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Added system test for stale-refresh-time

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This test works as follow:
- Query for data.example rrset.
- Sleep until its TTL expires (2 secs).
- Disable authoritative server.
- Query for data.example again.
- Since server is down, answer come from stale cache, which has
  a configured stale-answer-ttl of 3 seconds.
- Enable authoritative server.
- Query for data.example again
- Since last query before activating authoritative server failed, and
  since 'stale-refresh-time' seconds hasn't elapsed yet, answer should
  come from stale cache and not from the authoritative server.
This commit is contained in:
Diego Fronza
2020-10-19 21:25:34 -03:00
parent fc074f15a8
commit a3dbc5fb05
1 changed files with 98 additions and 4 deletions
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102
bin/tests/system/serve-stale/tests.sh
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@@ -471,10 +471,6 @@ grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
# keep track of time so we can access these rrset later,
# when we expect them to become ancient.
t1=`$PERL -e 'print time()'`
n=$((n+1))
echo_i "prime cache othertype.example (low max-stale-ttl) ($n)"
ret=0
@@ -502,6 +498,10 @@ grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
# keep track of time so we can access these rrset later,
# when we expect them to become ancient.
t1=`$PERL -e 'print time()'`
n=$((n+1))
echo_i "verify prime cache statistics (low max-stale-ttl) ($n)"
ret=0
@@ -656,6 +656,100 @@ grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
# Test stale-refresh-time when serve-stale is enabled via rndc.
# Steps for testing stale-refresh-time option (default).
# 1. Prime cache data.example txt
# 2. Disable responses from authoritative server.
# 3. Sleep for TTL duration so rrset TTL expires (2 sec)
# 4. Query data.example
# 5. Check if response come from stale rrset (3 sec TTL)
# 6. Enable responses from authoritative server.
# 7. Query data.example
# 8. Check if response come from stale rrset, since the query
# is within stale-refresh-time window.
n=$((n+1))
echo_i "flush cache, enable responses from authoritative server ($n)"
ret=0
$RNDCCMD 10.53.0.1 flushtree example > rndc.out.test$n.1 2>&1 || ret=1
$DIG -p ${PORT} @10.53.0.2 txt enable > dig.out.test$n
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "TXT.\"1\"" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
n=$((n+1))
echo_i "check 'rndc serve-stale status' ($n)"
ret=0
$RNDCCMD 10.53.0.1 serve-stale status > rndc.out.test$n 2>&1 || ret=1
grep '_default: on (rndc) (stale-answer-ttl=3 max-stale-ttl=20)' rndc.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
# Step 1.
n=$((n+1))
echo_i "prime cache data.example (stale-refresh-time rndc) ($n)"
ret=0
$DIG -p ${PORT} @10.53.0.1 data.example TXT > dig.out.test$n
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "data\.example\..*2.*IN.*TXT.*A text record with a 2 second ttl" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
# Step 2.
n=$((n+1))
echo_i "disable responses from authoritative server ($n)"
ret=0
$DIG -p ${PORT} @10.53.0.2 txt disable > dig.out.test$n
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "TXT.\"0\"" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
# Step 3.
sleep 2
# Step 4.
n=$((n+1))
echo_i "sending query for test ($n)"
$DIG -p ${PORT} @10.53.0.1 data.example TXT > dig.out.test$n
# Step 5.
echo_i "check stale data.example (stale-refresh-time rndc) ($n)"
ret=0
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "data\.example\..*3.*IN.*TXT.*A text record with a 2 second ttl" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
# Step 6.
n=$((n+1))
echo_i "enable responses from authoritative server ($n)"
ret=0
$DIG -p ${PORT} @10.53.0.2 txt enable > dig.out.test$n
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "TXT.\"1\"" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
# Step 7.
echo_i "sending query for test $((n+1))"
$DIG -p ${PORT} @10.53.0.1 data.example TXT > dig.out.test$((n+1)) &
# ensure the file has been written before proceeding
waitfile dig.out.test$((n+1))
# Step 8.
n=$((n+1))
echo_i "check stale data.example comes from cache (stale-refresh-time rndc) ($n)"
ret=0
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "data\.example\..*3.*IN.*TXT.*A text record with a 2 second ttl" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
#
# Now test server with no serve-stale options set.
#