Supported Format¶
- string
- glob
- regexp
- simple patterns
Syntax¶
Short Syntax <line> ::= [ <not> ] <format> <space> <expr> <not> ::= '!' negative expression <format> ::= [ '=', '~', '*' ] '=' means string match '~' means regexp match '*' means glob match <space> ::= { ' ' | '\t' | '\n' | '\n' | '\r' } <expr> ::= any string Long Syntax <line> ::= [ <not> ] <format> <separator> <expr> <format> ::= [ 'string' | 'glob' | 'regexp' | 'simple_patterns' ] <not> ::= '!' negative expression <separator> ::= ':' <expr> ::= any string
String matcher¶
The string matcher reports whether the given value equals to the string ( use == ).
Glob matcher¶
The glob matcher reports whether the given value matches the wildcard pattern.
The pattern syntax is:
pattern: { term } term: '*' matches any sequence of characters '?' matches any single character '[' [ '^' ] { character-range } ']' character class (must be non-empty) c matches character c (c != '*', '?', '\\', '[') '\\' c matches character c character-range: c matches character c (c != '\\', '-', ']') '\\' c matches character c lo '-' hi matches character c for lo <= c <= hi
Regexp matcher¶
The regexp matcher reports whether the given value matches the RegExp pattern ( use regexp.Match ).
The RegExp syntax is described at https://golang.org/pkg/regexp/syntax/.
Simple patterns matcher¶
The simple patterns matcher reports whether the given value matches the simple patterns.
The simple patterns is a custom format used in netdata, it’s syntax is described at https://docs.netdata.cloud/libnetdata/simple_pattern/.