How do you troubleshoot http_checks?

[FrequentFlyer]

In addition to @charsleysa’s suggestion above…

One could program a GPT-3 bot to respond to posts here with Fly folks’ answers & suggestions

@kurt

When a deployment fails, the first step is to look at a failed VM and see what you can figure out.
…
To see the specific VM status, run fly status --all to get a list of VMs.
Find one with status failed , then run fly vm status <id> .
This will give you a lot more information.
Make sure you check the exit code.
If it’s 0 it means health check failures, if it’s not zero it’s some issue crashing the process.

Also try setting tls_skip_verify = true.
Don’t need TLS for an HTTP check.

Then, if you’re still stick in a redirect loop of some sort for the check, this should help:

@kurt

This is most likely because your health check is responding with a redirect to https://

Try just removing the health check entirely, this will make it default to a TCP connection check.

If that works, you’ll need to modify your app to accept a health check URL that doesn’t perform a redirect. Health checks have to return a 200 response to count.