instead of computing from scratch if they're in the _api package.
For now this changes literally nothing as paths of existing objects still follow
the scheme of paths of new objects which didn't change. Now Icinga only doesn't expect
existing objects at particular paths. However, with the latter in v2.14+ (agent,
satellite) we can just change the path scheme of new objects in v2.16+ (master)
as we wish. The child nodes will just follow the new scheme of paths of new objects.
This prevents the `m_HasMatches` property from being altered simultaneously.
This might seem harmless (since this property can only be set to true by any calling thread),
however, from a technical (C++) point of view, this constitutes a data race.
1. The lookup of apply rules per source type now implies
no String(const char*) (no malloc()) and just pointer (uint64) comparisions
2. Apply rules are now also grouped by target type via a nested map, that obsoletes
checking the target type while iterating over all rules per source type
When committing an item with `ignore_on_error` flag set fails, the `Commit()` method only returns `nullptr`
and the current item is not being dropped from `m_Items`. `CommittNewItems()` also doesn't check the return
value of `Commit()` but just continues and tries to commit all items from `m_Items` in recursive call. Since
this corrupt item is never removed from `m_Items`, it ends up in an endless recursion till it finally crashes.
by caching the total minimum log severity of all loggers in a
"global variable" and whether a message's severity is large enough for any of
the loggers in a per-message no-op flag.
1. Don't set a custom handler for SIGCHLD (in the umbrella process)
as that handler doesn't actually handle SIGCHLD anymore
2. Don't reset the SIGCHLD handler (in the worker process)
as there's nothing to reset anymore due to the above change
3. Don't block SIGCHLD across fork(2) as its handler doesn't change anymore
due to the above changes
Before:
On SIGCHLD from the forked worker the umbrella process sets a failure flag.
StartUnixWorker() recognises that and does waitpid(), failure message, etc..
On OpenBSD we can't tell the signal source, so we always set the failure flag.
That's not how our IPC shall work, that breaks the IPC sooner or later.
After:
No SIGCHLD handling and no failure flag setting.
Instead StartUnixWorker()'s wait loop uses waitpid(x,y,WNOHANG)
to avoid false positives while watching the forked worker.
This ensures that `frame.Depth` is only decreased when preceding `frame.IncreaseStackDepth()` callee was successful.
This way, `frame.Depth` will have the same depth prior to and after evaluating a frame.
Before (time: vertical, stack: horizontal):
* Checkable::ExecuteCheck
* Checkable::UpdateNextCheck
* IcingaDB::NextCheckChangedHandler
* HSET icinga:host:state
* HSET icinga:checksum:host:state
* ZADD icinga:nextupdate:host
* RandomCheckTask::ScriptFunc
* Checkable::ProcessCheckResult
* Checkable::UpdateNextCheck
* IcingaDB::NextCheckChangedHandler
* HSET icinga:host:state
* HSET icinga:checksum:host:state
* ZADD icinga:nextupdate:host
* IcingaDB::NewCheckResultHandler
* HSET icinga:host:state
* HSET icinga:checksum:host:state
* ZADD icinga:nextupdate:host
* IcingaDB::StateChangeHandler
* XADD icinga:runtime:state
* IcingaDB::ForwardHistoryEntries
* XADD icinga:history:stream:state
After:
* Checkable::ExecuteCheck
* Checkable::UpdateNextCheck
* RandomCheckTask::ScriptFunc
* Checkable::ProcessCheckResult
* Checkable::UpdateNextCheck
* IcingaDB::NewCheckResultHandler
* HSET icinga:host:state
* HSET icinga:checksum:host:state
* ZADD icinga:nextupdate:host
* IcingaDB::StateChangeHandler
* XADD icinga:runtime:state
* IcingaDB::ForwardHistoryEntries
* XADD icinga:history:stream:state
The first state + nextupdate (for overdue) update comes from next_check being
set to now + interval immediately before doing the actual check (not to trigger
it twice). This update is not only not important for the end user, but even
inappropriate. The end user SHALL see next_check being e.g. in -4s, not 5m, as
the check is running at the moment.
The second one is just redundant as IcingaDB::NewCheckResultHandler (the third
one) is called anyway and will update state + nextupdate as well.
The point of logging to the Windows Event Log was to catch errors that happen
before the full logging configuration has been loaded and enabled. Messages
like the number of loaded objects per type just cause noise in the log and
provide little benefit. Therefore raise the required log level at this stage.
Note that this commit removes the (never documented) ability to use the -x flag
to change the level. But doing so would require patching the command line of
the service in the registry anyways.
If some kind of query is not supposed to be processed at the moment, there is
little point in checking it. During a full dump, state updates are suppressed
(i.e. delayed), so when a dump takes very long, this would have resulted in a
false Redis backlog warning.
The check makes no attempt to explicitly connect to Redis, it uses the
connection of the IcingaDB feature, so this message better describes the state
in this situation.
IcingaDB::GetConnection() uses IcingaDB::m_Rcon which is only initialized in
IcingaDB::Start(), therefore add a nullptr check to the check command.
Additionally, as m_Rcon is potentially accessed concurrently, add a copy of the
value that is safe for concurrent use.
icingadb-web shows multiple lines from the check output collapsed into a single
line. The lines containing just minuses make this look cluttered and making
making it a heading provides little to no benefit. Even when rendering markdown
in the check output at some point, having the lists labeled using normal
paragraphs would look just fine.
- Add icinga2_ and icingadb_ prefixes to make clear which component is
responsible for the value.
- Rename heartbeat_lag to heartbeat_age, describes it better in my opinion and
sound a bit less like something that should be as close to zero as possible.
- Rename redis_dump/database_sync into full_dump/full_sync as this is how these
operations are refered to in log messages as well.
- Rename Redis backlog into Redis query backlog, makes it a bit clearer in my
opinion.
- Rename runtime_backlog into runtime_update_backlog, as the component in
Icinga DB is called that way and this naming is also exposed in log messages.
- Rename dump_config/state/history into config/state/history_dump, makes it
sound more natural.
They add no additional information compared to the *_1min values as it's always
the same value divided by 60 anyways. Adding the actual value from the last
second makes little sense for realistic values of check_interval.
Use the already existing format to pass performance data to Icinga 2 rather
than some new JSON structure. Has the additional benefit of doing more things
in Go than in C++.
IcingaDB may receive callbacks from Boost signals before being fully started.
This resulted in situations where m_EnvironmentId was used before it was
initialized properly. This is fixed by initializing it earlier (during the
config validation stage). However, at this stage, it should not yet write to
disk, therefore, persisting the environment ID to disk is delayed until later
in the startup process.
Initializing at this stage has an extra benefit: if there is an error for some
reason (possibly corrupt icingadb.env file), this now shows up as a nice error
during config validation.
Additionally, this replaces the use of std::call_once with std::mutex due to
bug in libstdc++ (see inline comment for reference).
Alexander A. Klimov
Yonas Habteab
Julian Brost