Logs Management (#13291)

This PR adds the logs-management external plugin. 
See the included README for an extensive list of features. 
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* Add proper status return in JSON response of functions

* Add column info to functions

* Escape special characters when returning JSON response

* Add proper functions help and defaults. Fix help not working

* Add 'logs_management_meta' object in functions results

* Fix compiler warnings

* Replace tabs with 3 spaces in web_client_api_request_v1_logsmanagement_sources()

* Add 'sources' in functions to display list of log sources

* Update functions column values for logs

* Update chart titles and remove '/s' from units

* Add support for compound queries in circular buffers

* Refactor circ_buff_search() to get rid of circ_buff_search_compound()

* Fix incorrect docker events nano timestamp padding

* Fixed botched rebasing

* Replace get_unix_time_ms() with now_realtime_msec()

* Remove binary generation from Fluent-Bit lib build

* Fix compiler warnings due to new timestamp type

* Remove STDIN and STDOUT support from Fluent-Bit library

* Initial support for FLB_KMSG kernel logs collection

* Add kernel logs charts

* Add kernel logs subsystem and device charts

* Skip collection of pre-existing logs in kmsg ring buffer

* Add example of custom kmsg charts

* Add extra initialization error logs

* Fix bug of Docker Events collector failure disabling whole logs management engine

* Remove reduntant FLB output code

* Remove some obsolete TODO comments

* Remove some commented out error/debug prints

* Disable some Fluent-Bit config options not required

* Make circular buffer spare items option configurable

* Add DB mode configuration option

* Replace p_file_infos_arr->data[i] with p_file_info in db_api.c

* Remove db_loop due to all function calls being synchronous

* Add initial README.md

* Add DB mode = none changes

* Add a simple webpage to visualize log query results

* Add support for source selection to logs_query.html

* Add option to query multiple log sources

* Mark non-queryable sources as such in logs_query.html

* Add option to use either GET or functions request in logs_query.html

* Install logs_query.html when running stress tests

* Update README.md requirements

* Change installer behavior to build logs management by default

* Disable logs management at runtime by default

* Add global db mode configuration in 'logs management' config section

* Split logsmanagement.conf into required & optional sections

* Remove --enable-logsmanagement from stress test script

* Add global config option for 'circular buffer max size MiB'

* Add global config option for 'circular buffer drop logs if full'

* Update 'General Configuration' in README.md

* Add global config option for remaining optional settings

* Add systemd collector requirements to TOC

* README: Convert general configuration to table

* README: Fix previous botched commit

* Enable logs management by default when building for stress testing

* Move logging to collector.log from error.log

* Fix contenttype compilation errors

* Move logging to collector.log in plugin_logsmanagement.c

* Rename 'rows' to 'records' in charts

* Add Netdata error.log parsing

* Add more dashboard descriptions

* Sanitize chart ids

* Attempt to fix failing CI

* Update README.md

* Update README.md

* Another attempt to fix CI failures

* Fix undefined reference to 'uv_sleep' on certain platforms

* Support FLB forward input and FLB output plugins.

Squashed commit of the following:

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Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Apr 13 16:41:09 2023 +0300

    Remove error.log from stock config

commit bbdc62c2c9727359bc3c8ef8c33ee734d0039be7
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Apr 13 16:37:48 2023 +0300

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commit 09b0aa4268ec1ccef160c99c5d5f31b6388edd28
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Apr 13 14:34:17 2023 +0300

    Some code and config cleanup

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Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Apr 13 01:33:19 2023 +0300

    Add initialization of Fluent Bit user-configured outputs

commit c96e9fe9cea96549aa5eae09d0deeb130da02793
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Apr 4 23:13:16 2023 +0100

    Complete read of parameters for FLB outputs config

commit 00988897f9b86d1ecc5c141b19df7ad7d74f7e96
Author: Dim-P <dimitris1703@gmail.com>
Date:   Mon Apr 3 19:43:31 2023 +0100

    Update README.md

commit 6deea5399c2707942aeaa51408f999ca45dfd351
Author: Dim-P <dimitris1703@gmail.com>
Date:   Mon Apr 3 16:02:28 2023 +0100

    Refactor Syslog_parser_config_t and add Flb_socket_config_t

commit 7bf998a4c298bbd489ef735c56a6e85a137772c9
Author: Dim-P <dimitris1703@gmail.com>
Date:   Mon Apr 3 14:19:57 2023 +0100

    Update README.md

commit c353d194b12c54f134936072ebaded0424d73cc0
Author: Dim-P <dimitris1703@gmail.com>
Date:   Fri Mar 31 14:52:57 2023 +0100

    Update README.md

commit 6be726eaff3738ba7884de799aa52949833af65a
Author: Dim-P <dimitris1703@gmail.com>
Date:   Fri Mar 31 13:06:29 2023 +0100

    Update README. Fix docker_events streaming

commit 6aabfb0f1ef0529a7a0ecbaf940bc0952bf42518
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Mar 30 21:27:45 2023 +0100

    Fix stuck in infinite loop bug for FLB_GENERIC, FLB_WEB_LOG and FLB_SERIAL remote log sources

commit eea6346b708cc7a5ce6e2249366870f4924eabae
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Mar 30 21:04:12 2023 +0100

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commit bc9c5a523b0b0ab5588adbff391a43ba8d9a0cdf
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Mar 30 15:51:39 2023 +0100

    Basic streaming works

commit 4c80f59f0214bc07895f0b2edca47cb02bc06420
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Mar 28 22:05:22 2023 +0100

