mirror of
https://github.com/kubernetes-sigs/prometheus-adapter.git
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40a9ee2474
This moves the DefaultConfig method out into a helper to generate legacy configuration. Passing in a config file is now required.
75 lines
3.4 KiB
Go
75 lines
3.4 KiB
Go
package config
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type MetricsDiscoveryConfig struct {
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// Rules specifies how to discover and map Prometheus metrics to
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// custom metrics API resources. The rules are applied independently,
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// and thus must be mutually exclusive. Rules will the same SeriesQuery
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// will make only a single API call.
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Rules []DiscoveryRule `yaml:"rules"`
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}
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// DiscoveryRule describes on set of rules for transforming Prometheus metrics to/from
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// custom metrics API resources.
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type DiscoveryRule struct {
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// SeriesQuery specifies which metrics this rule should consider via a Prometheus query
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// series selector query.
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SeriesQuery string `yaml:"seriesQuery"`
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// SeriesFilters specifies additional regular expressions to be applied on
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// the series names returned from the query. This is useful for constraints
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// that can't be represented in the SeriesQuery (e.g. series matching `container_.+`
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// not matching `container_.+_total`. A filter will be automatically appended to
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// match the form specified in Name.
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SeriesFilters []RegexFilter `yaml:"seriesFilters"`
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// Resources specifies how associated Kubernetes resources should be discovered for
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// the given metrics.
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Resources ResourceMapping `yaml:"resources"`
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// Name specifies how the metric name should be transformed between custom metric
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// API resources, and Prometheus metric names.
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Name NameMapping `yaml:"name"`
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// MetricsQuery specifies modifications to the metrics query, such as converting
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// cumulative metrics to rate metrics. It is a template where `.LabelMatchers` is
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// a the comma-separated base label matchers and `.Series` is the series name, and
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// `.GroupBy` is the comma-separated expected group-by label names. The delimeters
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// are `<<` and `>>`.
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MetricsQuery string `yaml:"metricsQuery,omitempty"`
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}
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// RegexFilter is a filter that matches positively or negatively against a regex.
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// Only one field may be set at a time.
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type RegexFilter struct {
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Is string `yaml:"is,omitempty"`
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IsNot string `yaml:"isNot,omitempty"`
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}
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// ResourceMapping specifies how to map Kubernetes resources to Prometheus labels
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type ResourceMapping struct {
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// Template specifies a golang string template for converting a Kubernetes
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// group-resource to a Prometheus label. The template object contains
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// the `.Group` and `.Resource` fields. The `.Group` field will have
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// dots replaced with underscores, and the `.Resource` field will be
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// singularized. The delimiters are `<<` and `>>`.
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Template string `yaml:"template,omitempty"`
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// Overrides specifies exceptions to the above template, mapping label names
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// to group-resources
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Overrides map[string]GroupResource `yaml:"overrides,omitempty"`
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}
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// GroupResource represents a Kubernetes group-resource.
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type GroupResource struct {
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Group string `yaml:"group,omitempty"`
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Resource string `yaml:"resource"`
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}
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// NameMapping specifies how to convert Prometheus metrics
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// to/from custom metrics API resources.
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type NameMapping struct {
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// Matches is a regular expression that is used to match
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// Prometheus series names. It may be left blank, in which
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// case it is equivalent to `.*`.
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Matches string `yaml:"matches"`
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// As is the name used in the API. Captures from Matches
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// are available for use here. If not specified, it defaults
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// to $0 if no capture groups are present in Matches, or $1
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// if only one is present, and will error if multiple are.
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As string `yaml:"as"`
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}
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