mirror of
http://github.com/valkey-io/valkey
synced 2024-11-22 00:52:38 +00:00
da127ed3dd
In diskless replication, we create a read pipe for the RDB, between the child and the parent.
When we close this pipe (fd), the read handler also needs to be removed from the event loop (if it still registered).
Otherwise, next time we will use the same fd, the registration will be fail (panic), because
we will use EPOLL_CTL_MOD (the fd still register in the event loop), on fd that already removed from epoll_ctl
(cherry picked from commit 501d775583)
791 lines
34 KiB
Tcl
791 lines
34 KiB
Tcl
proc log_file_matches {log pattern} {
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set fp [open $log r]
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set content [read $fp]
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close $fp
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string match $pattern $content
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}
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start_server {tags {"repl"}} {
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set slave [srv 0 client]
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set slave_host [srv 0 host]
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set slave_port [srv 0 port]
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set slave_log [srv 0 stdout]
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start_server {} {
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set master [srv 0 client]
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set master_host [srv 0 host]
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set master_port [srv 0 port]
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# Configure the master in order to hang waiting for the BGSAVE
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# operation, so that the slave remains in the handshake state.
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$master config set repl-diskless-sync yes
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$master config set repl-diskless-sync-delay 1000
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# Use a short replication timeout on the slave, so that if there
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# are no bugs the timeout is triggered in a reasonable amount
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# of time.
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$slave config set repl-timeout 5
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# Start the replication process...
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$slave slaveof $master_host $master_port
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test {Slave enters handshake} {
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wait_for_condition 50 1000 {
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[string match *handshake* [$slave role]]
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} else {
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fail "Replica does not enter handshake state"
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}
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}
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# But make the master unable to send
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# the periodic newlines to refresh the connection. The slave
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# should detect the timeout.
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$master debug sleep 10
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test {Slave is able to detect timeout during handshake} {
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wait_for_condition 50 1000 {
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[log_file_matches $slave_log "*Timeout connecting to the MASTER*"]
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} else {
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fail "Replica is not able to detect timeout"
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}
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}
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}
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}
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start_server {tags {"repl"}} {
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set A [srv 0 client]
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set A_host [srv 0 host]
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set A_port [srv 0 port]
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start_server {} {
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set B [srv 0 client]
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set B_host [srv 0 host]
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set B_port [srv 0 port]
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test {Set instance A as slave of B} {
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$A slaveof $B_host $B_port
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wait_for_condition 50 100 {
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[lindex [$A role] 0] eq {slave} &&
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[string match {*master_link_status:up*} [$A info replication]]
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} else {
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fail "Can't turn the instance into a replica"
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}
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}
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test {INCRBYFLOAT replication, should not remove expire} {
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r set test 1 EX 100
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r incrbyfloat test 0.1
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after 1000
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assert_equal [$A debug digest] [$B debug digest]
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}
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test {BRPOPLPUSH replication, when blocking against empty list} {
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set rd [redis_deferring_client]
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$rd brpoplpush a b 5
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r lpush a foo
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wait_for_condition 50 100 {
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[$A debug digest] eq [$B debug digest]
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} else {
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fail "Master and replica have different digest: [$A debug digest] VS [$B debug digest]"
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}
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}
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test {BRPOPLPUSH replication, list exists} {
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set rd [redis_deferring_client]
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r lpush c 1
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r lpush c 2
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r lpush c 3
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$rd brpoplpush c d 5
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after 1000
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assert_equal [$A debug digest] [$B debug digest]
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}
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test {BLPOP followed by role change, issue #2473} {
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set rd [redis_deferring_client]
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$rd blpop foo 0 ; # Block while B is a master
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# Turn B into master of A
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$A slaveof no one
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$B slaveof $A_host $A_port
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wait_for_condition 50 100 {
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[lindex [$B role] 0] eq {slave} &&
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[string match {*master_link_status:up*} [$B info replication]]
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} else {
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fail "Can't turn the instance into a replica"
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}
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# Push elements into the "foo" list of the new replica.
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# If the client is still attached to the instance, we'll get
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# a desync between the two instances.
