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https://github.com/kubernetes-sigs/prometheus-adapter.git
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Add a helper to generate legacy configuration
This moves the DefaultConfig method out into a helper to generate legacy configuration. Passing in a config file is now required.
This commit is contained in:
Solly Ross
parent
ad1837e9b5
commit
40a9ee2474
9 changed files with 150 additions and 40 deletions
44
cmd/config-gen/main.go
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44
cmd/config-gen/main.go
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package main
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import (
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"fmt"
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"os"
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"time"
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"github.com/spf13/cobra"
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yaml "gopkg.in/yaml.v2"
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"github.com/directxman12/k8s-prometheus-adapter/cmd/config-gen/utils"
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)
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func main() {
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var labelPrefix string
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var rateInterval time.Duration
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cmd := &cobra.Command{
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Short: "Generate a config matching the legacy discovery rules",
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Long: `Generate a config that produces the same functionality
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as the legacy discovery rules. This includes discovering metrics and associating
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resources according to the Kubernetes instrumention conventions and the cAdvisor
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conventions, and auto-converting cumulative metrics into rate metrics.`,
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RunE: func(c *cobra.Command, args []string) error {
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cfg := utils.DefaultConfig(rateInterval, labelPrefix)
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enc := yaml.NewEncoder(os.Stdout)
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if err := enc.Encode(cfg); err != nil {
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return err
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}
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return enc.Close()
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},
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}
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cmd.Flags().StringVar(&labelPrefix, "label-prefix", "",
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"Prefix to expect on labels referring to pod resources. For example, if the prefix is "+
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"'kube_', any series with the 'kube_pod' label would be considered a pod metric")
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cmd.Flags().DurationVar(&rateInterval, "rate-interval", 5*time.Minute,
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"Period of time used to calculate rate metrics from cumulative metrics")
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if err := cmd.Execute(); err != nil {
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fmt.Fprintf(os.Stderr, "Unable to generate config: %v\n", err)
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os.Exit(1)
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}
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}
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93
cmd/config-gen/utils/default.go
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93
cmd/config-gen/utils/default.go
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@ -0,0 +1,93 @@
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package utils
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import (
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"fmt"
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"time"
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prom "github.com/directxman12/k8s-prometheus-adapter/pkg/client"
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. "github.com/directxman12/k8s-prometheus-adapter/pkg/config"
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pmodel "github.com/prometheus/common/model"
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)
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// DefaultConfig returns a configuration equivalent to the former
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// pre-advanced-config settings. This means that "normal" series labels
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// will be of the form `<prefix><<.Resource>>`, cadvisor series will be
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// of the form `container_`, and have the label `pod_name`. Any series ending
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// in total will be treated as a rate metric.
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func DefaultConfig(rateInterval time.Duration, labelPrefix string) *MetricsDiscoveryConfig {
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return &MetricsDiscoveryConfig{
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Rules: []DiscoveryRule{
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// container seconds rate metrics
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{
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SeriesQuery: string(prom.MatchSeries("", prom.NameMatches("^container_.*"), prom.LabelNeq("container_name", "POD"), prom.LabelNeq("namespace", ""), prom.LabelNeq("pod_name", ""))),
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Resources: ResourceMapping{
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Overrides: map[string]GroupResource{
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"namespace": {Resource: "namespace"},
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"pod_name": {Resource: "pod"},
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},
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},
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Name: NameMapping{Matches: "^container_(.*)_seconds_total$"},
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MetricsQuery: fmt.Sprintf(`sum(rate(<<.Series>>{<<.LabelMatchers>>,container_name!="POD"}[%s])) by (<<.GroupBy>>)`, pmodel.Duration(rateInterval).String()),
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},
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// container rate metrics
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{
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SeriesQuery: string(prom.MatchSeries("", prom.NameMatches("^container_.*"), prom.LabelNeq("container_name", "POD"), prom.LabelNeq("namespace", ""), prom.LabelNeq("pod_name", ""))),
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SeriesFilters: []RegexFilter{{IsNot: "^container_.*_seconds_total$"}},
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Resources: ResourceMapping{
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Overrides: map[string]GroupResource{
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"namespace": {Resource: "namespace"},
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"pod_name": {Resource: "pod"},
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},
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},
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Name: NameMapping{Matches: "^container_(.*)_total$"},
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MetricsQuery: fmt.Sprintf(`sum(rate(<<.Series>>{<<.LabelMatchers>>,container_name!="POD"}[%s])) by (<<.GroupBy>>)`, pmodel.Duration(rateInterval).String()),
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},
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// container non-cumulative metrics
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{
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SeriesQuery: string(prom.MatchSeries("", prom.NameMatches("^container_.*"), prom.LabelNeq("container_name", "POD"), prom.LabelNeq("namespace", ""), prom.LabelNeq("pod_name", ""))),
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SeriesFilters: []RegexFilter{{IsNot: "^container_.*_total$"}},
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Resources: ResourceMapping{
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Overrides: map[string]GroupResource{
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"namespace": {Resource: "namespace"},
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"pod_name": {Resource: "pod"},
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},
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},
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Name: NameMapping{Matches: "^container_(.*)$"},
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MetricsQuery: `sum(<<.Series>>{<<.LabelMatchers>>,container_name!="POD"}) by (<<.GroupBy>>)`,
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},
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// normal non-cumulative metrics
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{
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SeriesQuery: string(prom.MatchSeries("", prom.LabelNeq(fmt.Sprintf("%snamespace", labelPrefix), ""), prom.NameNotMatches("^container_.*"))),
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SeriesFilters: []RegexFilter{{IsNot: ".*_total$"}},
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Resources: ResourceMapping{
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Template: fmt.Sprintf("%s<<.Resource>>", labelPrefix),
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},
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MetricsQuery: "sum(<<.Series>>{<<.LabelMatchers>>}) by (<<.GroupBy>>)",
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},
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// normal rate metrics
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{
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SeriesQuery: string(prom.MatchSeries("", prom.LabelNeq(fmt.Sprintf("%snamespace", labelPrefix), ""), prom.NameNotMatches("^container_.*"))),
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SeriesFilters: []RegexFilter{{IsNot: ".*_seconds_total"}},
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Name: NameMapping{Matches: "^(.*)_total$"},
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Resources: ResourceMapping{
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Template: fmt.Sprintf("%s<<.Resource>>", labelPrefix),
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},
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MetricsQuery: fmt.Sprintf("sum(rate(<<.Series>>{<<.LabelMatchers>>}[%s])) by (<<.GroupBy>>)", pmodel.Duration(rateInterval).String()),
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},
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// seconds rate metrics
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{
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SeriesQuery: string(prom.MatchSeries("", prom.LabelNeq(fmt.Sprintf("%snamespace", labelPrefix), ""), prom.NameNotMatches("^container_.*"))),
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Name: NameMapping{Matches: "^(.*)_seconds_total$"},
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Resources: ResourceMapping{
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Template: fmt.Sprintf("%s<<.Resource>>", labelPrefix),
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},
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MetricsQuery: fmt.Sprintf("sum(rate(<<.Series>>{<<.LabelMatchers>>}[%s])) by (<<.GroupBy>>)", pmodel.Duration(rateInterval).String()),
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},
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},
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}
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}
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