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promcfg.go
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promcfg.go
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// Copyright 2016 The prometheus-operator Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package prometheus
import (
"fmt"
"path"
"regexp"
"sort"
"strings"
"github.com/blang/semver/v4"
"github.com/go-kit/log"
"github.com/go-kit/log/level"
"github.com/pkg/errors"
"gopkg.in/yaml.v2"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
v1 "github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring/v1"
"github.com/prometheus-operator/prometheus-operator/pkg/assets"
"github.com/prometheus-operator/prometheus-operator/pkg/operator"
)
const (
kubernetesSDRoleEndpoint = "endpoints"
kubernetesSDRolePod = "pod"
kubernetesSDRoleIngress = "ingress"
)
var (
invalidLabelCharRE = regexp.MustCompile(`[^a-zA-Z0-9_]`)
)
// ConfigGenerator is used to create Prometheus configurations from operator resources.
type ConfigGenerator struct {
logger log.Logger
}
// NewConfigGenerator creates a ConfigGenerator instance using the provided Logger.
func NewConfigGenerator(logger log.Logger) *ConfigGenerator {
cg := &ConfigGenerator{
logger: logger,
}
return cg
}
func sanitizeLabelName(name string) string {
return invalidLabelCharRE.ReplaceAllString(name, "_")
}
func stringMapToMapSlice(m map[string]string) yaml.MapSlice {
res := yaml.MapSlice{}
ks := make([]string, 0)
for k := range m {
ks = append(ks, k)
}
sort.Strings(ks)
for _, k := range ks {
res = append(res, yaml.MapItem{Key: k, Value: m[k]})
}
return res
}
func addSafeTLStoYaml(cfg yaml.MapSlice, namespace string, tls v1.SafeTLSConfig) yaml.MapSlice {
pathForSelector := func(sel v1.SecretOrConfigMap) string {
return path.Join(tlsAssetsDir, assets.TLSAssetKeyFromSelector(namespace, sel).String())
}
tlsConfig := yaml.MapSlice{
{Key: "insecure_skip_verify", Value: tls.InsecureSkipVerify},
}
if tls.CA.Secret != nil || tls.CA.ConfigMap != nil {
tlsConfig = append(tlsConfig, yaml.MapItem{Key: "ca_file", Value: pathForSelector(tls.CA)})
}
if tls.Cert.Secret != nil || tls.Cert.ConfigMap != nil {
tlsConfig = append(tlsConfig, yaml.MapItem{Key: "cert_file", Value: pathForSelector(tls.Cert)})
}
if tls.KeySecret != nil {
tlsConfig = append(tlsConfig, yaml.MapItem{Key: "key_file", Value: pathForSelector(v1.SecretOrConfigMap{Secret: tls.KeySecret})})
}
if tls.ServerName != "" {
tlsConfig = append(tlsConfig, yaml.MapItem{Key: "server_name", Value: tls.ServerName})
}
cfg = append(cfg, yaml.MapItem{Key: "tls_config", Value: tlsConfig})
return cfg
}
func addTLStoYaml(cfg yaml.MapSlice, namespace string, tls *v1.TLSConfig) yaml.MapSlice {
if tls != nil {
tlsConfig := addSafeTLStoYaml(yaml.MapSlice{}, namespace, tls.SafeTLSConfig)[0].Value.(yaml.MapSlice)
if tls.CAFile != "" {
tlsConfig = append(tlsConfig, yaml.MapItem{Key: "ca_file", Value: tls.CAFile})
}
if tls.CertFile != "" {
tlsConfig = append(tlsConfig, yaml.MapItem{Key: "cert_file", Value: tls.CertFile})
}
if tls.KeyFile != "" {
tlsConfig = append(tlsConfig, yaml.MapItem{Key: "key_file", Value: tls.KeyFile})
}
cfg = append(cfg, yaml.MapItem{Key: "tls_config", Value: tlsConfig})
}
return cfg
}
func addSafeAuthorizationToYaml(
cfg yaml.MapSlice,
version semver.Version,
assetStoreKey string,
store *assets.Store,
auth *v1.SafeAuthorization,
logger log.Logger,
) yaml.MapSlice {
if auth == nil {
return cfg
}
if version.LT(semver.MustParse("2.26.0")) {
// extract current cfg section from assetStoreKey, assuming
// "<component>/something..."
component := strings.Split(assetStoreKey, "/")[0]
level.Warn(logger).Log("msg", "found authorization section, but prometheus version is < 2.26.0, ignoring",
"component", component, "version", version)
return cfg
}
authCfg := yaml.MapSlice{}
if auth.Type == "" {
auth.Type = "Bearer"
}
authCfg = append(authCfg, yaml.MapItem{Key: "type", Value: strings.TrimSpace(auth.Type)})
if auth.Credentials != nil {
if s, ok := store.TokenAssets[assetStoreKey]; ok {
authCfg = append(authCfg, yaml.MapItem{Key: "credentials", Value: s})
}
}
return append(cfg, yaml.MapItem{Key: "authorization", Value: authCfg})
}
func addAuthorizationToYaml(
cfg yaml.MapSlice,
version semver.Version,
assetStoreKey string,
store *assets.Store,
auth *v1.Authorization,
logger log.Logger,
) yaml.MapSlice {
if auth == nil {
return cfg
}
if version.LT(semver.MustParse("2.26.0")) {
// extract current cfg section from assetStoreKey, assuming
// "<component>/something..."
