在AWS EKS上使用Kubernetes Auth方法部署Hashicorp Vault时出现证书错误

Question

我正在尝试使用Kubernetes Auth方法在AWS EKS上部署Hashicorp Vault。

Hashicorp身份验证方法：https://www.vaultproject.io/docs/auth/kubernetes.html

使用的过程，派生自CoreOS存储库运算符。尽管我实际上并没有使用他们的运算符：https://github.com/coreos/vault-operator/blob/master/doc/user/kubernetes-auth-backend.md

下面是该过程的使用摘要以及一些附加内容。基本上，我在按照所需的步骤尝试实际登录vault时收到一个证书错误。任何帮助都是非常感谢的。

创建tokenreview的服务帐户和clusterrolebinding：

$kubectl -n default create serviceaccount vault-tokenreview

$kubectl -n default create -f example/k8s_auth/vault-tokenreview-binding.yaml

    Contents of vault-tokenreview-binding.yaml file
    =========================================
    apiVersion: rbac.authorization.k8s.io/v1beta1
    kind: ClusterRoleBinding
    metadata:
      name: vault-tokenreview-binding
      namespace: default
    roleRef:
      apiGroup: rbac.authorization.k8s.io
      kind: ClusterRole
      name: system:auth-delegator
    subjects:
    - kind: ServiceAccount
      name: vault-tokenreview
      namespace: default

开启文件库认证，将Kubernetes集群添加到文件库：

$SECRET_NAME=$(kubectl -n default get serviceaccount vault-tokenreview -o jsonpath='{.secrets[0].name}')
$TR_ACCOUNT_TOKEN=$(kubectl -n default get secret ${SECRET_NAME} -o jsonpath='{.data.token}' | base64 --decode)

$vault auth-enable kubernetes

$vault write auth/kubernetes/config kubernetes_host=XXXXXXXXXX kubernetes_ca_cert=@ca.crt token_reviewer_jwt=$TR_ACCOUNT_TOKEN

    Contents of ca.crt file
    NOTE: I retrieved the certificate from AWS EKS console. Which
          is shown in the "certificate authority" field in 
          base64 format. I base64 decoded it and placed it here
    =================
    -----BEGIN CERTIFICATE-----
    * encoded entry *
    -----END CERTIFICATE-----

创建vault策略和角色：

$vault write sys/policy/demo-policy policy=@example/k8s_auth/policy.hcl

    Contents of policy.hcl file
    =====================
    path "secret/demo/*" {
      capabilities = ["create", "read", "update", "delete", "list"]
    }

$vault write auth/kubernetes/role/demo-role \
    bound_service_account_names=default \
    bound_service_account_namespaces=default \
    policies=demo-policy \
    ttl=1h

尝试使用上一步中创建的服务帐户登录vault：

$SECRET_NAME=$(kubectl -n default get serviceaccount default -o jsonpath='{.secrets[0].name}')
$DEFAULT_ACCOUNT_TOKEN=$(kubectl -n default get secret ${SECRET_NAME} -o jsonpath='{.data.token}' | base64 --decode)

$vault write auth/kubernetes/login role=demo-role jwt=${DEFAULT_ACCOUNT_TOKEN}

    Error writing data to auth/kubernetes/login: Error making API request.

    URL: PUT http://localhost:8200/v1/auth/kubernetes/login
    Code: 500. Errors:

    * Post https://XXXXXXXXX.sk1.us-west-2.eks.amazonaws.com/apis/authentication.k8s.io/v1/tokenreviews: x509: certificate signed by unknown authority

Answer 1

您的kubernetes url https://XXXXXXXXX.sk1.us-west-2.eks.amazonaws.com具有错误的证书尝试添加-tls-skip-verify

vault write -tls-skip-verify auth/kubernetes/login .......