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$A rpush foo a b c
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after 100
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wait_for_condition 50 100 {
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[$A debug digest] eq [$B debug digest] &&
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[$A lrange foo 0 -1] eq {a b c} &&
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[$B lrange foo 0 -1] eq {a b c}
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} else {
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fail "Master and replica have different digest: [$A debug digest] VS [$B debug digest]"
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}
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}
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}
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}
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start_server {tags {"repl"}} {
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r set mykey foo
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start_server {} {
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test {Second server should have role master at first} {
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s role
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} {master}
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test {SLAVEOF should start with link status "down"} {
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r slaveof [srv -1 host] [srv -1 port]
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s master_link_status
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} {down}
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test {The role should immediately be changed to "replica"} {
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s role
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} {slave}
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wait_for_sync r
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test {Sync should have transferred keys from master} {
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r get mykey
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} {foo}
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test {The link status should be up} {
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s master_link_status
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} {up}
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test {SET on the master should immediately propagate} {
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r -1 set mykey bar
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wait_for_condition 500 100 {
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[r 0 get mykey] eq {bar}
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} else {
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fail "SET on master did not propagated on replica"
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}
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}
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test {FLUSHALL should replicate} {
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r -1 flushall
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if {$::valgrind} {after 2000}
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list [r -1 dbsize] [r 0 dbsize]
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} {0 0}
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test {ROLE in master reports master with a slave} {
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set res [r -1 role]
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lassign $res role offset slaves
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assert {$role eq {master}}
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assert {$offset > 0}
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assert {[llength $slaves] == 1}
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lassign [lindex $slaves 0] master_host master_port slave_offset
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assert {$slave_offset <= $offset}
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}
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test {ROLE in slave reports slave in connected state} {
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set res [r role]
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lassign $res role master_host master_port slave_state slave_offset
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assert {$role eq {slave}}
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assert {$slave_state eq {connected}}
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}
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}
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}
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foreach mdl {no yes} {
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foreach sdl {disabled swapdb} {
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start_server {tags {"repl"}} {
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set master [srv 0 client]
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$master config set repl-diskless-sync $mdl
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$master config set repl-diskless-sync-delay 1
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set master_host [srv 0 host]
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set master_port [srv 0 port]
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set slaves {}
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start_server {} {
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lappend slaves [srv 0 client]
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start_server {} {
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lappend slaves [srv 0 client]
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start_server {} {
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lappend slaves [srv 0 client]
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test "Connect multiple replicas at the same time (issue #141), master diskless=$mdl, replica diskless=$sdl" {
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# start load handles only inside the test, so that the test can be skipped
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set load_handle0 [start_bg_complex_data $master_host $master_port 9 100000000]
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set load_handle1 [start_bg_complex_data $master_host $master_port 11 100000000]
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set load_handle2 [start_bg_complex_data $master_host $master_port 12 100000000]
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set load_handle3 [start_write_load $master_host $master_port 8]
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set load_handle4 [start_write_load $master_host $master_port 4]
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after 5000 ;# wait for some data to accumulate so that we have RDB part for the fork
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# Send SLAVEOF commands to slaves
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[lindex $slaves 0] config set repl-diskless-load $sdl
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[lindex $slaves 1] config set repl-diskless-load $sdl
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[lindex $slaves 2] config set repl-diskless-load $sdl
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[lindex $slaves 0] slaveof $master_host $master_port
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[lindex $slaves 1] slaveof $master_host $master_port
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[lindex $slaves 2] slaveof $master_host $master_port
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# Wait for all the three slaves to reach the "online"
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# state from the POV of the master.
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set retry 500
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while {$retry} {
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set info [r -3 info]
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if {[string match {*slave0:*state=online*slave1:*state=online*slave2:*state=online*} $info]} {
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break
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} else {
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incr retry -1
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after 100
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}
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}
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if {$retry == 0} {
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error "assertion:Slaves not correctly synchronized"
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}
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# Wait that slaves acknowledge they are online so
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# we are sure that DBSIZE and DEBUG DIGEST will not
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# fail because of timing issues.
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wait_for_condition 500 100 {
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[lindex [[lindex $slaves 0] role] 3] eq {connected} &&
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[lindex [[lindex $slaves 1] role] 3] eq {connected} &&
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[lindex [[lindex $slaves 2] role] 3] eq {connected}
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} else {
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fail "Slaves still not connected after some time"
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}
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# Stop the write load
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stop_bg_complex_data $load_handle0
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stop_bg_complex_data $load_handle1
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stop_bg_complex_data $load_handle2
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stop_write_load $load_handle3
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stop_write_load $load_handle4
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# Make sure that slaves and master have same
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# number of keys
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wait_for_condition 500 100 {
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[$master dbsize] == [[lindex $slaves 0] dbsize] &&
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[$master dbsize] == [[lindex $slaves 1] dbsize] &&
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[$master dbsize] == [[lindex $slaves 2] dbsize]
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} else {
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fail "Different number of keys between master and replica after too long time."
