mirror of
https://github.com/neondatabase/neon.git
synced 2026-01-08 05:52:55 +00:00
46d30bf054
If there are any unexpected ERRORs or WARNs in pageserver.log after test finishes, fail the test. This requires whitelisting the errors that *are* expected in each test, and there's also a few common errors that are printed by most tests, which are whitelisted in the fixture itself. With this, we don't need the special abort() call in testing mode, when compaction or GC fails. Those failures will print ERRORs to the logs, which will be picked up by this new mechanisms. A bunch of errors are currently whitelisted that we probably shouldn't be emitting in the first place, but fixing those is out of scope for this commit, so I just left FIXME comments on them.
127 lines
4.8 KiB
Python
127 lines
4.8 KiB
Python
import pytest
|
|
from fixtures.log_helper import log
|
|
from fixtures.neon_fixtures import NeonEnvBuilder
|
|
from fixtures.types import Lsn, TimelineId
|
|
from fixtures.utils import print_gc_result, query_scalar
|
|
|
|
|
|
#
|
|
# Create a couple of branches off the main branch, at a historical point in time.
|
|
#
|
|
def test_branch_behind(neon_env_builder: NeonEnvBuilder):
|
|
# Disable pitr, because here we want to test branch creation after GC
|
|
neon_env_builder.pageserver_config_override = "tenant_config={pitr_interval = '0 sec'}"
|
|
env = neon_env_builder.init_start()
|
|
|
|
env.pageserver.allowed_errors.append(".*invalid branch start lsn.*")
|
|
env.pageserver.allowed_errors.append(".*invalid start lsn .* for ancestor timeline.*")
|
|
|
|
# Branch at the point where only 100 rows were inserted
|
|
env.neon_cli.create_branch("test_branch_behind")
|
|
pgmain = env.postgres.create_start("test_branch_behind")
|
|
log.info("postgres is running on 'test_branch_behind' branch")
|
|
|
|
main_cur = pgmain.connect().cursor()
|
|
|
|
timeline = TimelineId(query_scalar(main_cur, "SHOW neon.timeline_id"))
|
|
|
|
# Create table, and insert the first 100 rows
|
|
main_cur.execute("CREATE TABLE foo (t text)")
|
|
|
|
# keep some early lsn to test branch creation on out of date lsn
|
|
gced_lsn = Lsn(query_scalar(main_cur, "SELECT pg_current_wal_insert_lsn()"))
|
|
|
|
main_cur.execute(
|
|
"""
|
|
INSERT INTO foo
|
|
SELECT 'long string to consume some space' || g
|
|
FROM generate_series(1, 100) g
|
|
"""
|
|
)
|
|
lsn_a = Lsn(query_scalar(main_cur, "SELECT pg_current_wal_insert_lsn()"))
|
|
log.info(f"LSN after 100 rows: {lsn_a}")
|
|
|
|
# Insert some more rows. (This generates enough WAL to fill a few segments.)
|
|
main_cur.execute(
|
|
"""
|
|
INSERT INTO foo
|
|
SELECT 'long string to consume some space' || g
|
|
FROM generate_series(1, 200000) g
|
|
"""
|
|
)
|
|
lsn_b = Lsn(query_scalar(main_cur, "SELECT pg_current_wal_insert_lsn()"))
|
|
log.info(f"LSN after 200100 rows: {lsn_b}")
|
|
|
|
# Branch at the point where only 100 rows were inserted
|
|
env.neon_cli.create_branch(
|
|
"test_branch_behind_hundred", "test_branch_behind", ancestor_start_lsn=lsn_a
|
|
)
|
|
|
|
# Insert many more rows. This generates enough WAL to fill a few segments.
|
|
main_cur.execute(
|
|
"""
|
|
INSERT INTO foo
|
|
SELECT 'long string to consume some space' || g
|
|
FROM generate_series(1, 200000) g
|
|
"""
|
|
)
|
|
lsn_c = Lsn(query_scalar(main_cur, "SELECT pg_current_wal_insert_lsn()"))
|
|
|
|
log.info(f"LSN after 400100 rows: {lsn_c}")
|
|
|
|
# Branch at the point where only 200100 rows were inserted
|
|
env.neon_cli.create_branch(
|
|
"test_branch_behind_more", "test_branch_behind", ancestor_start_lsn=lsn_b
|
|
)
|
|
|
|
pg_hundred = env.postgres.create_start("test_branch_behind_hundred")
|
|
pg_more = env.postgres.create_start("test_branch_behind_more")
|
|
|
|
# On the 'hundred' branch, we should see only 100 rows
|
|
hundred_cur = pg_hundred.connect().cursor()
|
|
assert query_scalar(hundred_cur, "SELECT count(*) FROM foo") == 100
|
|
|
|
# On the 'more' branch, we should see 100200 rows
|
|
more_cur = pg_more.connect().cursor()
|
|
assert query_scalar(more_cur, "SELECT count(*) FROM foo") == 200100
|
|
|
|
# All the rows are visible on the main branch
|
|
assert query_scalar(main_cur, "SELECT count(*) FROM foo") == 400100
|
|
|
|
# Check bad lsn's for branching
|
|
|
|
# branch at segment boundary
|
|
env.neon_cli.create_branch(
|
|
"test_branch_segment_boundary", "test_branch_behind", ancestor_start_lsn=Lsn("0/3000000")
|
|
)
|
|
pg = env.postgres.create_start("test_branch_segment_boundary")
|
|
assert pg.safe_psql("SELECT 1")[0][0] == 1
|
|
|
|
# branch at pre-initdb lsn
|
|
with pytest.raises(Exception, match="invalid branch start lsn: .*"):
|
|
env.neon_cli.create_branch("test_branch_preinitdb", ancestor_start_lsn=Lsn("0/42"))
|
|
|
|
# branch at pre-ancestor lsn
|
|
with pytest.raises(Exception, match="less than timeline ancestor lsn"):
|
|
env.neon_cli.create_branch(
|
|
"test_branch_preinitdb", "test_branch_behind", ancestor_start_lsn=Lsn("0/42")
|
|
)
|
|
|
|
# check that we cannot create branch based on garbage collected data
|
|
with env.pageserver.http_client() as pageserver_http:
|
|
gc_result = pageserver_http.timeline_gc(env.initial_tenant, timeline, 0)
|
|
print_gc_result(gc_result)
|
|
|
|
with pytest.raises(Exception, match="invalid branch start lsn: .*"):
|
|
# this gced_lsn is pretty random, so if gc is disabled this woudln't fail
|
|
env.neon_cli.create_branch(
|
|
"test_branch_create_fail", "test_branch_behind", ancestor_start_lsn=gced_lsn
|
|
)
|
|
|
|
# check that after gc everything is still there
|
|
assert query_scalar(hundred_cur, "SELECT count(*) FROM foo") == 100
|
|
|
|
assert query_scalar(more_cur, "SELECT count(*) FROM foo") == 200100
|
|
|
|
assert query_scalar(main_cur, "SELECT count(*) FROM foo") == 400100
|