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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 (
"context"
"fmt"
"path"
"reflect"
"regexp"
"sort"
"strings"
"github.com/alecthomas/units"
"github.com/blang/semver/v4"
"github.com/go-kit/log"
"github.com/go-kit/log/level"
"github.com/prometheus/common/model"
"gopkg.in/yaml.v2"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/utils/ptr"
monitoringv1 "github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring/v1"
monitoringv1alpha1 "github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring/v1alpha1"
"github.com/prometheus-operator/prometheus-operator/pkg/assets"
namespacelabeler "github.com/prometheus-operator/prometheus-operator/pkg/namespacelabeler"
"github.com/prometheus-operator/prometheus-operator/pkg/operator"
)
const (
kubernetesSDRoleEndpoint = "endpoints"
kubernetesSDRoleEndpointSlice = "endpointslice"
kubernetesSDRolePod = "pod"
kubernetesSDRoleIngress = "ingress"
defaultPrometheusExternalLabelName = "prometheus"
defaultReplicaExternalLabelName = "prometheus_replica"
)
var invalidLabelCharRE = regexp.MustCompile(`[^a-zA-Z0-9_]`)
func sanitizeLabelName(name string) string {
return invalidLabelCharRE.ReplaceAllString(name, "_")
}
// ConfigGenerator knows how to generate a Prometheus configuration which is
// compatible with a given Prometheus version.
type ConfigGenerator struct {
logger log.Logger
version semver.Version
notCompatible bool
prom monitoringv1.PrometheusInterface
endpointSliceSupported bool
scrapeClasses map[string]*monitoringv1.ScrapeClass
defaultScrapeClassName string
}
// NewConfigGenerator creates a ConfigGenerator for the provided Prometheus resource.
func NewConfigGenerator(logger log.Logger, p monitoringv1.PrometheusInterface, endpointSliceSupported bool) (*ConfigGenerator, error) {
if logger == nil {
logger = log.NewNopLogger()
}
cpf := p.GetCommonPrometheusFields()
promVersion := operator.StringValOrDefault(cpf.Version, operator.DefaultPrometheusVersion)
version, err := semver.ParseTolerant(promVersion)
if err != nil {
return nil, fmt.Errorf("failed to parse Prometheus version: %w", err)
}
if version.Major != 2 {
return nil, fmt.Errorf("unsupported Prometheus major version %s: %w", version, err)
}
logger = log.WithSuffix(logger, "version", promVersion)
scrapeClasses, defaultScrapeClassName, err := getScrapeClassConfig(p)
if err != nil {
return nil, fmt.Errorf("failed to parse scrape classes: %w", err)
}
return &ConfigGenerator{
logger: logger,
version: version,
prom: p,
endpointSliceSupported: endpointSliceSupported,
scrapeClasses: scrapeClasses,
defaultScrapeClassName: defaultScrapeClassName,
}, nil
}
func getScrapeClassConfig(p monitoringv1.PrometheusInterface) (map[string]*monitoringv1.ScrapeClass, string, error) {
cpf := p.GetCommonPrometheusFields()
scrapeClasses := make(map[string]*monitoringv1.ScrapeClass, len(cpf.ScrapeClasses))
defaultScrapeClass := ""
for _, scrapeClass := range cpf.ScrapeClasses {
scrapeClasses[scrapeClass.Name] = &scrapeClass
// Validate all scrape class relabelings are correct.
if err := validateRelabelConfigs(p, scrapeClass.Relabelings); err != nil {
return nil, "", fmt.Errorf("invalid relabelings for scrapeClass %s: %w", scrapeClass.Name, err)
}
if ptr.Deref(scrapeClass.Default, false) {
if defaultScrapeClass == "" {
defaultScrapeClass = scrapeClass.Name
continue
}
return nil, "", fmt.Errorf("multiple default scrape classes defined")
}
}
return scrapeClasses, defaultScrapeClass, nil
}
// WithKeyVals returns a new ConfigGenerator with the same characteristics as
// the current object, expect that the keyvals are appended to the existing
// logger.
func (cg *ConfigGenerator) WithKeyVals(keyvals ...interface{}) *ConfigGenerator {
return &ConfigGenerator{
logger: log.WithSuffix(cg.logger, keyvals...),
version: cg.version,
notCompatible: cg.notCompatible,
prom: cg.prom,
endpointSliceSupported: cg.endpointSliceSupported,
scrapeClasses: cg.scrapeClasses,
defaultScrapeClassName: cg.defaultScrapeClassName,
}
}
// WithMinimumVersion returns a new ConfigGenerator that does nothing (except
// logging a warning message) if the Prometheus version is lesser than the
// given version.