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}
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# Check digests
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set digest [$master debug digest]
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set digest0 [[lindex $slaves 0] debug digest]
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set digest1 [[lindex $slaves 1] debug digest]
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set digest2 [[lindex $slaves 2] debug digest]
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assert {$digest ne 0000000000000000000000000000000000000000}
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assert {$digest eq $digest0}
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assert {$digest eq $digest1}
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assert {$digest eq $digest2}
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}
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}
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}
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}
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}
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}
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}
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start_server {tags {"repl"}} {
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set master [srv 0 client]
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set master_host [srv 0 host]
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set master_port [srv 0 port]
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start_server {} {
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test "Master stream is correctly processed while the replica has a script in -BUSY state" {
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set load_handle0 [start_write_load $master_host $master_port 3]
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set slave [srv 0 client]
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$slave config set lua-time-limit 500
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$slave slaveof $master_host $master_port
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# Wait for the slave to be online
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wait_for_condition 500 100 {
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[lindex [$slave role] 3] eq {connected}
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} else {
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fail "Replica still not connected after some time"
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}
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# Wait some time to make sure the master is sending data
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# to the slave.
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after 5000
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# Stop the ability of the slave to process data by sendig
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# a script that will put it in BUSY state.
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$slave eval {for i=1,3000000000 do end} 0
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# Wait some time again so that more master stream will
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# be processed.
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after 2000
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# Stop the write load
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stop_write_load $load_handle0
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# number of keys
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wait_for_condition 500 100 {
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[$master debug digest] eq [$slave debug digest]
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} else {
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fail "Different datasets between replica and master"
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}
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}
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}
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}
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test {slave fails full sync and diskless load swapdb recovers it} {
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start_server {tags {"repl"}} {
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set slave [srv 0 client]
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set slave_host [srv 0 host]
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set slave_port [srv 0 port]
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set slave_log [srv 0 stdout]
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start_server {} {
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set master [srv 0 client]
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set master_host [srv 0 host]
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set master_port [srv 0 port]
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# Put different data sets on the master and slave
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# we need to put large keys on the master since the slave replies to info only once in 2mb
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$slave debug populate 2000 slave 10
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$master debug populate 200 master 100000
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$master config set rdbcompression no
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# Set master and slave to use diskless replication
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$master config set repl-diskless-sync yes
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$master config set repl-diskless-sync-delay 0
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$slave config set repl-diskless-load swapdb
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# Set master with a slow rdb generation, so that we can easily disconnect it mid sync
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# 10ms per key, with 200 keys is 2 seconds
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$master config set rdb-key-save-delay 10000
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# Start the replication process...
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$slave slaveof $master_host $master_port
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# wait for the slave to start reading the rdb
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wait_for_condition 50 100 {
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[s -1 loading] eq 1
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} else {
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fail "Replica didn't get into loading mode"
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}
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# make sure that next sync will not start immediately so that we can catch the slave in betweeen syncs
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$master config set repl-diskless-sync-delay 5
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# for faster server shutdown, make rdb saving fast again (the fork is already uses the slow one)
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$master config set rdb-key-save-delay 0
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# waiting slave to do flushdb (key count drop)
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wait_for_condition 50 100 {
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2000 != [scan [regexp -inline {keys\=([\d]*)} [$slave info keyspace]] keys=%d]
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} else {
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fail "Replica didn't flush"
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}
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# make sure we're still loading
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assert_equal [s -1 loading] 1
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# kill the slave connection on the master
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set killed [$master client kill type slave]
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# wait for loading to stop (fail)
