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Author SHA1 Message Date
Matt Holt
40b193fb79
reverseproxy: Improve hashing LB policies with HRW (#4724)
* reverseproxy: Improve hashing LB policies with HRW

Previously, if a list of upstreams changed, hash-based LB policies
would be greatly affected because the hash relied on the position of
upstreams in the pool. Highest Random Weight or "rendezvous" hashing
is apparently robust to pool changes. It runs in O(n) instead of
O(log n), but n is very small usually.

* Fix bug and update tests
2022-04-27 10:39:22 -06:00
Matt Holt
ab0455922a
reverseproxy: Dynamic upstreams (with SRV and A/AAAA support) (#4470)
* reverseproxy: Begin refactor to enable dynamic upstreams

Streamed here: https://www.youtube.com/watch?v=hj7yzXb11jU

* Implement SRV and A/AAA upstream sources

Also get upstreams at every retry loop iteration instead of just once
before the loop. See #4442.

* Minor tweaks from review

* Limit size of upstreams caches

* Add doc notes deprecating LookupSRV

* Provision dynamic upstreams

Still WIP, preparing to preserve health checker functionality

* Rejigger health checks

Move active health check results into handler-specific Upstreams.

Improve documentation regarding health checks and upstreams.

* Deprecation notice

* Add Caddyfile support, use `caddy.Duration`

* Interface guards

* Implement custom resolvers, add resolvers to http transport Caddyfile

* SRV: fix Caddyfile `name` inline arg, remove proto condition

* Use pointer receiver

* Add debug logs

Co-authored-by: Francis Lavoie <lavofr@gmail.com>
2022-03-06 17:43:39 -07:00
Matthew Holt
a17c3b568d
reverseproxy: Minor logging improvements 2021-05-05 14:52:24 -06:00
Simão Gomes Viana
9017557169
reverseproxy: fix hash selection policy (#4137)
* caddyhttp: reverseproxy: fix hash selection policy

Fixes: #4135
Test: go test './...' -count=1

* caddyhttp: reverseproxy: add test to catch #4135

If you revert the last commit, the test will fail.
2021-04-29 10:52:22 -06:00
Matthew Holt
132525de3b
reverseproxy: Minor lint fixes 2020-12-14 15:30:55 -07:00
Dimitri Masson
6e0849d4c2
reverseproxy: Implement cookie hash selection policy (#3809)
* add CookieHashSelection for session affinity

* add CookieHashSelection for session affinity

* register module

* reverse_proxy: Add and fix cookie lb_policy

* reverse_proxy: Manage hmac.write error on cookie hash selection

* reverse_proxy: fix some comments

* reverse_proxy: variable `cookieValue` is inside the else block

* reverse_proxy: Abstract duplicate nuanced logic of reservoir sampling into a function

* reverse_proxy: Set a default secret is indeed useless

* reverse_proxy: add configuration syntax for cookie lb_policy

* reverse_proxy: doc typo and improvement

Co-authored-by: utick <123liuqingdong@163.com>
2020-11-20 12:39:26 -07:00
Dimitri Masson
99b8f44486
reverse_proxy: Fix random_choose selection policy (#3811) 2020-11-16 12:47:15 -07:00
Matthew Holt
b4f4fcd437
Migrate some selection policy tests over to v2 2019-09-09 21:44:58 -06:00
Matthew Holt
026df7c5cb
reverse_proxy: WIP refactor and support for FastCGI 2019-09-02 22:01:02 -06:00