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fix(syslogd): raise the imjournal rate limit so one noisy service cannot drop events (3.1.20) #203

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fix(syslogd): raise the imjournal rate limit so one noisy service cannot drop events (3.1.20) #203

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8 changes: 7 additions & 1 deletion src/modules/config_syslogd.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -34,7 +34,13 @@ UpdateConfig(const char* filepath)
return false;

fprintf(fout, "module(load=\"imuxsock\" SysSock.Use=\"off\")\n");
fprintf(fout, "module(load=\"imjournal\" StateFile=\"imjournal.state\")\n");
// imjournal applies one budget to every journal entry, so a single noisy service
// used up the default 20000 per 600s and hex_log_event events were dropped with
// the rest (cubecos#2064). journald already rate-limits each service on its own;
// this budget is only a backstop. cube36 (3 control nodes, 14 days): normal
// traffic peaked at ~3,100 per 600s at boot, a keystone traceback flood at
// ~200,000 per 600s.
fprintf(fout, "module(load=\"imjournal\" StateFile=\"imjournal.state\" Ratelimit.Interval=\"600\" Ratelimit.Burst=\"300000\")\n");
fprintf(fout, "\n");
fprintf(fout, "global(workDirectory=\"/var/lib/rsyslog\")\n");
fprintf(fout, "\n");
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