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5bd8e2363a
This will help to keep us from using deprecated Python features going forward. Signed-off-by: Tristan Partin <tristan@neon.tech>
69 lines
2.5 KiB
Python
69 lines
2.5 KiB
Python
from __future__ import annotations
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import threading
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import time
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from contextlib import closing
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import psycopg2.errors
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from fixtures.log_helper import log
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from fixtures.neon_fixtures import NeonEnv, PgBin
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# Test updating neon.pageserver_connstring setting on the fly.
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#
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# This merely changes some whitespace in the connection string, so
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# this doesn't prove that the new string actually takes effect. But at
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# least the code gets exercised.
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def test_pageserver_reconnect(neon_simple_env: NeonEnv, pg_bin: PgBin):
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env = neon_simple_env
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env.create_branch("test_pageserver_restarts")
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endpoint = env.endpoints.create_start("test_pageserver_restarts")
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n_reconnects = 1000
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timeout = 0.01
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scale = 10
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def run_pgbench(connstr: str):
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log.info(f"Start a pgbench workload on pg {connstr}")
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pg_bin.run_capture(["pgbench", "-i", "-I", "dtGvp", f"-s{scale}", connstr])
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pg_bin.run_capture(["pgbench", f"-T{int(n_reconnects*timeout)}", connstr])
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thread = threading.Thread(target=run_pgbench, args=(endpoint.connstr(),), daemon=True)
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thread.start()
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with closing(endpoint.connect()) as con:
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with con.cursor() as c:
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c.execute("SELECT setting FROM pg_settings WHERE name='neon.pageserver_connstring'")
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connstring = c.fetchall()[0][0]
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for i in range(n_reconnects):
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time.sleep(timeout)
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c.execute(
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"alter system set neon.pageserver_connstring=%s",
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(connstring + (" " * (i % 2)),),
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)
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c.execute("select pg_reload_conf()")
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thread.join()
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# Test handling errors during page server reconnect
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def test_pageserver_reconnect_failure(neon_simple_env: NeonEnv):
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env = neon_simple_env
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env.create_branch("test_pageserver_reconnect")
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endpoint = env.endpoints.create_start("test_pageserver_reconnect")
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con = endpoint.connect()
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cur = con.cursor()
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cur.execute("set statement_timeout='2s'")
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cur.execute("SELECT setting FROM pg_settings WHERE name='neon.pageserver_connstring'")
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connstring = cur.fetchall()[0][0]
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cur.execute(
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f"alter system set neon.pageserver_connstring='{connstring}?some_invalid_param=xyz'"
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)
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cur.execute("select pg_reload_conf()")
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try:
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cur.execute("select count(*) from pg_class")
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except psycopg2.errors.QueryCanceled:
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log.info("Connection to PS failed")
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assert not endpoint.log_contains("ERROR: cannot wait on socket event without a socket.*")
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