Without this commit, children and parents of a checkable were rescheduled on a
state change while holding the lock for the current checkable. If both ends of
a dependency are checked at the same time and both change state, they could end
up in a deadlock waiting for each other.
This commit fixes this problem by changing the code so that other checkables
are rescheduled only after releasing the lock for the current checkable.
When there are multiple active IDO instances on the same node, before this
commit, all of them would share a single DbValue object for the notification_id
column of the icinga_contactnotifications table. This resulted in the issue
that one database references the notification_id in another database.
This commit fixes this by using a separate DbValue value for each IDO instance.
This needs a new signal as the existing OnQuery and OnMultipleQueries signals
perform the same queries on all IDO instances, but different queries are needed
here per instance (they only differ in the referenced DbValue). Therefore, a
new signal OnMakeQueries is added that takes a std::function which is called
once per IDO instance and can access callbacks to perform one or multiple
queries only on this specific IDO instance.
to ensure Checkable#IsReachable() returns correctly for dependency children inside OnReachabilityChanged().
That needs the dependency parent to be already in the correct state.
refs #9143
StateChangeHandler() is the function used when the actual hard/soft state
changes and thus also writes state history. This is not desired in this case,
instead, a runtime update should be generated, therefore call UpdateState()
instead.
refs #9063
StateChangeHandler() is the function used when the actual hard/soft state
changes and thus also writes state history. This is not desired in this case,
instead, a runtime update should be generated, therefore call UpdateState()
instead.
refs #9063
StateChangeHandler() is the function used when the actual hard/soft state
changes and thus also writes state history. This is not desired in this case,
instead, a runtime update should be generated, therefore call UpdateState()
instead.
refs #9063
Previously, both funktions did related operations but had unclear and confusing
naming:
- UpdateState updated the icinga:{host,service}:state Redis keys.
- SendStatusUpdate sent a runtime update for the icinga:{host,service}:state.
This commit merges both functions into one with a new mode parameter. The
following modes are now supported:
- Volatile: Update the icinga:{host,service}:state Redis key.
- Full: Perform the volatile state update and in addition send a corresponding
runtime update so that this state update gets written through to the
persistent database by a running icingadb process.
- RuntimeOnly: Special mode for callers that can ensure that a volatile update
for the current state was already performed but has to be upgraded to a full
update.
refs #9063
When a comment or downtime is removed manually, the name of the requestor and
timestamp have to be synced to other nodes in the cluster to allow all of them
to generate a consistent Icinga DB history stream.
refs #9101
i.e. the confusion of the state file deserializator with e.g. `"type":32` on startup.
That would unexpectedly restore (the now ignored) null (not `{"type":32}`) as there's no type "32".
refs #8186
The config parser requires *Command#arguments#order to be a Number, i.e. 42,
4.2 or even "4.2". That's int-casted where needed, now also for Icinga DB.
Before:
```
object CheckCommand "9117" {
command = [ "true" ]
arguments = {
"4.2" = { order = "4.2" }
}
}
```
2022-01-03T13:25:07.166+0100 FATAL icingadb json: cannot unmarshal string into Go value of type int64
m_DataBuffer may be modified concurrently while StatsFunc() is called, thus
it's unsafe to call size() on it. As write access to m_DataBuffer is already
synchronized by only modifying it from the single work queue thread, instead of
adding a mutex, this commit adds a new std::atomic_size_t which is additionally
updated when modifying m_DataBuffer and can safely be accessed in StatsFunc().
There is no explicit synchronization of access to m_DataBuffer which is fine if
it is only accessed from the single-threaded work queue. However, Stop() also
called Flush() in another thread, leading to concurrent write access to
m_DataBuffer which can result in a crash due to use after free/double free.
Changes in this commit:
* Flush() is renamed to FlushWQ() to show that it should only be called from
the work queue. Additionally, it now asserts that it is running on the work
queue.
* Visibility of some data members is changed from protected to private. No
other classes have to access these at the moment. By this change, accidental
concurrent access from derived classes in the future is prevented.
* Stop() now flushes by posting FlushWQ() to the work queue and joining it.
In the 2.12.6 release, the full schema file sets the version to 1.14.3, whereas
the latest available upgrade file 2.11.0.sql sets it to 1.15.0. Therefore, ship
a new upgrade file 2.12.7.sql for all users who imported their schema with
version 2.11.0 or later and never performed an upgrade since then. Their
databases incorrectly state schema version 1.14.3 and is bumped to the correct
version 1.15.0 by the upgrade.
