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config_gen_probe.go
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/
config_gen_probe.go
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package configgen
import (
"fmt"
"net/url"
"sort"
"strings"
promopv1 "github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring/v1"
namespacelabeler "github.com/prometheus-operator/prometheus-operator/pkg/namespace-labeler"
commonConfig "github.com/prometheus/common/config"
"github.com/prometheus/common/model"
"github.com/prometheus/prometheus/config"
"github.com/prometheus/prometheus/discovery"
promk8s "github.com/prometheus/prometheus/discovery/kubernetes"
"github.com/prometheus/prometheus/discovery/targetgroup"
"github.com/prometheus/prometheus/model/relabel"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
// See https://github.com/prometheus-operator/prometheus-operator/blob/aa8222d7e9b66e9293ed11c9291ea70173021029/pkg/prometheus/promcfg.go#L835
func (cg *ConfigGenerator) GenerateProbeConfig(m *promopv1.Probe) (cfg *config.ScrapeConfig, err error) {
c := config.DefaultScrapeConfig
cfg = &c
cfg.ScrapeInterval = config.DefaultGlobalConfig.ScrapeInterval
cfg.ScrapeTimeout = config.DefaultGlobalConfig.ScrapeTimeout
cfg.JobName = fmt.Sprintf("probe/%s/%s", m.Namespace, m.Name)
cfg.HonorTimestamps = true
cfg.MetricsPath = m.Spec.ProberSpec.Path
if m.Spec.Interval != "" {
cfg.ScrapeInterval, _ = model.ParseDuration(string(m.Spec.Interval))
}
if m.Spec.ScrapeTimeout != "" {
cfg.ScrapeInterval, _ = model.ParseDuration(string(m.Spec.ScrapeTimeout))
}
if m.Spec.ProberSpec.Scheme != "" {
cfg.Scheme = m.Spec.ProberSpec.Scheme
}
if m.Spec.ProberSpec.ProxyURL != "" {
if u, err := url.Parse(m.Spec.ProberSpec.ProxyURL); err != nil {
return nil, fmt.Errorf("parsing ProxyURL from probe: %w", err)
} else {
cfg.HTTPClientConfig.ProxyURL = commonConfig.URL{URL: u}
}
}
if m.Spec.Module != "" {
cfg.Params = url.Values{}
cfg.Params.Set("module", m.Spec.Module)
}
cfg.SampleLimit = uint(m.Spec.SampleLimit)
cfg.TargetLimit = uint(m.Spec.TargetLimit)
cfg.LabelLimit = uint(m.Spec.LabelLimit)
cfg.LabelNameLengthLimit = uint(m.Spec.LabelNameLengthLimit)
cfg.LabelValueLengthLimit = uint(m.Spec.LabelValueLengthLimit)
relabels := cg.initRelabelings()
if m.Spec.JobName != "" {
relabels.add(&relabel.Config{
Replacement: m.Spec.JobName,
TargetLabel: "job",
})
}
labeler := namespacelabeler.New("", nil, false)
static := m.Spec.Targets.StaticConfig
if static != nil {
// Generate static_config section.
grp := &targetgroup.Group{
Labels: model.LabelSet{},
}
for k, v := range static.Labels {
grp.Labels[model.LabelName(k)] = model.LabelValue(v)
}
for _, t := range static.Targets {
grp.Targets = append(grp.Targets, model.LabelSet{
model.AddressLabel: model.LabelValue(t),
})
}
sc := discovery.StaticConfig{grp}
relabels.add(&relabel.Config{
SourceLabels: model.LabelNames{"__address__"},
TargetLabel: "__param_target",
})
relabels.add(&relabel.Config{
SourceLabels: model.LabelNames{"__param_target"},
TargetLabel: "instance",
})
relabels.add(&relabel.Config{
Replacement: m.Spec.ProberSpec.URL,
TargetLabel: "__address__",
})
// Add configured relabelings.
if err = relabels.addFromV1(labeler.GetRelabelingConfigs(m.TypeMeta, m.ObjectMeta, m.Spec.Targets.StaticConfig.RelabelConfigs)...); err != nil {
return nil, fmt.Errorf("parsing relabel configs: %w", err)
}
cfg.ServiceDiscoveryConfigs = append(cfg.ServiceDiscoveryConfigs, sc)
} else if m.Spec.Targets.Ingress != nil {
// Generate kubernetes_sd_config section for the ingress resources.
