seastar::metrics::relabel_config Struct Reference

Detailed Description

a relabel_config allows changing metrics labels dynamically

The logic is similar to Prometheus configuration This is how Prometheus entry looks like:

• source_labels: [version] regex: '([0-9]+.[0-9]+)(.?[0-9]*).*' replacement: '$1$2' target_label: svr relabel_action values: skip_when_empty - when set supported metrics (histogram, summary and counters) will not be reported if they were never used. report_when_empty - revert the skip_when_empty flag replace - replace the value of the target_label keep - enable the metrics drop - disable the metrics drop_label - remove the target label

source_labels - a list of source labels, the labels are concatenated with the separator and and the combine value is match to the regex. target_label - the labels to perform the action on when replacing a value or when dropping a label. replacement - the string to use when replacing a label value, regex group can be used. expr - a regular expression in a string format. Action would be taken if the regex match the concatenated labels. action - The action to perform when there is a match. separator - separator to use when concatenating the labels.

#include <seastar/core/relabel_config.hh>

Public Types
enum class	relabel_action {   skip_when_empty , report_when_empty , replace , keep ,   drop , drop_label }

Public Attributes
std::vector< std::string >	source_labels
std::string	target_label
std::string	replacement = "${1}"
relabel_config_regex	expr = "(.*)"
relabel_action	action = relabel_action::replace
std::string	separator = ";"

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The documentation for this struct was generated from the following file:

• seastar/core/relabel_config.hh