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postgres: readiness probe

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This commit is contained in:
Sridhar Ratnakumar 2023-06-21 11:09:04 -04:00
parent 27c3221de2
commit 20b63ecf79
2 changed files with 12 additions and 2 deletions
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13
nix/postgres.nix
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@ -270,8 +270,9 @@ in
text = ''
set -x
export PATH="${postgresPkg}"/bin:$PATH
export LOCKDIR="/tmp"
postgres -k "$LOCKDIR" -D ${cfg.dataDir}
PGDATA=$(readlink -f "${cfg.dataDir}")
export PGDATA
postgres -k "$PGDATA"
'';
};
in
@ -280,6 +281,14 @@ in
depends_on."${cfg.name}-init".condition = "process_completed_successfully";
# SIGINT (= 2) for faster shutdown: https://www.postgresql.org/docs/current/server-shutdown.html
shutdown.signal = 2;
readiness_probe = {
exec.command = "${postgresPkg}/bin/pg_isready -h $(readlink -f ${cfg.dataDir}) -d template1";
initial_delay_seconds = 2;
period_seconds = 10;
timeout_seconds = 4;
success_threshold = 1;
failure_threshold = 5;
};
# https://github.com/F1bonacc1/process-compose#-auto-restart-if-not-healthy
availability.restart = "on_failure";
};

1
nix/postgres_test.nix
View File

@ -5,6 +5,7 @@
};
testScript = ''
process_compose.wait_until(lambda procs:
# TODO: Check for 'ready'
procs["postgres"]["status"] == "Running"
)
machine.succeed("echo 'SELECT version();' | ${config.services.postgres.package}/bin/psql -h 127.0.0.1 -U tester")