dnsdist: Also test metrics with recvmmsg support enabled

We have seen in https://github.com/PowerDNS/pdns/issues/13148 that
we can easily break frontend metrics when `recvmmsg`/`sendmmsg`
support is enabled via `setUDPMultipleMessagesVectorSize()`, so let's
test the metrics in that case explicitly so we do not break them
again in the future.

(cherry picked from commit bd5a0bc629d6445be7a77e1c28539702f5cf2585)

diff --git a/regression-tests.dnsdist/test_Metrics.py b/regression-tests.dnsdist/test_Metrics.py
index 5a70d0d8cefda59b5d9ea6987cd3bb782323d862..877260ff86c2f04c782824517d5c5c6fd0759cb3 100644 (file)
--- a/regression-tests.dnsdist/test_Metrics.py
+++ b/regression-tests.dnsdist/test_Metrics.py
@@ -8,7 +8,7 @@ import unittest
 import dns
 from dnsdisttests import DNSDistTest
 
-class TestRuleMetrics(DNSDistTest):
+class RuleMetricsTest(object):
 
     _config_template = """
     addTLSLocal("127.0.0.1:%s", "%s", "%s", { provider="openssl" })
@@ -176,3 +176,12 @@ class TestRuleMetrics(DNSDistTest):
             self.assertEqual(self.getMetric('frontend-servfail'), frontendBefore + 2)
             self.assertEqual(self.getMetric('servfail-responses'), servfailBefore + 1)
             self.assertEqual(self.getMetric('rule-servfail'), ruleBefore)
+
+class TestRuleMetricsDefault(RuleMetricsTest, DNSDistTest):
+    None
+
+class TestRuleMetricsRecvmmsg(RuleMetricsTest, DNSDistTest):
+    # test the metrics with recvmmsg/sendmmsg support enabled as well
+    _config_template = RuleMetricsTest._config_template + """
+        setUDPMultipleMessagesVectorSize(10)
+    """