374 lines
14 KiB
Tcl
374 lines
14 KiB
Tcl
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proc show_cluster_status {} {
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uplevel 1 {
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# The following is the regexp we use to match the log line
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# time info. Logs are in the following form:
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#
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# 11296:M 25 May 2020 17:37:14.652 # Server initialized
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set log_regexp {^[0-9]+:[A-Z] [0-9]+ [A-z]+ [0-9]+ ([0-9:.]+) .*}
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set repl_regexp {(master|repl|sync|backlog|meaningful|offset)}
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puts "Master ID is $master_id"
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for {set j 0} {$j < 5} {incr j} {
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puts "$j: sync_full: [status $R($j) sync_full]"
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puts "$j: id1 : [status $R($j) master_replid]:[status $R($j) master_repl_offset]"
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puts "$j: id2 : [status $R($j) master_replid2]:[status $R($j) second_repl_offset]"
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puts "$j: backlog : firstbyte=[status $R($j) repl_backlog_first_byte_offset] len=[status $R($j) repl_backlog_histlen]"
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puts "$j: x var is : [$R($j) GET x]"
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puts "---"
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}
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# Show the replication logs of every instance, interleaving
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# them by the log date.
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#
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# First: load the lines as lists for each instance.
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array set log {}
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for {set j 0} {$j < 5} {incr j} {
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set fd [open $R_log($j)]
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while {[gets $fd l] >= 0} {
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if {[regexp $log_regexp $l] &&
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[regexp -nocase $repl_regexp $l]} {
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lappend log($j) $l
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}
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}
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close $fd
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}
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# To interleave the lines, at every step consume the element of
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# the list with the lowest time and remove it. Do it until
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# all the lists are empty.
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#
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# regexp {^[0-9]+:[A-Z] [0-9]+ [A-z]+ [0-9]+ ([0-9:.]+) .*} $l - logdate
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while 1 {
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# Find the log with smallest time.
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set empty 0
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set best 0
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set bestdate {}
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for {set j 0} {$j < 5} {incr j} {
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if {[llength $log($j)] == 0} {
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incr empty
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continue
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}
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regexp $log_regexp [lindex $log($j) 0] - date
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if {$bestdate eq {}} {
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set best $j
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set bestdate $date
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} else {
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if {[string compare $bestdate $date] > 0} {
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set best $j
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set bestdate $date
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}
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}
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}
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if {$empty == 5} break ; # Our exit condition: no more logs
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# Emit the one with the smallest time (that is the first
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# event in the time line).
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puts "\[$best port $R_port($best)\] [lindex $log($best) 0]"
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set log($best) [lrange $log($best) 1 end]
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}
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}
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}
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start_server {tags {"psync2 external:skip"}} {
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start_server {} {
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start_server {} {
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start_server {} {
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start_server {} {
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set master_id 0 ; # Current master
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set start_time [clock seconds] ; # Test start time
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set counter_value 0 ; # Current value of the Redis counter "x"
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# Config
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set debug_msg 0 ; # Enable additional debug messages
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set no_exit 0 ; # Do not exit at end of the test
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set duration 40 ; # Total test seconds
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set genload 1 ; # Load master with writes at every cycle
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set genload_time 5000 ; # Writes duration time in ms
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set disconnect 1 ; # Break replication link between random
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# master and slave instances while the
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# master is loaded with writes.
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set disconnect_period 1000 ; # Disconnect repl link every N ms.
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for {set j 0} {$j < 5} {incr j} {
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set R($j) [srv [expr 0-$j] client]
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set R_host($j) [srv [expr 0-$j] host]
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set R_port($j) [srv [expr 0-$j] port]
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set R_log($j) [srv [expr 0-$j] stdout]
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if {$debug_msg} {puts "Log file: [srv [expr 0-$j] stdout]"}
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}
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set cycle 1
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while {([clock seconds]-$start_time) < $duration} {
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test "PSYNC2: --- CYCLE $cycle ---" {}
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incr cycle
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# Create a random replication layout.
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# Start with switching master (this simulates a failover).
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# 1) Select the new master.
