michaeljmarshall commented on issue #19771:
URL: https://github.com/apache/pulsar/issues/19771#issuecomment-1478690347
For future reference, I checked out some implementations, and below are the
claims sections of the JWT created when you specify the expiration and not the
audience.
They all appear the same, which is good. I haven't found any k8s
documentation that they will appear this way, but it makes sense. One challenge
we'll face by integrating with k8s is making sure that we only give permission
to the correct pods. This might be challenging. I'll be thinking about this
some more.
A sample token from Azure Kubernetes service:
```json
{
"aud": [
"https://some.info.azmk8s.io";,
"\"some.info.azmk8s.io\""
],
"exp": 1679444659,
"iat": 1679437459,
"iss": "https://some.info.azmk8s.io";,
"kubernetes.io": {
"namespace": "michael-test",
"pod": {
"name": "nginx",
"uid": "6ad4f05d-64a9-44c7-9acd-fa2f34eb6c96"
},
"serviceaccount": {
"name": "default",
"uid": "4e618f02-2ce3-45a4-b623-fcc806a16cdf"
}
},
"nbf": 1679437459,
"sub": "system:serviceaccount:michael-test:default"
}
```
Sample from EKS:
```json
{
"aud": [
"https://kubernetes.default.svc";
],
"exp": 1710969822,
"iat": 1679433822,
"iss": "https://oidc.eks.us-east-2.amazonaws.com/id/some-id";,
"kubernetes.io": {
"namespace": "astra-streaming-cp",
"pod": {
"name": "nginx",
"uid": "fbac8f9e-a47d-4ad7-a8f0-cc9a65d1331c"
},
"serviceaccount": {
"name": "default",
"uid": "5964f9d3-3dce-467c-8dbe-d0f463063d7a"
},
"warnafter": 1679437429
},
"nbf": 1679433822,
"sub": "system:serviceaccount:michael-test:default"
}
```
GKE:
```json
{
"aud": [
"https://container.googleapis.com/v1/projects/some-info";
],
"exp": 1710973269,
"iat": 1679437269,
"iss": "https://container.googleapis.com/v1/projects/some-info";,
"kubernetes.io": {
"namespace": "pulsar",
"pod": {
"name": "nginx",
"uid": "b75e88ae-753b-4eb8-854e-488c04fc12bc"
},
"serviceaccount": {
"name": "default",
"uid": "32732d79-3203-4f4a-a343-69215edf1a2a"
},
"warnafter": 1679440876
},
"nbf": 1679437269,
"sub": "system:serviceaccount:michael-test:default"
}
```
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