrypt.pem
- --oidc-client-id=oidc-auth-client
- --oidc-username-claim=email
- --oidc-groups-claim=groups

我等待kubernetes主Pod重新启动。一切恢复正常。并且我再次检查/etc/pki/ca-trust/source/anchors/letsencrypt.pem窗格中是否可以访问kube-apiserver-k8s。

我在没有trustedCAPath的情况下配置舷梯，然后继续进入舷梯入口，并看到dex身份验证页面。我选择LDAP，输入我的企业帐户详细信息，然后舷梯继续执行预期的操作：

echo "-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
" \ > ca-k8s-cluster.pem
kubectl config set-cluster k8s-cluster --server=https://k8s-login.mydomain.com/ --certificate-authority=ca-k8s-cluster.pem --embed-certs
kubectl config set-credentials me@mydomain.com  \
    --auth-provider=oidc  \
    --auth-provider-arg='idp-issuer-url=https://dex.mydomain.com'  \
    --auth-provider-arg='client-id=oidc-auth-client'  \
    --auth-provider-arg='client-secret=wqTkyx6vtpH56FI9K3DE+IaFuwTVToJ5f3CBAuidTtU=' \
    --auth-provider-arg='refresh-token=Chl2bWtrYTJsdnlvZWt4dW9raGc3aGxrcnpxEhlvdmlwcWZ2c3dsZGQ0d3dzd3M3a2ZmNHVq' \
    --auth-provider-arg='id-token=eyJhbGciOiJSUzI1NiIsImtpZCI6ImFlZDFlMzYxY2NmMjY4NzI3MDVjYTBmNDcxYzFlMDgzZGQ1MjA4YWUifQ.eyJpc3MiOiJodHRwczovL2RleC5zbGFjLnN0YW5mb3JkLmVkdSIsInN1YiI6IkNnTjVkR3dTQkd4a1lYQSIsImF1ZCI6Im9pZGMtYXV0aC1jbGllbnQiLCJleHAiOjE1NzIyNDQ3ODYsImlhdCI6MTU3MjE1ODM4NiwiYXRfaGFzaCI6IlVEdUxfNFdGb3JTRTZhSzNzY0wtQ0EiLCJlbWFpbCI6Inl0bEBzbGFjLnN0YW5mb3JkLmVkdSIsImVtYWlsX3ZlcmlmaWVkIjp0cnVlLCJuYW1lIjoiWWVlIFRpbmcgTGkifQ.Qyjf_IXxyHX7-Z8uLHNxCfC7ne0fZfCk4XoyVD_tom-b9bLf72-p1IxW8HPLo6QgCcnH9QFw3X4XKpFU7sjXZTwu59CxkCfQSG1XKHIKrzUbX7g3c4ZX1b7r7tTnAmGXTj-nG15crYnBcJjgFJRac_qKjqJUBED1_RUjKXzjpQaSlhmsnu8roRVcUJvHnsORHZlSF2kOYlLFlW2fi8cYa3JXISBhY2vzUYJmwopFF8LP3C_GrzrjEsql0984yFDHYNGKtnVhBRCFDBEmBEc9OgxEi8OXuN93pKu-ApNiagaoVBprgWzgl2eijogkCrHn_T7NcXBpx211V1YzXs_-_w'
kubectl config set-context k8s-cluster --cluster=k8s-cluster --user=me@mydomain.com
kubectl config use-context k8s-cluster
rm ca-k8s-cluster.pem

我忠实地将其粘贴到终端中。但是，当我尝试（不为自己设置任何RBAC角色）时，我得到了

$ kubectl  get pods
Unable to connect to the server: x509: certificate signed by unknown authority

我也尝试从kubeapi中删除--oidc-ca-file，但出现相同的错误。

我也尝试添加

--auth-provider-arg='idp-certificate-authority=/etc/pki/ca-trust/source/anchors/letsencrypt.pem'

向我的kubectl config获取凭据-但无济于事。

我也尝试过：

$ kubectl --insecure-skip-tls-verify=true get pods
error: yaml: line 13: mapping values are not allowed in this context

我在kupeapi日志中看不到任何异常，并且我完全不知所措。有什么建议吗？

Answer 1

grrr ....我解决了。其全部内容：

kubectl config set-cluster k8s-cluster --server=https://k8s-login.mydomain.com/ --certificate-authority=ca-k8s-cluster.pem --embed-certs

有问题的--server应该是kubeapi端点，而不是我的舷梯服务器！我追溯到我的apiServerURL在舷梯配置图中的重复。

无法使kubectl针对dex和舷梯进行身份验证

1 个答案: