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#
# Copyright (c) 2009-Present, Redis Ltd.
# All rights reserved.
#
# Copyright (c) 2024-present, Valkey contributors.
# All rights reserved.
#
# Licensed under your choice of (a) the Redis Source Available License 2.0
# (RSALv2); or (b) the Server Side Public License v1 (SSPLv1); or (c) the
# GNU Affero General Public License v3 (AGPLv3).
#
# Portions of this file are available under BSD3 terms; see REDISCONTRIBUTIONS for more information.
#
# Creates a master-slave pair and breaks the link continuously to force
# partial resyncs attempts, all this while flooding the master with
# write queries.
#
# You can specify backlog size, ttl, delay before reconnection, test duration
# in seconds, and an additional condition to verify at the end.
#
# If reconnect is > 0, the test actually try to break the connection and
# reconnect with the master, otherwise just the initial synchronization is
# checked for consistency.
proc test_psync {descr duration backlog_size backlog_ttl delay cond mdl sdl reconnect rdbchannel} {
start_server {tags {"repl"} overrides {save {}}} {
start_server {overrides {save {}}} {
set master [srv -1 client]
set master_host [srv -1 host]
set master_port [srv -1 port]
set slave [srv 0 client]
$master config set repl-backlog-size $backlog_size
$master config set repl-backlog-ttl $backlog_ttl
$master config set repl-diskless-sync $mdl
$master config set repl-diskless-sync-delay 1
$master config set repl-rdb-channel $rdbchannel
$slave config set repl-diskless-load $sdl
$slave config set repl-rdb-channel $rdbchannel
set load_handle0 [start_bg_complex_data $master_host $master_port 9 100000]
set load_handle1 [start_bg_complex_data $master_host $master_port 11 100000]
set load_handle2 [start_bg_complex_data $master_host $master_port 12 100000]
test {Slave should be able to synchronize with the master} {
$slave slaveof $master_host $master_port
wait_for_condition 50 100 {
[lindex [r role] 0] eq {slave} &&
[lindex [r role] 3] eq {connected}
} else {
fail "Replication not started."
}
}
# Check that the background clients are actually writing.
test {Detect write load to master} {
wait_for_condition 50 1000 {
[$master dbsize] > 100
} else {
fail "Can't detect write load from background clients."
}
}
test "Test replication partial resync: $descr (diskless: $mdl, $sdl, reconnect: $reconnect, rdbchannel: $rdbchannel)" {
# Now while the clients are writing data, break the maste-slave
# link multiple times.
if ($reconnect) {
for {set j 0} {$j < $duration*10} {incr j} {
after 100
# catch {puts "MASTER [$master dbsize] keys, REPLICA [$slave dbsize] keys"}
if {($j % 20) == 0} {
catch {
if {$delay} {
$slave multi
$slave client kill $master_host:$master_port
$slave debug sleep $delay
$slave exec
} else {
$slave client kill $master_host:$master_port
}
}
}
}
}
stop_bg_complex_data $load_handle0
stop_bg_complex_data $load_handle1
stop_bg_complex_data $load_handle2
# Wait for the slave to reach the "online"
# state from the POV of the master.
set retry 5000
while {$retry} {
set info [$master info]
if {[string match {*slave0:*state=online*} $info]} {
break
} else {
incr retry -1
after 100
}
}
if {$retry == 0} {
error "assertion:Slave not correctly synchronized"
}
# Wait that slave acknowledge it is online so
# we are sure that DBSIZE and DEBUG DIGEST will not
# fail because of timing issues. (-LOADING error)
wait_for_condition 5000 100 {
[lindex [$slave role] 3] eq {connected}
} else {
fail "Slave still not connected after some time"
}
wait_for_condition 100 100 {
[$master debug digest] == [$slave debug digest]
} else {
set csv1 [csvdump r]
set csv2 [csvdump {r -1}]
set fd [open /tmp/repldump1.txt w]
puts -nonewline $fd $csv1
close $fd
set fd [open /tmp/repldump2.txt w]
puts -nonewline $fd $csv2
close $fd
fail "Master - Replica inconsistency, Run diff -u against /tmp/repldump*.txt for more info"
}
assert {[$master dbsize] > 0}
eval $cond
}
}
}
}
tags {"external:skip"} {
foreach mdl {no yes} {
foreach sdl {disabled swapdb} {
foreach rdbchannel {yes no} {
if {$rdbchannel == "yes" && $mdl == "no"} {
# rdbchannel replication requires repl-diskless-sync enabled
continue
}
test_psync {no reconnection, just sync} 6 1000000 3600 0 {
} $mdl $sdl 0 $rdbchannel
test_psync {ok psync} 6 100000000 3600 0 {
assert {[s -1 sync_partial_ok] > 0}
} $mdl $sdl 1 $rdbchannel
test_psync {no backlog} 6 100 3600 0.5 {
assert {[s -1 sync_partial_err] > 0}
} $mdl $sdl 1 $rdbchannel
test_psync {ok after delay} 3 100000000 3600 3 {
assert {[s -1 sync_partial_ok] > 0}
} $mdl $sdl 1 $rdbchannel
test_psync {backlog expired} 3 100000000 1 3 {
assert {[s -1 sync_partial_err] > 0}
} $mdl $sdl 1 $rdbchannel
}
}
}
}
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