axosyslog-4.10.1

4.10.1

These are news entries of AxoSyslog 4.10.0.
4.10.1 fixed two crashes related to FilterX strings and JSON objects.

AxoSyslog is binary-compatible with syslog-ng [1] and serves as a drop-in replacement.

Explore and learn more about the new features in our release announcement blog post.

We provide cloud-ready container images and Helm charts.

Packages are available in our APT and RPM
repositories (Ubuntu, Debian, AlmaLinux, Fedora).

Check out the AxoSyslog documentation for all the details.

Highlights

Google Pub/Sub gRPC destination

Sending logs to Google Pub/Sub via the gRPC interface.

Example config:

google-pubsub-grpc(
  project("my_project")
  topic($topic)

  data($MESSAGE)
  attributes(
    timestamp => $S_ISODATE,
    host => $HOST,
  )

  workers(4)
  batch-timeout(1000) # ms
  batch-lines(1000)
);

The project() and topic() options are templatable.
The default service endpoint can be changed with the service_endpoint() option.

(#373)

Azure Monitor destination

Sending logs to Azure Monitor using OAuth 2 authentication.

Example config:

azure-monitor-custom(
  table-name("table")
  dcr-id("dcr id")
  dce-uri("https://dce-uri.ingest.monitor.azure.com")

  auth(tenant-id("tenant id") app-id("app id") app-secret("app secret"))

  workers(4)
  batch_timeout(1000) # ms
  batch_lines(5000)
  batch_bytes(4096KiB)
);

Note: Table name should not contain the trailing "_CL" string for custom tables.

(#457)

Features

• syslog() source driver: add support for RFC6587 style auto-detection of
  octet-count based framing to avoid confusion that stems from the sender
  using a different protocol to the server. This behaviour can be enabled
  by using transport(auto) option for the syslog() source.
  (#4814)

• syslog(transport(proxied-*)) and network(transport(proxied-*)): changed
  where HAProxy transport saved the original source and destination addresses.
  Instead of using dedicated PROXIED_* name-value pairs, use the usual
  $SOURCEIP, $SOURCEPORT, $DESTIP and $DESTPORT macros, making haproxy
  based connections just like native ones.

  $SOURCEPORT: added new macro which expands to the source port of the peer.
  (#361)

• check-program: Introduced as a flag for global or source options.

  By default, this flag is set to false. Enabling the check-program flag triggers program name validation for RFC3164 messages. Valid program names must adhere to the following criteria:

  Contain only these characters: [a-zA-Z0-9-_/().]
  Include at least one alphabetical character.
  If a program name fails validation, it will be considered part of the log message.

  Example:

  source { network(flags(check-hostname, check-program)); };
  

  (#380)

• s3 destination: Added content-type() option.
  (#408)

• bigquery(), google-pubsub-grpc(): Added service-account() authentication option

  Example usage:

  destination {
      google-pubsub-grpc(
          project("test")
          topic("test")
          auth(service-account(key ("path_to_service_account_key.json")))
      );
  };
  

  Note: In contrary to the http() destination's similar option,
  we do not need to manually set the audience here as it is
  automatically recognized by the underlying gRPC API.
  (#412)

• metrics: add syslogng_stats_level metric to monitor the current metric verbosity level
  (#493)

• webhook(),opentelemetry() sources: support input_event_bytes metrics
  (#494)

Bugfixes

• network(), syslog() sources and destinations: fix TCP/TLS shutdown
  (#420)

• network(), syslog(): Fixed a potential crash for TLS destinations during reload

  In case of a TLS connection, if the handshake didn't happen before reloading AxoSyslog,
  it crashed on the first message sent to that destination.
  (#418)

• axosyslog-otlp() destination: Fixed a crash.
  (#384)

• http: Fixed a batching related bug that happened with templated URLs and a single worker.
  (#464)

Other changes

• Crash report (backtrace) on x86-64 and ARM-based Linux systems
  (#350)

• FilterX and log path information for perf stackdumps
  (#433)

FilterX features

• FilterX performance improvements
  (#253, #257, #258, #330, #365, #385, #390, #395, #396, #397, #400, #421, #426, #428, #429, #430, #432, #436, #437, #446, #448, #452, #453, #467, #468, #469, #470, #471, #472, #473, #474, #476, #491)

• strftime(): Added new filterx function to format datetimes.

