def test_ha_revision_counter_consistency(
grpc_controller, # NOQA
grpc_replica1,
grpc_replica2): # NOQA
open_replica(grpc_replica1)
open_replica(grpc_replica2)
replicas = grpc_controller.replica_list()
assert len(replicas) == 0
r1_url = grpc_replica1.url
r2_url = grpc_replica2.url
v = grpc_controller.volume_start(replicas=[r1_url, r2_url])
assert v.name == VOLUME_NAME
assert v.replicaCount == 2
replicas = grpc_controller.replica_list()
assert len(replicas) == 2
assert replicas[0].mode == "RW"
assert replicas[1].mode == "RW"
dev = get_blockdev(VOLUME_NAME)
verify_async(dev, 10, 128, 100)
r1 = grpc_replica1.replica_get()
r2 = grpc_replica2.replica_get()
# kernel can merge requests so backend may not receive 1000 writes
assert r1.revisionCounter > 0
assert r1.revisionCounter == r2.revisionCounter
def test_ha_single_replica_failure(
grpc_controller, # NOQA
grpc_replica1,
grpc_replica2): # NOQA
open_replica(grpc_replica1)
open_replica(grpc_replica2)
replicas = grpc_controller.replica_list()
assert len(replicas) == 0
r1_url = grpc_replica1.url
r2_url = grpc_replica2.url
v = grpc_controller.volume_start(replicas=[r1_url, r2_url])
assert v.replicaCount == 2
replicas = grpc_controller.replica_list()
assert len(replicas) == 2
assert replicas[0].mode == "RW"
assert replicas[1].mode == "RW"
dev = get_blockdev(VOLUME_NAME)
data = random_string(128)
data_offset = 1024
verify_data(dev, data_offset, data)
cleanup_replica(grpc_replica2)
verify_async(dev, 10, 128, 1)
verify_replica_state(grpc_controller, r2_url, "ERR")
verify_read(dev, data_offset, data)
def test_snapshot_tree_rebuild(
grpc_controller, # NOQA
grpc_replica1,
grpc_replica2): # NOQA
address = grpc_controller.address
offset = 0
length = 128
open_replica(grpc_replica1)
open_replica(grpc_replica2)
replicas = grpc_controller.replica_list()
assert len(replicas) == 0
r1_url = grpc_replica1.url
r2_url = grpc_replica2.url
v = grpc_controller.volume_start(replicas=[r1_url, r2_url])
assert v.name == VOLUME_NAME
assert v.replicaCount == 2
replicas = grpc_controller.replica_list()
assert len(replicas) == 2
assert replicas[0].mode == "RW"
assert replicas[1].mode == "RW"
dev = get_blockdev(VOLUME_NAME)
snap, snap_data = snapshot_tree_build(dev, address, ENGINE_NAME, offset,
length)
data = random_string(128)
data_offset = 1024
verify_data(dev, data_offset, data)
# Cleanup replica2
cleanup_replica(grpc_replica2)
verify_async(dev, 10, 128, 1)
verify_replica_state(grpc_controller, r2_url, "ERR")
verify_read(dev, data_offset, data)
grpc_controller.replica_delete(replicas[1].address)
# Rebuild replica2
open_replica(grpc_replica2)
cmd.add_replica(address, r2_url)
wait_for_rebuild_complete(address)
verify_async(dev, 10, 128, 1)
verify_replica_state(grpc_controller, r2_url, "RW")
snapshot_tree_verify(dev, address, ENGINE_NAME, offset, length, snap,
snap_data)
def test_ha_single_replica_rebuild(
grpc_controller, # NOQA
grpc_replica1,
grpc_replica2): # NOQA
address = grpc_controller.address
open_replica(grpc_replica1)
open_replica(grpc_replica2)
replicas = grpc_controller.replica_list()
assert len(replicas) == 0
r1_url = grpc_replica1.url
r2_url = grpc_replica2.url
v = grpc_controller.volume_start(replicas=[r1_url, r2_url])
assert v.replicaCount == 2
replicas = grpc_controller.replica_list()
assert len(replicas) == 2
assert replicas[0].mode == "RW"
assert replicas[1].mode == "RW"
