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e5cc2f92c4
Refactors Compute::prepare_and_run. It's split into subroutines differently, to make it easier to attach tracing spans to the different stages. The high-level logic for waiting for Postgres to exit is moved to the caller. Replace 'env_logger' with 'tracing', and add `#instrument` directives to different stages fo the startup process. This is a fairly mechanical change, except for the changes in 'spec.rs'. 'spec.rs' contained some complicated formatting, where parts of log messages were printed directly to stdout with `print`s. That was a bit messed up because the log normally goes to stderr, but those lines were printed to stdout. In our docker images, stderr and stdout both go to the same place so you wouldn't notice, but I don't think it was intentional. This changes the log format to the default 'tracing_subscriber::format' format. It's different from the Postgres log format, however, and because both compute_tools and Postgres print to the same log, it's now a mix of two different formats. I'm not sure how the Grafana log parsing pipeline can handle that. If it's a problem, we can build custom formatter to change the compute_tools log format to be the same as Postgres's, like it was before this commit, or we can change the Postgres log format to match tracing_formatter's, or we can start printing compute_tool's log output to a different destination than Postgres
256 lines
7.2 KiB
Python
256 lines
7.2 KiB
Python
import os
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from pathlib import Path
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from subprocess import TimeoutExpired
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from fixtures.log_helper import log
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from fixtures.neon_fixtures import ComputeCtl, NeonEnvBuilder, PgBin
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# Test that compute_ctl works and prints "--sync-safekeepers" logs.
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def test_sync_safekeepers_logs(neon_env_builder: NeonEnvBuilder, pg_bin: PgBin):
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neon_env_builder.num_safekeepers = 3
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env = neon_env_builder.init_start()
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ctl = ComputeCtl(env)
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env.neon_cli.create_branch("test_compute_ctl", "main")
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pg = env.postgres.create_start("test_compute_ctl")
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pg.safe_psql("CREATE TABLE t(key int primary key, value text)")
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with open(pg.config_file_path(), "r") as f:
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cfg_lines = f.readlines()
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cfg_map = {}
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for line in cfg_lines:
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if "=" in line:
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k, v = line.split("=")
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cfg_map[k] = v.strip("\n '\"")
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log.info(f"postgres config: {cfg_map}")
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pgdata = pg.pg_data_dir_path()
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pg_bin_path = os.path.join(pg_bin.pg_bin_path, "postgres")
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pg.stop_and_destroy()
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spec = (
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"""
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{
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"format_version": 1.0,
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"timestamp": "2021-05-23T18:25:43.511Z",
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"operation_uuid": "0f657b36-4b0f-4a2d-9c2e-1dcd615e7d8b",
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"cluster": {
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"cluster_id": "test-cluster-42",
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"name": "Neon Test",
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"state": "restarted",
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"roles": [
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],
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"databases": [
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],
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"settings": [
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{
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"name": "fsync",
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"value": "off",
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"vartype": "bool"
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},
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{
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"name": "wal_level",
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"value": "replica",
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"vartype": "enum"
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},
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{
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"name": "hot_standby",
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"value": "on",
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"vartype": "bool"
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},
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{
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"name": "neon.safekeepers",
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"value": """
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+ f'"{cfg_map["neon.safekeepers"]}"'
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+ """,
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"vartype": "string"
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},
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{
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"name": "wal_log_hints",
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"value": "on",
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"vartype": "bool"
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},
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{
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"name": "log_connections",
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"value": "on",
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"vartype": "bool"
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},
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{
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"name": "shared_buffers",
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"value": "32768",
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"vartype": "integer"
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},
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{
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"name": "port",
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"value": """
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+ f'"{cfg_map["port"]}"'
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+ """,
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"vartype": "integer"
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},
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{
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"name": "max_connections",
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"value": "100",
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"vartype": "integer"
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},
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{
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"name": "max_wal_senders",
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"value": "10",
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"vartype": "integer"
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},
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{
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"name": "listen_addresses",
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"value": "0.0.0.0",
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"vartype": "string"
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},
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{
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"name": "wal_sender_timeout",
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"value": "0",
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"vartype": "integer"
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},
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{
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"name": "password_encryption",
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"value": "md5",
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"vartype": "enum"
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},
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{