  Example usage:

  $MSG = strftime("%Y-%m-%dT%H:%M:%S %z", datetime);
  

  Note: %Z currently does not respect the datetime's timezone,
  usage of %z works as expected, and advised.
  (#402)

• keys(): Add keys Function to Retrieve Top-Level Dictionary Keys

  This feature introduces the keys function, which returns the top-level keys of a dictionary. It provides a simple way to inspect or iterate over the immediate keys without manually traversing the structure.

  • Returns an Array of Keys: Provides a list of dictionary keys as an array.
  • Current Level Only: Includes only the top-level keys, ignoring nested structures.
  • Direct Index Access: The resulting array supports immediate indexing for quick key retrieval.

  Example:

      dict = {"foo":{"bar":{"baz":"foobarbaz"}},"tik":{"tak":{"toe":"tiktaktoe"}}};
      # empty dictionary returns []
      empty = keys(json());
  
      # accessing the top level results ["foo", "tik"]
      a = keys(dict);
  
      # acccessing nested levels directly results ["bar"]
      b = keys(dict["foo"]);
  
      # directly index the result of keys() to access specific keys is possible (returns ["foo"])
      c = keys(dict)[0];

  (#435)

• Added support for switch cases.

  This syntax helps to organize the code for multiple
  if, elif, else blocks and also improves
  the branch finding performance.

  Cases with literal string targets are stored in a map,
  and the lookup is started with them.

  Other case targets can contain any expressions,
  and they are evaluated in order.

  Please note that although literal string and default
  target duplications are checked and will cause init failure,
  non-literal expression targets are not checked, and only
  the first maching case will be executed.

  Example config:

  switch ($MESSAGE) {
    case "foobar":
      $MESSAGE = "literal-case";
      break;
    case any_expression:
      $MESSAGE = "variable-case";
      break;
    default:
      $MESSAGE = "default";
      break;
  };
  

  (#473)

• vars(): add exclude_msg_values parameter
  (#505)

• vars(): $ is now prepended for the names of message variables.
  (...

axosyslog-charts-0.13.0

AxoSyslog for Kubernetes

axosyslog-4.10.0

4.10.0

AxoSyslog is binary-compatible with syslog-ng [1] and serves as a drop-in replacement.

Explore and learn more about the new features in our release announcement blog post.

We provide cloud-ready container images and Helm charts.

Packages are available in our APT and RPM
repositories (Ubuntu, Debian, AlmaLinux, Fedora).

Check out the AxoSyslog documentation for all the details.

Highlights

Google Pub/Sub gRPC destination

Sending logs to Google Pub/Sub via the gRPC interface.

Example config:

google-pubsub-grpc(
  project("my_project")
  topic($topic)

  data($MESSAGE)
  attributes(
    timestamp => $S_ISODATE,
    host => $HOST,
  )

  workers(4)
  batch-timeout(1000) # ms
  batch-lines(1000)
);

The project() and topic() options are templatable.
The default service endpoint can be changed with the service_endpoint() option.

(#373)

Azure Monitor destination

Sending logs to Azure Monitor using OAuth 2 authentication.

Example config:

azure-monitor-custom(
  table-name("table")
  dcr-id("dcr id")
  dce-uri("https://dce-uri.ingest.monitor.azure.com")

  auth(tenant-id("tenant id") app-id("app id") app-secret("app secret"))

  workers(4)
  batch_timeout(1000) # ms
  batch_lines(5000)
  batch_bytes(4096KiB)
);

Note: Table name should not contain the trailing "_CL" string for custom tables.

