CLIENT SETNAME. LUA

[Александр Нижегородцев]

Hello!

I'm working with redis cluster and I want to allow clients to identify themselves using CLIENT SETNAME command. But I can't allow all CLIENT commands to be available because there are such commands and CLIENT KILL and CLIENT PAUSE.

I decided to rename CLIENT command to "new_unguessable_name" and provide LUA script which allows to perform only CLIENT SETNAME command:

SCRIPT LOAD "return redis.call('new_unguessable_name', 'SETNAME', ARGV[1])"

So in theory from client side I can use evalsha to set client name:
evalsha "setname_script_sha1" 0 "Client_name_1"
But in fact redis throws error: "This Redis command is not allowed from scripts". Is it possible somehow to avoid this restriction? Why redis don't allow me to set client name using LUA script?

[Jan-Erik Rediger]

Lua scripts use a fake client inside the Redis server.
Even if it would allow `CLIENT SETNAME` the name would be for this fake client,
not for the real network-connected client.
That's also why the CLIENT commands are currently disallowed.

-- jer

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