    WIP

commit eeb37a71b602fb0738fe8077ccddc0a8ce632304
Author: Dim-P <dimitris1703@gmail.com>
Date:   Mon Mar 27 22:52:09 2023 +0100

    Add generic forward streaming input

commit 1459b91847c80c4d97de96b75b00771039458ad6
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Mar 23 18:50:14 2023 +0000

    FLB_FORWARD: WIP

* Add number of logs per item in DB and in queries response

* Fix wrong number of lines stored in DB for web logs

* Refactor number of logs parsers and charts code

* Add option to toggle number of collected logs metrics and charts

* Disable kmsg log collector by default

* Fix logs_query.html to work with any server ip

* Fix regressed wrong number of web log lines bug

* Change query quota type from size_t to long long

* Update alpine version when searching for fts-dev requirements

* Update query results to return both requested and actual quota

* Fix bug of circ buffs not being read if head == read but not empty

* Squashed commit of the following:

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Date:   Thu May 4 20:02:36 2023 +0100

    Comment out some debug prints

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Author: Dim-P <dimitris1703@gmail.com>
Date:   Fri Apr 28 19:21:54 2023 +0100

    Fix wrong filenames in BLOBS_TABLE after rotation

commit 6055fc2893b48661af324f20ee61511a40abbc02
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Date:   Fri Apr 28 12:22:04 2023 +0100

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commit 0bb5210b0847f4b7596f633ec96fc10aa8ebc791
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Date:   Tue Apr 25 16:47:29 2023 +0300

    Various fixes.

    Fix num_lines calculation.
    Add debug prints for circ buffers.
    Remove circ buff spare items option.
    Fix calculation of circ buff memory consumption.
    Add buff_realloc_rwlock for db_mode = none case.
    Fix circ buff read to be done correctly when buff is full.

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Author: Dim-P <dimitris1703@gmail.com>
Date:   Fri Apr 21 16:03:50 2023 +0300

    Fix freez() on non-malloced address

commit cce6d09e9cf9b847aface7309643e2c0a6041390
Author: Dim-P <dimitris1703@gmail.com>
Date:   Fri Apr 21 15:41:25 2023 +0300

    Add option to dynamically expand circ buffs when full

* Use log timestamps when possible, instead of collection timestamps.
Also, add config options for Fluent Bit engine and remove tail_plugin.

Squashed commit of the following:

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    Update README.md to reflect log timestamp changes

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commit 70d0ea6f8d272fff318aa3095d90a78dcc3411a7
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commit 5716420838771edb7842be4669bf96235b15cf71
Author: Dim-P <dimitris1703@gmail.com>
Date:   Mon May 15 16:01:41 2023 +0100

    Fix do_custom_charts_update() to work for all log sources

commit a8def8f53fd25c3efa56ef27e267df3261913a8e
Author: Dim-P <dimitris1703@gmail.com>
Date:   Fri May 12 18:20:20 2023 +0100

    Remove GENERIC and WEB_LOG cases. Remove tail_plugin.c/h. Remove generic_parser().

commit 1cf05966e33491dbeb9b877f18d1ea8643aabeba
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Date:   Fri May 12 16:54:59 2023 +0100

    Fix FLB_GENERIC and FLB_SERIAL to work with new timestamp logic

commit df3266810531f1af5f99b666fbf44c503b304a39
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Date:   Fri May 12 14:55:04 2023 +0100

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Author: Dim-P <dimitris1703@gmail.com>
Date:   Fri May 12 14:28:33 2023 +0100

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commit 941aa80cb55d5a7d6fe8926da930d9803be52312
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Date:   Thu May 11 22:27:39 2023 +0100

    Update plugin_logsmanagement_web_log to use new timestamp logic and to support delayed logs. Refactor req_method metrics code.

commit 427a7d0e2366d43cb5eab7daa1ed82dfc3bc8bc8
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue May 9 20:26:08 2023 +0100

    Update plugin_logsmanagement_kernel to use new timestamp logic and to support delayed charts

commit a7e95a6d3e5c8b62531b671fd3ec7b8a3196b5bb
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue May 9 15:22:14 2023 +0100

    Update plugin_logsmanagement_systemd to use new timestamp logic and support delayed charts

commit 48237ac2ce49c82abdf2783952fd9f0ef05d72e1
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Date:   Tue May 9 13:29:44 2023 +0100

    Refactor number of collected logs chart update code

commit a933c8fcae61c23fa0ec6d0074526ac5d243cf16
Author: Dim-P <dimitris1703@gmail.com>
Date:   Mon May 8 22:11:19 2023 +0100

    Update plugin_logsmanagement_docker_ev to use new timestamp logic and support delayed charts

commit 5d8db057155affd5cb721399a639d75a81801b7f
Author: Dim-P <dimitris1703@gmail.com>
Date:   Fri May 5 15:18:06 2023 +0100

    Change some Fluent Bit collectors to use log timestamps instead of collection timestamps

* Remove some unused defines and typedefs

* Improve flb_init()

* Update file-level doxygen. Add SPDX license declaration.

* Better handling of termination of Fluent Bit

* Better handling of DB errors. Various fixes.

