x/build: add LUCI openbsd-ppc64 builder

[n2vi]

Following the instructions at Dashboard builders:

hostname openbsd-ppc64-n2vi

CSR is attached after renaming since Github doesn't seem to allow attaching with the name openbsd-ppc64-n2vi.csr you asked for.

[gopherbot]

Change https://go.dev/cl/534976 mentions this issue: main.star: add openbsd-ppc64, linux-riscv64, freebsd-riscv64 builders

[dmitshur]

Thanks. Here's the resulting certificate: openbsd-ppc64-n2vi-1697128325.cert.txt.

I've mailed CLs to define your new builder in LUCI and will comment once that's done.

[n2vi]

Thank you; I confirm that using the cert I get a plausible looking luci_machine_tokend/token.json.

[dmitshur]

Glad to hear!

Step 3 is complete (CL 534976 is submitted), so you should be able to proceed with the next steps. Please feel free to comment here if you see something unexpected, or run into a problem that the documentation doesn't cover. Thanks.

[n2vi]

I have not read the code yet to diagnose this; leaving assigned to me.

2023/10/13 18:29:39 Bootstrapping the swarming bot with certificate authentication
2023/10/13 18:29:39 retrieving the luci-machine-token from the token file
2023/10/13 18:29:39 Downloading the swarming bot
2023/10/13 18:29:39 Starting the swarming bot /home/swarming/.swarming/swarming_bot.zip
72354 2023-10-13 18:29:47.331 E: ts_mon monitoring is disabled because the endpoint provided is invalid or not supported:
72354 2023-10-13 18:29:48.890 E: Request to https://chromium-swarm.appspot.com/swarming/api/v1/bot/handshake failed with HTTP status code 403: 403 Client Error: Forbidden for url: https://chromium-swarm.appspot.com/swarming/api/v1/bot/handshake
72354 2023-10-13 18:29:48.891 E: Failed to contact for handshake, retrying in 0 sec...