Use journald for system module on Debian 12 #41061

belimawr · 2024-10-01T11:56:13Z

Proposed commit message

This commit adds Debian 12 support to our system module, to support
Debian 12 we need to use the journald input to collect the system
logs.

To support it, a new, internal, input system-logsis introduced, it is responsible
for deciding whether the log input or journald must be used. If var.paths is defined
in the module configuration, system-logs looks at the files, if any of the globs resolves
to one or more files the log input is used, otherwise the jouranld input is used.

This behaviour can be overridden by setting var.use_journald or var.use_files,
which will force the use of journald or files.

Other changes:

Journald input now support filtering by facilities
System tests for modules now support handling journal files
The TESTING_FILEBEAT_FILEPATTERN environment variable now is a
comma separated list of globs, it defaults to .log,*.journal
Multiple lint warnings are fixed
The documentation has been updated where needed.

Checklist

My code follows the style guidelines of this project
I have commented my code, particularly in hard-to-understand areas
I have made corresponding changes to the documentation
I have made corresponding change to the default configuration files
I have added tests that prove my fix is effective or that my feature works
I have added an entry in CHANGELOG.next.asciidoc or CHANGELOG-developer.next.asciidoc.

Disruptive User Impact

Debian 12 is now supported by Filebeat's system module
On Debian 12 the system module will use the journald input
The ingest pipelines for the system module were modified from 1 per fileset to 3
The journald input currently only reads logs from the current boot

~~## Author's Checklist~~

How to test this PR locally

Run the tests

mage buildSystemTestBinary
mage docker:ComposeUp
source $(mage PythonVirtualEnv)/bin/activate
INTEGRATION_TESTS=1 BEAT_STRICT_PERMS=false ES_PASS=testing ES_USER=admin TESTING_FILEBEAT_MODULES=system pytest tests/system/test_modules.py

Run the system module

Package Filebeat from this PR.
Start the Debian 12 VM, run Filebeat

vagrant up debian12
vagrant ssh debian12
cp /vagrant/filebeat/build/distributions/filebeat-oss-9.0.0-SNAPSHOT-linux-x86_64.tar.gz ./
tar -xf filebeat-oss-9.0.0-SNAPSHOT-linux-x86_64.tar.gz 
cd filebeat-9.0.0-SNAPSHOT-linux-x86_64/
./filebeat modules enable system
./filebeat setup -e -v
# edit modules.d/system.yml and enable both filesets
# edit filebeat.yml and add the ES output and Kibana URL/credentials
./filebeat -e -v

Ensure data is ingested (datastream filebeat-9.0.0)

Related issues

Closes Investigate the best way to decide when to read system logs from files or journald #40526

~~## Use cases~~
~~## Screenshots~~
~~## Logs~~

mergify · 2024-10-01T11:56:47Z

This pull request does not have a backport label.
If this is a bug or security fix, could you label this PR @belimawr? 🙏.
For such, you'll need to label your PR with:

The upcoming major version of the Elastic Stack
The upcoming minor version of the Elastic Stack (if you're not pushing a breaking change)

To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

backport-8./d is the label to automatically backport to the 8./d branch. /d is the digit

mergify · 2024-10-01T11:56:48Z

backport-8.x has been added to help with the transition to the new branch 8.x.
If you don't need it please use backport-skip label and remove the backport-8.x label.

belimawr · 2024-10-02T12:55:30Z

buildkite test this

mergify · 2024-10-02T14:49:35Z

This pull request is now in conflicts. Could you fix it? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b 40526-system-integration-journald upstream/40526-system-integration-journald
git merge upstream/main
git push upstream 40526-system-integration-journald

mergify · 2024-10-03T08:25:36Z

This pull request is now in conflicts. Could you fix it? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b 40526-system-integration-journald upstream/40526-system-integration-journald
git merge upstream/main
git push upstream 40526-system-integration-journald

elasticmachine · 2024-10-04T13:15:32Z

Pinging @elastic/elastic-agent-data-plane (Team:Elastic-Agent-Data-Plane)

filebeat/module/system/auth/config/auth.yml

pierrehilbert · 2024-10-11T07:12:53Z

/test

belimawr · 2024-10-11T14:19:59Z

/test

I have the skip-ci tag on it, it's not meant to run the CI tests yet. I'm just pushing some commits to share the progress on this task. I was talking with Julien yesterday and he mentioned he hadn't see any changes in the PR for a while, so I pushed the commits I had made in the past few days, but were not ready to run CI yet.

leehinman

Looking good. Couple small things below.