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wait_for_condition 50 100 {
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[s -1 loading] eq 0
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} else {
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fail "Replica didn't disconnect"
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}
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# make sure the original keys were restored
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assert_equal [$slave dbsize] 2000
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}
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}
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}
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test {diskless loading short read} {
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start_server {tags {"repl"}} {
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set replica [srv 0 client]
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set replica_host [srv 0 host]
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set replica_port [srv 0 port]
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start_server {} {
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set master [srv 0 client]
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set master_host [srv 0 host]
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set master_port [srv 0 port]
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# Set master and replica to use diskless replication
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$master config set repl-diskless-sync yes
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$master config set rdbcompression no
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$replica config set repl-diskless-load swapdb
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# Try to fill the master with all types of data types / encodings
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for {set k 0} {$k < 3} {incr k} {
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for {set i 0} {$i < 10} {incr i} {
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r set "$k int_$i" [expr {int(rand()*10000)}]
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r expire "$k int_$i" [expr {int(rand()*10000)}]
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r set "$k string_$i" [string repeat A [expr {int(rand()*1000000)}]]
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r hset "$k hash_small" [string repeat A [expr {int(rand()*10)}]] 0[string repeat A [expr {int(rand()*10)}]]
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r hset "$k hash_large" [string repeat A [expr {int(rand()*10000)}]] [string repeat A [expr {int(rand()*1000000)}]]
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r sadd "$k set_small" [string repeat A [expr {int(rand()*10)}]]
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r sadd "$k set_large" [string repeat A [expr {int(rand()*1000000)}]]
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r zadd "$k zset_small" [expr {rand()}] [string repeat A [expr {int(rand()*10)}]]
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r zadd "$k zset_large" [expr {rand()}] [string repeat A [expr {int(rand()*1000000)}]]
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r lpush "$k list_small" [string repeat A [expr {int(rand()*10)}]]
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r lpush "$k list_large" [string repeat A [expr {int(rand()*1000000)}]]
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for {set j 0} {$j < 10} {incr j} {
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r xadd "$k stream" * foo "asdf" bar "1234"
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}
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r xgroup create "$k stream" "mygroup_$i" 0
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r xreadgroup GROUP "mygroup_$i" Alice COUNT 1 STREAMS "$k stream" >
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}
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}
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# Start the replication process...
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set loglines [count_log_lines -1]
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$master config set repl-diskless-sync-delay 0
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$replica replicaof $master_host $master_port
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# kill the replication at various points
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set attempts 3
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if {$::accurate} { set attempts 10 }
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for {set i 0} {$i < $attempts} {incr i} {
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# wait for the replica to start reading the rdb
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# using the log file since the replica only responds to INFO once in 2mb
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set res [wait_for_log_messages -1 {"*Loading DB in memory*"} $loglines 2000 1]
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set loglines [lindex $res 1]
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# add some additional random sleep so that we kill the master on a different place each time
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after [expr {int(rand()*50)}]
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# kill the replica connection on the master
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set killed [$master client kill type replica]
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set res [wait_for_log_messages -1 {"*Internal error in RDB*" "*Finished with success*" "*Successful partial resynchronization*"} $loglines 1000 1]
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if {$::verbose} { puts $res }
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set log_text [lindex $res 0]
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set loglines [lindex $res 1]
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if {![string match "*Internal error in RDB*" $log_text]} {
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# force the replica to try another full sync
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$master multi
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$master client kill type replica
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$master set asdf asdf
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# the side effect of resizing the backlog is that it is flushed (16k is the min size)
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$master config set repl-backlog-size [expr {16384 + $i}]
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$master exec
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}
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# wait for loading to stop (fail)
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wait_for_condition 1000 1 {
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[s -1 loading] eq 0
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} else {
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fail "Replica didn't disconnect"
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}
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}
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# enable fast shutdown
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$master config set rdb-key-save-delay 0
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}
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}
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}
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# get current stime and utime metrics for a thread (since it's creation)
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proc get_cpu_metrics { statfile } {
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if { [ catch {
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set fid [ open $statfile r ]
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set data [ read $fid 1024 ]
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::close $fid
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set data [ split $data ]
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;## number of jiffies it has been scheduled...