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commit 9e05758a4ecfac57a0db14757cff9536deda51d8
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Date:   Thu Jun 1 14:23:34 2023 +0100

    Update DB mode and dir when switching to db_mode_none

commit d37d4c3d79333bb9fa430650c13ad625458620e8
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    Fix flb_stop() SIGSEGV

commit 892e231c68775ff1a1f052d292d26384f1ef54b1
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Date:   Mon May 29 17:14:17 2023 +0100

    More error handling changes in db_init(). Change some global default settings if stress testing.

commit eb0691c269cd09054190bf0ee9c4e9247b4a2548
Author: Dim-P <dimitris1703@gmail.com>
Date:   Fri May 26 23:29:12 2023 +0100

    Better handling of db writer threads errors. Add db timings charts

* Fix mystrsep() replaced by strsep_skip_consecutive_separators()

* Fix older GCC failure due to label before declaration

* Fix failed builds when using libuv <= v1.19

* Fix some Codacy warnings

* Fix warning: implicit declaration of function ‘strsep’

* Use USEC_PER_SEC instead of 1000000ULL

* Use UUID_STR_LEN instead of GUID_LEN + 1

* Combine multiple 'ln -sf' Docker instructions to one

* Update README with systemd development libraries requirement

* Comment out mallocz() success checkes in parser_csv()

* Fix shellcheck warnings

* Remove asserts for empty SYSLOG_IDENTIFIER or PID

* Fix FreeBSD failing builds

* Fix some more shellcheck warnings

* Update Alpine fts-dev required packages

* First changes to use web log timestamp for correct metrics timings

* Initial work to add test_parse_web_log_line() unit test

* Complete test_parse_web_log_line() tests

* Improve parse_web_log_line() for better handling of \n, \r, double quotes etc.

* Fix 'Invalid TIME error when timezone sign is negative

* Add more logs to compression unit test case

* Misc read_last_line() improvements

* Fix failing test_auto_detect_web_log_parser_config() when test case terminated without '\n'

* Remove unused preprocessor macro

* Factor out setup of parse_config_expected_num_fields

* Add test for count_fields()

* Add unit test for read_last_line()

* Fix a read_last_line() bug

* Remove PLUGIN[logsmanagement] static thread and update charts synchronously, right before data buffering

* Fix web log parser potential SIGSEGV

* Fix web log metrics bug where they could show delayed by 1 collection interval

* WIP: Add multiline support to kmsg logs and fix metric timings

* Fix kmsg subsystem and device parsing and metrics

* Add option 'use log timestamp' to select between log timestamps or collection timestamps

* Add 'Getting Started' docs section

* Move logs management functions code to separate source files

* Add 'Nginx access.log' chart description

* Remove logsmanagement.plugin source files

* Fix some memory leaks

* Improve cleanup of logsmanagement_main()

* Fix a potential memory leak of fwd_input_out_cb

* Better termination and cleanup of main_loop and its handles

* Fix main_db_dir access() check bug

* Avoid uv_walk() SIGSEGV

* Remove main_db_dir access() check

* Better termination and cleanup of DB code

* Remove flb_socket_config_destroy() that could cause a segmentation fault

* Disable unique client IPs - all-time chart by default

* Update README.md

* Fix debug() -> netdata_log_debug()

* Fix read_last_line()

* Fix timestamp sign adjustment and wrong unit tests

* Change WEB_CLIENT_ACL_DASHBOARD to WEB_CLIENT_ACL_DASHBOARD_ACLK_WEBRTC

* Do not parse web log timestamps if 'use_log_timestamp = no'

* Add Logs Management back into buildinfo.c

* Update README.md

* Do not build Fluent Bit executable binary

* Change logs rate chart to RRDSET_TYPE_LINE

* Add kludge to prevent metrics breaking due to out of order logs

* Fix wrong flb_tmp_buff_cpy_timer expiration

* Refactor initialization of input plugin for local log sources.

* Rename FLB_GENERIC collector to FLB_TAIL.

* Switch 'Netdata fluentbit.log' to disabled by default

* Add 'use inotify' configuration option

* Update  in README.md

* Add docker event actions metrics

* Update README.md to include event action chart

* Remove commented out PLUGIN[logsmanagement] code block

* Fix some warnings

* Add documentation for outgoing log streaming and exporting

* Fix some code block formatting in README.md

* Refactor code related to error status of log query results and add new invalid timestamp case

* Reduce query mem allocs and fix end timestamp == 0 bug

* Add support for duplicate timestamps in db_search()

* Add support for duplicate timestamps in circ_buff_search()

* Fix docker events contexts

* Various query fixes prior to reverse order search.

- Add reverse qsort() function in circ buffers.
- Fix issues to properly support of duplicate timestamps.
- Separate requested from actual timestamps in query parameters.
- Rename results buffer variable name to be consistent between DB and
  buffers.
- Remove default start and end timestamp from functions.
- Improve handling of invalid quotas provided by users.
- Rename 'until' timestamp name to 'to'.
- Increase default quota to 10MB from 1MB.
- Allow start timestamp to be > than end timestamp.