component := strings.Split(assetStoreKey, "/")[0]
level.Warn(logger).Log("msg", "found authorization section, but prometheus version is < 2.26.0, ignoring",
"component", component, "version", version)
return cfg
}
// reuse addSafeAuthorizationToYaml and unpack the part we're interested
// in, namely the value under the "authorization" key
authCfg := addSafeAuthorizationToYaml(yaml.MapSlice{}, version, assetStoreKey, store, &auth.SafeAuthorization, logger)[0].Value.(yaml.MapSlice)
if auth.CredentialsFile != "" {
authCfg = append(authCfg, yaml.MapItem{Key: "credentials_file", Value: auth.CredentialsFile})
}
return append(cfg, yaml.MapItem{Key: "authorization", Value: authCfg})
}
func buildExternalLabels(p *v1.Prometheus) yaml.MapSlice {
m := map[string]string{}
// Use "prometheus" external label name by default if field is missing.
// Do not add external label if field is set to empty string.
prometheusExternalLabelName := "prometheus"
if p.Spec.PrometheusExternalLabelName != nil {
if *p.Spec.PrometheusExternalLabelName != "" {
prometheusExternalLabelName = *p.Spec.PrometheusExternalLabelName
} else {
prometheusExternalLabelName = ""
}
}
// Use defaultReplicaExternalLabelName constant by default if field is missing.
// Do not add external label if field is set to empty string.
replicaExternalLabelName := defaultReplicaExternalLabelName
if p.Spec.ReplicaExternalLabelName != nil {
if *p.Spec.ReplicaExternalLabelName != "" {
replicaExternalLabelName = *p.Spec.ReplicaExternalLabelName
} else {
replicaExternalLabelName = ""
}
}
if prometheusExternalLabelName != "" {
m[prometheusExternalLabelName] = fmt.Sprintf("%s/%s", p.Namespace, p.Name)
}
if replicaExternalLabelName != "" {
m[replicaExternalLabelName] = "$(POD_NAME)"
}
for n, v := range p.Spec.ExternalLabels {
m[n] = v
}
return stringMapToMapSlice(m)
}
// GenerateConfig creates a serialized YAML representation of a Prometheus configuration using the provided resources.
func (cg *ConfigGenerator) GenerateConfig(
p *v1.Prometheus,
sMons map[string]*v1.ServiceMonitor,
pMons map[string]*v1.PodMonitor,
probes map[string]*v1.Probe,
store *assets.Store,
additionalScrapeConfigs []byte,
additionalAlertRelabelConfigs []byte,
additionalAlertManagerConfigs []byte,
ruleConfigMapNames []string,
) ([]byte, error) {
versionStr := p.Spec.Version
if versionStr == "" {
versionStr = operator.DefaultPrometheusVersion
}
version, err := semver.ParseTolerant(versionStr)
if err != nil {
return nil, errors.Wrap(err, "parse version")
}
cfg := yaml.MapSlice{}
scrapeInterval := "30s"
if p.Spec.ScrapeInterval != "" {
scrapeInterval = p.Spec.ScrapeInterval
}
evaluationInterval := "30s"
if p.Spec.EvaluationInterval != "" {
evaluationInterval = p.Spec.EvaluationInterval
}
globalItems := yaml.MapSlice{
{Key: "evaluation_interval", Value: evaluationInterval},
{Key: "scrape_interval", Value: scrapeInterval},
{Key: "external_labels", Value: buildExternalLabels(p)},
}
if p.Spec.ScrapeTimeout != "" {
globalItems = append(globalItems, yaml.MapItem{
Key: "scrape_timeout", Value: p.Spec.ScrapeTimeout,
})
}
if version.GTE(semver.MustParse("2.16.0")) && p.Spec.QueryLogFile != "" {
globalItems = append(globalItems, yaml.MapItem{
Key: "query_log_file", Value: p.Spec.QueryLogFile,
})
}
cfg = append(cfg, yaml.MapItem{Key: "global", Value: globalItems})
ruleFilePaths := []string{}
for _, name := range ruleConfigMapNames {
ruleFilePaths = append(ruleFilePaths, rulesDir+"/"+name+"/*.yaml")
}
cfg = append(cfg, yaml.MapItem{
Key: "rule_files",
Value: ruleFilePaths,
})
sMonIdentifiers := make([]string, len(sMons))
i := 0
for k := range sMons {
sMonIdentifiers[i] = k
i++
}
// Sorting ensures, that we always generate the config in the same order.