dev = get_blockdev(VOLUME_NAME)
data = random_string(128)
data_offset = 1024
verify_data(dev, data_offset, data)
# Cleanup replica2
cleanup_replica(grpc_replica2)
verify_async(dev, 10, 128, 1)
verify_replica_state(grpc_controller, r2_url, "ERR")
verify_read(dev, data_offset, data)
grpc_controller.replica_delete(replicas[1].address)
# Rebuild replica2
open_replica(grpc_replica2)
cmd.add_replica(address, r2_url)
wait_for_rebuild_complete(address)
verify_async(dev, 10, 128, 1)
verify_replica_state(grpc_controller, r2_url, "RW")
verify_read(dev, data_offset, data)
# WORKAROUND for unable to remove the parent of volume head
newsnap = cmd.snapshot_create(address)
info = cmd.snapshot_info(address)
assert len(info) == 3
sysnap = info[newsnap]["parent"]
assert info[sysnap]["parent"] == ""
assert newsnap in info[sysnap]["children"]
assert info[sysnap]["usercreated"] is False
assert info[sysnap]["removed"] is False
cmd.snapshot_purge(address)
wait_for_purge_completion(address)
info = cmd.snapshot_info(address)
assert len(info) == 2
assert info[newsnap] is not None
assert info[VOLUME_HEAD] is not None
def test_ha_double_replica_rebuild(
grpc_controller, # NOQA
grpc_replica1,
grpc_replica2): # NOQA
open_replica(grpc_replica1)
open_replica(grpc_replica2)
replicas = grpc_controller.replica_list()
assert len(replicas) == 0
r1_url = grpc_replica1.url
r2_url = grpc_replica2.url
v = grpc_controller.volume_start(replicas=[r1_url, r2_url])
assert v.name == VOLUME_NAME
assert v.replicaCount == 2
replicas = grpc_controller.replica_list()
assert len(replicas) == 2
assert replicas[0].mode == "RW"
assert replicas[1].mode == "RW"
dev = get_blockdev(VOLUME_NAME)
data1 = random_string(128)
data1_offset = 1024
verify_data(dev, data1_offset, data1)
# Close replica2
r2 = grpc_replica2.replica_get()
assert r2.revisionCounter == 1
grpc_replica2.replica_close()
verify_async(dev, 10, 128, 1)
verify_replica_state(grpc_controller, r2_url, "ERR")
verify_read(dev, data1_offset, data1)
data2 = random_string(128)
data2_offset = 512
verify_data(dev, data2_offset, data2)
# Close replica1
r1 = grpc_replica1.replica_get()
assert r1.revisionCounter == 12 # 1 + 10 + 1
grpc_replica1.replica_close()
# Restart volume
cleanup_controller(grpc_controller)
replicas = grpc_controller.replica_list()
assert len(replicas) == 0
# NOTE the order is reversed here
r1_url = grpc_replica1.url
r2_url = grpc_replica2.url
v = grpc_controller.volume_start(replicas=[r2_url, r1_url])
assert v.replicaCount == 2
# replica2 is out because of lower revision counter
replicas = grpc_controller.replica_list()
assert len(replicas) == 2
assert replicas[0].mode == "ERR"
assert replicas[1].mode == "RW"
verify_read(dev, data1_offset, data1)
verify_read(dev, data2_offset, data2)
# Rebuild replica2
r2 = grpc_replica2.replica_get()
assert r2.revisionCounter == 1
grpc_replica2.replica_close()
grpc_controller.replica_delete(replicas[0].address)
cmd.add_replica(grpc_controller.address, r2_url)
wait_for_rebuild_complete(grpc_controller.address)
verify_async(dev, 10, 128, 1)
verify_replica_state(grpc_controller, r2_url, "RW")
verify_read(dev, data1_offset, data1)
verify_read(dev, data2_offset, data2)
r1 = grpc_replica1.replica_get()
r2 = grpc_replica2.replica_get()
assert r1.revisionCounter == 22 # 1 + 10 + 1 + 10
assert r2.revisionCounter == 22 # must be in sync with r1
