output: add nats streaming stan output

[cpanato]

What type of PR is this?
/kind feature

Any specific area of the project related to this PR?
/area outputs

What this PR does / why we need it:
Add nats streaming stan to the outputs

we can refactor both nats/stan maybe later if needed.

tested with a nats/stan server

• created a kind cluster
• deployed the nats/stan using the guide: https://docs.nats.io/nats-on-kubernetes/minimal-setup

then:

sending a falco sample message:

falcosidekick logs:

2020/12/09 12:49:35 [INFO]  : Enabled Outputs : STAN
2020/12/09 12:49:35 [INFO]  : Falco Sidekick is up and listening on port 2801
2020/12/09 12:49:35 [INFO]  : Debug mode : true
2020/12/09 13:02:55 [DEBUG] : Falco's payload : {"output":"This is a test from falcosidekick","priority":"Debug","rule":"Test rule","time":"2020-12-09T12:02:55Z","output_fields":null}
2020/12/09 13:02:55 [INFO]  : STAN - Publish OK
2020/12/09 13:02:56 [DEBUG] : Falco's payload : {"output":"This is a test from falcosidekick","priority":"Debug","rule":"Test rule","time":"2020-12-09T12:02:56Z","output_fields":null}
2020/12/09 13:02:57 [INFO]  : STAN - Publish OK

created a consumer app to read:

./stan-nats

Received a message: {"output":"This is a test from falcosidekick","priority":"Debug","rule":"Test rule","time":"2020-12-09T12:03:02Z","output_fields":null}

Which issue(s) this PR fixes:

None

Special notes for your reviewer:

/assign @Issif

[poiana]

@cpanato: The label(s) area/outputs cannot be applied, because the repository doesn't have them

In response to this:

What type of PR is this?
/kind feature

Any specific area of the project related to this PR?
/area outputs

What this PR does / why we need it:
Add nats streaming stan to the outputs

we can refactor both nats/stan maybe later if needed.

tested with a nats/stan server

• created a kind cluster
• deployed the nats/stan using the guide: https://docs.nats.io/nats-on-kubernetes/minimal-setup

then:

sending a falco sample message:

falcosidekick logs:

2020/12/09 12:49:35 [INFO]  : Enabled Outputs : STAN
2020/12/09 12:49:35 [INFO]  : Falco Sidekick is up and listening on port 2801
2020/12/09 12:49:35 [INFO]  : Debug mode : true
2020/12/09 13:02:55 [DEBUG] : Falco's payload : {"output":"This is a test from falcosidekick","priority":"Debug","rule":"Test rule","time":"2020-12-09T12:02:55Z","output_fields":null}
2020/12/09 13:02:55 [>>>>>>>] : STAN - stan / hello / nats://localhost:4222
2020/12/09 13:02:55 [INFO]  : STAN - Publish OK
2020/12/09 13:02:56 [DEBUG] : Falco's payload : {"output":"This is a test from falcosidekick","priority":"Debug","rule":"Test rule","time":"2020-12-09T12:02:56Z","output_fields":null}
2020/12/09 13:02:56 [>>>>>>>] : STAN - stan / hello / nats://localhost:4222
2020/12/09 13:02:57 [INFO]  : STAN - Publish OK

created a consumer app to read:

./stan-nats

Received a message: {"output":"This is a test from falcosidekick","priority":"Debug","rule":"Test rule","time":"2020-12-09T12:03:02Z","output_fields":null}

Which issue(s) this PR fixes:

None

Special notes for your reviewer:

/assign @Issif

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[cpanato]

/hold for some manual tests with multiple sidekicks

[Issif]

👍

[poiana]

LGTM label has been added.

Git tree hash: f2e9b42c5dd5ec631ac19329a659d5d8a6f98a3c

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Issif

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[cpanato]

/hold cancel

tests done using both config file and env vars