sort.Strings(sMonIdentifiers)
pMonIdentifiers := make([]string, len(pMons))
i = 0
for k := range pMons {
pMonIdentifiers[i] = k
i++
}
// Sorting ensures, that we always generate the config in the same order.
sort.Strings(pMonIdentifiers)
probeIdentifiers := make([]string, len(probes))
i = 0
for k := range probes {
probeIdentifiers[i] = k
i++
}
// Sorting ensures, that we always generate the config in the same order.
sort.Strings(probeIdentifiers)
apiserverConfig := p.Spec.APIServerConfig
shards := int32(1)
if p.Spec.Shards != nil && *p.Spec.Shards > 1 {
shards = *p.Spec.Shards
}
var scrapeConfigs []yaml.MapSlice
for _, identifier := range sMonIdentifiers {
for i, ep := range sMons[identifier].Spec.Endpoints {
scrapeConfigs = append(scrapeConfigs,
cg.generateServiceMonitorConfig(
version,
sMons[identifier],
ep, i,
apiserverConfig,
store,
p.Spec.OverrideHonorLabels,
p.Spec.OverrideHonorTimestamps,
p.Spec.IgnoreNamespaceSelectors,
p.Spec.EnforcedNamespaceLabel,
p.Spec.EnforcedSampleLimit,
p.Spec.EnforcedTargetLimit,
p.Spec.EnforcedLabelLimit,
p.Spec.EnforcedLabelNameLengthLimit,
p.Spec.EnforcedLabelValueLengthLimit,
p.Spec.EnforcedBodySizeLimit,
shards,
),
)
}
}
for _, identifier := range pMonIdentifiers {
for i, ep := range pMons[identifier].Spec.PodMetricsEndpoints {
scrapeConfigs = append(scrapeConfigs,
cg.generatePodMonitorConfig(
version,
pMons[identifier], ep, i,
apiserverConfig,
store,
p.Spec.OverrideHonorLabels,
p.Spec.OverrideHonorTimestamps,
p.Spec.IgnoreNamespaceSelectors,
p.Spec.EnforcedNamespaceLabel,
p.Spec.EnforcedSampleLimit,
p.Spec.EnforcedTargetLimit,
p.Spec.EnforcedLabelLimit,
p.Spec.EnforcedLabelNameLengthLimit,
p.Spec.EnforcedLabelValueLengthLimit,
p.Spec.EnforcedBodySizeLimit,
shards,
),
)
}
}
for _, identifier := range probeIdentifiers {
scrapeConfigs = append(scrapeConfigs,
cg.generateProbeConfig(
version,
probes[identifier],
apiserverConfig,
store,
p.Spec.OverrideHonorLabels,
p.Spec.OverrideHonorTimestamps,
p.Spec.IgnoreNamespaceSelectors,
p.Spec.EnforcedNamespaceLabel,
p.Spec.EnforcedSampleLimit,
p.Spec.EnforcedTargetLimit,
p.Spec.EnforcedLabelLimit,
p.Spec.EnforcedLabelNameLengthLimit,
p.Spec.EnforcedLabelValueLengthLimit,
p.Spec.EnforcedBodySizeLimit,
),
)
}
var alertmanagerConfigs []yaml.MapSlice
alertmanagerConfigs = cg.generateAlertmanagerConfig(version, p.Spec.Alerting, apiserverConfig, store)
var additionalScrapeConfigsYaml []yaml.MapSlice
err = yaml.Unmarshal([]byte(additionalScrapeConfigs), &additionalScrapeConfigsYaml)
if err != nil {
return nil, errors.Wrap(err, "unmarshalling additional scrape configs failed")
}
cfg = append(cfg, yaml.MapItem{
Key: "scrape_configs",
Value: append(scrapeConfigs, additionalScrapeConfigsYaml...),
})
var additionalAlertManagerConfigsYaml []yaml.MapSlice
err = yaml.Unmarshal([]byte(additionalAlertManagerConfigs), &additionalAlertManagerConfigsYaml)
if err != nil {
return nil, errors.Wrap(err, "unmarshalling additional alert manager configs failed")
}
alertmanagerConfigs = append(alertmanagerConfigs, additionalAlertManagerConfigsYaml...)
var alertRelabelConfigs []yaml.MapSlice
// Use defaultReplicaExternalLabelName constant by default if field is missing.
