haproxy/reg-tests/cache/caching_rules.vtc
Willy Tarreau e1465c1e46 REGTESTS: disable inter-thread idle connection sharing on sensitive tests
Some regtests involve multiple requests from multiple clients, which can
be dispatched as multiple requests to a server. It turns out that the
idle connection sharing works so well that very quickly few connections
are used, and regularly some of the remaining idle server connections
time out at the moment they were going to be reused, causing those random
"HTTP header incomplete" traces in the logs that make them fail often. In
the end this is only an artefact of the test environment.

And indeed, some tests like normalize-uri which perform a lot of reuse
fail very often, about 20-30% of the times in the CI, and 100% of the
time in local when running 1000 tests in a row. Others like ubase64,
sample_fetches or vary_* fail less often but still a lot in tests.

This patch addresses this by adding "tune.idle-pool.shared off" to all
tests which have at least twice as many requests as clients. It proves
very effective as no single error happens on normalize-uri anymore after
10000 tests. Also 100 full runs of all tests yield no error anymore.

One test is tricky, http_abortonclose, it used to fail ~10 times per
1000 runs and with this workaround still fails once every 1000 runs.
But the test is complex and there's a warning in it mentioning a
possible issue when run in parallel due to a port reuse.
2021-05-09 14:41:41 +02:00

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varnishtest "Caching rules test"
# A response will not be cached unless it has an explicit age (Cache-Control max-age of s-maxage, Expires) or a validator (Last-Modified, or ETag)
# A response will not be cached either if it has an Age header that is either invalid (should be an integer) or greater than its max age.
#REQUIRE_VERSION=2.4
feature ignore_unknown_macro
server s1 {
rxreq
expect req.url == "/max-age"
txresp -hdr "Cache-Control: max-age=5" \
-bodylen 150
rxreq
expect req.url == "/s-maxage"
txresp -hdr "Cache-Control: s-maxage=5" \
-bodylen 160
rxreq
expect req.url == "/last-modified"
txresp -hdr "Last-Modified: Thu, 22 Oct 2020 16:51:12 GMT" \
-bodylen 180
rxreq
expect req.url == "/etag"
txresp -hdr "ETag: \"etag\"" \
-bodylen 190
rxreq
expect req.url == "/uncacheable"
txresp \
-bodylen 200
rxreq
expect req.url == "/uncacheable"
txresp \
-bodylen 210
# Age response header checks
# Invalid age
rxreq
expect req.url == "/invalid_age"
txresp -hdr "Cache-Control: max-age=5" \
-hdr "Age: abc" -bodylen 120
rxreq
expect req.url == "/invalid_age"
txresp -hdr "Cache-Control: max-age=5" \
-hdr "Age: abc" -bodylen 120
# Old age (greater than max age)
rxreq
expect req.url == "/old_age"
txresp -hdr "Cache-Control: max-age=5" \
-hdr "Age: 10" -bodylen 130
rxreq
expect req.url == "/old_age"
txresp -hdr "Cache-Control: max-age=5" \
-hdr "Age: 10" -bodylen 130
# Good age
rxreq
expect req.url == "/good_age"
txresp -hdr "Cache-Control: max-age=500" \
-hdr "Age: 100" -bodylen 140
} -start
server s2 {
rxreq
expect req.url == "/expires"
# Expires header is filled directly by the expires_be backend"
txresp \
-bodylen 170
} -start
haproxy h1 -conf {
global
# WT: limit false-positives causing "HTTP header incomplete" due to
# idle server connections being randomly used and randomly expiring
# under us.
tune.idle-pool.shared off
defaults
mode http
${no-htx} option http-use-htx
timeout connect 1s
timeout client 1s
timeout server 1s
frontend fe
bind "fd@${fe}"
use_backend expires_be if { path_beg /expires }
default_backend test
backend expires_be
http-request cache-use my_cache
server www ${s2_addr}:${s2_port}
http-response set-header X-Cache-Hit %[res.cache_hit]
# Expires value set in the future (current_time+5s)
http-response set-header Expires %[date(5),http_date]
http-response cache-store my_cache
backend test
http-request cache-use my_cache
server www ${s1_addr}:${s1_port}
http-response cache-store my_cache
http-response set-header X-Cache-Hit %[res.cache_hit]
cache my_cache
total-max-size 3
max-age 20
max-object-size 3072
} -start
client c1 -connect ${h1_fe_sock} {
txreq -url "/max-age"
rxresp
expect resp.status == 200
expect resp.bodylen == 150
txreq -url "/max-age"
rxresp
expect resp.status == 200
expect resp.bodylen == 150
expect resp.http.X-Cache-Hit == 1
txreq -url "/s-maxage"
rxresp
expect resp.status == 200
expect resp.bodylen == 160
txreq -url "/s-maxage"
rxresp
expect resp.status == 200
expect resp.bodylen == 160
expect resp.http.X-Cache-Hit == 1
txreq -url "/expires"
rxresp
expect resp.status == 200
expect resp.bodylen == 170
txreq -url "/expires"
rxresp
expect resp.status == 200
expect resp.bodylen == 170
expect resp.http.X-Cache-Hit == 1
txreq -url "/last-modified"
rxresp
expect resp.status == 200
expect resp.bodylen == 180
txreq -url "/last-modified"
rxresp
expect resp.status == 200
expect resp.bodylen == 180
expect resp.http.X-Cache-Hit == 1
txreq -url "/etag"
rxresp
expect resp.status == 200
expect resp.bodylen == 190
txreq -url "/etag"
rxresp
expect resp.status == 200
expect resp.bodylen == 190
expect resp.http.X-Cache-Hit == 1
# The next response should not be cached
txreq -url "/uncacheable"
rxresp
expect resp.status == 200
expect resp.bodylen == 200
txreq -url "/uncacheable"
rxresp
expect resp.status == 200
expect resp.bodylen == 210
expect resp.http.X-Cache-Hit == 0
# Age header tests
txreq -url "/invalid_age"
rxresp
expect resp.status == 200
expect resp.bodylen == 120
expect resp.http.X-Cache-Hit == 0
txreq -url "/invalid_age"
rxresp
expect resp.status == 200
expect resp.bodylen == 120
expect resp.http.X-Cache-Hit == 0
txreq -url "/old_age"
rxresp
expect resp.status == 200
expect resp.bodylen == 130
expect resp.http.X-Cache-Hit == 0
txreq -url "/old_age"
rxresp
expect resp.status == 200
expect resp.bodylen == 130
expect resp.http.X-Cache-Hit == 0
txreq -url "/good_age"
rxresp
expect resp.status == 200
expect resp.bodylen == 140
expect resp.http.X-Cache-Hit == 0
txreq -url "/good_age"
rxresp
expect resp.status == 200
expect resp.bodylen == 140
expect resp.http.X-Cache-Hit == 1
} -run