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set utime [ lindex $data 13 ]
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set stime [ lindex $data 14 ]
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} err ] } {
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error "assertion:can't parse /proc: $err"
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}
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set mstime [clock milliseconds]
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return [ list $mstime $utime $stime ]
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}
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# compute %utime and %stime of a thread between two measurements
|
|
proc compute_cpu_usage {start end} {
|
|
set clock_ticks [exec getconf CLK_TCK]
|
|
# convert ms time to jiffies and calc delta
|
|
set dtime [ expr { ([lindex $end 0] - [lindex $start 0]) * double($clock_ticks) / 1000 } ]
|
|
set utime [ expr { [lindex $end 1] - [lindex $start 1] } ]
|
|
set stime [ expr { [lindex $end 2] - [lindex $start 2] } ]
|
|
set pucpu [ expr { ($utime / $dtime) * 100 } ]
|
|
set pscpu [ expr { ($stime / $dtime) * 100 } ]
|
|
return [ list $pucpu $pscpu ]
|
|
}
|
|
|
|
|
|
# test diskless rdb pipe with multiple replicas, which may drop half way
|
|
start_server {tags {"repl"}} {
|
|
set master [srv 0 client]
|
|
$master config set repl-diskless-sync yes
|
|
$master config set repl-diskless-sync-delay 1
|
|
set master_host [srv 0 host]
|
|
set master_port [srv 0 port]
|
|
set master_pid [srv 0 pid]
|
|
# put enough data in the db that the rdb file will be bigger than the socket buffers
|
|
# and since we'll have key-load-delay of 100, 20000 keys will take at least 2 seconds
|
|
# we also need the replica to process requests during transfer (which it does only once in 2mb)
|
|
$master debug populate 20000 test 10000
|
|
$master config set rdbcompression no
|
|
# If running on Linux, we also measure utime/stime to detect possible I/O handling issues
|
|
set os [catch {exec unamee}]
|
|
set measure_time [expr {$os == "Linux"} ? 1 : 0]
|
|
foreach all_drop {no slow fast all timeout} {
|
|
test "diskless $all_drop replicas drop during rdb pipe" {
|
|
set replicas {}
|
|
set replicas_alive {}
|
|
# start one replica that will read the rdb fast, and one that will be slow
|
|
start_server {} {
|
|
lappend replicas [srv 0 client]
|
|
lappend replicas_alive [srv 0 client]
|
|
start_server {} {
|
|
lappend replicas [srv 0 client]
|
|
lappend replicas_alive [srv 0 client]
|
|
|
|
# start replication
|
|
# it's enough for just one replica to be slow, and have it's write handler enabled
|
|
# so that the whole rdb generation process is bound to that
|
|
set loglines [count_log_lines -1]
|
|
[lindex $replicas 0] config set repl-diskless-load swapdb
|
|
[lindex $replicas 0] config set key-load-delay 100
|
|
[lindex $replicas 0] replicaof $master_host $master_port
|
|
[lindex $replicas 1] replicaof $master_host $master_port
|
|
|
|
# wait for the replicas to start reading the rdb
|
|
# using the log file since the replica only responds to INFO once in 2mb
|
|
wait_for_log_messages -1 {"*Loading DB in memory*"} $loglines 800 10
|
|
|
|
if {$measure_time} {
|
|
set master_statfile "/proc/$master_pid/stat"
|
|
set master_start_metrics [get_cpu_metrics $master_statfile]
|
|
set start_time [clock seconds]
|
|
}
|
|
|
|
# wait a while so that the pipe socket writer will be
|
|
# blocked on write (since replica 0 is slow to read from the socket)
|
|
after 500
|
|
|
|
# add some command to be present in the command stream after the rdb.
|
|
$master incr $all_drop
|
|
|
|
# disconnect replicas depending on the current test
|
|
set loglines [count_log_lines -2]
|
|
if {$all_drop == "all" || $all_drop == "fast"} {
|
|
exec kill [srv 0 pid]
|
|
set replicas_alive [lreplace $replicas_alive 1 1]
|
|
}
|
|
if {$all_drop == "all" || $all_drop == "slow"} {
|
|
exec kill [srv -1 pid]
|
|
set replicas_alive [lreplace $replicas_alive 0 0]
|
|
}
|
|
if {$all_drop == "timeout"} {
|
|
$master config set repl-timeout 1
|
|
# we want this replica to hang on a key for very long so it'll reach repl-timeout
|
|
exec kill -SIGSTOP [srv -1 pid]
|
|
after 3000
|
|
}
|
|
|
|
# wait for rdb child to exit
|
|
wait_for_condition 500 100 {
|
|
[s -2 rdb_bgsave_in_progress] == 0
