Fix fluent-bit newline and tab characters #2286
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cmd/fluent-bit/loki.go
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| func replaceNewLineAndTab(line string) string{ | ||
| replacer := strings.NewReplacer(`\n`, "\n", `\t`, "\t") | ||
| return replacer.Replace(line) | ||
| } | ||
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This is a hacky solution. Somewhere the encoding by Json and logfmt is treating \n and \t as escaped. So, we have to replace those with actual \n and \t.
Any better ways?
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well I guess the replacer can be global for sure.
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And so you probably don't need this function.
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Yeah looks like a fine solution to me. Basically unescaping those characters.
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Have you tried to see what fluentd send for those ? I'm curious to see if they do the same.
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Fluent-bit records are fine. I just checked the content before Marshaling the record here
Line 203 in 7399bef
\n and \t looks fine here.
But after the marshaling, result from jsoniter.ConfigCompatibleWithStandardLibrary.Marshal(records) doesn't respect \n and \t. Looks like Marshaling is escaping these characters.
Same applies to logfmt encoding as well
Line 217 in 7399bef
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Which is correct everything is enclosed by "" and \ must be escaped. May be this is more a Grafana issue ? when reading \\n it should read\n ? cc @aocenas WDYT ?
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Yeah, this can be handled from Grafana side as well. However, line would be this Hello\nworld and not Hello\\nworld. So, on Grafana they can replace \n with actual newline.
adityacs
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Codecov Report
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## master #2286 +/- ##
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- Coverage 62.45% 62.45% -0.01%
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Files 158 158
Lines 12762 12761 -1
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- Hits 7971 7970 -1
Misses 4177 4177
Partials 614 614
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cmd/fluent-bit/loki.go
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| @@ -115,12 +118,13 @@ func autoLabels(records map[string]interface{}, kuberneteslbs model.LabelSet) er | |||
| return errors.New("kubernetes labels not found, no labels will be added") | |||
| } | |||
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| replacer := strings.NewReplacer("/", "_", ".", "_", "-", "_") | |||
| keyReplacer := strings.NewReplacer("/", "_", ".", "_", "-", "_") | |||
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that could be global too while we are at it.
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Yeah initially made that global but we will get this error https://cloud.drone.io/grafana/loki/3437/1/2.
If the line contains . or / that would be replaced as well. So, just kept it local
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not sure what you mean moving this to a new global variable, should be fine ?
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For example if the log message has 12.2 foo bar as value, doing replace with this global replacer
strings.NewReplacer("/", "_", ".", "_", "-", "_", `\n`,, "\n", `\t`, "\t")
will make the log message as 12_2 foo bar which is not desired.
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that is not what I was really asking to use a single replace, but two globals, one for key one for line.
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you mean we can have 2 separate global variables?
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Hi guys, we're running into the same issue. Can you please help to understand at what version this fix included? We use grafana 8.3.3, loki 2.3.0 and fluent bit 1.8.11 |
What this PR does / why we need it:
Fixes fluent-bit newline and tab characters
Which issue(s) this PR fixes:
Fixes #2246