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https://github.com/kubernetes-sigs/prometheus-adapter.git
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af9f11c817
This commit introduces advanced configuration. The rate-interval and label-prefix flags are removed, and replaced by a configuration file that allows you to specify series queries and the rules for transforming those into metrics queries and API resources.
69 lines
3.4 KiB
YAML
69 lines
3.4 KiB
YAML
rules:
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# Each rule represents a some naming and discovery logic.
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# Each rule is executed independently of the others, so
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# take care to avoid overlap. As an optimization, rules
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# with the same `seriesQuery` but different
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# `name` or `seriesFilters` will use only one query to
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# Prometheus for discovery.
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# some of these rules are taken from the "default" configuration, which
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# can be found in pkg/config/default.go
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# this rule matches cumulative cAdvisor metrics measured in seconds
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- seriesQuery: '{__name__=~"^container_.*",container_name!="POD",namespace!="",pod_name!=""}'
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resources:
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# skip specifying generic resource<->label mappings, and just
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# attach only pod and namespace resources by mapping label names to group-resources
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overrides:
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namespace: {resource: "namespace"},
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pod_name: {resource: "pod"},
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# specify that the `container_` and `_seconds_total` suffixes should be removed.
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# this also introduces an implicit filter on metric family names
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name:
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# we use the value of the capture group implicitly as the API name
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# we could also explicitly write `as: "$1"`
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matches: "^container_(.*)_seconds_total$"
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# specify how to construct a query to fetch samples for a given series
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# This is a Go template where the `.Series` and `.LabelMatchers` string values
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# are available, and the delimiters are `${` and `}$` to avoid conflicts with
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# the prometheus query language
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metricsQuery: "sum(rate(${.Series}${${.LabelMatchers}$,container_name!="POD"}[2m])) by (${.GroupBy}$)"
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# this rule matches cumulative cAdvisor metrics not measured in seconds
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- seriesQuery: '{__name__=~"^container_.*",container_name!="POD",namespace!="",pod_name!=""}'
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resources:
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overrides:
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namespace: {resource: "namespace"},
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pod_name: {resource: "pod"},
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seriesFilters:
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# since this is a superset of the query above, we introduce an additional filter here
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- isNot: "^container_.*_seconds_total$"
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name: {matches: "^container_(.*)_total$"}
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metricsQuery: "sum(rate(${.Series}${${.LabelMatchers}$,container_name!="POD"}[2m])) by (${.GroupBy}$)"
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# this rule matches cumulative non-cAdvisor metrics
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- seriesQuery: '{namespace!="",__name__!="^container_.*"}'
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name: {matches: "^(.*)_total$"}
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resources:
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# specify an a generic mapping between resources and labels. This
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# is a template, like the `metricsQuery` template, except with the `.Group`
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# and `.Resource` strings available. It will also be used to match labels,
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# so avoid using template functions which truncate the group or resource.
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# Group will be converted to a form acceptible for use as a label automatically.
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template: "${.Resource}$"
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# if we wanted to, we could also specify overrides here
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metricsQuery: "sum(rate(${.Series}${${.LabelMatchers}$,container_name!="POD"}[2m])) by (${.GroupBy}$)"
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# this rule matches only a single metric, explicitly naming it something else
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# It's series query *must* return only a single metric family
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- seriesQuery: 'cheddar{sharp="true"}'
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# this metric will appear as "cheesy_goodness" in the custom metrics API
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name: {as: "cheesy_goodness"}
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resources:
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overrides:
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# this should still resolve in our cluster
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brand: {group: "cheese.io", resource: "brand"}
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metricQuery: 'count(cheddar{sharp="true"})'
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# TODO: should we be able to map to a constant instance of a resource
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# (e.g. `resources: {constant: [{resource: "namespace", name: "kube-system"}}]`)?
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