regex101: kube_log

^start of line

\D{8}any character that's not a digit, repeated exactly 8 times

Group severity(?<severity>\w)

\wany word character

Group time(?<time>\d{4}\s[^\s]*)

\d{4}a digit, repeated exactly 4 times

\sany whitespace character

Negated Character Class[^\s]*

*matches any number of characters outside the set below:

\sany whitespace character

\s+any whitespace character, repeated at least once

Group pid(?<pid>\d+)

\d+a digit, repeated at least once

\s+any whitespace character, repeated at least once

Group source(?<source>[^ \]]+)

Negated Character Class[^ \]]+

+matches at least one character outside the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Group message(?<message>.*[/\/n])

.*any character (except for line terminators), repeated any number of times

Character Class[/\/n]

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

nthe literal n (110₁₀ / 156₈ / 6E₁₆) (case sensitive)

Group 6([\W]*[\w]*){3}

{3}repeats the group contents below exactly 3 times:

Character Class[\W]*

*matches any number of characters from the set below:

\Wany non-word character

Character Class[\w]*

*matches any number of characters from the set below:

\wany word character

Character Class[\W]{3}

{3}matches exactly 3 characters from the set below:

\Wany non-word character

Group logdate(?<logdate>[\d]*\-[\d]*\-[\d]*)

Character Class[\d]*

*matches any number of characters from the set below:

\da digit

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[\d]*

*matches any number of characters from the set below:

\da digit

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[\d]*

*matches any number of characters from the set below:

\da digit

\wany word character

Group logtime(?<logtime>[\d]*\:[\d]*\:[\d]*\.[\d]*)

Character Class[\d]*

*matches any number of characters from the set below:

\da digit

\:the literal : (58₁₀ / 72₈ / 3A₁₆)

Character Class[\d]*

*matches any number of characters from the set below:

\da digit

\:the literal : (58₁₀ / 72₈ / 3A₁₆)

Character Class[\d]*

*matches any number of characters from the set below:

\da digit

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[\d]*

*matches any number of characters from the set below:

\da digit

\wany word character

\W*any non-word character, repeated any number of times

$end of line

Global pattern flags

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

g modifier: global. Finds all matches instead of stopping after the first

Search reference

Regular Expression

^\D{8}(?<severity>\w)(?<time>\d{4}\s[^\s]*)\s+(?<pid>\d+)\s+(?<source>[^ \]]+)\](?<message>.*[/\/n])([\W]*[\w]*){3}[\W]{3}(?<logdate>[\d]*\-[\d]*\-[\d]*)\w(?<logtime>[\d]*\:[\d]*\:[\d]*\.[\d]*)\w\W*$

Unit Tests

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