* Complete descending timestamp search for circular buffers

* Complete descending timestamp search for DB

* Remove MEASURE_QUERY_TIME code block

* Complete descending timestamp search when data resides in both DB and circular buffers

* Use pointer instead of copying res_hdr in query results

* Refactor web log timezone parsing to use static memory allocation

* Add stats for CPU user & system time per MiB of query results

* Micro-optimization to slightly speed up queries

* More micro-optimizations and some code cleanup

* Remove LOGS_QUERY_DATA_FORMAT_NEW_LINE option

* Escape iscntrl() chars at collection rather at query

* Reduce number of buffer_strcat() calls

* Complete descending timestamp order queries for web_api_v1

* Complete descending timestamp order queries for functions

* Fix functions query timings to match web_api_v1 ones

* Add MQTT message collector

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commit dbe515372ee04880b1841ef7800abe9385b12e1c
Author: Dim-P <dimitris1703@gmail.com>
Date:   Mon Aug 21 15:18:46 2023 +0100

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commit c0b5dbcb7cdef8c6fbd5e72e7bdd08957a0fd3de
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Date:   Mon Aug 21 12:54:33 2023 +0100

    Fix issue with duplicate Log_Source_Path in DB, introduced in commit e417af3

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Date:   Thu Aug 17 18:03:39 2023 +0100

    Update functions logsmanagement help output

* Inhibit Fluent Bit build warnings

* Fix missing allow_subpaths value in api_commands_v1[].

* Fix missing HTTP_RESP_BACKEND_FETCH_FAILED error

* Fix an enum print warning

* Remove systemd-devel requirement from README and fix codacy warnings

* Update Alpine versions for musl-fts-dev

* Update Fluent Bit to v2.1.8

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commit 446b0d564626055a0a125f525d0bd3754184b830
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Date:   Tue Aug 22 12:21:25 2023 +0100

    Update Fluent Bit submodule to v2.1.8

* Add logs_management_unittest() to CI 'unittest'

* Remove obsolete query testing files

* Patch Fluent Bit log format to match netdata's format

* Update README with instructions on how to monitor Podman events logs

* Fix core dump in case of flb_lib_path dlopen()

* Fix some potential compiler warnings

* Fix queries crash if logs manag engine not running

* Much faster termination of LOGS MANAGEMENT

* Add facets support and other minor fixes.

logsmanagement_function_execute_cb() is replaced by
logsmanagement_function_facets() which adds facets support to logs
management queries.

Internal query results header now includes additional fields
(log_source, log_type, basename, filename, chartname), that are used as facets.

Queries now support timeout as a query parameter.

A web log timestamp bug is fixed (by using timegm() instead of mktime().

web_api_v1 logsmanagement API is only available in debugging now.

Squashed commit of the following:

commit 32cf0381283029d793ec3af30d96e6cd77ee9149
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Sep 19 16:21:32 2023 +0300

    Tidy up

commit f956b5846451c6b955a150b5d071947037e935f0
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Sep 19 13:30:54 2023 +0300

    Add more accepted params. Add data_only option. Add if_modified_since option.

commit 588c2425c60dcdd14349b7b346467dba32fda4e9
Author: Dim-P <dimitris1703@gmail.com>
Date:   Mon Sep 18 18:39:50 2023 +0300

    Add timeout to queries

commit da0f055fc47a36d9af4b7cc4cefb8eb6630e36d9
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Sep 14 19:17:16 2023 +0300

    Fix histogram

commit 7149890974e0d26420ec1c5cfe1023801dc973fa
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Sep 14 17:58:52 2023 +0300

    Add keyword query using simple patterns and fix descending timestamp values

commit 0bd068c5a76e694b876027e9fa5af6f333ab825b
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Sep 14 13:54:05 2023 +0300

    Add basename, filename, chartname as facets

commit 023c2b5f758b2479a0e48da575cd59500a1373b6
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Sep 14 13:26:06 2023 +0300

    Add info and sources functions options

commit ab4d555b7d445f7291af474847bd9177d3726a76
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Sep 14 12:54:37 2023 +0300

    Fix facet id filter

commit a69c9e2732f5a6da1764bb57d1c06d8d65979225
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Sep 14 12:07:13 2023 +0300

    WIP: Add facet id filters

commit 3c02b5de81fa8a20c712863c347539a52936ddd8
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Sep 12 18:19:17 2023 +0300

    Add log source and log type to circ buff query results header

commit 8ca98672c4911c126e50f3cbdd69ac363abdb33d
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Sep 12 18:18:13 2023 +0300

    Fix logsmanagement facet function after master rebasing

commit 3f1517ad56cda2473a279a8d130bec869fc2cbb8
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Sep 12 18:14:25 2023 +0300

    Restrict /logsmanagement to ACL_DEV_OPEN_ACCESS only

commit 8ca98d69b08d006c682997268d5d2523ddde6be0
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Sep 12 14:40:22 2023 +0300

    Fix incorrectly parsed timestamps due to DST

commit f9b0848037b29c7fcc46da951ca5cd9eb129066f
Author: Dim-P <dimitris1703@gmail.com>
Date:   Mon Sep 11 13:42:18 2023 +0300

    Add logs_management_meta object to facet query results

commit babc978f6c97107aaf8b337d8d31735d61761b6a
Author: Dim-P <dimitris1703@gmail.com>
Date:   Mon Sep 11 13:03:52 2023 +0300

    Query all sources if no arguments provided

commit 486d56de87af56aae6c0dc5d165341418222ce8b
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Sep 7 18:38:04 2023 +0300

    Add log_source and log_type (only for DB logs) as facets. Add relative time support

commit b564c12843d355c4da6436af358d5f352cb58bfe
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Sep 7 13:47:20 2023 +0300

    Working facet with descending timestamps

commit 68c6a5c64e8425cf28ec16adfb0c50289caa82a9
Author: Dim-P <dimitris1703@gmail.com>
Date:   Wed Sep 6 01:55:51 2023 +0300

    WIP

* Fix linking errors

* Convert logs management to external plugin.