|
|
} else {
|
|
fail "rdb child didn't terminate"
|
|
}
|
|
|
|
# make sure we got what we were aiming for, by looking for the message in the log file
|
|
if {$all_drop == "all"} {
|
|
wait_for_log_messages -2 {"*Diskless rdb transfer, last replica dropped, killing fork child*"} $loglines 1 1
|
|
}
|
|
if {$all_drop == "no"} {
|
|
wait_for_log_messages -2 {"*Diskless rdb transfer, done reading from pipe, 2 replicas still up*"} $loglines 1 1
|
|
}
|
|
if {$all_drop == "slow" || $all_drop == "fast"} {
|
|
wait_for_log_messages -2 {"*Diskless rdb transfer, done reading from pipe, 1 replicas still up*"} $loglines 1 1
|
|
}
|
|
if {$all_drop == "timeout"} {
|
|
wait_for_log_messages -2 {"*Disconnecting timedout replica (full sync)*"} $loglines 1 1
|
|
wait_for_log_messages -2 {"*Diskless rdb transfer, done reading from pipe, 1 replicas still up*"} $loglines 1 1
|
|
# master disconnected the slow replica, remove from array
|
|
set replicas_alive [lreplace $replicas_alive 0 0]
|
|
# release it
|
|
exec kill -SIGCONT [srv -1 pid]
|
|
}
|
|
|
|
# make sure we don't have a busy loop going thought epoll_wait
|
|
if {$measure_time} {
|
|
set master_end_metrics [get_cpu_metrics $master_statfile]
|
|
set time_elapsed [expr {[clock seconds]-$start_time}]
|
|
set master_cpu [compute_cpu_usage $master_start_metrics $master_end_metrics]
|
|
set master_utime [lindex $master_cpu 0]
|
|
set master_stime [lindex $master_cpu 1]
|
|
if {$::verbose} {
|
|
puts "elapsed: $time_elapsed"
|
|
puts "master utime: $master_utime"
|
|
puts "master stime: $master_stime"
|
|
}
|
|
if {!$::no_latency && ($all_drop == "all" || $all_drop == "slow" || $all_drop == "timeout")} {
|
|
assert {$master_utime < 70}
|
|
assert {$master_stime < 70}
|
|
}
|
|
if {!$::no_latency && ($all_drop == "none" || $all_drop == "fast")} {
|
|
assert {$master_utime < 15}
|
|
assert {$master_stime < 15}
|
|
}
|
|
}
|
|
|
|
# verify the data integrity
|
|
foreach replica $replicas_alive {
|
|
# Wait that replicas acknowledge they are online so
|
|
# we are sure that DBSIZE and DEBUG DIGEST will not
|
|
# fail because of timing issues.
|
|
wait_for_condition 150 100 {
|
|
[lindex [$replica role] 3] eq {connected}
|
|
} else {
|
|
fail "replicas still not connected after some time"
|
|
}
|
|
|
|
# Make sure that replicas and master have same
|
|
# number of keys
|
|
wait_for_condition 50 100 {
|
|
[$master dbsize] == [$replica dbsize]
|
|
} else {
|
|
fail "Different number of keys between master and replicas after too long time."
|
|
}
|
|
|
|
# Check digests
|
|
set digest [$master debug digest]
|
|
set digest0 [$replica debug digest]
|
|
assert {$digest ne 0000000000000000000000000000000000000000}
|
|
assert {$digest eq $digest0}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
test "diskless replication child being killed is collected" {
|
|
# when diskless master is waiting for the replica to become writable
|
|
# it removes the read event from the rdb pipe so if the child gets killed
|
|
# the replica will hung. and the master may not collect the pid with wait3
|
|
start_server {tags {"repl"}} {
|
|
set master [srv 0 client]
|
|
set master_host [srv 0 host]
|
|
set master_port [srv 0 port]
|
|
set master_pid [srv 0 pid]
|
|
$master config set repl-diskless-sync yes
|
|
$master config set repl-diskless-sync-delay 0
|
|
# put enough data in the db that the rdb file will be bigger than the socket buffers
|
|
$master debug populate 20000 test 10000
|
|
$master config set rdbcompression no
|
|
start_server {} {
|
|
set replica [srv 0 client]
|
|
set loglines [count_log_lines 0]
|
|
$replica config set repl-diskless-load swapdb
|
|
$replica config set key-load-delay 1000000
|
|
$replica replicaof $master_host $master_port
|
|
|
|
# wait for the replicas to start reading the rdb
|
|
wait_for_log_messages 0 {"*Loading DB in memory*"} $loglines 800 10
|
|
|
|
# wait to be sure the eplica is hung and the master is blocked on write
|
|
after 500
|
|
|
|
# simulate the OOM killer or anyone else kills the child
|
|
set fork_child_pid [get_child_pid -1]
|
|
puts "fork child is $fork_child_pid"
|
|
exec kill -9 $fork_child_pid
|
|
|
|
# wait for the parent to notice the child have exited
|
|
wait_for_condition 50 100 {
|
|
[s -1 rdb_bgsave_in_progress] == 0
|
|
} else {
|
|
fail "rdb child didn't terminate"
