I'm using filebeat to watch log files, how can I construct a regular expression for files with the following extensions: .log, .log.1, .log.2. It also should ignore all other extensions such as .json or .gz. Thanks.

CodePudding user response：

You could go with something like this (the parenthesis are used for grouping):

(. )(\.log)(\.\d )?

I always use this site to try out and work on regular expressions. You can insert the matching texts and visually see what matches. Hope this helps.

CodePudding user response：

Try this (.)*(\.log|\log1|\log2){1} There's a great online regex tool to help you doodle with various regexes at rubular.com