In the 2.13.2 release, the full schema file sets the version to 1.15.0, whereas
the latest available upgrade file 2.13.0.sql sets it to 1.15.1. Therefore,
rename the incorrectly named upgrade file 2.13.1.sql (it was not shipped in
this or any other release so far) to 2.13.3.sql for users who imported their
schema with version 2.13.0 or later and never performed an upgrade since then.
Their databases incorrectly state schema version 1.15.0 and are bumped to the
correct version 1.15.1 by the upgrade.
The full schema is not touched by this commit as for the current branch, this
was already fixed by 815533b334.
When creating a fixed downtime that starts immediately while the checkable is
in a non-OK state, previously the code path for flexible downtimes was used to
trigger this downtime. This is fixed by this commit which resolves two issued:
1. Missing downtime start notification: notifications work differently for
fixed and flexible downtimes. This resulted in missing downtime start
notifications under the conditions described above.
2. Incorrect downtime trigger time: this code path would incorrectly assume the
timestamp of the last checkable as the trigger time which is incorrect for
fixed downtimes.
not to confuse the state file deserializator with e.g. `"type":32` on startup.
That would unexpectedly restore null (not `{"type":32}`) as there's no type "32".
refs #8186
When triggering a downtime, the time of the causing event is now passed on as
the trigger time. That time is:
* For fixed downtimes: the later one of start and entry time.
* If a check result triggers the downtime: The execution end of the check
result.
* If another downtime triggers the downtime: The trigger time of the first
downtime.
This is done so two nodes in a HA setup can write consistent Icinga DB downtime
history streams.
refs #9101
`ConfigType::GetObjectsByType<Downtime>()` already returns a
`std::vector<Downtime::Ptr>` so there is no point in copying it into another
vector of the same type just to then iterate the copied vector instead of the
original one.
This commit fixes the following build error:
[ 55%] Building CXX object lib/icinga/CMakeFiles/icinga.dir/usergroup.cpp.o
lib/icinga/usergroup.cpp:79:24: error: incomplete type ‘icinga::Notification’ used in nested name specifier
79 | std::set<Notification::Ptr> UserGroup::GetNotifications() const
| ^~~
This change fixes two problems:
* The internal functions used by ScriptFunc more or less expect to operate on
full days, but ScriptFunc may have called them with some random timestamp
during the day. This is fixed by always using midnight of the day as
reference time.
* Previously, the code advanced a timestamp to the next day by adding 24 hours.
On days with DST changes, this could either still be on the same day (a day
may have 25 hours) or skip an entire day (a day may have 23 hours). This is
fixed by using a struct tm to advance the time to the next day.
Having the command type be a part of the command ID isn't needed anywhere. Removing this simplifies the way we generate IDs in general, because we don't need Prepend() anymore.
The command type was only needed to prevent ID collisions within the command_envvar and command_argument tables. Those tables have since been separated into {check,event,notification}command_envvar and {check,event,notification}command_argument tables.
PR #9036 introduces some incompatible changes to the Redis schema, most
importantly where Icinga DB has to read the environment from: now it has to use
a new top-level key of the icinga:stats message instead of a value in the
IcingaApplication part of that message.
In order to avoid changes to the environment ID, it is now no longer derived
from the Environment constant but instead from the public key of the CA
certificate. This ensures that it is different between clusters by default, so
no additional changes have to be done to allow two clusters to use Icinga DB to
write into the same database.
To prevent the ID from changing when the CA certificate is replaced, it is also
persisted into the file /var/lib/icinga2/icingadb.env, so if that file exists,
it takes precedence over the CA certificate.
... i.e. UUID -> SHA1(env, eventType, x...) given that SHA1(env, x...) = type-specific ID.
Rationale: allow both masters to write the same history concurrently (while not
in split-brain), so that REPLACE INTO deduplicates the same events written twice.
* ack: SHA1(env, "ack_set"|"ack_clear", checkable.name, setTime)
* comment: SHA1(env, "comment_add"|"comment_remove", comment.name)
* downtime: SHA1(env, "downtime_start"|"downtime_end", downtime.name)
* flapping: SHA1(env, "flapping_start"|"flapping_end", checkable.name, startTime)
* notification: SHA1(env, "notification", notification.name, notificationType, sendTime)
* state: SHA1(env, "state_change", checkable.name, changeTime)
... i.e. UUID -> SHA1(x..., send time) given that SHA1(x...) = notification id.
