add --grep option to parse logs stream output for match

[rveve]

No description provided.

[rveve]

Need a --grep or any generic program that can can parse output and find matches.

kubetail -l app=hello-node-w101-wave -n opsnondev -c hello-node --grep foo
Will tail 3 logs...
hello-node-w101-wave-7c6bb94cc5-2q79m
hello-node-w101-wave-7c6bb94cc5-s74lv
hello-node-w101-wave-7c6bb94cc5-thrxc
[hello-node-w101-wave-7c6bb94cc5-s74lv] Received request for URL: /foo/ 
[hello-node-w101-wave-7c6bb94cc5-s74lv] Received request for URL: /foo/ 
[hello-node-w101-wave-7c6bb94cc5-s74lv] Received request for URL: /foo/ 
[hello-node-w101-wave-7c6bb94cc5-s74lv] Received request for URL: /foo/ 
[hello-node-w101-wave-7c6bb94cc5-s74lv] Received request for URL: /foo/ 

kubetail -l app=api-service-dev -n core -c api-service --grep '\-i error' --jq '.logger_name'
Will tail 21 logs...
api-service-dev-758b4f86dc-4x76g
api-service-dev-758b4f86dc-6kkxv
api-service-dev-758b4f86dc-7fpmf
api-service-dev-758b4f86dc-9mpqs
api-service-dev-758b4f86dc-b58gx
api-service-dev-758b4f86dc-c9pqs
api-service-dev-758b4f86dc-ccbhk
api-service-dev-758b4f86dc-gtggb
api-service-dev-758b4f86dc-kb8bm
api-service-dev-758b4f86dc-kdg74
api-service-dev-758b4f86dc-l8wgz
api-service-dev-758b4f86dc-nf447
api-service-dev-758b4f86dc-njx4x
api-service-dev-758b4f86dc-pjn6g
api-service-dev-758b4f86dc-rgw4h
api-service-dev-758b4f86dc-rzlgl
api-service-dev-758b4f86dc-whhq9
api-service-dev-758b4f86dc-wn4lz
api-service-dev-758b4f86dc-wvjb2
api-service-dev-758b4f86dc-x6j6r
api-service-dev-758b4f86dc-xn87x
[api-service-dev-758b4f86dc-6kkxv] controllers.ProgramSettingsController 
[api-service-dev-758b4f86dc-pjn6g] controllers.ProgramSettingsController 
[api-service-dev-758b4f86dc-x6j6r] controllers.ProgramSettingsController 
[api-service-dev-758b4f86dc-b58gx] controllers.ProgramSettingsController 
[api-service-dev-758b4f86dc-xn87x] controllers.ProgramSettingsController 
[api-service-dev-758b4f86dc-6kkxv] controllers.ProgramSettingsController 
[api-service-dev-758b4f86dc-kdg74] controllers.ProgramSettingsController 
[api-service-dev-758b4f86dc-xn87x] controllers.ProgramSettingsController 
[api-service-dev-758b4f86dc-kb8bm] controllers.ProgramSettingsController 

[mreza-kiani]

Please accept this merge! It's really useful

[johanhaleby]

Please explain why you just can't pipe to grep? For example:

kubetail my-pod | grep hello

This seems to work well for me on Mac and a colleague is using it fine on Linux too.

[mreza-kiani]

Yes, now I get it works correctly for me too. Because kubetail stats from the end of the current log, I couldn't receive any log when I used | grep pipe due to rare occurrence of the event. So it was my fault, and I'm sorry about it.
Thanks for your respond