Exclude name-XXX-YY

[patsevanton]

Hello! Awasome application!
I try exclude this log

js-agent-mongodb-7949d5c4f6-98lzr mongodb {"t":{"$date":"2021-07-16T12:58:39.391+00:00"},"s":"I",  "c":"NETWORK",  "id":22944,   "ctx":"conn102","msg":"Connection ended","attr":{"remote":"127.0.0.1:33104","connectionId":102,"connectionCount":1}}

I use

stern --exclude 'js-agent-mongodb*' .

But log dont hidden. How exclude name-XXX-YY ?
Thanks!

[rkmathi]

I confirmed with a simple application.

'use strict';

const express = require('express');

const PORT = 8080;
const HOST = '0.0.0.0';

const app = express();
app.get('/', (req, res) => {
  console.log(`request from ${req.headers.host}`);
  console.log('js-agent-mongodb-7949d5c4f6-98lzr mongodb {"t":{"$date":"2021-07-16T12:58:39.391+00:00"},"s":"I",  "c":"NETWORK",  "id":22944,   "ctx":"conn102","msg":"Connection ended","attr":{"remote":"127.0.0.1:33104","connectionId":102,"connectionCount":1}}')
  res.send('Hello World');
});

app.listen(PORT, HOST);
console.log(`Running on http://${HOST}:${PORT}`);

But I could filter it.

# without --exclude option
$ ~/tmp/stern_1.19.0_linux_amd64/stern nodeapp-b
+ nodeapp-bf5dfc49f-mxjww › nodeapp
nodeapp-bf5dfc49f-mxjww nodeapp Running on http://0.0.0.0:8080
nodeapp-bf5dfc49f-mxjww nodeapp request from node0:31000
nodeapp-bf5dfc49f-mxjww nodeapp js-agent-mongodb-7949d5c4f6-98lzr mongodb {"t":{"$date":"2021-07-16T12:58:39.391+00:00"},"s":"I",  "c":"NETWORK",  "id":22944,   "ctx":"conn102","msg":"Connection ended","attr":{"remote":"127.0.0.1:33104","connectionId":102,"connectionCount":1}}
^C

# with --exclude option
$ ~/tmp/stern_1.19.0_linux_amd64/stern --exclude 'js-agent-mongodb*' nodeapp-b
+ nodeapp-bf5dfc49f-mxjww › nodeapp
nodeapp-bf5dfc49f-mxjww nodeapp Running on http://0.0.0.0:8080
nodeapp-bf5dfc49f-mxjww nodeapp request from node0:31000
^C

This is reproduced in WSL2(Ubuntu 20.04) + Zsh + stern 1.19.0.

Which version and environment are you using?

[patsevanton]

Hi all. Any news?

[superbrothers]

stern provides three exclusion ways, as follows

$ stern -h | grep -- --exclude
  -e, --exclude strings            Log lines to exclude. (regular expression)
  -E, --exclude-container string   Container name to exclude when multiple containers in pod. (regular expression)
      --exclude-pod string         Pod name to exclude. (regular expression)

$ stern --version
version: 1.20.0
commit: 0f9402d4c7c11f343dab140e7461817e21f3a9e8
built at: 2021-08-13T01:32:22Z

--exclude is for log messages. If you want to target pod names, you can use --exclude-pod.

$ stern --exclude-pod js-agent-mongodb .

[patsevanton]

Great. Thanks!

[patsevanton]

How exclude line contain "GET / HTTP/1.1" 200 ?
Example

drill-admin-ui-7f89cf7789-bdn5d admin-ui 10.1.82.1 - - [07/Sep/2021:12:53:44 +0000] "GET / HTTP/1.1" 200 1074 "-" "kube-probe/1.18"

Run

stern --exclude '\"GET / HTTP/1.1\" 200' .
Error: invalid argument "\\\"GET / HTTP/1.1\\\" 200" for "-e, --exclude" flag: parse error on line 1, column 1: bare " in non-quoted-field

Work

stern -n drill --exclude-pod js-agent-mongodb --exclude-pod js-agent --exclude "GET / HTTP/1.1" .

But exluce HTTP CODE 200 and 500.

[superbrothers]

I first noticed this problem. Please do the following:

stern . --exclude '"""GET / HTTP/1.1"" 200"'

This seems to be a problem with StringSlice in spf13/pflag; if quote is present, it follows CSV rules.

• https://pkg.go.dev/github.com/spf13/pflag#StringSlice
• https://github.com/spf13/pflag/blob/v1.0.5/string_slice.go#L22-L29
• https://pkg.go.dev/encoding/csv

I treat this as a specification.

[floryut]

Nice I was answering the same things but finding this freaking weird, good job @superbrothers