如何使用Google IAP对JupyterHub进行身份验证？

Question

我为JupyterHub应用程序配置了Google的Identity-Aware Proxy，并希望使用它来验证我的用户。我该怎么做？

Answer 1

Google将签名的JWT标头传递给前面带有IAP的应用程序，如Securing your app with signed headers中所述。您可以使用mogthesprog/jwtauthenticator在JupyterHub中启用基于JWT的身份验证。

通过jupyterhub_config.py

进行配置

一旦jupyterhub-jwtauthenticator安装在JupyterHub服务器上，请添加以下配置：

jupyterhub_config.py

c.JupyterHub.authenticator_class = 'jwtauthenticator.jwtauthenticator.JSONWebTokenAuthenticator'
c.JSONWebTokenAuthenticator.header_name = 'x-goog-iap-jwt-assertion'
c.JSONWebTokenAuthenticator.header_is_authorization = False
c.JSONWebTokenAuthenticator.expected_audience = '/projects/PROJECT_NUMBER/global/backendServices/SERVICE_ID`
c.JSONWebTokenAuthenticator.username_claim_field = 'email'

# Retrieved from https://www.gstatic.com/iap/verify/public_key
c.JSONWebTokenAuthenticator.secret = """
{
   "2nMJtw" : "-----BEGIN PUBLIC KEY-----\nMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAE9e1x7YRZg53A5zIJ0p2ZQ9yTrgPL\nGIf4ntOk+4O2R2+ryIObueyenPXE92tYG1NlKjDNyJLc7tsxi0UUnyxpig==\n-----END PUBLIC KEY-----\n",
   "6BEeoA" : "-----BEGIN PUBLIC KEY-----\nMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAElmi1hJdqtbvdX1INOf5B9dWvkydY\noowHUXiw8ELWzk/YHESNr8vXQoyOuLOEtLZeCQbFkeLUqxYp1sTArKNu/A==\n-----END PUBLIC KEY-----\n",
   "FAWt5w" : "-----BEGIN PUBLIC KEY-----\nMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAE8auUAdTS54HmUuIabrTKvWawxmbs\n81kdbzQMV/Tae0EhLgin8qnJ4lklJrxEzksXg5OtBuzE62DIj+CePN20Pg==\n-----END PUBLIC KEY-----\n",
   "LYyP2g" : "-----BEGIN PUBLIC KEY-----\nMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAESlXFFkJ3JxMsXyXNrqzE3ozl/091\n3PmNbccLLWfeQFUYtJqGtl8ESuYxRwc/QwZp5Wcl0HCq6GuFDx4/Tk18Ig==\n-----END PUBLIC KEY-----\n",
   "f9R3yg" : "-----BEGIN PUBLIC KEY-----\nMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAESqCmEwytkqG6tL6a2GTQGmSNI4jH\nYo5MeDUs7DpETVhCXXLIFrLg2sZvNqw8SGnnonLoeqgOSqRdjJBGt4I6jQ==\n-----END PUBLIC KEY-----\n"
}
"""

通过zero-to-jupyterhub-k8s

进行配置

如果您使用zero-to-jupyterhub-k8s在Kubernetes集群中配置JupyterHub，则首先需要将jupyterhub-jwtauthenticator程序包烘烤到中心映像中。

在目录中包含以下Dockerfile和cloudbuild.yaml，使用适当的项目执行gcloud builds submit --config cloudbuild.yaml .。

Dockerfile

FROM jupyterhub/k8s-hub:0.7.0

RUN pip3 install --no-cache-dir jupyterhub-jwtauthenticator

cloudbuild.yaml

steps:
- name: 'gcr.io/cloud-builders/docker'
  args: [ 'pull', 'docker.io/jupyterhub/k8s-hub:0.7.0' ]
- name: 'gcr.io/cloud-builders/docker'
  args: [ 'build', '-t', 'gcr.io/$PROJECT_ID/k8s-hub', '.' ]
images:
- 'gcr.io/$PROJECT_ID/k8s-hub'

values.yaml

hub:
  image:
    name: gcr.io/<project>/k8s-hub
    tag: latest
auth:
  type: custom
  custom:
    className: 'jwtauthenticator.jwtauthenticator.JSONWebTokenAuthenticator'
    config:
      header_name: x-goog-iap-jwt-assertion
      header_is_authorization: false
      expected_audience: '/projects/PROJECT_NUMBER/global/backendServices/SERVICE_ID'
      username_claim_field: email
      # Retrieved from https://www.gstatic.com/iap/verify/public_key
      secret: |
        {
           "2nMJtw" : "-----BEGIN PUBLIC KEY-----\nMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAE9e1x7YRZg53A5zIJ0p2ZQ9yTrgPL\nGIf4ntOk+4O2R2+ryIObueyenPXE92tYG1NlKjDNyJLc7tsxi0UUnyxpig==\n-----END PUBLIC KEY-----\n",
           "6BEeoA" : "-----BEGIN PUBLIC KEY-----\nMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAElmi1hJdqtbvdX1INOf5B9dWvkydY\noowHUXiw8ELWzk/YHESNr8vXQoyOuLOEtLZeCQbFkeLUqxYp1sTArKNu/A==\n-----END PUBLIC KEY-----\n",
           "FAWt5w" : "-----BEGIN PUBLIC KEY-----\nMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAE8auUAdTS54HmUuIabrTKvWawxmbs\n81kdbzQMV/Tae0EhLgin8qnJ4lklJrxEzksXg5OtBuzE62DIj+CePN20Pg==\n-----END PUBLIC KEY-----\n",
           "LYyP2g" : "-----BEGIN PUBLIC KEY-----\nMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAESlXFFkJ3JxMsXyXNrqzE3ozl/091\n3PmNbccLLWfeQFUYtJqGtl8ESuYxRwc/QwZp5Wcl0HCq6GuFDx4/Tk18Ig==\n-----END PUBLIC KEY-----\n",
           "f9R3yg" : "-----BEGIN PUBLIC KEY-----\nMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAESqCmEwytkqG6tL6a2GTQGmSNI4jH\nYo5MeDUs7DpETVhCXXLIFrLg2sZvNqw8SGnnonLoeqgOSqRdjJBGt4I6jQ==\n-----END PUBLIC KEY-----\n"
        }

自动获取IAP公钥

如果您不想将IAP JWT令牌的公钥烘烤到您的配置中，则可以在运行时通过jupyterhub_config.py或在头盔图表中以extraConfig的方式检索它们。

jupyterhub_config.py

from urllib import request
c.JSONWebTokenLocalAuthenticator.secret = request.urlopen('https://www.gstatic.com/iap/verify/public_key').read()

对于zero-to-jupyterhub-k8s：

values.yaml

hub:
  extraConfig:
    config-jwtauthenticator: |
      from urllib import request
      c.JSONWebTokenLocalAuthenticator.secret = request.urlopen('https://www.gstatic.com/iap/verify/public_key').read()