spacewander commented on a change in pull request #3910:
URL: https://github.com/apache/apisix/pull/3910#discussion_r602062170
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File path: apisix/plugins/limit-count/limit-count-redis-cluster.lua
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@@ -32,7 +32,7 @@ local mt = {
local function new_redis_cluster(conf)
local config = {
- name = "apisix-redis-cluster",
+ name = "apisix-redis-cluster-" .. conf.name,
Review comment:
I read through the `resty.rediscluster`. Look like this library uses a
module-level `slot_cache`, and the key is the `config.name`.
So it is no doubted that different configurations with the same name will
collide.
~~What about using `"apisix-redis-cluster-" .. tostring(conf)` directly?~~
Better to add a comment about this change as future maintainers may not read
through the library.
~~Different routes using the same cluster will still need to share the
slot_cache. Would it be better to use crc32(nodes) to generate the suffix?~~
Sorry for my fickle mind. It seems the library doesn't provide a way to
clean up stale cached slots. So using auto-generated name is unsafe. My latest
idea is to require user to specify the name of redis cluster. It is a break
change but it is reasonable to introduce break change to fix bug.
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