Rationale: allow both masters to write the same notification history concurrently (while
not in split-brain), so that REPLACE INTO deduplicates the same events written twice.
... i.e. UUID -> SHA1(x..., check time) given that SHA1(x...) = checkable id.
Rationale: allow both masters to write the same state history concurrently (while
not in split-brain), so that REPLACE INTO deduplicates the same events written twice.
add_definitions would set SD_JOURNAL_SUPPRESS_LOCATION for all targets
in directory and sub-directories. However, another future target might
want the opposite, so define it as local as possible to journaldlogger.cpp.
To make this work, we must take journaldlogger.cpp out of the unity
build, because all files from a unity of share compiler definitions.
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/.
The upcoming JournaldLogger will need the same syslog validation and
conversion logic, so factor it out from SyslogLogger to make it
reusable.
Also explicitely include syslog.h, which defines the syslog()
function.
The loop iterated over the services of the wrong host resulting in duplicate
downtimes scheduled for services of the parent host instead of downtimes for
services of the child host.
IdoPgsqlConnection::Escape() internally uses PQescapeStringConn() and its
documentation states the following:
Furthermore, PQescapeStringConn does not generate the single quotes that must
surround PostgreSQL string literals; they should be provided in the SQL
command that the result is inserted into.
So it's intended to use the result in 'string' literals, not in E'string'
literals as Icinga did. This results in problems as the behavior of
PQescapeStringConn() depends on how the current connection will interpret
regular single quoted literals, namely on the value of the
standard_conforming_strings variable.
The E'string' literals were initially introduced in
ac6f3f8acf to fix#1206 where PostgreSQL started
warning about escape sequences in string literals not supported by the SQL
standard (but by PostgreSQL depending on the value of
standard_conforming_strings). In the meantime the oldest PostgreSQL version on
any platform supported by Icinga increased to 9.2 (CentOS 7) and starting with
9.1, standard_conforming_strings is enabled by default, so there will be no
warnings about escape sequences (as the warning is only issued if the escape
sequence is actually interpreted by PostgreSQL).
Icinga started the initial config sync right after the first Redis connection
was established. If any other connections would take longer to connect than
when it's first needed, queries were discarded.
The loop in the connected callback of the parent connection uses m_Rcons which
previously was only initialized after that connection was already started.
This allows the callback to call RedisConnection::SetConnectedCallback() to set
another callback for this connection. This sets m_ConnectedCallback and thereby
destroys the std::function while it's running resulting in undefined behavior.
By operating on a copy, m_ConnectedCallback can be set without affecting the
currently running callback.
As Icinga first sends a SIGTERM to a check plugin on timeout to allow it to
terminate gracefully, this is not really part of the plugin API specification
and we cannot assume that plugins will handle this correctly and still exit
with an exit code that maps to UNKNOWN. Therefore, once Icinga decides to kill
a process, force its exit code to 128 to be sure the state will be UNKNOWN
after a timeout.
I.e. do the following in parallel (highest priority first):
* Stream state changes to icinga:runtime:state
* Sync config and initial state,
then let queued runtime updates to the just synced state pass
Many functions of LegacyTimePeriod take a tm pointer as an input parameter and
then pass it to mktime() which actually modifies it. This causes problems if
tm_isdst was intentionally set to -1 (to automatically detect whether DST is
active at some time) and then a function is called that implicitly sets
tm_isdst and then the values of tm are modified in a way that crosses a DST
change. This resulted in 1 hour offsets with ScheduledDowntimes on days with
DST changes.
* Implement scheduling_source attribute
This implements the attribute `scheduling_source` for hosts and services to show which endpoint is running the scheduler for the check.
refs #4814
IdoMysqlConnection, IdoPgsqlConnection, IcingaDB, and ElasticsearchWriter
require passwords in their configuration to authenticate against external
services. This commit ensures that these can no longer be accessed using the
API.
Only handle messages with a trusted origin in
ClusterEvents::ExecuteCommandAPIHandler. Previously, it would not locally
execute any command but forward them to other nodes where they would then have
a trusted origin and be executed.
Yonas Habteab
Julian Brost
Alexander A. Klimov
Noah Hilverling
Eric Lippmann
Yonas Habteab
Tobias Deiminger
Noah Hilverling
Michael Insel
Julian Brost