(#457)

Features

• syslog() source driver: add support for RFC6587 style auto-detection of
  octet-count based framing to avoid confusion that stems from the sender
  using a different protocol to the server. This behaviour can be enabled
  by using transport(auto) option for the syslog() source.
  (#4814)

• syslog(transport(proxied-*)) and network(transport(proxied-*)): changed
  where HAProxy transport saved the original source and destination addresses.
  Instead of using dedicated PROXIED_* name-value pairs, use the usual
  $SOURCEIP, $SOURCEPORT, $DESTIP and $DESTPORT macros, making haproxy
  based connections just like native ones.

  $SOURCEPORT: added new macro which expands to the source port of the peer.
  (#361)

• check-program: Introduced as a flag for global or source options.

  By default, this flag is set to false. Enabling the check-program flag triggers program name validation for RFC3164 messages. Valid program names must adhere to the following criteria:

  Contain only these characters: [a-zA-Z0-9-_/().]
  Include at least one alphabetical character.
  If a program name fails validation, it will be considered part of the log message.

  Example:

  source { network(flags(check-hostname, check-program)); };
  

  (#380)

• s3 destination: Added content-type() option.
  (#408)

• bigquery(), google-pubsub-grpc(): Added service-account() authentication option

  Example usage:

  destination {
      google-pubsub-grpc(
          project("test")
          topic("test")
          auth(service-account(key ("path_to_service_account_key.json")))
      );
  };
  

  Note: In contrary to the http() destination's similar option,
  we do not need to manually set the audience here as it is
  automatically recognized by the underlying gRPC API.
  (#412)

• metrics: add syslogng_stats_level metric to monitor the current metric verbosity level
  (#493)

• webhook(),opentelemetry() sources: support input_event_bytes metrics
  (#494)

Bugfixes

• network(), syslog() sources and destinations: fix TCP/TLS shutdown
  (#420)

• network(), syslog(): Fixed a potential crash for TLS destinations during reload

  In case of a TLS connection, if the handshake didn't happen before reloading AxoSyslog,
  it crashed on the first message sent to that destination.
  (#418)

• axosyslog-otlp() destination: Fixed a crash.
  (#384)

• http: Fixed a batching related bug that happened with templated URLs and a single worker.
  (#464)

Other changes

• Crash report (backtrace) on x86-64 and ARM-based Linux systems
  (#350)

• FilterX and log path information for perf stackdumps
  (#433)

FilterX features

• FilterX performance improvements
  (#253, #257, #258, #330, #365, #385, #390, #395, #396, #397, #400, #421, #426, #428, #429, #430, #432, #436, #437, #446, #448, #452, #453, #467, #468, #469, #470, #471, #472, #473, #474, #476, #491)

• strftime(): Added new filterx function to format datetimes.

  Example usage:

  $MSG = strftime("%Y-%m-%dT%H:%M:%S %z", datetime);
  

  Note: %Z currently does not respect the datetime's timezone,
  usage of %z works as expected, and advised.
  (#402)

• keys(): Add keys Function to Retrieve Top-Level Dictionary Keys

  This feature introduces the keys function, which returns the top-level keys of a dictionary. It provides a simple way to inspect or iterate over the immediate keys without manually traversing the structure.

  • Returns an Array of Keys: Provides a list of dictionary keys as an array.
  • Current Level Only: Includes only the top-level keys, ignoring nested structures.
  • Direct Index Access: The resulting array supports immediate indexing for quick key retrieval.

  Example:

      dict = {"foo":{"bar":{"baz":"foobarbaz"}},"tik":{"tak":{"toe":"tiktaktoe"}}};
      # empty dictionary returns []
      empty = keys(json());
  
      # accessing the top level results ["foo", "tik"]
      a = keys(dict);
  
      # acccessing nested levels directly results ["bar"]
      b = keys(dict["foo"]);
  
      # directly index the result of keys() to access specific keys is possible (returns ["foo"])
      c = keys(dict)[0];

  (#435)

• Added support for switch cases.