Any chance we can get a "real" integration test? Even if it just tests that the auto detect "detects" files on a non debian 12 system?

leehinman · 2024-10-11T14:32:20Z

filebeat/module/system/auth/ingest/journald.yml

+  - grok:
+      description: Grok specific auth messages.
+      tag: grok-specific-messages
+      field: message
+      ignore_missing: true
+      patterns:
+        - '^%{DATA:system.auth.ssh.event} %{DATA:system.auth.ssh.method} for (invalid user)?%{DATA:user.name} from %{IPORHOST:source.address} port %{NUMBER:source.port:long} ssh2(: %{GREEDYDATA:system.auth.ssh.signature})?'
+        - '^%{DATA:system.auth.ssh.event} user %{DATA:user.name} from %{IPORHOST:source.address}'
+        - '^Did not receive identification string from %{IPORHOST:system.auth.ssh.dropped_ip}'
+        - '^%{DATA:user.name} :( %{DATA:system.auth.sudo.error} ;)? TTY=%{DATA:system.auth.sudo.tty} ; PWD=%{DATA:system.auth.sudo.pwd} ; USER=%{DATA:system.auth.sudo.user} ; COMMAND=%{GREEDYDATA:system.auth.sudo.command}'
+        - '^new group: name=%{DATA:group.name}, GID=%{NUMBER:group.id}'
+        - '^new user: name=%{DATA:user.name}, UID=%{NUMBER:user.id}, GID=%{NUMBER:group.id}, home=%{DATA:system.auth.useradd.home}, shell=%{DATA:system.auth.useradd.shell}$'
+      ignore_failure: true


I'm pretty sure this is a duplicate of what was in pipeline.yml which is now renamed to files.yml. The grok patterns are hard enough to maintain, we don't want to have to remember to do it in 2 places. Can you move the duplicates into a separate pipeline that both call?

I managed to move it to a separated pipeline: 9f57ea8

filebeat/tests/system/test_modules.py

belimawr · 2024-10-14T12:34:14Z

/test

belimawr · 2024-10-14T12:36:52Z

The failing tests seem to be flaky tests, I created issues for them:

This commit adds Debian 12 support to our system module, to support Debian 12 we need to use the journald input to collect the system logs. To support it, a new, internal, input `system-logs`is introduced, it is responsible for deciding whether the log input or journald must be used. If `var.paths` is defined in the module configuration, `system-logs` looks at the files, if any of the globs resolves to one or more files the `log` input is used, otherwise the `jouranld` input is used. This behaviour can be overridden by setting `var.use_journald` or `var.use_files`, which will force the use of journald or files. Other changes: - Journald input now support filtering by facilities - System tests for modules now support handling journal files - The `TESTING_FILEBEAT_FILEPATTERN` environment variable now is a comma separated list of globs, it defaults to `.log,*.journal` - Multiple lint warnings are fixed - The documentation has been updated where needed. (cherry picked from commit cfd1f1c)

This commit adds Debian 12 support to our system module, to support Debian 12 we need to use the journald input to collect the system logs. To support it, a new, internal, input `system-logs`is introduced, it is responsible for deciding whether the log input or journald must be used. If `var.paths` is defined in the module configuration, `system-logs` looks at the files, if any of the globs resolves to one or more files the `log` input is used, otherwise the `jouranld` input is used. This behaviour can be overridden by setting `var.use_journald` or `var.use_files`, which will force the use of journald or files. Other changes: - Journald input now support filtering by facilities - System tests for modules now support handling journal files - The `TESTING_FILEBEAT_FILEPATTERN` environment variable now is a comma separated list of globs, it defaults to `.log,*.journal` - Multiple lint warnings are fixed - The documentation has been updated where needed. (cherry picked from commit cfd1f1c) Co-authored-by: Tiago Queiroz <[email protected]>

filebeat/input/systemlogs/input.go

filebeat/module/system/syslog/test/darwin-syslog-sample.log-expected.json

cmacknz · 2024-10-15T17:04:03Z

filebeat/input/systemlogs/input.go

+
+// newV1Input checks whether the log input must be created and
+// delegates to loginput.NewInput if needed.
+func newV1Input(


Does this input not have tests, or am I just missing where they are?

It has integration tests, the python system tests.

But I can write some unit/integration (integration in the sense they will rely on journalclt existing on the host) if you prefer.

I would prefer if there were tests that lived with the input, right now they live with the system module which is quite far away from the input. In a year from now someone reading this may have trouble spotting them.

