The problem with multiple replica sets in the group

[a1div0]

The function will not work correctly if there is more than one replica set in the group. My test cluster usually consists of two routers and two to three shards.

luatest/luatest/server.lua

Line 154 in b1e3631

local instance = (replicaset.instances or {})[instance_name]

[Totktonada]

The code you linked traverses over the whole groups-replicasets-instances topology and it doesn't assume anything about amount of replicasets in a group or amount of instances in a replicasets. Please, clarify your problem.

[a1div0]

Helper will not be able to raise a cluster with such a configuration:

test_config_3x.yml

[a1div0]

The code you linked traverses over the whole groups-replicasets-instances topology and it doesn't assume anything about amount of replicasets in a group or amount of instances in a replicasets.

This is wrong

[Totktonada]

In the given case the find_advertise_uri function tries to find the router-msk instance in the router-spb replicaset, fails and the No suitable URI to connect is found error is reported.

I ack the problem.

luatest/luatest/server.lua

Lines 152 to 157 in b1e3631

	for _, group in pairs(config.groups or {}) do
	for _, replicaset in pairs(group.replicasets or {}) do
	local instance = (replicaset.instances or {})[instance_name]
	if instance == nil then
	break
	end

This break should be continue.