  This syntax helps to organize the code for multiple
  if, elif, else blocks and also improves
  the branch finding performance.

  Cases with literal string targets are stored in a map,
  and the lookup is started with them.

  Other case targets can contain any expressions,
  and they are evaluated in order.

  Please note that although literal string and default
  target duplications are checked and will cause init failure,
  non-literal expression targets are not checked, and only
  the first maching case will be executed.

  Example config:

  switch ($MESSAGE) {
    case "foobar":
      $MESSAGE = "literal-case";
      break;
    case any_expression:
      $MESSAGE = "variable-case";
      break;
    default:
      $MESSAGE = "default";
      break;
  };
  

  (#473)

• vars(): add exclude_msg_values parameter
  (#505)

• vars(): $ is now prepended for the names of message variables.
  (#393)

• regex_search(): Function Reworked

  The `regex_sear...

axosyslog-charts-0.12.0

AxoSyslog for Kubernetes

axosyslog-4.9.0

4.9.0

AxoSyslog is binary-compatible with syslog-ng [1] and serves as a drop-in replacement.

Explore and learn more about the new features in our release announcement blog post.

We provide cloud-ready container images and Helm charts.

Packages are available for Debian and Ubuntu from our APT repository.
RPM packages are available in the Assets section (we’re working on an RPM repository as well, and hope to have it up and running for the next release).

FilterX (AxoSyslog's advanced parsing and filtering language) became a publicly available feature in AxoSyslog after the 4.8 release.
As it is currently under heavy development, FilterX related news entries can be found in separate sections.
Please note that although its syntax approaches its final form, it may break in subsequent releases.

Check out the AxoSyslog documentation for all the details.

Highlights

Sending data to ClickHouse

The new clickhouse() destination uses ClickHouse's gRPC
interface to insert logs.

Please note, that as of today, ClickHouse Cloud does not support
the gRPC interface. The clickhouse() destination is currently
only useful for self hosted ClickHouse servers.

If you would like to send logs to ClickHouse Cloud, gRPC support
can be requested from the ClickHouse Cloud team or a HTTP based
driver can be implemented in AxoSyslog.

Example config:

clickhouse(
  database("default")
  table("my_first_table")
  user("default")
  password("pw")
  schema(
    "user_id" UInt32 => $R_MSEC,
    "message" String => "$MSG",
    "timestamp" DateTime => "$R_UNIXTIME",
    "metric" Float32 => 3.14
  )
  workers(4)
  batch-lines(1000)
  batch-timeout(1000)
);

(#354)

Features

• opentelemetry(), loki() destination: Added support for templated header() values.
  (#334)

• opentelemetry(), axosyslog-otlp(): Added keep-alive() options.

  Keepalive can be configured with the time(), timeout()
  and max-pings-without-data() options of the keep-alive() block.

  opentelemetry(
      ...
      keep-alive(time(20000) timeout(10000) max-pings-without-data(0))
  );
  

  (#276)

• bigquery(): Added auth() options.

  Similarly to other gRPC based destination drivers, the bigquery()
  destination now accepts different authentication methods, like
  adc(), alts(), insecure() and tls().

  bigquery (
      ...
      auth(
          tls(
              ca-file("/path/to/ca.pem")
              key-file("/path/to/key.pem")
              cert-file("/path/to/cert.pem")
          )
      )
  );
  

  (#276)

• loki(): Added batch-bytes() and compression() options.
  (#276)

• socket based sources: Added a new option called idle-timeout().

  Setting this option makes AxoSyslog close the client connection
  if no data is received for the set amount of seconds.
  (#355)

• socket based sources: Added new flag, called exit-on-eof.

  Setting this flag to a source makes AxoSyslog stop,
  when EOF is received.
  (#351)

• syslog-ng-ctl: Added attach subcommand.