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"name": "maintenance_work_mem",
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"value": "65536",
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"vartype": "integer"
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},
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{
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"name": "max_parallel_workers",
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"value": "8",
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"vartype": "integer"
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},
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{
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"name": "max_worker_processes",
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"value": "8",
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"vartype": "integer"
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},
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{
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"name": "neon.tenant_id",
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"value": """
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+ f'"{cfg_map["neon.tenant_id"]}"'
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+ """,
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"vartype": "string"
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},
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{
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"name": "max_replication_slots",
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"value": "10",
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"vartype": "integer"
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},
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{
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"name": "neon.timeline_id",
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"value": """
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+ f'"{cfg_map["neon.timeline_id"]}"'
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+ """,
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"vartype": "string"
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},
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{
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"name": "shared_preload_libraries",
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"value": "neon",
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"vartype": "string"
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},
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{
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"name": "synchronous_standby_names",
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"value": "walproposer",
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"vartype": "string"
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},
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{
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"name": "neon.pageserver_connstring",
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"value": """
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+ f'"{cfg_map["neon.pageserver_connstring"]}"'
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+ """,
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"vartype": "string"
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}
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]
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},
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"delta_operations": [
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]
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}
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"""
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)
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ps_connstr = cfg_map["neon.pageserver_connstring"]
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log.info(f"ps_connstr: {ps_connstr}, pgdata: {pgdata}")
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# run compute_ctl and wait for 10s
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try:
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ctl.raw_cli(
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[
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"--connstr",
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"postgres://invalid/",
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"--pgdata",
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pgdata,
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"--spec",
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spec,
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"--pgbin",
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pg_bin_path,
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],
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timeout=10,
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)
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except TimeoutExpired as exc:
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ctl_logs = (exc.stderr or b"").decode("utf-8")
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log.info(f"compute_ctl stderr:\n{ctl_logs}")
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with ExternalProcessManager(Path(pgdata) / "postmaster.pid"):
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start = "starting safekeepers syncing"
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end = "safekeepers synced at LSN"
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start_pos = ctl_logs.index(start)
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assert start_pos != -1
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end_pos = ctl_logs.index(end, start_pos)
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assert end_pos != -1
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sync_safekeepers_logs = ctl_logs[start_pos : end_pos + len(end)]
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log.info("sync_safekeepers_logs:\n" + sync_safekeepers_logs)
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# assert that --sync-safekeepers logs are present in the output
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assert "connecting with node" in sync_safekeepers_logs
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assert "connected with node" in sync_safekeepers_logs
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assert "proposer connected to quorum (2)" in sync_safekeepers_logs
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assert "got votes from majority (2)" in sync_safekeepers_logs
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assert "sending elected msg to node" in sync_safekeepers_logs
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class ExternalProcessManager:
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"""
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Context manager that kills a process with a pid file on exit.
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"""
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def __init__(self, pid_file: Path):
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self.path = pid_file
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self.pid_file = open(pid_file, "r")
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self.pid = int(self.pid_file.readline().strip())
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def __enter__(self):
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return self
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def leave_alive(self):
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self.pid_file.close()
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def __exit__(self, _type, _value, _traceback):
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import signal
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import time
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if self.pid_file.closed:
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return
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with self.pid_file:
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try:
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os.kill(self.pid, signal.SIGTERM)
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except OSError as e:
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if not self.path.is_file():
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return
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log.info(f"Failed to kill {self.pid}, but the pidfile remains: {e}")
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return
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for _ in range(20):
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if not self.path.is_file():
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return
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time.sleep(0.2)
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log.info("Process failed to stop after SIGTERM: {self.pid}")
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os.kill(self.pid, signal.SIGKILL)
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