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173caa42aa
As proposed in #8857, this adds a Logger subclass that writes structured log messages via journald's native protocol by calling sd_journal_sendv. The feature therefore depends on the systemd library. sd_journal_sendv is available since the early days (systemd v38), so a version check is probably superflous. We add the following fields to each record: - MESSAGE: The log message - PRIORITY (aka severity): Numeric severity as in RFC5424 section 6.2.1 - SYSLOG_FACILITY: Numeric facility as in RFC5424 section 6.2.1 - SYSLOG_IDENTIFIER: If provided, use value from configuration. Else use systemd's default behaior, which is to determine the field by using libc's program_invocation_short_name, resulting in "icinga2". - ICINGA2_FACILITY: Facility as in Log::Log(..., String facility, ...), e.g. "ApiListener" - some more fields are added automatically by systemd Fields are stored indexed, so we can do fast queries for certain field values. Example: $ journalctl -t icinga2 ICINGA2_FACILITY=ApiListener -n 5 Syslog compatiblity is ratained because good old tag, severity and facility is stored along, and systemd can forward to syslog daemons. See also https://systemd.io/JOURNAL_NATIVE_PROTOCOL/.
45 lines
1.0 KiB
C++
45 lines
1.0 KiB
C++
/* Icinga 2 | (c) 2021 Icinga GmbH | GPLv2+ */
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#ifndef JOURNALDLOGGER_H
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#define JOURNALDLOGGER_H
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#include "base/i2-base.hpp"
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#if !defined(_WIN32) && defined(HAVE_SYSTEMD)
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#include "base/journaldlogger-ti.hpp"
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#include <sys/uio.h>
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namespace icinga
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{
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/**
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* A logger that logs to systemd journald.
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*
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* @ingroup base
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*/
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class JournaldLogger final : public ObjectImpl<JournaldLogger>
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{
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public:
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DECLARE_OBJECT(JournaldLogger);
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DECLARE_OBJECTNAME(JournaldLogger);
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static void StaticInitialize();
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static void StatsFunc(const Dictionary::Ptr& status, const Array::Ptr& perfdata);
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void OnConfigLoaded() override;
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void ValidateFacility(const Lazy<String>& lvalue, const ValidationUtils& utils) override;
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protected:
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void SystemdJournalSend(const std::vector<String>& varJournalFields) const;
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static struct iovec IovecFromString(const String& s);
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std::vector<String> m_ConfiguredJournalFields;
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void ProcessLogEntry(const LogEntry& entry) override;
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void Flush() override;
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};
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}
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#endif /* !_WIN32 && HAVE_SYSTEMD */
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#endif /* JOURNALDLOGGER_H */
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