// Do not add external label if field is set to empty string.
replicaExternalLabelName := defaultReplicaExternalLabelName
if p.Spec.ReplicaExternalLabelName != nil {
if *p.Spec.ReplicaExternalLabelName != "" {
replicaExternalLabelName = *p.Spec.ReplicaExternalLabelName
} else {
replicaExternalLabelName = ""
}
}
if replicaExternalLabelName != "" {
// Drop replica label, to make alerts from multiple Prometheus replicas alike
alertRelabelConfigs = append(alertRelabelConfigs, yaml.MapSlice{
{Key: "action", Value: "labeldrop"},
{Key: "regex", Value: regexp.QuoteMeta(replicaExternalLabelName)},
})
}
var additionalAlertRelabelConfigsYaml []yaml.MapSlice
err = yaml.Unmarshal([]byte(additionalAlertRelabelConfigs), &additionalAlertRelabelConfigsYaml)
if err != nil {
return nil, errors.Wrap(err, "unmarshalling additional alerting relabel configs failed")
}
cfg = append(cfg, yaml.MapItem{
Key: "alerting",
Value: yaml.MapSlice{
{
Key: "alert_relabel_configs",
Value: append(alertRelabelConfigs, additionalAlertRelabelConfigsYaml...),
},
{
Key: "alertmanagers",
Value: alertmanagerConfigs,
},
},
})
if len(p.Spec.RemoteWrite) > 0 {
cfg = append(cfg, cg.generateRemoteWriteConfig(version, p, store))
}
if len(p.Spec.RemoteRead) > 0 {
cfg = append(cfg, cg.generateRemoteReadConfig(version, p, store))
}
return yaml.Marshal(cfg)
}
// honorLabels determines the value of honor_labels.
// if overrideHonorLabels is true and user tries to set the
// value to true, we want to set honor_labels to false.
func honorLabels(userHonorLabels, overrideHonorLabels bool) bool {
if userHonorLabels && overrideHonorLabels {
return false
}
return userHonorLabels
}
// honorTimestamps adds option to enforce honor_timestamps option in scrape_config.
// We want to disable honoring timestamps when user specified it or when global
// override is set. For backwards compatibility with prometheus <2.9.0 we don't
// set honor_timestamps when that option wasn't specified anywhere
func honorTimestamps(cfg yaml.MapSlice, userHonorTimestamps *bool, overrideHonorTimestamps bool) yaml.MapSlice {
// Ensuring backwards compatibility by checking if user set any option
if userHonorTimestamps == nil && !overrideHonorTimestamps {
return cfg
}
honor := false
if userHonorTimestamps != nil {
honor = *userHonorTimestamps
}
return append(cfg, yaml.MapItem{Key: "honor_timestamps", Value: honor && !overrideHonorTimestamps})
}
func initRelabelings() []yaml.MapSlice {
// Relabel prometheus job name into a meta label
return []yaml.MapSlice{
{
{Key: "source_labels", Value: []string{"job"}},
{Key: "target_label", Value: "__tmp_prometheus_job_name"},
},
}
}
func (cg *ConfigGenerator) generatePodMonitorConfig(
version semver.Version,
m *v1.PodMonitor,
ep v1.PodMetricsEndpoint,
i int, apiserverConfig *v1.APIServerConfig,
store *assets.Store,
ignoreHonorLabels bool,
overrideHonorTimestamps bool,
ignoreNamespaceSelectors bool,
enforcedNamespaceLabel string,
enforcedSampleLimit *uint64,
enforcedTargetLimit *uint64,
enforcedLabelLimit *uint64,
enforcedLabelNameLengthLimit *uint64,
enforcedLabelValueLengthLimit *uint64,
enforcedBodySizeLimit string,
shards int32,
) yaml.MapSlice {
logger := log.With(cg.logger, "podMonitor", m.Name, "namespace", m.Namespace)
hl := honorLabels(ep.HonorLabels, ignoreHonorLabels)
cfg := yaml.MapSlice{
{
Key: "job_name",
Value: fmt.Sprintf("podMonitor/%s/%s/%d", m.Namespace, m.Name, i),
},
{
Key: "honor_labels",
Value: hl,
},
}
if version.Major == 2 && version.Minor >= 9 {
cfg = honorTimestamps(cfg, ep.HonorTimestamps, overrideHonorTimestamps)
}
selectedNamespaces := getNamespacesFromNamespaceSelector(&m.Spec.NamespaceSelector, m.Namespace, ignoreNamespaceSelectors)
cfg = append(cfg, cg.generateK8SSDConfig(version, selectedNamespaces, apiserverConfig, store, kubernetesSDRolePod))
if ep.Interval != "" {
cfg = append(cfg, yaml.MapItem{Key: "scrape_interval", Value: ep.Interval})
}
if ep.ScrapeTimeout != "" {
cfg = append(cfg, yaml.MapItem{Key: "scrape_timeout", Value: ep.ScrapeTimeout})
}
if ep.Path != "" {
cfg = append(cfg, yaml.MapItem{Key: "metrics_path", Value: ep.Path})
}
if ep.ProxyURL != nil {
cfg = append(cfg, yaml.MapItem{Key: "proxy_url", Value: ep.ProxyURL})
}
if ep.Params != nil {
cfg = append(cfg, yaml.MapItem{Key: "params", Value: ep.Params})
}
if ep.Scheme != "" {
cfg = append(cfg, yaml.MapItem{Key: "scheme", Value: ep.Scheme})
}
if ep.TLSConfig != nil {
cfg = addSafeTLStoYaml(cfg, m.Namespace, ep.TLSConfig.SafeTLSConfig)
}
if ep.BearerTokenSecret.Name != "" {
if s, ok := store.TokenAssets[fmt.Sprintf("podMonitor/%s/%s/%d", m.Namespace, m.Name, i)]; ok {
cfg = append(cfg, yaml.MapItem{Key: "bearer_token", Value: s})
}
}
if ep.BasicAuth != nil {
if s, ok := store.BasicAuthAssets[fmt.Sprintf("podMonitor/%s/%s/%d", m.Namespace, m.Name, i)]; ok {
cfg = append(cfg, yaml.MapItem{
Key: "basic_auth", Value: yaml.MapSlice{
{Key: "username", Value: s.Username},
{Key: "password", Value: s.Password},
},
})
}
}
assetKey := fmt.Sprintf("podMonitor/%s/%s/%d", m.Namespace, m.Name, i)
cfg = addOAuth2ToYaml(cfg, version, ep.OAuth2, store.OAuth2Assets, assetKey)
cfg = addSafeAuthorizationToYaml(cfg, version, fmt.Sprintf("podMonitor/auth/%s/%s/%d", m.Namespace, m.Name, i), store, ep.Authorization, logger)
relabelings := initRelabelings()
var labelKeys []string
// Filter targets by pods selected by the monitor.
