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Cluster regression test for #3043.
The test works but is very slow so far, since it involves resharding 1/5 of all the cluster slots from master 0 to the other 4 masters and back into the original master.
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tests/cluster/tests/12-replica-migration-2.tcl
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61
tests/cluster/tests/12-replica-migration-2.tcl
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# Replica migration test #2.
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#
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# Check that the status of master that can be targeted by replica migration
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# is acquired again, after being getting slots again, in a cluster where the
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# other masters have slaves.
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source "../tests/includes/init-tests.tcl"
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# Create a cluster with 5 master and 10 slaves, so that we have 2
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# slaves for each master.
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test "Create a 5 nodes cluster" {
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create_cluster 5 10
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}
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test "Cluster is up" {
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assert_cluster_state ok
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}
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test "Each master should have two replicas attached" {
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foreach_redis_id id {
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if {$id < 5} {
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wait_for_condition 1000 50 {
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[llength [lindex [R 0 role] 2]] == 2
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} else {
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fail "Master #$id does not have 2 slaves as expected"
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}
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}
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}
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}
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set master0_id [dict get [get_myself 0] id]
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test "Resharding all the master #0 slots away from it" {
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set output [exec \
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../../../src/redis-trib.rb rebalance \
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--weight ${master0_id}=0 \
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127.0.0.1:[get_instance_attrib redis 0 port] >@ stdout]
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}
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test "Master #0 should lose its replicas" {
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wait_for_condition 1000 50 {
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[llength [lindex [R 0 role] 2]] == 0
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} else {
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fail "Master #0 still has replicas"
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}
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}
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test "Resharding all the master #0 slots back to it" {
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set output [exec \
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../../../src/redis-trib.rb rebalance \
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--weight ${master0_id}=1 \
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--use-empty-masters \
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127.0.0.1:[get_instance_attrib redis 0 port]]
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}
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test "Master #0 should re-acquire one or more replicas" {
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wait_for_condition 1000 50 {
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[llength [lindex [R 0 role] 2]] >= 1
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} else {
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fail "Master #0 has no has replicas"
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}
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}
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