def engine_replica_mismatch(em_client, engine_rev_counter_disabled): # NOQA
rm_client = ProcessManagerClient(INSTANCE_MANAGER_REPLICA)
replica_dir1 = tempfile.mkdtemp()
replica_dir2 = tempfile.mkdtemp()
replica_process1 = create_replica_process(
rm_client,
REPLICA_NAME,
replica_dir=replica_dir1,
disable_revision_counter=engine_rev_counter_disabled)
grpc_replica_client1 = get_replica_client_with_delay(
ReplicaClient(get_process_address(replica_process1)))
grpc_replica_client1.replica_create(size=SIZE_STR)
replica_process2 = create_replica_process(
rm_client,
REPLICA_2_NAME,
replica_dir=replica_dir2,
disable_revision_counter=not engine_rev_counter_disabled)
grpc_replica_client2 = get_replica_client_with_delay(
ReplicaClient(get_process_address(replica_process2)))
grpc_replica_client2.replica_create(size=SIZE_STR)
engine_process = create_engine_process(
em_client, disable_revision_counter=engine_rev_counter_disabled)
grpc_controller_client = ControllerClient(
get_process_address(engine_process))
r1_url = grpc_replica_client1.url
r2_url = grpc_replica_client2.url
v = grpc_controller_client.volume_start(replicas=[
r1_url,
r2_url,
])
assert v.replicaCount == 2
# Check if replica1 is mode `ERR`
rs = grpc_controller_client.replica_list()
assert len(rs) == 2
r1_verified = False
r2_verified = False
for r in rs:
if r.address == r1_url:
assert r.mode == 'RW'
r1_verified = True
if r.address == r2_url:
assert r.mode == 'ERR'
r2_verified = True
assert r1_verified
assert r2_verified
cleanup_process(em_client)
cleanup_process(rm_client)
def test_single_replica_failure_during_engine_start(bin): # NOQA
"""
Test if engine still works fine if there is an invalid
replica/backend in the starting phase
1. Create then initialize 1 engine and 2 replicas.
2. Start the engine.
3. Create 2 snapshots.
4. Mess up the replica1 by manually modifying the snapshot meta file.
5. Mock volume detachment by deleting
the engine process and replicas processes.
6. Mock volume reattachment by recreating processes and
re-starting the engine.
7. Check if the engine is up and if replica1 is mode ERR
in the engine.
8. Check if the engine still works fine
by creating one more snapshot.
9. Remove the ERR replica from the engine
then check snapshot remove and snapshot purge work fine.
10. Check if the snapshot list is correct.
"""
em_client = ProcessManagerClient(INSTANCE_MANAGER_ENGINE)
engine_process = create_engine_process(em_client)
grpc_controller_client = ControllerClient(
get_process_address(engine_process))
rm_client = ProcessManagerClient(INSTANCE_MANAGER_REPLICA)
replica_dir1 = tempfile.mkdtemp()
replica_dir2 = tempfile.mkdtemp()
replica_process1 = create_replica_process(rm_client, REPLICA_NAME,
replica_dir=replica_dir1)
grpc_replica_client1 = ReplicaClient(
get_process_address(replica_process1))
time.sleep(3)
cleanup_replica(grpc_replica_client1)
replica_process2 = create_replica_process(rm_client, REPLICA_2_NAME,
replica_dir=replica_dir2)
grpc_replica_client2 = ReplicaClient(
get_process_address(replica_process2))
time.sleep(3)
cleanup_replica(grpc_replica_client2)
open_replica(grpc_replica_client1)
open_replica(grpc_replica_client2)
r1_url = grpc_replica_client1.url
r2_url = grpc_replica_client2.url
v = grpc_controller_client.volume_start(replicas=[
r1_url, r2_url,
])
assert v.replicaCount == 2
cmd = [bin, '--url', grpc_controller_client.address,
'snapshot', 'create']
snap0 = subprocess.check_output(cmd, encoding='utf-8').strip()
expected = grpc_replica_client1.replica_get().chain[1]
assert expected == 'volume-snap-{}.img'.format(snap0)
cmd = [bin, '--url', grpc_controller_client.address,
'snapshot', 'create',
'--label', 'name=snap1', '--label', 'key=value']
snap1 = subprocess.check_output(cmd, encoding='utf-8').strip()
# Mess up the replica1 by manually modifying the snapshot meta file
r1_snap1_meta_path = os.path.join(replica_dir1,
'volume-snap-{}.img.meta'.format(snap1))
with open(r1_snap1_meta_path, 'r') as f:
snap1_meta_info = json.load(f)
with open(r1_snap1_meta_path, 'w') as f:
snap1_meta_info["Parent"] = "invalid-parent.img"
json.dump(snap1_meta_info, f)
# Mock detach:
cleanup_process(em_client)
cleanup_process(rm_client)
# Mock reattach:
# 1. Directly create replicas processes.
# 2. Call replica_create() to init replica servers for replica processes.
# 3. Create one engine process and start the engine with replicas.
replica_process1 = create_replica_process(rm_client, REPLICA_NAME,
replica_dir=replica_dir1)
grpc_replica_client1 = ReplicaClient(
get_process_address(replica_process1))
time.sleep(3)
grpc_replica_client1.replica_create(size=SIZE_STR)
replica_process2 = create_replica_process(rm_client, REPLICA_2_NAME,
replica_dir=replica_dir2)
grpc_replica_client2 = ReplicaClient(
get_process_address(replica_process2))
time.sleep(3)
grpc_replica_client2.replica_create(size=SIZE_STR)
engine_process = create_engine_process(em_client)
grpc_controller_client = ControllerClient(
get_process_address(engine_process))
r1_url = grpc_replica_client1.url
r2_url = grpc_replica_client2.url
v = grpc_controller_client.volume_start(replicas=[
r1_url, r2_url,
])
assert v.replicaCount == 2
# Check if replica1 is mode `ERR`
rs = grpc_controller_client.replica_list()
assert len(rs) == 2
r1_verified = False
r2_verified = False
for r in rs:
if r.address == r1_url:
assert r.mode == 'ERR'
r1_verified = True
if r.address == r2_url:
assert r.mode == 'RW'
r2_verified = True
assert r1_verified
assert r2_verified
# The engine still works fine
cmd = [bin, '--url', grpc_controller_client.address,
'snapshot', 'create']
snap2 = subprocess.check_output(cmd, encoding='utf-8').strip()
# Remove the ERR replica before removing snapshots
grpc_controller_client.replica_delete(r1_url)
rs = grpc_controller_client.replica_list()
assert len(rs) == 1
assert rs[0].address == r2_url
assert rs[0].mode == "RW"
cmd = [bin, '--url', grpc_controller_client.address,
'snapshot', 'rm', snap1]
subprocess.check_call(cmd)
cmd = [bin, '--url', grpc_controller_client.address,
'snapshot', 'purge']
subprocess.check_call(cmd)
wait_for_purge_completion(grpc_controller_client.address)
cmd = [bin, '--debug',
'--url', grpc_controller_client.address,
'snapshot', 'ls']
ls_output = subprocess.check_output(cmd, encoding='utf-8')
assert ls_output == '''ID
{}
{}
'''.format(snap2, snap0)
cleanup_process(em_client)
cleanup_process(rm_client)