// Exact label matches.
for k := range m.Spec.Selector.MatchLabels {
labelKeys = append(labelKeys, k)
}
sort.Strings(labelKeys)
for _, k := range labelKeys {
relabelings = append(relabelings, yaml.MapSlice{
{Key: "action", Value: "keep"},
{Key: "source_labels", Value: []string{"__meta_kubernetes_pod_label_" + sanitizeLabelName(k)}},
{Key: "regex", Value: m.Spec.Selector.MatchLabels[k]},
})
}
// Set based label matching. We have to map the valid relations
// `In`, `NotIn`, `Exists`, and `DoesNotExist`, into relabeling rules.
for _, exp := range m.Spec.Selector.MatchExpressions {
switch exp.Operator {
case metav1.LabelSelectorOpIn:
relabelings = append(relabelings, yaml.MapSlice{
{Key: "action", Value: "keep"},
{Key: "source_labels", Value: []string{"__meta_kubernetes_pod_label_" + sanitizeLabelName(exp.Key)}},
{Key: "regex", Value: strings.Join(exp.Values, "|")},
})
case metav1.LabelSelectorOpNotIn:
relabelings = append(relabelings, yaml.MapSlice{
{Key: "action", Value: "drop"},
{Key: "source_labels", Value: []string{"__meta_kubernetes_pod_label_" + sanitizeLabelName(exp.Key)}},
{Key: "regex", Value: strings.Join(exp.Values, "|")},
})
case metav1.LabelSelectorOpExists:
relabelings = append(relabelings, yaml.MapSlice{
{Key: "action", Value: "keep"},
{Key: "source_labels", Value: []string{"__meta_kubernetes_pod_labelpresent_" + sanitizeLabelName(exp.Key)}},
{Key: "regex", Value: "true"},
})
case metav1.LabelSelectorOpDoesNotExist:
relabelings = append(relabelings, yaml.MapSlice{
{Key: "action", Value: "drop"},
{Key: "source_labels", Value: []string{"__meta_kubernetes_pod_labelpresent_" + sanitizeLabelName(exp.Key)}},
{Key: "regex", Value: "true"},
})
}
}
// Filter targets based on correct port for the endpoint.
if ep.Port != "" {
relabelings = append(relabelings, yaml.MapSlice{
{Key: "action", Value: "keep"},
{Key: "source_labels", Value: []string{"__meta_kubernetes_pod_container_port_name"}},
{Key: "regex", Value: ep.Port},
})
} else if ep.TargetPort != nil { //nolint:staticcheck // Ignore SA1019 this field is marked as deprecated.
level.Warn(logger).Log("msg", "'targetPort' is deprecated, use 'port' instead.")
//nolint:staticcheck // Ignore SA1019 this field is marked as deprecated.
if ep.TargetPort.StrVal != "" {
relabelings = append(relabelings, yaml.MapSlice{
{Key: "action", Value: "keep"},
{Key: "source_labels", Value: []string{"__meta_kubernetes_pod_container_port_name"}},
{Key: "regex", Value: ep.TargetPort.String()},
})
} else if ep.TargetPort.IntVal != 0 { //nolint:staticcheck // Ignore SA1019 this field is marked as deprecated.
relabelings = append(relabelings, yaml.MapSlice{
{Key: "action", Value: "keep"},
{Key: "source_labels", Value: []string{"__meta_kubernetes_pod_container_port_number"}},
{Key: "regex", Value: ep.TargetPort.String()},
})
}
}
// Relabel namespace and pod and service labels into proper labels.
relabelings = append(relabelings, []yaml.MapSlice{
{
{Key: "source_labels", Value: []string{"__meta_kubernetes_namespace"}},
{Key: "target_label", Value: "namespace"},
},
{
{Key: "source_labels", Value: []string{"__meta_kubernetes_pod_container_name"}},
{Key: "target_label", Value: "container"},
},
{
{Key: "source_labels", Value: []string{"__meta_kubernetes_pod_name"}},
{Key: "target_label", Value: "pod"},
},
}...)
