v0.27.2

Release date: 2024-03-18

Very minor release to improve debugging by adding timestamps to
metric-related messages. Also a few library bumps for security advisories.

v0.27.1

Release date: 2023-12-01

Minor, second attempt at fixing the ban transformer. Should no longer
cause out of bounds errors. Hopefully.

v0.27.0

Release date: 2023-11-22

Two minor, but important bug fixes:

• Fixes an issue with out-of-bounds checking on the ban transformer.
• Make the SNMP trap sender iterate over all metrics in a container, not
  just the first.

Other than that, some more relevant documentaiton and examples.

v0.26.0

Release date: 2023-10-12

At a glance: Improvements to the SNMP sender and security fixes.

This addresses:

• CVE-2023-37475 (avro issues)
• CVE-2023-39325 (HTTP/2 rapid reset)

The SNMP trap sender fixes included make the sender more usable. It allows
manually configuring snmpTrapOID among other things, needed to make the
sender actually send valid snmpTraps.

v0.25.1

Release date: 2023-09-25

Allow Dictsplit to split on the top-object.

Previously Skogul could split::

{
	"metrics": [
		{
			"metadata": { },
			"timestamp": { ... },
			"data": {
				"foo": {
					"eth0": { "key": 123 },
					"eth1": { "key": 567 }
				}
			}
		}
	]
}

Into::

{
	"metrics": [
		{
			"timestamp": { ... },
			"metadata": { "name": "eth0" },
			"data": { "key": 123 }
		},
		{
			"timestamp": { ... },
			"metadata": { "name": "eth1" },
			"data": { "key": 567 }
		}
	]
}

but always needed a top key bellow "data" to refer to. Now you can also
split the following original::

{
	"metrics": [
		{
			"metadata": { },
			"timestamp": { ... },
			"data": {
				"eth0": { "key": 123 },
				"eth1": { "key": 567 }
			}
		}
	]
}

To do this, simply omit the Field option (or leave it as an empty array).

E.g.::

"transformers": {
	"type": "dictsplit",
	"metadataname": "name"
}

As before, "Metadataname" will be the metadata key where the dictionary
index is stored.

Also, some printf-debugging was accidentally included in v0.25.0, this is
removed.

v0.25.0

Release date: 2023-08-21

Skogul, now with more blobs.

The blob encoder and "parser" introduces a way of shuffeling arbitrary data
through Skogul without actually parsing it. By using the blob "parser",
Skogul will simply add the input data to a generic "data" key as a byte
array. This can then be forwarded and handled with any regular Skogul
mechanism. The regular JSON encoding will actually base64-encode byte
arrays, so you can forward it just fine like that.

To unpack the data, you can use the blob encoder, which should return the
data to the original unparsed state. Since you may have introduced a batch
sender and put multiple metrics into a container, the blob encoder has an
optional delimiter which will be injected in between metrics.

The TCP sender expands upon the net-sender. Technically, the net-sender can
do TCP just fine, but it is extremely inefficient at scale, because it will
open a new TCP connection for each container sent, instead of re-using it.
The TCP sender tries to address this and has been tested. It is still not
perfect in error-handling, so it should not be used if you need a guarantee
that messages are delivered, but it is actually reasonably performant.

Putting this together you can receive syslog messages on a UDP port and
forward it with the TCP sender without either side knowing there was
something like Skogul in between, and thus making sure rsyslogd doesn't get
backed up and blocks due to a slow receiving end and full buffers. NOT THAT
THAT EVER HAPPENS.

docs/examples/misc/tcp.json includes an example of two receivers using the
same handler, the blob encoder and tcp sender.

v0.24.0

Release date: 2023-08-08

Adds two new, somewhat experimental modules: an SNMP trap sender and
rabbitmq sender and receiver. Both are expected to get some changes after
we get them tested, but of course any feedback is welcome.

v0.23.0

Release date: 2023-06-06

Bump Juniper telemetry protocolbuffers from Junos 21.3R1 to 23.2R1.

Adds a small fix to the influx sender, preventing it from sending
empty tag strings to Influx. Fixes #294.

Adds support for renaming metadata and data fields using the "rename"
key to the metadata/data transformer. Example::

"transformers": {
	"ok": {
		"type": "data",
		"rename": [
			{ "source": "old_key_name", "destination": "new_key_name" }
		]
}

v0.22.0

Release date: 2023-05-09

Add JSON unmarshalling to SQL receiver, add unflatten to metadata
transformer as well, and allow banning with ban transformer by path.

v0.21.1

Release date: 2023-02-27

Add SIGHUP-handling to file-sender.

Add JSON-casting to cast transformer.

Upgrade to Go 1.20, and bump various libs past security lol.