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test(conf): fix flaky config sync testcases 

Before the recent changes these testcases relied on the fact that
peer nodes that are part of the test cluster are started one after
the other. This is now not the case in general with `emqx_cth_cluster`,
so now we need to additionally find the "longest running node" in the
cluster before running test logic.
This commit is contained in:
Andrew Mayorov 2024-03-11 13:03:13 +01:00 committed by zmstone
parent a00ce8fe41
commit 9ff53f4293
1 changed files with 12 additions and 2 deletions
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14
apps/emqx_conf/test/emqx_conf_app_SUITE.erl
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@ -64,7 +64,8 @@ t_copy_new_data_dir(Config) ->
),
%% 1. Start all nodes
[First | Rest] = Nodes = start_cluster(Cluster),
Nodes = start_cluster(Cluster),
[First | Rest] = sort_highest_uptime(Nodes),
try
NodeDataDir = erpc:call(First, emqx, data_dir, []),
File = NodeDataDir ++ "/configs/cluster.hocon",
@ -88,7 +89,8 @@ t_copy_deprecated_data_dir(Config) ->
),
%% 1. Start all nodes
[First | Rest] = Nodes = start_cluster(Cluster),
Nodes = start_cluster(Cluster),
[First | Rest] = sort_highest_uptime(Nodes),
try
NodeDataDir = erpc:call(First, emqx, data_dir, []),
File = NodeDataDir ++ "/configs/cluster-override.conf",
@ -246,3 +248,11 @@ cluster(TC, Specs, Config) ->
cluster_spec({Type, Num}) ->
{Type, list_to_atom(atom_to_list(?MODULE) ++ integer_to_list(Num))}.
sort_highest_uptime(Nodes) ->
Ranking = lists:sort([{-get_node_uptime(N), N} || N <- Nodes]),
element(2, lists:unzip(Ranking)).
get_node_uptime(Node) ->
{Milliseconds, _} = erpc:call(Node, erlang, statistics, [wall_clock]),
Milliseconds.