Test serve stale cache with timeout 0 and CNAME

Add a couple of tests that verify the serve-stale behavior when
stale-answer-client-timeout is set to 0 and a (stale) CNAME record is
queried.

Related #3517

diff --git a/bin/tests/system/serve-stale/ns1/named3.conf.in b/bin/tests/system/serve-stale/ns1/named3.conf.in
index 263baa095c8fbe0b113057c100542c6c8cfbc384..23f1baaa46c0ef6f999dc6e0ba685a784f623136 100644 (file)
--- a/bin/tests/system/serve-stale/ns1/named3.conf.in
+++ b/bin/tests/system/serve-stale/ns1/named3.conf.in
@@ -41,3 +41,8 @@ zone "." {
        type primary;
        file "root.db";
 };
+
+zone "stale.test" {
+       type primary;
+       file "stale.test.db";
+};

diff --git a/bin/tests/system/serve-stale/ns1/stale.test.db b/bin/tests/system/serve-stale/ns1/stale.test.db
new file mode 100644 (file)
index 0000000..d389e7c
--- /dev/null
+++ b/bin/tests/system/serve-stale/ns1/stale.test.db
@@ -0,0 +1,19 @@
+; Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+;
+; SPDX-License-Identifier: MPL-2.0
+;
+; This Source Code Form is subject to the terms of the Mozilla Public
+; License, v. 2.0.  If a copy of the MPL was not distributed with this
+; file, you can obtain one at https://mozilla.org/MPL/2.0/.
+;
+; See the COPYRIGHT file distributed with this work for additional
+; information regarding copyright ownership.
+
+$ORIGIN stale.test.
+stale.test.            300     SOA     . . 0 0 0 0 0
+stale.test.            300     NS      ns.stale.test.
+ns.stale.test.         300     A       10.53.0.1
+cname1.stale.test.     1       CNAME   a1.stale.test.
+a1.stale.test.         1       A       192.0.2.1
+cname2.stale.test.     1       CNAME   a2.stale.test.
+a2.stale.test.         300     A       192.0.2.2

diff --git a/bin/tests/system/serve-stale/tests.sh b/bin/tests/system/serve-stale/tests.sh
index 59e8a1de740692ee1548ffac115ffec3d7f49c84..da85156fb6c395f01dce9b8a56e16222f1b41dda 100755 (executable)
--- a/bin/tests/system/serve-stale/tests.sh
+++ b/bin/tests/system/serve-stale/tests.sh
@@ -1890,6 +1890,88 @@ retry_quiet 10 wait_for_nodata_refresh || ret=1
 if [ $ret != 0 ]; then echo_i "failed"; fi
 status=$((status+ret))
 
+############################################################
+# Test for stale-answer-client-timeout 0 and CNAME record. #
+############################################################
+echo_i "test stale-answer-client-timeout (0) and CNAME record"
+
+n=$((n+1))
+echo_i "prime cache cname1.stale.test (stale-answer-client-timeout 0) ($n)"
+ret=0
+$DIG -p ${PORT} @10.53.0.3 cname1.stale.test A > dig.out.test$n
+grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
+grep "ANSWER: 2," dig.out.test$n > /dev/null || ret=1
+grep "cname1\.stale\.test\..*1.*IN.*CNAME.*a1\.stale\.test\." dig.out.test$n > /dev/null || ret=1
+grep "a1\.stale\.test\..*1.*IN.*A.*192\.0\.2\.1" dig.out.test$n > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status+ret))
+
+# Allow RRset to become stale.
+sleep 1
+
+n=$((n+1))
+ret=0
+echo_i "check stale cname1.stale.test comes from cache (stale-answer-client-timeout 0) ($n)"
+nextpart ns3/named.run > /dev/null
+$DIG -p ${PORT} @10.53.0.3 cname1.stale.test A > dig.out.test$n
+wait_for_log 5 "cname1.stale.test stale answer used, an attempt to refresh the RRset" ns3/named.run || ret=1
+grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
+grep "ANSWER: 2," dig.out.test$n > /dev/null || ret=1
+grep "cname1\.stale\.test\..*3.*IN.*CNAME.*a1\.stale\.test\." dig.out.test$n > /dev/null || ret=1
+grep "a1\.stale\.test\..*3.*IN.*A.*192\.0\.2\.1" dig.out.test$n > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status+ret))
+
+n=$((n+1))
+echo_i "check server is alive or restart ($n)"
+ret=0
+$RNDCCMD 10.53.0.3 status > rndc.out.test$n 2>&1 || ret=1
+if [ $ret != 0 ]; then
+    echo_i "failed"
+    echo_i "restart ns3"
+    start_server --noclean --restart --port ${PORT} serve-stale ns3
+fi
+status=$((status+ret))
+
+n=$((n+1))
+echo_i "prime cache cname2.stale.test (stale-answer-client-timeout 0) ($n)"
+ret=0
+$DIG -p ${PORT} @10.53.0.3 cname2.stale.test A > dig.out.test$n
+grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
+grep "ANSWER: 2," dig.out.test$n > /dev/null || ret=1
+grep "cname2\.stale\.test\..*1.*IN.*CNAME.*a2\.stale\.test\." dig.out.test$n > /dev/null || ret=1
+grep "a2\.stale\.test\..*300.*IN.*A.*192\.0\.2\.2" dig.out.test$n > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status+ret))
+
+# Allow CNAME record in the RRSET to become stale.
+sleep 1
+
+n=$((n+1))
+ret=0
+echo_i "check stale cname2.stale.test comes from cache (stale-answer-client-timeout 0) ($n)"
+nextpart ns3/named.run > /dev/null
+$DIG -p ${PORT} @10.53.0.3 cname2.stale.test A > dig.out.test$n
+wait_for_log 5 "cname2.stale.test stale answer used, an attempt to refresh the RRset" ns3/named.run || ret=1
+grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
+grep "ANSWER: 2," dig.out.test$n > /dev/null || ret=1
+grep "cname2\.stale\.test\..*3.*IN.*CNAME.*a2\.stale\.test\." dig.out.test$n > /dev/null || ret=1
+# We can't reliably test the TTL of the a2.stale.test A record.
+grep "a2\.stale\.test\..*IN.*A.*192\.0\.2\.2" dig.out.test$n > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status+ret))
+
+n=$((n+1))
+echo_i "check server is alive or restart ($n)"
+ret=0
+$RNDCCMD 10.53.0.3 status > rndc.out.test$n 2>&1 || ret=1
+if [ $ret != 0 ]; then
+    echo_i "failed"
+    echo_i "restart ns3"
+    start_server --noclean --restart --port ${PORT} serve-stale ns3
+fi
+status=$((status+ret))
+
 ####################################################################
 # Test for stale-answer-client-timeout 0 and stale-refresh-time 4. #
 ####################################################################