  With attach, it is possible to attach to the
  standard IO of the syslog-ng proccess.

  Example usage:

  # takes the stdio fds for 10 seconds and displays syslog-ng output in that time period
  $ syslog-ng-ctl attach stdio --seconds 10
  

  # steal trace level log messages for 10 seconds
  $ syslog-ng-ctl attach logs --seconds 10 --log-level trace
  

  (#326)

Bugfixes

• Config @version: Fixed compat-mode inconsistencies when @version
  was not specified at the top of the configuration file or was not specified at all.
  (#312)

• s3(): Eliminated indefinite memory usage increase for each reload.

  The increased memory usage is caused by the botocore library, which
  caches the session information. We only need the Session object, if
  role() is set. The increased memory usage still happens with that set,
  currently we only fixed the unset case.
  (#318)

• opentelemetry(), axosyslog-otlp() sources: Fixed source hang-up on flow-controlled paths.
  (#314)

• opentelemetry(), axosyslog-otlp() sources: Fixed a crash when workers() is set to > 1.
  (#310)

• file(), wildcard-file(): Fixed a crash and persist name collision issues.

  If multiple wildcard-file() sources or a wildcard-file() and a file() source were
  reading the same input file, it could result in log loss, log duplication, and various crashes.
  (#291)

• wildcard-file(): Fixed a crash that occurs after config reload when the source is flow-controlled.
  (#293)

• file(), stdout(): Fixed log sources getting stuck.

  Due to an acknowledgment bug in the file() and stdout() destinations,
  sources routed to those destinations may have gotten stuck as they were
  flow-controlled incorrectly.

  This issue occured only in extremely rare cases with regular files, but it
  occured frequently with /dev/stderr and other slow pseudo-devices.
  (#303)

• metrics: syslog-ng-ctl --reset will no longer reset Prometheus metrics
  (#370)

• stats: Fixed free_window counters.
  (#296)

FilterX features

• Added new filterx code flow controls.

  • drop: Drops the currently processed message and returns success.
  • done: Stops the processing and returns success.
    (#269)

• update_metric(): Added a new function similar to metrics-probe parser.

  Example usage:

  update_metric("filterx_metric", labels={"msg": $MSG, "foo": "foovalue"}, level=1, increment=$INCREMENT);
  

  (#220)

• startswith(), endswith(), includes(): Added string matching functions.

  • First argument is the string that is being matched.
  • Second argument is either a single substring or a list of substrings.
  • Optionally the ignorecase argument can be set to configure case sensitivity
    • default: false

  Example usage:

  startswith(string, prefix, ignorecase=false);
  startswith(string, [prefix_1, prefix_2], ignorecase=true);
  
  endswith(string, suffix, ignorecase=false);
  endswith(string, [suffix_1, suffix_2], ignorecase=true);
  
  includes(string, substring, ignorecase=false);
  includes(string, [substring_1, substring_2], ignorecase=true);
  

  (#297)

• parse_xml(): Added new function to parse XMLs.

  Example usage:

  my_structured_data = parse_xml(raw_xml);
  

  Converting XML to a dict is not standardized.

  Our intention is to create the most compact dict as possible,
  which means certain nodes will have different types and
  structures based on a number of different qualities of the
  input XML element.

  The following points will demonstrate the choices we made in our parser.
  In the examples we will use the JSON dict implementation.

  1. Empty XML elements become empty strings.

    XML:  <foo></foo>
    JSON: {"foo": ""}
  

  2. Attributions are stored in @attr key-value pairs,
     similarly to some other converters (e.g.: python xmltodict).

    XML:  <foo bar="123" baz="bad"/>
    JSON: {"foo": {"@bar": "123", "@baz": "bad"}}
  

  3. If an XML element has both attributes and a value,
     we need to store them in a dict, and the value needs a key.
     We store the text value under the #text key.

