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# Copyright 2024 Redpanda Data, Inc. | ||
# | ||
# Use of this software is governed by the Business Source License | ||
# included in the file licenses/BSL.md | ||
# | ||
# As of the Change Date specified in that file, in accordance with | ||
# the Business Source License, use of this software will be governed | ||
# by the Apache License, Version 2.0 | ||
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import concurrent.futures | ||
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from ducktape.mark import matrix | ||
from ducktape.utils.util import wait_until | ||
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from rptest.services.cluster import cluster | ||
from rptest.services.admin import Admin | ||
from rptest.clients.rpk import RpkTool | ||
from rptest.tests.redpanda_test import RedpandaTest | ||
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class ShardBalanceTest(RedpandaTest): | ||
def __init__(self, *args, **kwargs): | ||
super().__init__(*args, num_brokers=5, **kwargs) | ||
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def setUp(self): | ||
# start the nodes manually | ||
pass | ||
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def get_topic_shard_counts(self, node): | ||
core_count = self.redpanda.get_node_cpu_count() | ||
partitions = Admin(self.redpanda).get_partitions(node=node) | ||
topic2shard2count = dict() | ||
for p in partitions: | ||
topic2shard2count.setdefault( | ||
p["topic"], list(0 for _ in range(core_count)))[p["core"]] += 1 | ||
return topic2shard2count | ||
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@cluster(num_nodes=5) | ||
def test_node_join(self): | ||
seed_nodes = self.redpanda.nodes[0:3] | ||
joiner_nodes = self.redpanda.nodes[3:] | ||
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self.redpanda.add_extra_rp_conf({"flex_core_assignment": True}) | ||
self.redpanda.start(nodes=seed_nodes) | ||
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admin = Admin(self.redpanda, default_node=seed_nodes[0]) | ||
rpk = RpkTool(self.redpanda) | ||
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topics = ["foo", "bar", "quux"] | ||
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for topic in topics: | ||
self.logger.warn(f"creating topic {topic}...") | ||
rpk.create_topic(topic, partitions=20, replicas=3) | ||
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for p in range(20): | ||
admin.set_partition_replica_core(topic="foo", | ||
partition=p, | ||
replica=3, | ||
core=0, | ||
node=seed_nodes[p % 3]) | ||
import time | ||
time.sleep(1) | ||
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def print_shard_counts(nodes): | ||
all_topics = ["controller"] + topics | ||
core_count = self.redpanda.get_node_cpu_count() | ||
max_len = max(len(t) for t in all_topics) | ||
for n in nodes: | ||
self.logger.warn( | ||
f"shard replica counts on node {self.redpanda.node_id(n)}:" | ||
) | ||
topic2shard2count = self.get_topic_shard_counts(n) | ||
total_counts = list(0 for _ in range(core_count)) | ||
for t in all_topics: | ||
counts = topic2shard2count.get( | ||
t, list(0 for _ in range(core_count))) | ||
for i, c in enumerate(counts): | ||
total_counts[i] += c | ||
padding = ' ' * (max_len - len(t) + 2) | ||
self.logger.warn(f"{t + padding}: {counts}") | ||
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self.logger.warn(f"total: {total_counts}") | ||
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self.logger.warn("BEFORE node join:") | ||
print_shard_counts(seed_nodes) | ||
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self.logger.warn(f"adding nodes 4, 5 and waiting for rebalance...") | ||
self.redpanda.start(nodes=joiner_nodes) | ||
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def rebalance_finished(): | ||
in_progress = admin.list_reconfigurations(node=seed_nodes[0]) | ||
self.logger.debug( | ||
f"current number of reconfigurations: {len(in_progress)}") | ||
if len(in_progress) > 0: | ||
return False | ||
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partitions_on_joiners = [ | ||
len(admin.get_partitions(node=n)) for n in joiner_nodes | ||
] | ||
self.logger.debug( | ||
f"partitions on joiners: {partitions_on_joiners}") | ||
return min(partitions_on_joiners) > 5 | ||
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wait_until(rebalance_finished, timeout_sec=60, backoff_sec=5) | ||
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self.logger.warn("AFTER nodes joined:") | ||
print_shard_counts(self.redpanda.nodes) |