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sources: delay source replacement

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Wait for four consecutive source selections giving a bad status
(falseticker, bad distance or jittery) before triggering the source
replacement. This should reduce the rate of unnecessary replacements
and shorten the time needed to find a solution when unreplaceable
falsetickers are preventing other sources from forming a majority due
to switching back and forth to unreachable servers.
This commit is contained in:
Miroslav Lichvar
2023-06-15 12:54:32 +02:00
parent 123cb497b9
commit 2aefadd129
3 changed files with 71 additions and 22 deletions
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19
test/simulation/137-pool
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@@ -46,23 +46,4 @@ check_sync || test_fail
check_file_messages "20.*192.168.123.*" 15 17 measurements.log || test_fail
rm -f tmp/measurements.log
servers=6
falsetickers=2
client_server_conf="pool nodes-1-2-3-4-5-6.net1.clk maxsources 5 polltarget 1 iburst"
wander=1e-12
jitter=1e-6
min_sync_time=7
run_test || test_fail
check_chronyd_exit || test_fail
check_source_selection || test_fail
check_packet_interval || test_fail
check_sync || test_fail
check_log_messages "Detected falseticker" 2 10 || test_fail
check_log_messages "Source 192.168.123.. replaced with" 1 1 || test_fail
check_file_messages "20.*192.168.123.* 11.1 6 6 " 15 17 measurements.log || test_fail
check_file_messages "20.*00:\(00:07\|01:..\) 192.168.123.* 11.1 6 6 " 1 1 measurements.log || test_fail
rm -f tmp/measurements.log
test_pass