47 lines
1.5 KiB
Markdown
47 lines
1.5 KiB
Markdown
# Regex Processor Plugin
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The `regex` plugin transforms tag and field values with regex pattern. If `result_key` parameter is present, it can produce new tags and fields from existing ones.
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### Configuration:
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```toml
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[[processors.regex]]
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namepass = ["nginx_requests"]
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# Tag and field conversions defined in a separate sub-tables
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[[processors.regex.tags]]
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## Tag to change
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key = "resp_code"
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## Regular expression to match on a tag value
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pattern = "^(\\d)\\d\\d$"
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## Pattern for constructing a new value (${1} represents first subgroup)
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replacement = "${1}xx"
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[[processors.regex.fields]]
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key = "request"
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## All the power of the Go regular expressions available here
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## For example, named subgroups
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pattern = "^/api(?P<method>/[\\w/]+)\\S*"
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replacement = "${method}"
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## If result_key is present, a new field will be created
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## instead of changing existing field
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result_key = "method"
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# Multiple conversions may be applied for one field sequentially
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# Let's extract one more value
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[[processors.regex.fields]]
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key = "request"
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pattern = ".*category=(\\w+).*"
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replacement = "${1}"
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result_key = "search_category"
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```
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### Tags:
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No tags are applied by this processor.
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### Example Output:
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```
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nginx_requests,verb=GET,resp_code=2xx request="/api/search/?category=plugins&q=regex&sort=asc",method="/search/",search_category="plugins",referrer="-",ident="-",http_version=1.1,agent="UserAgent",client_ip="127.0.0.1",auth="-",resp_bytes=270i 1519652321000000000
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```
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