labelKeys := make([]string, 0, len(m.Spec.Targets.Ingress.Selector.MatchLabels))
for k := range m.Spec.Targets.Ingress.Selector.MatchLabels {
labelKeys = append(labelKeys, k)
}
sort.Strings(labelKeys)
for _, k := range labelKeys {
regex, err := relabel.NewRegexp(fmt.Sprintf("(%s);true", m.Spec.Targets.Ingress.Selector.MatchLabels[k]))
if err != nil {
return nil, fmt.Errorf("parsing MatchLabels regex: %w", err)
}
relabels.add(&relabel.Config{
SourceLabels: model.LabelNames{"__meta_kubernetes_ingress_label_" + sanitizeLabelName(k), "__meta_kubernetes_ingress_labelpresent_" + sanitizeLabelName(k)},
Action: "keep",
Regex: regex,
})
}
for _, exp := range m.Spec.Targets.Ingress.Selector.MatchExpressions {
switch exp.Operator {
case metav1.LabelSelectorOpIn:
regex, err := relabel.NewRegexp(fmt.Sprintf("(%s);true", strings.Join(exp.Values, "|")))
if err != nil {
return nil, fmt.Errorf("parsing MatchExpressions regex: %w", err)
}
relabels.add(&relabel.Config{
SourceLabels: model.LabelNames{"__meta_kubernetes_ingress_label_" + sanitizeLabelName(exp.Key), "__meta_kubernetes_ingress_labelpresent_" + sanitizeLabelName(exp.Key)},
Action: "keep",
Regex: regex,
})
case metav1.LabelSelectorOpNotIn:
regex, err := relabel.NewRegexp(fmt.Sprintf("(%s);true", strings.Join(exp.Values, "|")))
if err != nil {
return nil, fmt.Errorf("parsing MatchExpressions regex: %w", err)
}
relabels.add(&relabel.Config{
SourceLabels: model.LabelNames{"__meta_kubernetes_ingress_label_" + sanitizeLabelName(exp.Key), "__meta_kubernetes_ingress_labelpresent_" + sanitizeLabelName(exp.Key)},
Action: "drop",
Regex: regex,
})
case metav1.LabelSelectorOpExists:
relabels.add(&relabel.Config{
SourceLabels: model.LabelNames{"__meta_kubernetes_ingress_labelpresent_" + sanitizeLabelName(exp.Key)},
Action: "keep",
Regex: regexTrue,
})
case metav1.LabelSelectorOpDoesNotExist:
relabels.add(&relabel.Config{
SourceLabels: model.LabelNames{"__meta_kubernetes_ingress_labelpresent_" + sanitizeLabelName(exp.Key)},
Action: "drop",
Regex: regexTrue,
})
}
}
dConfig := cg.generateK8SSDConfig(m.Spec.Targets.Ingress.NamespaceSelector, m.Namespace, promk8s.RoleIngress, nil)
cfg.ServiceDiscoveryConfigs = append(cfg.ServiceDiscoveryConfigs, dConfig)
// Relabelings for ingress SD.
regex := relabel.MustNewRegexp("(.+);(.+);(.+)")
relabels.add(
&relabel.Config{
SourceLabels: model.LabelNames{"__meta_kubernetes_ingress_scheme", "__address__", "__meta_kubernetes_ingress_path"},
TargetLabel: "__param_target",
Separator: ";",
Regex: regex,
Replacement: "${1}://${2}${3}",
},
&relabel.Config{
SourceLabels: model.LabelNames{"__meta_kubernetes_namespace"},
TargetLabel: "namespace",
},
&relabel.Config{
SourceLabels: model.LabelNames{"__meta_kubernetes_ingress_name"},
TargetLabel: "ingress",
})
// Relabelings for prober.
relabels.add(
&relabel.Config{
SourceLabels: model.LabelNames{"__address__"},
TargetLabel: "__tmp_ingress_address",
Separator: ";",
Regex: regexAnything,
Replacement: "$1",
},
&relabel.Config{
SourceLabels: model.LabelNames{"__param_target"},
TargetLabel: "instance",
},
&relabel.Config{
Replacement: m.Spec.ProberSpec.URL,
TargetLabel: "__address__",
})
// Add configured relabelings.
if err = relabels.addFromV1(labeler.GetRelabelingConfigs(m.TypeMeta, m.ObjectMeta, m.Spec.Targets.Ingress.RelabelConfigs)...); err != nil {
return nil, fmt.Errorf("parsing relabel configs: %w", err)
}
}
cfg.RelabelConfigs = relabels.configs
if m.Spec.TLSConfig != nil {
if cfg.HTTPClientConfig.TLSConfig, err = cg.generateSafeTLS(m.Spec.TLSConfig.SafeTLSConfig, m.Namespace); err != nil {
return nil, err
}
}
if m.Spec.BearerTokenSecret.Name != "" {
val, err := cg.Secrets.GetSecretValue(m.Namespace, m.Spec.BearerTokenSecret)
if err != nil {
return nil, err
}
cfg.HTTPClientConfig.BearerToken = commonConfig.Secret(val)
}
if m.Spec.BasicAuth != nil {
cfg.HTTPClientConfig.BasicAuth, err = cg.generateBasicAuth(*m.Spec.BasicAuth, m.Namespace)
if err != nil {
return nil, err
}
}
if m.Spec.OAuth2 != nil {
cfg.HTTPClientConfig.OAuth2, err = cg.generateOauth2(*m.Spec.OAuth2, m.Namespace)
if err != nil {
return nil, err
}
}
if m.Spec.Authorization != nil {
cfg.HTTPClientConfig.Authorization, err = cg.generateAuthorization(*m.Spec.Authorization, m.Namespace)
if err != nil {
return nil, err
}
}
metricRelabels := relabeler{}
err = metricRelabels.addFromV1(labeler.GetRelabelingConfigs(m.TypeMeta, m.ObjectMeta, m.Spec.MetricRelabelConfigs)...)
if err != nil {
return nil, err
}
cfg.MetricRelabelConfigs = metricRelabels.configs
return cfg, nil
}