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# Test conditions where an instance is considered to be down
source "../tests/includes/init-tests.tcl"
proc ensure_master_up {} {
wait_for_condition 1000 50 {
[dict get [S 4 sentinel master mymaster] flags] eq "master"
} else {
fail "Master flags are not just 'master'"
}
}
proc ensure_master_down {} {
wait_for_condition 1000 50 {
[string match *down* \
[dict get [S 4 sentinel master mymaster] flags]]
} else {
fail "Master is not flagged SDOWN"
}
}
test "Crash the majority of Sentinels to prevent failovers for this unit" {
for {set id 0} {$id < $quorum} {incr id} {
kill_instance sentinel $id
}
}
test "SDOWN is triggered by non-responding but not crashed instance" {
lassign [S 4 SENTINEL GET-MASTER-ADDR-BY-NAME mymaster] host port
ensure_master_up
exec ../../../src/redis-cli -h $host -p $port debug sleep 10 > /dev/null &
ensure_master_down
ensure_master_up
}
test "SDOWN is triggered by crashed instance" {
lassign [S 4 SENTINEL GET-MASTER-ADDR-BY-NAME mymaster] host port
ensure_master_up
kill_instance redis 0
ensure_master_down
restart_instance redis 0
ensure_master_up
}
test "SDOWN is triggered by masters advertising as slaves" {
ensure_master_up
R 0 slaveof 127.0.0.1 34567
ensure_master_down
R 0 slaveof no one
ensure_master_up
}
test "SDOWN is triggered by misconfigured instance repling with errors" {
ensure_master_up
set orig_dir [lindex [R 0 config get dir] 1]
set orig_save [lindex [R 0 config get save] 1]
# Set dir to / and filename to "tmp" to make sure it will fail.
R 0 config set dir /
R 0 config set dbfilename tmp
R 0 config set save "1000000 1000000"
R 0 bgsave
ensure_master_down
R 0 config set save $orig_save
R 0 config set dir $orig_dir
R 0 config set dbfilename dump.rdb
R 0 bgsave
ensure_master_up
}
# We use this test setup to also test command renaming, as a side
# effect of the master going down if we send PONG instead of PING
test "SDOWN is triggered if we rename PING to PONG" {
ensure_master_up
S 4 SENTINEL SET mymaster rename-command PING PONG
ensure_master_down
S 4 SENTINEL SET mymaster rename-command PING PING
ensure_master_up
}
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