Squashed commit of the following:

commit 16da6ba70ebde0859aed734087f04af497ce3a77
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Oct 24 18:44:12 2023 +0100

    Use higher value of update every from netdata.conf or logsmanagement.d.conf

commit 88cc3497c403e07686e9fc0876ebb0c610a1404c
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Oct 24 18:43:02 2023 +0100

    Tidy up

commit c3fca57aac169842637d210269519612b1a91e28
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Oct 24 18:02:04 2023 +0100

    Use external update_every from agent, if available

commit f7470708ba82495b03297cdf8962a09b16617ddd
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Oct 24 17:40:46 2023 +0100

    Re-enable debug logs

commit b34f5ac6a2228361ab41df7d7e5e713f724368c0
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Oct 24 15:49:20 2023 +0100

    Remove old API calls from web_api_v1.c/h

commit 7fbc1e699a7785ec837233b9562199ee6c7684da
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Oct 24 15:32:04 2023 +0100

    Add proper termination of stats charts thread

commit 4c0fc05c8b14593bd7a0aa68f75a8a1205e04db4
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Oct 24 15:31:36 2023 +0100

    Add tests for logsmanag_config functions

commit 4dfdacb55707ab46ed6c2d5ce538ac012574b27e
Author: Dim-P <dimitris1703@gmail.com>
Date:   Mon Oct 23 22:01:19 2023 +0100

    Remove unused headers from logsmanagement.c

commit b324ef396207c5c32e40ea9ad462bf374470b230
Author: Dim-P <dimitris1703@gmail.com>
Date:   Mon Oct 23 21:56:26 2023 +0100

    Remove inline from get_X_dir() functions

commit e9656e8121b66cd7ef8b5daaa5d27a134427aa35
Author: Dim-P <dimitris1703@gmail.com>
Date:   Mon Oct 23 21:50:32 2023 +0100

    Proper termination when a signal is received

commit b09eec147bdeffae7b268b6335f6ba89f084e050
Author: Dim-P <dimitris1703@gmail.com>
Date:   Mon Oct 23 20:12:13 2023 +0100

    Refactor logs management config code in separate source files

commit 014b46a5008fd296f7d25854079c518d018abdec
Author: Dim-P <dimitris1703@gmail.com>
Date:   Mon Oct 23 14:54:47 2023 +0100

    Fix p_file_info_destroy() crash

commit e0bdfd182513bb8d5d4b4b5b8a4cc248ccf2d64e
Author: Dim-P <dimitris1703@gmail.com>
Date:   Mon Oct 23 14:18:27 2023 +0100

    Code refactoring and cleanup

commit 6a61cb6e2fd3a535db150b01d9450f44b3e27b30
Author: Dim-P <dimitris1703@gmail.com>
Date:   Fri Oct 20 14:08:43 2023 +0100

    Fix 'source:all' queries

commit 45b516aaf819ac142353e323209b7d01e487393f
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Oct 19 21:51:05 2023 +0100

    Working 'source:...' queries and regular data queries (but not 'source:all')

commit 8064b0ee71c63da9803f79424802f860e96326e5
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Oct 19 15:34:23 2023 +0100

    Fix issue due to p_file_info_destroy()

commit a0aacc9cd00cea60218c9bfd2b9f164918a1e3de
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Oct 17 22:06:34 2023 +0100

    Work on facet API changes

commit 480584ff9040c07e996b14efb4d21970a347633f
Author: Dim-P <dimitris1703@gmail.com>
Date:   Mon Oct 16 21:43:06 2023 +0100

    Add stats charts, running as separate thread

commit 34d582dbe4bf2d8d048afab41681e337705bc611
Author: Dim-P <dimitris1703@gmail.com>
Date:   Mon Oct 16 16:24:02 2023 +0100

    Add SSL cipher charts

commit ced27ee4e2c981d291f498244f2eef2556a074fb
Author: Dim-P <dimitris1703@gmail.com>
Date:   Sun Oct 15 21:33:29 2023 +0100

    Add Response code family, Response code, Response code type, SSL protocol charts

commit 40c4a1d91892d49b1e4e18a1c3c43258ded4014d
Author: Dim-P <dimitris1703@gmail.com>
Date:   Sat Oct 14 00:48:48 2023 +0100

    Add more web log charts

commit 890ed3ff97153dd18d15df2d1b57a181bc498ca8
Author: Dim-P <dimitris1703@gmail.com>
Date:   Fri Oct 13 22:14:11 2023 +0100

    Add web log vhosts and ports charts

commit 84733b6b1d353aff70687603019443610a8500c3
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Oct 12 21:40:16 2023 +0100

    Add systemd charts

commit 14673501e8f48560956f53d5b670bbe801b8f2ae
Author: Dim-P <dimitris1703@gmail.com>
Date:   Wed Oct 11 00:28:43 2023 +0100

    Add MQTT charts

commit 366eb63b0a27dde6f0f8ba65120f34c18c1b21fd
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Oct 10 21:46:19 2023 +0100

    Complete kmsg changes. Reduce mem usage. Fix a dictionary key size bug

commit 3d0216365a526ffbc9ce13a20c45447bfccb47d9
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Oct 10 19:18:41 2023 +0100

    Add kmsg Subsystem charts

commit e61af4bb130a5cf5a5a78133f1e44b2b4c457b24
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Oct 10 16:21:29 2023 +0100

    Fix bug of wrong kmsg timestamps in case of use_log_timestamp == 0

commit 03d22e0b26bddf249aab431a4f977bbd5cde98ca
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Oct 10 16:20:47 2023 +0100

