nginx - tengine proxy_upstream_tries

Question

I have a few questions about the proxy_upstream_tries command in tengine:

1. What is the relationship between proxy_upstream_tries and nginx's proxy_next_upstream? Can it work together?

2. Under what circumstances will proxy_upstream_tries fail over? 502? 503? 504?

3. Are there any conflicts between the two instructions?

Answer 1

1. proxy_upstream_tries limits the number of retries, while proxy_next_upstream specifies the conditions for retries. Can work together.

2. "What situation" is determined by the proxy_next_upstream command

3. No

Reference documentation:

• proxy_next_upstream

• proxy_upstream_tries

proxy_upstream_tries implementation:

• first commit: https://github.com/alibaba/tengine/pull/322