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
test "diskless replication read pipe cleanup" {
|
|
# In diskless replication, we create a read pipe for the RDB, between the child and the parent.
|
|
# When we close this pipe (fd), the read handler also needs to be removed from the event loop (if it still registered).
|
|
# Otherwise, next time we will use the same fd, the registration will be fail (panic), because
|
|
# we will use EPOLL_CTL_MOD (the fd still register in the event loop), on fd that already removed from epoll_ctl
|
|
start_server {tags {"repl"}} {
|
|
set master [srv 0 client]
|
|
set master_host [srv 0 host]
|
|
set master_port [srv 0 port]
|
|
set master_pid [srv 0 pid]
|
|
$master config set repl-diskless-sync yes
|
|
$master config set repl-diskless-sync-delay 0
|
|
|
|
# put enough data in the db, and slowdown the save, to keep the parent busy at the read process
|
|
$master config set rdb-key-save-delay 100000
|
|
$master debug populate 20000 test 10000
|
|
$master config set rdbcompression no
|
|
start_server {} {
|
|
set replica [srv 0 client]
|
|
set loglines [count_log_lines 0]
|
|
$replica config set repl-diskless-load swapdb
|
|
$replica replicaof $master_host $master_port
|
|
|
|
# wait for the replicas to start reading the rdb
|
|
wait_for_log_messages 0 {"*Loading DB in memory*"} $loglines 800 10
|
|
|
|
set loglines [count_log_lines 0]
|
|
# send FLUSHALL so the RDB child will be killed
|
|
$master flushall
|
|
|
|
# wait for another RDB child process to be started
|
|
wait_for_log_messages -1 {"*Background RDB transfer started by pid*"} $loglines 800 10
|
|
|
|
# make sure master is alive
|
|
$master ping
|
|
}
|
|
}
|
|
}
|
|
|
|
test {replicaof right after disconnection} {
|
|
# this is a rare race condition that was reproduced sporadically by the psync2 unit.
|
|
# see details in #7205
|
|
start_server {tags {"repl"}} {
|
|
set replica1 [srv 0 client]
|
|
set replica1_host [srv 0 host]
|
|
set replica1_port [srv 0 port]
|
|
set replica1_log [srv 0 stdout]
|
|
start_server {} {
|
|
set replica2 [srv 0 client]
|
|
set replica2_host [srv 0 host]
|
|
set replica2_port [srv 0 port]
|
|
set replica2_log [srv 0 stdout]
|
|
start_server {} {
|
|
set master [srv 0 client]
|
|
set master_host [srv 0 host]
|
|
set master_port [srv 0 port]
|
|
$replica1 replicaof $master_host $master_port
|
|
$replica2 replicaof $master_host $master_port
|
|
|
|
wait_for_condition 50 100 {
|
|
[string match {*master_link_status:up*} [$replica1 info replication]] &&
|
|
[string match {*master_link_status:up*} [$replica2 info replication]]
|
|
} else {
|
|
fail "Can't turn the instance into a replica"
|
|
}
|
|
|
|
set rd [redis_deferring_client -1]
|
|
$rd debug sleep 1
|
|
after 100
|
|
|
|
# when replica2 will wake up from the sleep it will find both disconnection
|
|
# from it's master and also a replicaof command at the same event loop
|
|
$master client kill type replica
|
|
$replica2 replicaof $replica1_host $replica1_port
|
|
$rd read
|
|
|
|
wait_for_condition 50 100 {
|
|
[string match {*master_link_status:up*} [$replica2 info replication]]
|
|
} else {
|
|
fail "role change failed."
|
|
}
|
|
|
|
# make sure psync succeeded, and there were no unexpected full syncs.
|
|
assert_equal [status $master sync_full] 2
|
|
assert_equal [status $replica1 sync_full] 0
|
|
assert_equal [status $replica2 sync_full] 0
|
|
}
|
|
}
|
|
}
|
|
}
|