    Add kmsg charts, except for Subsystem and Device

commit f60b0787537a21ed3c4cea5101fcddc50f3bc55a
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Oct 10 13:12:13 2023 +0100

    Initialise all docker events chart dimensions at startup

commit 5d873d3439abaf3768530cb5b72c6b4ef6565353
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Oct 10 00:53:35 2023 +0100

    WIP: Add Docker events logs

commit 2cc3d6d98f58fc3ab67a8da3014210b14d0926a1
Author: Dim-P <dimitris1703@gmail.com>
Date:   Mon Oct 9 18:52:27 2023 +0100

    Use macros for num_of_logs_charts and custom_charts functions

commit fbd48ad3c9af674601238990d74192427475f2e3
Author: Dim-P <dimitris1703@gmail.com>
Date:   Mon Oct 9 18:26:17 2023 +0100

    Refactor custom charts code for clarity and speed

commit a31d80b5dc91161c0d74b10d00bc4fd1e6da7965
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Oct 5 23:58:27 2023 +0100

    Add first working iteration of custom charts

commit b1e4ab8a460f4b4c3e2804e2f775787d21fbee45
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Oct 5 23:57:27 2023 +0100

    Add more custom charts for Netdata error.log

commit f1b7605e564da3e297942f073593cdd4c21f88e1
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Oct 5 20:39:40 2023 +0100

    Convert collected_logs_* chart updates to macros

commit 1459bc2b8bcd5ba21e024b10a8a5101048938f71
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Oct 5 19:11:54 2023 +0100

    Use rrdset_timed_done() instead of duration_since_last_update for correct chart timings

commit 876854c6ee7586a3eb9fdbf795bcc17a5fd1e6ad
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Oct 3 21:53:14 2023 +0100

    Fix some bugs in chart updates

commit ae87508485499984bcb9b72bbc7d249c4168b380
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Oct 3 21:32:55 2023 +0100

    Functioning generic_chart_init() and generic_chart_update()

commit 982a9c4108dbea9571c785b5ff8a9d1e5472066c
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Sep 28 23:32:52 2023 +0100

    Add support for multiple .conf files. Add stock examples.

commit 8e8abd0731227eb3fb3c6bcd811349575160799e
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Sep 28 17:38:30 2023 +0100

    Add support for logsmanagement.d/default.conf

commit 1bf0732217b1d9e9959e1507ea96fc2c92ffb2ff
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Sep 28 14:31:03 2023 +0100

    Add capabilities. Fix paths in logsmanagement.d.conf

commit a849d5b405bb4e5d770726fe99413a4efa7df274
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Sep 26 23:06:31 2023 +0100

    Change logs_manag_config_load()

commit b0d1783b996286cd87e0832bfb74c29a845d61fc
Author: Dim-P <dimitris1703@gmail.com>
Date:   Tue Sep 26 15:35:30 2023 +0100

    Working unit tests and argument parsing

commit 6da1b4267a4d58d3a7cbcca9507afe8158a2e324
Author: Dim-P <dimitris1703@gmail.com>
Date:   Fri Sep 22 00:32:47 2023 +0300

    Build logs-management.plugin successfully

commit 9e30efe0422e4941f99cc66998d9f42e00a24676
Author: Dim-P <dimitris1703@gmail.com>
Date:   Thu Sep 21 16:13:21 2023 +0300

    Fix print format specifier in web_client_api_request_v1_logsmanagement()

* Modify CODEOWNERS

* Update README.md

Fix indentation

* Change snprintfz() to stncpyz() in circ_buff_search(). Change remaining 'chart_name' to 'chartname'.

* Replace SQLite version function with macro

* Fix some codacy warnings

* Update README.md

* Update Fluent Bit to v2.1.10

* Remove some comments

* Fix Fluent Bit shared library linking for armv7l and FreeBSD

* Remove compression source files

* Add prefix to rrd_api.h functions

* Add more unit tests

* Fix kmsg capabilities

* Separate kmsg and systemd default paths

* Fix some memory leaks and better termination of DB

* Add iterative queries if quota is exceeded

* Fix centos7 builds

* Fix issue where SYSTEMD timestamps are not parsed

* Fix logs management packaging.

* Fix typo in DEB control file.

* Fix indentation and missing new line at EOF

* Clean up functions and update help

* Fix 400 error when no queryable sources are available

* Fix if_modified_since. Add FACET_MAX_VALUE_LENGTH

* Add delta parameter and use anchor points in queries

* Fix CodeQL #182 warning

* Fix packaging issues.

* Fix postinstall script for DEB packages.

* Improve plugin shutdown speed

* Fix docker events chart grouping

* Fix functions evloop threads not terminating upon shutdown

* Fix coverity issues

* Fix logging

* Replace 'Netdata error.log' with 'Netdata daemon.log' in 'default.conf'

* Remove 'enabled = yes/no' config in logsmanagement.d.conf

* Remove 'enabled = X' unused config from logsmanagement.d.conf

---------

Co-authored-by: Austin S. Hemmelgarn <austin@netdata.cloud>

.github/CODEOWNERS

@@ -32,6 +32,7 @@ system/ @Ferroin @tkatsoulas
 tests/ @Ferroin @vkalintiris @tkatsoulas
 web/ @thiagoftsm @vkalintiris
 web/gui/ @novykh
+logsmanagement/ @Dim-P @thiagoftsm
 
