[Bug][fn] Go functions runtime does not support any sort of auth.

[flowchartsman]

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Version

After enabling JWT auth on our cluster, all of our Go functions started failing. This is because authentication information is only passed to the pulsar-admin command, and also because the Go function SDK has no concept of auth providers.

Minimal reproduce step

Just enable auth, and watch your go functions start to complain:

broker.pulsar.svc.cluster.local:6650 local_addr=172.27.168.187:37436
2023/06/01 03:05:16.139 connection.go:226: [warning] Failed to establish connection with broker: 'Unable to authenticate'  remote_addr=pulsar://pulsar-broker.pulsar.svc.cluster.local:6650 local_addr=172.27.168.187:37436
2023/06/01 03:05:45.027 log.go:77: [error] create producer error:connection error
2023/06/01 03:05:45.027 instance.go:210: [fatal] connection error
Stream closed EOF for pulsar/pf-public-default-function-test-30-c169f141-0 (pulsarfunction)

What did you expect to see?

Working functions.

What did you see instead?

Dead functions.

Anything else?

No response

Are you willing to submit a PR?

• I'm willing to submit a PR!