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set master_id [randomInt 5]
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set used [list $master_id]
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test "PSYNC2: \[NEW LAYOUT\] Set #$master_id as master" {
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$R($master_id) slaveof no one
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$R($master_id) config set repl-ping-replica-period 1 ;# increse the chance that random ping will cause issues
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if {$counter_value == 0} {
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$R($master_id) set x $counter_value
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}
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}
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# 2) Attach all the slaves to a random instance
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while {[llength $used] != 5} {
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while 1 {
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set slave_id [randomInt 5]
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if {[lsearch -exact $used $slave_id] == -1} break
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}
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set rand [randomInt [llength $used]]
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set mid [lindex $used $rand]
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set master_host $R_host($mid)
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set master_port $R_port($mid)
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test "PSYNC2: Set #$slave_id to replicate from #$mid" {
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$R($slave_id) slaveof $master_host $master_port
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}
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lappend used $slave_id
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}
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# Wait for replicas to sync. so next loop won't get -LOADING error
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wait_for_condition 50 1000 {
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[status $R([expr {($master_id+1)%5}]) master_link_status] == "up" &&
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[status $R([expr {($master_id+2)%5}]) master_link_status] == "up" &&
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[status $R([expr {($master_id+3)%5}]) master_link_status] == "up" &&
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[status $R([expr {($master_id+4)%5}]) master_link_status] == "up"
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} else {
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show_cluster_status
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fail "Replica not reconnecting"
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}
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# 3) Increment the counter and wait for all the instances
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# to converge.
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test "PSYNC2: cluster is consistent after failover" {
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$R($master_id) incr x; incr counter_value
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for {set j 0} {$j < 5} {incr j} {
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wait_for_condition 50 1000 {
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[$R($j) get x] == $counter_value
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} else {
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show_cluster_status
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fail "Instance #$j x variable is inconsistent"
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}
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}
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}
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# 4) Generate load while breaking the connection of random
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# slave-master pairs.
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test "PSYNC2: generate load while killing replication links" {
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set t [clock milliseconds]
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set next_break [expr {$t+$disconnect_period}]
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while {[clock milliseconds]-$t < $genload_time} {
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if {$genload} {
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$R($master_id) incr x; incr counter_value
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}
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if {[clock milliseconds] == $next_break} {
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set next_break \
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[expr {[clock milliseconds]+$disconnect_period}]
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set slave_id [randomInt 5]
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if {$disconnect} {
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$R($slave_id) client kill type master
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if {$debug_msg} {
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puts "+++ Breaking link for replica #$slave_id"
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}
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}
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}
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}
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}
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# 5) Increment the counter and wait for all the instances
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set x [$R($master_id) get x]
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test "PSYNC2: cluster is consistent after load (x = $x)" {
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for {set j 0} {$j < 5} {incr j} {
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wait_for_condition 50 1000 {
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[$R($j) get x] == $counter_value
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} else {
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show_cluster_status
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fail "Instance #$j x variable is inconsistent"
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}
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}
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}
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# wait for all the slaves to be in sync.
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set masteroff [status $R($master_id) master_repl_offset]
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wait_for_condition 500 100 {
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[status $R(0) master_repl_offset] >= $masteroff &&
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[status $R(1) master_repl_offset] >= $masteroff &&
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[status $R(2) master_repl_offset] >= $masteroff &&
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[status $R(3) master_repl_offset] >= $masteroff &&
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[status $R(4) master_repl_offset] >= $masteroff
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} else {
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show_cluster_status
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fail "Replicas offsets didn't catch up with the master after too long time."
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}
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if {$debug_msg} {
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show_cluster_status
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}
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test "PSYNC2: total sum of full synchronizations is exactly 4" {
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set sum 0
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for {set j 0} {$j < 5} {incr j} {
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incr sum [status $R($j) sync_full]
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}
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if {$sum != 4} {
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show_cluster_status
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assert {$sum == 4}
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}
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}
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# In absence of pings, are the instances really able to have
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# the exact same offset?
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$R($master_id) config set repl-ping-replica-period 3600
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wait_for_condition 500 100 {
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[status $R($master_id) master_repl_offset] == [status $R(0) master_repl_offset] &&
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[status $R($master_id) master_repl_offset] == [status $R(1) master_repl_offset] &&
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[status $R($master_id) master_repl_offset] == [status $R(2) master_repl_offset] &&
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[status $R($master_id) master_repl_offset] == [status $R(3) master_repl_offset] &&
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[status $R($master_id) master_repl_offset] == [status $R(4) master_repl_offset]
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} else {
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show_cluster_status
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fail "Replicas and master offsets were unable to match *exactly*."
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}
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# Limit anyway the maximum number of cycles. This is useful when the
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# test is skipped via --only option of the test suite. In that case
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# we don't want to see many seconds of this test being just skipped.