 # Ownership by filetype (overwrites ownership by directory)
 *.am @Ferroin @tkatsoulas

.github/labeler.yml

@@ -153,3 +153,6 @@ area/tests:
 
 area/web:
   - web/**
+
+area/logs-management:
+  - logsmanagement/**

.github/workflows/review.yml

@@ -234,6 +234,7 @@ jobs:
             ./.git/*
             packaging/makeself/makeself.sh
             packaging/makeself/makeself-header.sh
+            ./fluent-bit/*
 
   yamllint:
     name: yamllint

.gitignore

@@ -85,6 +85,9 @@ debugfs.plugin
 systemd-journal.plugin
 !systemd-journal.plugin/
 
+logs-management.plugin
+!logs-management.plugin/
+
 # protoc generated files
 *.pb.cc
 *.pb.h
@@ -153,6 +156,8 @@ collectors/ioping.plugin/ioping.plugin
 collectors/go.d.plugin
 web/netdata-switch-dashboard.sh
 
+logsmanagement/stress_test/stress_test
+
 # installer generated files
 /netdata-uninstaller.sh
 /netdata-updater.sh

.gitmodules

@@ -13,3 +13,8 @@
 	path = web/server/h2o/libh2o
 	url = https://github.com/h2o/h2o.git
 	ignore = untracked
+[submodule "fluent-bit"]
+	path = fluent-bit
+	url = https://github.com/fluent/fluent-bit.git
+	shallow = true
+	ignore = dirty

CMakeLists.txt

@@ -1074,6 +1074,44 @@ ELSE()
     message(STATUS "ML: disabled")
 ENDIF()
 
+set(LOGSMANAGEMENT_FILES
+        logsmanagement/rrd_api/rrd_api_docker_ev.c
+        logsmanagement/rrd_api/rrd_api_docker_ev.h
+        logsmanagement/rrd_api/rrd_api_generic.c
+        logsmanagement/rrd_api/rrd_api_generic.h
+        logsmanagement/rrd_api/rrd_api_kernel.c
+        logsmanagement/rrd_api/rrd_api_kernel.h
+        logsmanagement/rrd_api/rrd_api_mqtt.c
+        logsmanagement/rrd_api/rrd_api_mqtt.h
+        logsmanagement/rrd_api/rrd_api_stats.c
+        logsmanagement/rrd_api/rrd_api_stats.h
+        logsmanagement/rrd_api/rrd_api_systemd.c
+        logsmanagement/rrd_api/rrd_api_systemd.h
+        logsmanagement/rrd_api/rrd_api_web_log.c
+        logsmanagement/rrd_api/rrd_api_web_log.h
+        logsmanagement/rrd_api/rrd_api.h
+        logsmanagement/unit_test/unit_test.c
+        logsmanagement/unit_test/unit_test.h
+        logsmanagement/circular_buffer.c
+        logsmanagement/circular_buffer.h
+        logsmanagement/db_api.c
+        logsmanagement/db_api.h
+        logsmanagement/file_info.h
+        logsmanagement/flb_plugin.c
+        logsmanagement/flb_plugin.h
+        logsmanagement/functions.c
+        logsmanagement/functions.h
+        logsmanagement/helper.h
+        logsmanagement/defaults.h
+        logsmanagement/logsmanag_config.c
+        logsmanagement/logsmanag_config.h
+        logsmanagement/logsmanagement.c
+        logsmanagement/parser.c
+        logsmanagement/parser.h
+        logsmanagement/query.c
+        logsmanagement/query.h
+        )
+
 set(NETDATA_FILES
         collectors/all.h
         ${DAEMON_FILES}
@@ -1112,6 +1150,13 @@ add_definitions(
         -DVARLIB_DIR="/var/lib/netdata"
 )
 
+# -----------------------------------------------------------------------------
+# logs management
+
+IF(ENABLE_LOGSMANAGEMENT) 
+    list(APPEND NETDATA_FILES ${LOGSMANAGEMENT_FILES})
+ENDIF()
+
 # -----------------------------------------------------------------------------
 # kinesis exporting connector
 
@@ -1748,7 +1793,6 @@ endif()
 endif()
 endif()
 
-
 # generate config.h so that CMake becomes independent of automake
 
 ## netdata version

Makefile.am

@@ -114,6 +114,7 @@ SUBDIRS += \
     web \
     claim \
     spawn \
+    logsmanagement \
     $(NULL)
 
 AM_CFLAGS = \
@@ -349,6 +350,51 @@ LOG2JOURNAL_FILES = \
     libnetdata/log/log2journal.c \
     $(NULL)
 
