mirror of
https://github.com/Icinga/icinga2.git
synced 2025-11-04 05:34:12 +01:00
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/.
88 lines
2.6 KiB
C++
88 lines
2.6 KiB
C++
/* Icinga 2 | (c) 2021 Icinga GmbH | GPLv2+ */
|
|
|
|
#include "base/i2-base.hpp"
|
|
#if !defined(_WIN32) && defined(HAVE_SYSTEMD)
|
|
#include "base/journaldlogger.hpp"
|
|
#include "base/journaldlogger-ti.cpp"
|
|
#include "base/configtype.hpp"
|
|
#include "base/statsfunction.hpp"
|
|
#include "base/sysloglogger.hpp"
|
|
#include <systemd/sd-journal.h>
|
|
|
|
using namespace icinga;
|
|
|
|
REGISTER_TYPE(JournaldLogger);
|
|
|
|
REGISTER_STATSFUNCTION(JournaldLogger, &JournaldLogger::StatsFunc);
|
|
|
|
void JournaldLogger::StatsFunc(const Dictionary::Ptr& status, const Array::Ptr&)
|
|
{
|
|
DictionaryData nodes;
|
|
|
|
for (const JournaldLogger::Ptr& journaldlogger : ConfigType::GetObjectsByType<JournaldLogger>()) {
|
|
nodes.emplace_back(journaldlogger->GetName(), 1); //add more stats
|
|
}
|
|
|
|
status->Set("journaldlogger", new Dictionary(std::move(nodes)));
|
|
}
|
|
|
|
void JournaldLogger::OnConfigLoaded()
|
|
{
|
|
ObjectImpl<JournaldLogger>::OnConfigLoaded();
|
|
m_ConfiguredJournalFields.clear();
|
|
m_ConfiguredJournalFields.push_back(
|
|
String("SYSLOG_FACILITY=") + Value(SyslogHelper::FacilityToNumber(GetFacility())));
|
|
const String identifier = GetIdentifier();
|
|
if (!identifier.IsEmpty()) {
|
|
m_ConfiguredJournalFields.push_back(String("SYSLOG_IDENTIFIER=" + identifier));
|
|
}
|
|
}
|
|
|
|
void JournaldLogger::ValidateFacility(const Lazy<String>& lvalue, const ValidationUtils& utils)
|
|
{
|
|
ObjectImpl<JournaldLogger>::ValidateFacility(lvalue, utils);
|
|
if (!SyslogHelper::ValidateFacility(lvalue()))
|
|
BOOST_THROW_EXCEPTION(ValidationError(this, { "facility" }, "Invalid facility specified."));
|
|
}
|
|
|
|
/**
|
|
* Processes a log entry and outputs it to journald.
|
|
*
|
|
* @param entry The log entry.
|
|
*/
|
|
void JournaldLogger::ProcessLogEntry(const LogEntry& entry)
|
|
{
|
|
const std::vector<String> sdFields {
|
|
String("MESSAGE=") + entry.Message.GetData(),
|
|
String("PRIORITY=") + Value(SyslogHelper::SeverityToNumber(entry.Severity)),
|
|
String("ICINGA2_FACILITY=") + entry.Facility,
|
|
};
|
|
SystemdJournalSend(sdFields);
|
|
}
|
|
|
|
void JournaldLogger::Flush()
|
|
{
|
|
/* Nothing to do here. */
|
|
}
|
|
|
|
void JournaldLogger::SystemdJournalSend(const std::vector<String>& varJournalFields) const
|
|
{
|
|
struct iovec iovec[m_ConfiguredJournalFields.size() + varJournalFields.size()];
|
|
int iovecCount = 0;
|
|
|
|
for (const String& journalField: m_ConfiguredJournalFields) {
|
|
iovec[iovecCount] = IovecFromString(journalField);
|
|
iovecCount++;
|
|
}
|
|
for (const String& journalField: varJournalFields) {
|
|
iovec[iovecCount] = IovecFromString(journalField);
|
|
iovecCount++;
|
|
}
|
|
sd_journal_sendv(iovec, iovecCount);
|
|
}
|
|
|
|
struct iovec JournaldLogger::IovecFromString(const String& s) {
|
|
return { const_cast<char *>(s.CStr()), s.GetLength() };
|
|
}
|
|
#endif /* !_WIN32 && HAVE_SYSTEMD */
|