// Relabel targetLabels from Pod onto target.
for _, l := range m.Spec.PodTargetLabels {
relabelings = append(relabelings, yaml.MapSlice{
{Key: "source_labels", Value: []string{"__meta_kubernetes_pod_label_" + sanitizeLabelName(l)}},
{Key: "target_label", Value: sanitizeLabelName(l)},
{Key: "regex", Value: "(.+)"},
{Key: "replacement", Value: "${1}"},
})
}
// By default, generate a safe job name from the PodMonitor. We also keep
// this around if a jobLabel is set in case the targets don't actually have a
// value for it. A single pod may potentially have multiple metrics
// endpoints, therefore the endpoints labels is filled with the ports name or
// as a fallback the port number.
relabelings = append(relabelings, yaml.MapSlice{
{Key: "target_label", Value: "job"},
{Key: "replacement", Value: fmt.Sprintf("%s/%s", m.GetNamespace(), m.GetName())},
})
if m.Spec.JobLabel != "" {
relabelings = append(relabelings, yaml.MapSlice{
{Key: "source_labels", Value: []string{"__meta_kubernetes_pod_label_" + sanitizeLabelName(m.Spec.JobLabel)}},
{Key: "target_label", Value: "job"},
{Key: "regex", Value: "(.+)"},
{Key: "replacement", Value: "${1}"},
})
}
if ep.Port != "" {
relabelings = append(relabelings, yaml.MapSlice{
{Key: "target_label", Value: "endpoint"},
{Key: "replacement", Value: ep.Port},
})
} else if ep.TargetPort != nil && ep.TargetPort.String() != "" { //nolint:staticcheck // Ignore SA1019 this field is marked as deprecated.
relabelings = append(relabelings, yaml.MapSlice{
{Key: "target_label", Value: "endpoint"},
{Key: "replacement", Value: ep.TargetPort.String()}, //nolint:staticcheck // Ignore SA1019 this field is marked as deprecated.
})
}
rcg := relabelConfigGenerator{
obj: m,
enforcedNamespaceLabel: enforcedNamespaceLabel,
}
relabelings = append(relabelings, rcg.generate(ep.RelabelConfigs)...)
relabelings = generateAddressShardingRelabelingRules(relabelings, shards)
cfg = append(cfg, yaml.MapItem{Key: "relabel_configs", Value: relabelings})
enforcer := limitEnforcer{
logger: logger,
prometheusVersion: version,
}
cfg = enforcer.addLimitsToYAML(cfg, sampleLimitKey, m.Spec.SampleLimit, enforcedSampleLimit)
cfg = enforcer.addLimitsToYAML(cfg, targetLimitKey, m.Spec.TargetLimit, enforcedTargetLimit)
cfg = enforcer.addLimitsToYAML(cfg, labelLimitKey, m.Spec.LabelLimit, enforcedLabelLimit)
cfg = enforcer.addLimitsToYAML(cfg, labelNameLengthLimitKey, m.Spec.LabelNameLengthLimit, enforcedLabelNameLengthLimit)
cfg = enforcer.addLimitsToYAML(cfg, labelValueLengthLimitKey, m.Spec.LabelValueLengthLimit, enforcedLabelValueLengthLimit)
// Since BodySizeLimit is defined only in PrometheusCRD
cfg = enforcer.addBodySizeLimitsToYAML(cfg, enforcedBodySizeLimit)
cfg = append(cfg, yaml.MapItem{Key: "metric_relabel_configs", Value: rcg.generate(ep.MetricRelabelConfigs)})
return cfg
}
func (cg *ConfigGenerator) generateProbeConfig(
version semver.Version,
m *v1.Probe,
apiserverConfig *v1.APIServerConfig,
store *assets.Store,
ignoreHonorLabels bool,
overrideHonorTimestamps bool,
ignoreNamespaceSelectors bool,
enforcedNamespaceLabel string,
enforcedSampleLimit *uint64,
enforcedTargetLimit *uint64,
enforcedLabelLimit *uint64,
enforcedLabelNameLengthLimit *uint64,
enforcedLabelValueLengthLimit *uint64,
enforcedBodySizeLimit string) yaml.MapSlice {
logger := log.With(cg.logger, "probe", m.Name, "namespace", m.Namespace)
jobName := fmt.Sprintf("probe/%s/%s", m.Namespace, m.Name)
cfg := yaml.MapSlice{
{
Key: "job_name",
Value: jobName,
},
}
hTs := true
cfg = honorTimestamps(cfg, &hTs, overrideHonorTimestamps)
path := "/probe"
if m.Spec.ProberSpec.Path != "" {
path = m.Spec.ProberSpec.Path
}
cfg = append(cfg, yaml.MapItem{Key: "metrics_path", Value: path})