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if {$cycle > 50} break
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}
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test "PSYNC2: Bring the master back again for next test" {
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$R($master_id) slaveof no one
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set master_host $R_host($master_id)
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set master_port $R_port($master_id)
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for {set j 0} {$j < 5} {incr j} {
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if {$j == $master_id} continue
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$R($j) slaveof $master_host $master_port
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}
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# Wait for replicas to sync. it is not enough to just wait for connected_slaves==4
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# since we might do the check before the master realized that they're disconnected
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wait_for_condition 50 1000 {
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[status $R($master_id) connected_slaves] == 4 &&
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[status $R([expr {($master_id+1)%5}]) master_link_status] == "up" &&
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[status $R([expr {($master_id+2)%5}]) master_link_status] == "up" &&
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[status $R([expr {($master_id+3)%5}]) master_link_status] == "up" &&
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[status $R([expr {($master_id+4)%5}]) master_link_status] == "up"
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} else {
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show_cluster_status
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fail "Replica not reconnecting"
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}
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}
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test "PSYNC2: Partial resync after restart using RDB aux fields" {
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# Pick a random slave
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set slave_id [expr {($master_id+1)%5}]
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set sync_count [status $R($master_id) sync_full]
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set sync_partial [status $R($master_id) sync_partial_ok]
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set sync_partial_err [status $R($master_id) sync_partial_err]
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catch {
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$R($slave_id) config rewrite
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restart_server [expr {0-$slave_id}] true false
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set R($slave_id) [srv [expr {0-$slave_id}] client]
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}
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# note: just waiting for connected_slaves==4 has a race condition since
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# we might do the check before the master realized that the slave disconnected
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wait_for_condition 50 1000 {
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[status $R($master_id) sync_partial_ok] == $sync_partial + 1
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} else {
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puts "prev sync_full: $sync_count"
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puts "prev sync_partial_ok: $sync_partial"
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puts "prev sync_partial_err: $sync_partial_err"
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puts [$R($master_id) info stats]
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show_cluster_status
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fail "Replica didn't partial sync"
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}
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set new_sync_count [status $R($master_id) sync_full]
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assert {$sync_count == $new_sync_count}
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}
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test "PSYNC2: Replica RDB restart with EVALSHA in backlog issue #4483" {
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# Pick a random slave
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set slave_id [expr {($master_id+1)%5}]
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set sync_count [status $R($master_id) sync_full]
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# Make sure to replicate the first EVAL while the salve is online
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# so that it's part of the scripts the master believes it's safe
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# to propagate as EVALSHA.
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$R($master_id) EVAL {return redis.call("incr","__mycounter")} 0
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$R($master_id) EVALSHA e6e0b547500efcec21eddb619ac3724081afee89 0
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# Wait for the two to sync
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wait_for_condition 50 1000 {
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[$R($master_id) debug digest] == [$R($slave_id) debug digest]
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} else {
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show_cluster_status
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fail "Replica not reconnecting"
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}
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# Prevent the slave from receiving master updates, and at
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# the same time send a new script several times to the
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# master, so that we'll end with EVALSHA into the backlog.
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$R($slave_id) slaveof 127.0.0.1 0
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$R($master_id) EVALSHA e6e0b547500efcec21eddb619ac3724081afee89 0
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$R($master_id) EVALSHA e6e0b547500efcec21eddb619ac3724081afee89 0
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$R($master_id) EVALSHA e6e0b547500efcec21eddb619ac3724081afee89 0
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catch {
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$R($slave_id) config rewrite
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restart_server [expr {0-$slave_id}] true false
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set R($slave_id) [srv [expr {0-$slave_id}] client]
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}
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# Reconfigure the slave correctly again, when it's back online.
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set retry 50
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while {$retry} {
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if {[catch {
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$R($slave_id) slaveof $master_host $master_port
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}]} {
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after 1000
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} else {
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break
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}
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incr retry -1
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}
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# The master should be back at 4 slaves eventually
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wait_for_condition 50 1000 {
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[status $R($master_id) connected_slaves] == 4
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} else {
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show_cluster_status
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fail "Replica not reconnecting"
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}
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set new_sync_count [status $R($master_id) sync_full]
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assert {$sync_count == $new_sync_count}
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# However if the slave started with the full state of the
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# scripting engine, we should now have the same digest.
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wait_for_condition 50 1000 {
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[$R($master_id) debug digest] == [$R($slave_id) debug digest]
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} else {
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show_cluster_status
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fail "Debug digest mismatch between master and replica in post-restart handshake"
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}
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}
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if {$no_exit} {
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while 1 { puts -nonewline .; flush stdout; after 1000}
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}
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}}}}}
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