    XML:  <foo bar="123">baz</foo>
    JSON: {"foo": {"@bar": "123", "#text": "baz"}}
  

  4. An XML element can have both a value and inner elements.
     We use the #text key here, too.

    XML:  <foo>bar<baz>123</baz></foo>
    JSON: {"foo": {"#text": "bar", "baz": "123"}}
  

  5. An XML element can have multiple values separated by inner elements.
     In that case we concatenate the values.

    XML:  <foo>bar<a></a>baz</foo>
    JSON: {"foo": {"#text": "barbaz", "a": ""}}
  

  (#251)

• parse_windows_eventlog_xml(): Added a new function to parse Windows EventLog XMLs.

  This parser is really similar to parse_xml() with
  a couple of small differences:

  1. There is a quick schema validation.
  2. The Event->EventData field automatically handles named Data elements.
     (#282)

• parse_cef(), `parse_le...

axosyslog-charts-0.11.0

AxoSyslog for Kubernetes

axosyslog-charts-0.10.1

AxoSyslog for Kubernetes

axosyslog-4.8.1

4.8.1

This is a bugfix release of AxoSyslog.

AxoSyslog is binary-compatible with syslog-ng [1] and serves as a drop-in replacement.

Explore and learn more about the new features in our release announcement blog post.

We provide cloud-ready container images and Helm charts.

Packages are available for Debian and Ubuntu from our APT repository.
RPM packages are available in the Assets section (we’re working on an RPM repository as well, and hope to have it up and running for the next release).

Check out the AxoSyslog documentation for all the details.

Bugfixes

• Fixed crash around wildard @include configuration pragmas when compiled with musl libc

  The AxoSyslog container image, for example, was affected by this bug.

  (#261)

• metrics-probe(): fix disappearing metrics from stats prometheus output

  metrics-probe() metrics became orphaned and disappeared from the syslog-ng-ctl stats prometheus output
  whenever an ivykis worker stopped (after 10 seconds of inactivity).
  (#243)

• syslog-ng-ctl: fix escaping of stats prometheus

  Metric labels (for example, the ones produced by metrics-probe()) may contain control characters, invalid UTF-8 or \
  characters. In those specific rare cases, the escaping of the stats prometheus output was incorrect.
  (#224)

• Fixed potential null pointer deref issues

  (#216)

Other changes

• tls(): expose the key fingerprint of the peer in ${.tls.x509_fp} if
  trusted-keys() is used to retain the actual peer identity in received
  messages.
  (#136)

• network(), syslog() sources and syslog-parser(): add no-piggyback-errors flag

  With the no-piggyback-errors flag of syslog-parser(), the message will not be attributed to AxoSyslog in
  case of errors. Actually it retains everything that was present at the time of the parse error,
  potentially things that were already extracted.

  So $MSG remains that was set (potentially the raw message), $HOST may or may not be extracted,
  likewise for $PROGRAM, $PID, $MSGID, etc.

  The error is still indicated via $MSGFORMAT set to "syslog:error".

  (#245)

Discord

For a bit more interactive discussion, join our Discord server:

Credits

AxoSyslog is developed as a community project, and as such it relies
on volunteers, to do the work necessary to produce AxoSyslog.

Reporting bugs, testing changes, writing code or simply providing
feedback is an important contribution, so please if you are a user
of AxoSyslog, contribute.

We would like to thank the following people for their contribution:

Andras Mitzki, Attila Szakacs, Balazs Scheidler, Dmitry Levin, Hofi,
László Várady, Szilárd Parrag, shifter

axosyslog-charts-0.10.0

AxoSyslog for Kubernetes

axosyslog-4.8.0

4.8.0

We are excited to announce the first independent release of AxoSyslog.

AxoSyslog is binary-compatible with syslog-ng [1] and serves as a drop-in replacement.

Explore and learn more about the new features in our release announcement blog post.

Packages are available for Debian and Ubuntu from our APT repository.
RPM packages are available in the Assets section (we’re working on an RPM repository as well, and hope to have it up and running for the next release).