+
+LOGSMANAGEMENT_FILES = \
+    logsmanagement/circular_buffer.c \
+    logsmanagement/circular_buffer.h \
+    logsmanagement/db_api.c \
+    logsmanagement/db_api.h \
+    logsmanagement/defaults.h \
+    logsmanagement/file_info.h \
+    logsmanagement/flb_plugin.c \
+    logsmanagement/flb_plugin.h \
+    logsmanagement/functions.c \
+    logsmanagement/functions.h \
+    logsmanagement/helper.h \
+    logsmanagement/logsmanag_config.c \
+    logsmanagement/logsmanag_config.h \
+    logsmanagement/logsmanagement.c \
+    logsmanagement/parser.c \
+    logsmanagement/parser.h \
+    logsmanagement/query.c \
+    logsmanagement/query.h \
+    logsmanagement/rrd_api/rrd_api_docker_ev.c \
+    logsmanagement/rrd_api/rrd_api_docker_ev.h \
+    logsmanagement/rrd_api/rrd_api_generic.c \
+    logsmanagement/rrd_api/rrd_api_generic.h \
+    logsmanagement/rrd_api/rrd_api_kernel.c \
+    logsmanagement/rrd_api/rrd_api_kernel.h \
+    logsmanagement/rrd_api/rrd_api_mqtt.c \
+    logsmanagement/rrd_api/rrd_api_mqtt.h \
+    logsmanagement/rrd_api/rrd_api_stats.c \
+    logsmanagement/rrd_api/rrd_api_stats.h \
+    logsmanagement/rrd_api/rrd_api_systemd.c \
+    logsmanagement/rrd_api/rrd_api_systemd.h \
+    logsmanagement/rrd_api/rrd_api_web_log.c \
+    logsmanagement/rrd_api/rrd_api_web_log.h \
+    logsmanagement/rrd_api/rrd_api.h \
+    database/sqlite/sqlite3.c \
+    database/sqlite/sqlite3.h \
+    $(LIBNETDATA_FILES) \
+    $(NULL)
+
+LOGSMANAGEMENT_TESTS_FILES = \
+    logsmanagement/unit_test/unit_test.c \
+    logsmanagement/unit_test/unit_test.h \
+    $(NULL)
+
 CUPS_PLUGIN_FILES = \
     collectors/cups.plugin/cups_plugin.c \
     $(LIBNETDATA_FILES) \
@@ -1342,6 +1388,17 @@ systemd_cat_native_LDADD = \
         $(NETDATA_COMMON_LIBS) \
         $(NULL)
 
+if ENABLE_LOGSMANAGEMENT
+    plugins_PROGRAMS += logs-management.plugin
+    logs_management_plugin_SOURCES = $(LOGSMANAGEMENT_FILES)
+if ENABLE_LOGSMANAGEMENT_TESTS
+    logs_management_plugin_SOURCES += $(LOGSMANAGEMENT_TESTS_FILES)
+endif
+    logs_management_plugin_LDADD = \
+        $(NETDATA_COMMON_LIBS) \
+        $(NULL)
+endif
+
 if ENABLE_PLUGIN_EBPF
     plugins_PROGRAMS += ebpf.plugin
     ebpf_plugin_SOURCES = $(EBPF_PLUGIN_FILES)

build_external/clean-install-arch-debug.Dockerfile

@@ -48,9 +48,10 @@ RUN find . -type f >/opt/netdata/manifest
 RUN CFLAGS="-Og -g -ggdb -Wall -Wextra -Wformat-signedness -DNETDATA_INTERNAL_CHECKS=1\
     -DNETDATA_VERIFY_LOCKS=1 ${EXTRA_CFLAGS}" ./netdata-installer.sh --require-cloud --disable-lto
 
-RUN ln -sf /dev/stdout /var/log/netdata/access.log
-RUN ln -sf /dev/stdout /var/log/netdata/debug.log
-RUN ln -sf /dev/stderr /var/log/netdata/error.log
+RUN ln -sf /dev/stdout /var/log/netdata/access.log && \
+    ln -sf /dev/stdout /var/log/netdata/debug.log && \
+    ln -sf /dev/stderr /var/log/netdata/error.log && \
+    ln -sf /dev/stdout /var/log/netdata/fluentbit.log
 
 RUN printf >/opt/netdata/source/gdb_batch '\
 set args -D \n\

build_external/clean-install-arch-extras.Dockerfile

@@ -48,9 +48,10 @@ RUN find . -type f >/opt/netdata/manifest
 RUN CFLAGS="-Og -g -ggdb -Wall -Wextra -Wformat-signedness -DNETDATA_INTERNAL_CHECKS=1\
     -DNETDATA_VERIFY_LOCKS=1 ${EXTRA_CFLAGS}" ./netdata-installer.sh --require-cloud --disable-lto
 
-RUN ln -sf /dev/stdout /var/log/netdata/access.log
-RUN ln -sf /dev/stdout /var/log/netdata/debug.log
-RUN ln -sf /dev/stderr /var/log/netdata/error.log
+RUN ln -sf /dev/stdout /var/log/netdata/access.log && \
+    ln -sf /dev/stdout /var/log/netdata/debug.log && \
+    ln -sf /dev/stderr /var/log/netdata/error.log && \
+    ln -sf /dev/stdout /var/log/netdata/fluentbit.log
 
 RUN rm /var/lib/netdata/registry/netdata.public.unique.id
 

build_external/clean-install-arch.Dockerfile

@@ -47,8 +47,9 @@ RUN find . -type f >/opt/netdata/manifest
 RUN CFLAGS="-O1 -ggdb -Wall -Wextra -Wformat-signedness -DNETDATA_INTERNAL_CHECKS=1\
     -DNETDATA_VERIFY_LOCKS=1 ${EXTRA_CFLAGS}" ./netdata-installer.sh --disable-lto
 
-RUN ln -sf /dev/stdout /var/log/netdata/access.log
-RUN ln -sf /dev/stdout /var/log/netdata/debug.log
-RUN ln -sf /dev/stderr /var/log/netdata/error.log
+RUN ln -sf /dev/stdout /var/log/netdata/access.log && \
+    ln -sf /dev/stdout /var/log/netdata/debug.log && \
+    ln -sf /dev/stderr /var/log/netdata/error.log && \
+    ln -sf /dev/stdout /var/log/netdata/fluentbit.log
 
 CMD ["/usr/sbin/netdata", "-D"]