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https://issues.apache.org/jira/browse/TS-4085?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15065268#comment-15065268
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James Fang commented on TS-4085:
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Sorry i didn't make it clear.
By "global lua global", i really mean a global environment shared among all the
lua_newstate that ts_lua created.
What i want to do is to intercept some request that modifying this "global lua
global", so that i can update my
acl rules from ATS itself without some outside mechanisms as well as avoid
reloading ATS.
I don't know if this is the right approach to accomplish this, and i am also
concerning the impact of reloading ATS
on a production server.
>From my understanding, ts_lua creates TS_LUA_MAX_STATE_COUNT lua_newstate when
>started, and each
request is running from its own lua_newthread from one of these lua_newstate.
Each lua_newthread gets its global
environment from its parent lua_newstate, but this enviornment is somewhat
modified so it can only read but
not write to its parent's environment.
So the problem is:
1) a ts_lua request's ts_newthread can't modify the global environment of its
parent's lua_newstate;
2) even 1) is doable, the other (TS_LUA_MAX_STATE_COUNT - 1) lua_newstate are
not changed
Anyway, reloading ts_lua when running as a global plugin is also a great
feature to have.
> Supporting reloading lua script on ats reload for ts_lua when run as a global
> plugin
> ------------------------------------------------------------------------------------
>
> Key: TS-4085
> URL: https://issues.apache.org/jira/browse/TS-4085
> Project: Traffic Server
> Issue Type: New Feature
> Components: Lua, Plugins
> Reporter: James Fang
> Assignee: Kit Chan
> Fix For: sometime
>
>
> suppose i have some acl rules that seldom changes,
> i would like to make them a global table that shared among all the lua
> coroutines.
> i also would like to update the rule without restarting traffic server, but
> there seems to be no way to update this global after they are initalized.
> should i modify ts_lua to call some dynamic uploaded chunk that
> update the global for each ts_lua_main_ctx ?
> any ideas ?
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