if m.Spec.Interval != "" {
cfg = append(cfg, yaml.MapItem{Key: "scrape_interval", Value: m.Spec.Interval})
}
if m.Spec.ScrapeTimeout != "" {
cfg = append(cfg, yaml.MapItem{Key: "scrape_timeout", Value: m.Spec.ScrapeTimeout})
}
if m.Spec.ProberSpec.Scheme != "" {
cfg = append(cfg, yaml.MapItem{Key: "scheme", Value: m.Spec.ProberSpec.Scheme})
}
if m.Spec.ProberSpec.ProxyURL != "" {
cfg = append(cfg, yaml.MapItem{Key: "proxy_url", Value: m.Spec.ProberSpec.ProxyURL})
}
if m.Spec.Module != "" {
cfg = append(cfg, yaml.MapItem{Key: "params", Value: yaml.MapSlice{
{Key: "module", Value: []string{m.Spec.Module}},
}})
}
enforcer := limitEnforcer{
logger: logger,
prometheusVersion: version,
}
cfg = enforcer.addLimitsToYAML(cfg, sampleLimitKey, m.Spec.SampleLimit, enforcedSampleLimit)
cfg = enforcer.addLimitsToYAML(cfg, targetLimitKey, m.Spec.TargetLimit, enforcedTargetLimit)
cfg = enforcer.addLimitsToYAML(cfg, labelLimitKey, m.Spec.LabelLimit, enforcedLabelLimit)
cfg = enforcer.addLimitsToYAML(cfg, labelNameLengthLimitKey, m.Spec.LabelNameLengthLimit, enforcedLabelNameLengthLimit)
cfg = enforcer.addLimitsToYAML(cfg, labelValueLengthLimitKey, m.Spec.LabelValueLengthLimit, enforcedLabelValueLengthLimit)
// Since BodySizeLimit is defined only in PrometheusCRD
cfg = enforcer.addBodySizeLimitsToYAML(cfg, enforcedBodySizeLimit)
relabelings := initRelabelings()
if m.Spec.JobName != "" {
relabelings = append(relabelings, []yaml.MapSlice{
{
{Key: "target_label", Value: "job"},
{Key: "replacement", Value: m.Spec.JobName},
},
}...)
}
rcg := &relabelConfigGenerator{
obj: m,
enforcedNamespaceLabel: enforcedNamespaceLabel,
}
// Generate static_config section.
if m.Spec.Targets.StaticConfig != nil {
staticConfig := yaml.MapSlice{
{Key: "targets", Value: m.Spec.Targets.StaticConfig.Targets},
}
if m.Spec.Targets.StaticConfig.Labels != nil {
if _, ok := m.Spec.Targets.StaticConfig.Labels["namespace"]; !ok {
m.Spec.Targets.StaticConfig.Labels["namespace"] = m.Namespace
}
} else {
m.Spec.Targets.StaticConfig.Labels = map[string]string{"namespace": m.Namespace}
}
staticConfig = append(staticConfig, yaml.MapSlice{
{Key: "labels", Value: m.Spec.Targets.StaticConfig.Labels},
}...)
cfg = append(cfg, yaml.MapItem{
Key: "static_configs",
Value: []yaml.MapSlice{staticConfig},
})
// Relabelings for prober.
relabelings = append(relabelings, []yaml.MapSlice{
{
{Key: "source_labels", Value: []string{"__address__"}},
{Key: "target_label", Value: "__param_target"},
},
{
{Key: "source_labels", Value: []string{"__param_target"}},
{Key: "target_label", Value: "instance"},
},
{
{Key: "target_label", Value: "__address__"},
{Key: "replacement", Value: m.Spec.ProberSpec.URL},
},
}...)
// Add configured relabelings.
relabelings = append(relabelings, rcg.generate(m.Spec.Targets.StaticConfig.RelabelConfigs)...)
cfg = append(cfg, yaml.MapItem{Key: "relabel_configs", Value: relabelings})
}
// Generate kubernetes_sd_config section for ingress resources.
if m.Spec.Targets.StaticConfig == nil {
labelKeys := make([]string, 0, len(m.Spec.Targets.Ingress.Selector.MatchLabels))
// Filter targets by ingresses selected by the monitor.
// Exact label matches.
for k := range m.Spec.Targets.Ingress.Selector.MatchLabels {
labelKeys = append(labelKeys, k)
}
sort.Strings(labelKeys)
for _, k := range labelKeys {
relabelings = append(relabelings, yaml.MapSlice{
{Key: "action", Value: "keep"},
{Key: "source_labels", Value: []string{"__meta_kubernetes_ingress_label_" + sanitizeLabelName(k)}},
{Key: "regex", Value: m.Spec.Targets.Ingress.Selector.MatchLabels[k]},
})
}
// Set based label matching. We have to map the valid relations
// `In`, `NotIn`, `Exists`, and `DoesNotExist`, into relabeling rules.
