Decompressing log files from Microsoft Azure Blob

NickSegalle — Sun, 31 Jan 2021 19:11:51 GMT

I have logs that are stored in Micrsoft Blob Storage which are compressed as .xz files, but they are not named with that extension, they are in the format: kuberenetes-<datetime> ( example: kubernetes-202101310701). What I'm trying to do is ingest these logs into Splunk using the Microsoft Cloud Services app. Because these files are compressed, I believe I need to run the unarchive_cmd against it using props.conf, but I'm not sure this is even supported with this app. I've searched high and low and have not come across any information that supports it. As a side note, these files are kuberenetes logs coming from SAP CC2V so I do not have any control of how they are written to blob storage, I can only access them after the fact. When I enable the application the data starts to stream in but it's all gibberish because the files are compressed.

Here is what I get:

1/31/21
10:32:25.000 AM

Geq��)�5xi� ��B�;X�%��Ul��N�ioG��X��o��47`�RK�Bd�g�x�A��ʪe��a�E�V��xUS<x�5=�H�R�4��2

Type Field Value Actions

Event		timestamp	none
Time		_time	2021-01-31T10:32:25.000-08:00
Default		host	ip-10-151-4-90
	index	test
	punct	)t;%<=
	source	kubernetes-202101311433
	sourcetype	mscs:storage:blob:k8
	splunk_server	idx-i-<redacted>?.splunkcloud.com

Below is what I'm trying...

input.conf:

[mscs_storage_blob://SAP S3 Logs] disabled = 0 account = SAP S3 blob_list = kubernetes* blob_mode = append collection_interval = 3600 container_name = commerce-logging sourcetype = mscs:storage:blob:k8 index = test

props.conf:

[source::...(.*)] invalid_cause = archive unarchive_cmd = /usr/bin/xz -cd - sourcetype = mscs:storage:blob:k8 KV_MODE = json NO_BINARY_CHECK = true [mscs_storage_blob://SAP S3 Logs] invalid_cause = archive unarchive_cmd = /usr/bin/xz -cd - sourcetype = mscs:storage:blob:k8 KV_MODE = json NO_BINARY_CHECK = true [mscs:storage:blob] invalid_cause = archive unarchive_cmd = /usr/bin/xz -cd - sourcetype = mscs:storage:blob:k8 KV_MODE = json NO_BINARY_CHECK = true [mscs:storage:blob:k8] invalid_cause = archive unarchive_cmd = /usr/bin/xz -cd - sourcetype = mscs:storage:blob:k8 KV_MODE = json NO_BINARY_CHECK = true

I know the props.conf is not correct or does not need that many stanzas, but I tried adding all of these in an attempt to get it to work as I'm not even sure it's using the props.conf file. As a side note, if I decompress the file in Azure Blob and then ingest it, it works perfectly. So the question is, can I use the 'invalid_cause' and 'unarchive_cmd' in the props for Microsoft Cloud Services app? If this doesn't work I need to come up with another solution, and I'm thinking I can just copy the files locally and then run it through a standard file monitor process and attempt to run the unarchive command there.

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Decompressing log files from Microsoft Azure Blob