What I see now is this configuration in the system module tests:

if ".journal" in test_file: cmd.remove("-once") cmd.append("-M") cmd.append("{module}.{fileset}.var.use_journald=true".format( module=module, fileset=fileset)) cmd.append("-M") cmd.append("{module}.{fileset}.input.journald.paths=[{test_file}]".format( module=module, fileset=fileset, test_file=test_file)) else: cmd.append("-M") cmd.append("{module}.{fileset}.var.paths=[{test_file}]".format( module=module, fileset=fileset, test_file=test_file))

This tests the use_journald configuration and also the case where paths exists. These are not exhaustive tests :)

I don't see a test for the case where there is a list of file paths, but the paths don't exist in the file system, so we read from journald. This is the most common case we expect to for this to handle.

I'll add some tests for this case on a new PR.

I created a GH issue to help keep track of it: #41259

belimawr added the skip-ci Skip the build in the CI but linting label Oct 1, 2024

botelastic bot added the needs_team Indicates that the issue/PR needs a Team:* label label Oct 1, 2024

mergify bot assigned belimawr Oct 1, 2024

mergify bot added the backport-8.x Automated backport to the 8.x branch with mergify label Oct 1, 2024

belimawr added Team:Elastic-Agent-Data-Plane Label for the Agent Data Plane team and removed skip-ci Skip the build in the CI but linting labels Oct 1, 2024

botelastic bot removed the needs_team Indicates that the issue/PR needs a Team:* label label Oct 1, 2024

belimawr changed the title ~~[WIP] Add Journald support to system module~~ Add Journald support to system module Oct 2, 2024

belimawr changed the title ~~Add Journald support to system module~~ Use journald for system module on Debian 12 Oct 2, 2024

belimawr force-pushed the 40526-system-integration-journald branch from bebe599 to 07582e4 Compare October 2, 2024 19:57

belimawr marked this pull request as ready for review October 4, 2024 13:15

belimawr requested a review from a team as a code owner October 4, 2024 13:15

belimawr requested review from khushijain21 and VihasMakwana October 4, 2024 13:15

leehinman reviewed Oct 4, 2024

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pierrehilbert requested review from rdner and faec and removed request for khushijain21 and VihasMakwana October 4, 2024 15:04

belimawr force-pushed the 40526-system-integration-journald branch from a0a9e61 to 1df05cc Compare October 10, 2024 14:01

belimawr added the skip-ci Skip the build in the CI but linting label Oct 10, 2024

leehinman requested changes Oct 11, 2024

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belimawr added 5 commits October 11, 2024 15:07

Update golden files

3328fce

Update golden files to new input type

648200d

set input type back to the old config

2bafcf0

Remove un-used code and small updates

11e6655

move grok step to a separated pipeline

fbfdbbe

belimawr force-pushed the 40526-system-integration-journald branch from 9f57ea8 to fbfdbbe Compare October 11, 2024 19:08

Add build constraints to support non-linux systems

ea2e833

belimawr requested a review from leehinman October 14, 2024 12:34

belimawr mentioned this pull request Oct 14, 2024

Reduce ingest pipeline duplication in Filebeat's system module #41226

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leehinman approved these changes Oct 14, 2024

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belimawr merged commit cfd1f1c into elastic:main Oct 14, 2024
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belimawr deleted the 40526-system-integration-journald branch October 14, 2024 16:24

mergify bot mentioned this pull request Oct 14, 2024

[8.x](backport #41061) Use journald for system module on Debian 12 #41227

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belimawr mentioned this pull request Oct 14, 2024

De-duplicate pipeline steps in system.auth module #41229

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mergify bot mentioned this pull request Oct 14, 2024

[8.x](backport #41229) De-duplicate pipeline steps in system.auth module #41231

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cmacknz reviewed Oct 15, 2024

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belimawr mentioned this pull request Oct 17, 2024

system-logs input ignores folders and add tests #41296

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This was referenced Oct 22, 2024

[8.16](backport #41296) system-logs input ignores folders and add tests #41382

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[8.x](backport #41296) system-logs input ignores folders and add tests #41383

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belimawr mentioned this pull request Oct 30, 2024

Revert system module support for journald #41489

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[main](backport #41489) Revert system module support for journald #41490

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[8.x](backport #41489) Revert system module support for journald #41491

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Use journald for system module on Debian 12 #41061

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Use journald for system module on Debian 12 #41061

Use journald for system module on Debian 12 #41061

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Proposed commit message

Checklist

Disruptive User Impact

How to test this PR locally

Run the tests

Run the system module

Related issues

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