for _, exp := range m.Spec.Targets.Ingress.Selector.MatchExpressions {
switch exp.Operator {
case metav1.LabelSelectorOpIn:
relabelings = append(relabelings, yaml.MapSlice{
{Key: "action", Value: "keep"},
{Key: "source_labels", Value: []string{"__meta_kubernetes_ingress_label_" + sanitizeLabelName(exp.Key)}},
{Key: "regex", Value: strings.Join(exp.Values, "|")},
})
case metav1.LabelSelectorOpNotIn:
relabelings = append(relabelings, yaml.MapSlice{
{Key: "action", Value: "drop"},
{Key: "source_labels", Value: []string{"__meta_kubernetes_ingress_label_" + sanitizeLabelName(exp.Key)}},
{Key: "regex", Value: strings.Join(exp.Values, "|")},
})
case metav1.LabelSelectorOpExists:
relabelings = append(relabelings, yaml.MapSlice{
{Key: "action", Value: "keep"},
{Key: "source_labels", Value: []string{"__meta_kubernetes_ingress_labelpresent_" + sanitizeLabelName(exp.Key)}},
{Key: "regex", Value: "true"},
})
case metav1.LabelSelectorOpDoesNotExist:
relabelings = append(relabelings, yaml.MapSlice{
{Key: "action", Value: "drop"},
{Key: "source_labels", Value: []string{"__meta_kubernetes_ingress_labelpresent_" + sanitizeLabelName(exp.Key)}},
{Key: "regex", Value: "true"},
})
}
}
selectedNamespaces := getNamespacesFromNamespaceSelector(&m.Spec.Targets.Ingress.NamespaceSelector, m.Namespace, ignoreNamespaceSelectors)
cfg = append(cfg, cg.generateK8SSDConfig(version, selectedNamespaces, apiserverConfig, store, kubernetesSDRoleIngress))
// Relabelings for ingress SD.
relabelings = append(relabelings, []yaml.MapSlice{
{
{Key: "source_labels", Value: []string{"__meta_kubernetes_ingress_scheme", "__address__", "__meta_kubernetes_ingress_path"}},
{Key: "separator", Value: ";"},
{Key: "regex", Value: "(.+);(.+);(.+)"},
{Key: "target_label", Value: "__param_target"},
{Key: "replacement", Value: "${1}://${2}${3}"},
{Key: "action", Value: "replace"},
},
{
{Key: "source_labels", Value: []string{"__meta_kubernetes_namespace"}},
{Key: "target_label", Value: "namespace"},
},
{
{Key: "source_labels", Value: []string{"__meta_kubernetes_ingress_name"}},
{Key: "target_label", Value: "ingress"},
},
}...)
// Relabelings for prober.
relabelings = append(relabelings, []yaml.MapSlice{
{
{Key: "source_labels", Value: []string{"__param_target"}},
{Key: "target_label", Value: "instance"},
},
{
{Key: "target_label", Value: "__address__"},
{Key: "replacement", Value: m.Spec.ProberSpec.URL},
},
}...)
// Add configured relabelings.
rcg := &relabelConfigGenerator{
obj: m,
enforcedNamespaceLabel: enforcedNamespaceLabel,
}
relabelings = append(relabelings, rcg.generate(m.Spec.Targets.Ingress.RelabelConfigs)...)
cfg = append(cfg, yaml.MapItem{Key: "relabel_configs", Value: relabelings})
}
if m.Spec.TLSConfig != nil {
cfg = addSafeTLStoYaml(cfg, m.Namespace, m.Spec.TLSConfig.SafeTLSConfig)
}
if m.Spec.BearerTokenSecret.Name != "" {
pnKey := fmt.Sprintf("probe/%s/%s", m.GetNamespace(), m.GetName())
if s, ok := store.TokenAssets[pnKey]; ok {
cfg = append(cfg, yaml.MapItem{Key: "bearer_token", Value: s})
}
}
if m.Spec.BasicAuth != nil {
if s, ok := store.BasicAuthAssets[fmt.Sprintf("probe/%s/%s", m.Namespace, m.Name)]; ok {
cfg = append(cfg, yaml.MapItem{
Key: "basic_auth", Value: yaml.MapSlice{
{Key: "username", Value: s.Username},
{Key: "password", Value: s.Password},
},
})
}
}
assetKey := fmt.Sprintf("probe/%s/%s", m.Namespace, m.Name)
cfg = addOAuth2ToYaml(cfg, version, m.Spec.OAuth2, store.OAuth2Assets, assetKey)
cfg = addSafeAuthorizationToYaml(cfg, version, fmt.Sprintf("probe/auth/%s/%s", m.Namespace, m.Name), store, m.Spec.Authorization, logger)
cfg = append(cfg, yaml.MapItem{Key: "metric_relabel_configs", Value: rcg.generate(m.Spec.MetricRelabelConfigs)})
return cfg
}
func (cg *ConfigGenerator) generateServiceMonitorConfig(
version semver.Version,
m *v1.ServiceMonitor,
ep v1.Endpoint,
i int,
apiserverConfig *v1.APIServerConfig,
store *assets.Store,