Check out the AxoSyslog documentation for all the details.

Highlights

Send log messages to Elasticsearch data stream

The elasticsearch-datastream() destination can be used to feed Elasticsearch data streams.

Example config:

elasticsearch-datastream(
  url("https://elastic-endpoint:9200/my-data-stream/_bulk")
  user("elastic")
  password("ba3DI8u5qX61We7EP748V8RZ")
);

(#178)

Features

• s3(): Introduced server side encryption related options

  server-side-encryption() and kms-key() can be used to configure encryption.

  Currently only server-side-encryption("aws:kms") is supported.
  The kms-key() should be:

  • an ID of a key
  • an alias of a key, but in that case you have to add the alias/prefix
  • an ARN of a key

  To be able to use the aws:kms encryption the AWS Role or User has to have the following
  permissions on the given key:

  • kms:Decrypt
  • kms:Encrypt
  • kms:GenerateDataKey

  Check this page on why the kms:Decrypt is mandatory.

  Example config:

  destination d_s3 {
    s3(
      bucket("log-archive-bucket")
      object-key("logs/syslog")
      server-side-encryption("aws:kms")
      kms-key("alias/log-archive")
    );
  };
  

  See the S3 documentation for more details.
  (#127)

• opentelemetry(), loki(), bigquery() destination: Added headers() option

  With this option you can add gRPC headers to each RPC call.

  Example config:

  opentelemetry(
    ...
    headers(
      "organization" => "Axoflow"
      "stream-name" => "axo-stream"
    )
  );
  

  (#192)

Bugfixes

• csv-parser(): fix escape-backslash-with-sequences dialect on ARM
  (#4947)

• csv-parser() produced invalid output on platforms where char is an unsigned type.
  (#4947)

• rate-limit(): Fixed a crash which occured on a config parse failure.
  (#169)

• macros: Fixed a bug which always set certain macros to string type

  The affected macros are $PROGRAM, $HOST and $MESSAGE.
  (#162)

• wildcard-file(): fix crash when a deleted file is concurrently written
  (#160)

• disk-buffer(): fix crash when pipeline initialization fails

  log_queue_disk_free_method: assertion failed: (!qdisk_started(self->qdisk))
  (#128)

• syslog-ng-ctl query: fix showing Prometheus metrics as unnamed values

  none.value=726685
  (#129)

• syslog-ng-ctl query: show timestamps and fix g_pattern_spec_match_string assert
  (#129)

Other changes

• packages/dbld: add support for Ubuntu 24.04 (Noble Numbat)
  (#4925)

• syslog-ng-ctl: do not show orphan metrics for stats prometheus

  As the stats prometheus command is intended to be used to forward metrics
  to Prometheus or any other time-series database, displaying orphaned metrics
  should be avoided in order not to insert new data points when a given metric
  is no longer alive.

  In case you are interested in the last known value of orphaned counters, use
  the stats or query subcommands.
  (#4921)

• bigquery(), loki(), opentelemetry(), cloud-auth(): C++ modules can be compiled with clang

  Compiling and using these C++ modules are now easier on FreeBSD and macOS.
  (#4933)

• s3(): new metric syslogng_output_event_bytes_total
  (#4958)

[1] syslog-ng is a trademark of One Identity.

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Credits

AxoSyslog is developed as a community project, and as such it relies
on volunteers, to do the work necessary to produce AxoSyslog.

Reporting bugs, testing changes, writing code or simply providing
feedback is an important contribution, so please if you are a user
of AxoSyslog, contribute.

We would like to thank the following people for their contribution:

Arpad Kunszt, Attila Szakacs, Balazs Scheidler, Dmitry Levin,
Ferenc HERNADI, Gabor Kozma, Hofi, Ilya Kheifets, Kristof Gyuracz,
László Várady, Máté Őry, Robert Fekete, Szilard Parrag, Wolfram Joost,
shifter