// The method panics if version isn't a valid SemVer value.
func (cg *ConfigGenerator) WithMinimumVersion(version string) *ConfigGenerator {
minVersion := semver.MustParse(version)
if cg.version.LT(minVersion) {
return &ConfigGenerator{
logger: log.WithSuffix(cg.logger, "minimum_version", version),
version: cg.version,
notCompatible: true,
prom: cg.prom,
endpointSliceSupported: cg.endpointSliceSupported,
scrapeClasses: cg.scrapeClasses,
defaultScrapeClassName: cg.defaultScrapeClassName,
}
}
return cg
}
// WithMaximumVersion returns a new ConfigGenerator that does nothing (except
// logging a warning message) if the Prometheus version is greater than or
// equal to the given version.
// The method panics if version isn't a valid SemVer value.
func (cg *ConfigGenerator) WithMaximumVersion(version string) *ConfigGenerator {
minVersion := semver.MustParse(version)
if cg.version.GTE(minVersion) {
return &ConfigGenerator{
logger: log.WithSuffix(cg.logger, "maximum_version", version),
version: cg.version,
notCompatible: true,
prom: cg.prom,
endpointSliceSupported: cg.endpointSliceSupported,
scrapeClasses: cg.scrapeClasses,
defaultScrapeClassName: cg.defaultScrapeClassName,
}
}
return cg
}
// AppendMapItem appends the k/v item to the given yaml.MapSlice and returns
// the updated slice.
func (cg *ConfigGenerator) AppendMapItem(m yaml.MapSlice, k string, v interface{}) yaml.MapSlice {
if cg.notCompatible {
cg.Warn(k)
return m
}
return append(m, yaml.MapItem{Key: k, Value: v})
}
// AppendCommandlineArgument appends the name/v argument to the given []monitoringv1.Argument and returns
// the updated slice.
func (cg *ConfigGenerator) AppendCommandlineArgument(m []monitoringv1.Argument, argument monitoringv1.Argument) []monitoringv1.Argument {
if cg.notCompatible {
level.Warn(cg.logger).Log("msg", fmt.Sprintf("ignoring command line argument %q not supported by Prometheus", argument.Name))
return m
}
return append(m, argument)
}
// IsCompatible return true or false depending if the version being used is compatible.
func (cg *ConfigGenerator) IsCompatible() bool {
return !cg.notCompatible
}
// Warn logs a warning.
func (cg *ConfigGenerator) Warn(field string) {
level.Warn(cg.logger).Log("msg", fmt.Sprintf("ignoring %q not supported by Prometheus", field))
}
type limitKey struct {
specField string
prometheusField string
minVersion string
}
var (
sampleLimitKey = limitKey{
specField: "sampleLimit",
prometheusField: "sample_limit",
}
targetLimitKey = limitKey{
specField: "targetLimit",
prometheusField: "target_limit",
minVersion: "2.21.0",
}
labelLimitKey = limitKey{
specField: "labelLimit",
prometheusField: "label_limit",
minVersion: "2.27.0",
}
labelNameLengthLimitKey = limitKey{
specField: "labelNameLengthLimit",
prometheusField: "label_name_length_limit",
minVersion: "2.27.0",
}
labelValueLengthLimitKey = limitKey{
specField: "labelValueLengthLimit",
prometheusField: "label_value_length_limit",
minVersion: "2.27.0",
}
keepDroppedTargetsKey = limitKey{
specField: "keepDroppedTargets",
prometheusField: "keep_dropped_targets",
minVersion: "2.47.0",
}
)
// AddLimitsToYAML appends the given limit key to the configuration if
// supported by the Prometheus version.
func (cg *ConfigGenerator) AddLimitsToYAML(cfg yaml.MapSlice, k limitKey, limit *uint64, enforcedLimit *uint64) yaml.MapSlice {
finalLimit := getLimit(limit, enforcedLimit)
if finalLimit == nil {
return cfg
}
if k.minVersion == "" {
return cg.AppendMapItem(cfg, k.prometheusField, finalLimit)
}
return cg.WithMinimumVersion(k.minVersion).AppendMapItem(cfg, k.prometheusField, finalLimit)
}
// AddHonorTimestamps adds the honor_timestamps field into scrape configurations.
// honor_timestamps is false only when the user specified it or when the global
// override applies.
// For backwards compatibility with Prometheus <2.9.0 we don't set
// honor_timestamps.
func (cg *ConfigGenerator) AddHonorTimestamps(cfg yaml.MapSlice, userHonorTimestamps *bool) yaml.MapSlice {
cpf := cg.prom.GetCommonPrometheusFields()
// Fast path.
if userHonorTimestamps == nil && !cpf.OverrideHonorTimestamps {
return cfg
}
honor := false
if userHonorTimestamps != nil {
honor = *userHonorTimestamps
}
return cg.WithMinimumVersion("2.9.0").AppendMapItem(cfg, "honor_timestamps", honor && !cpf.OverrideHonorTimestamps)
}
// AddTrackTimestampsStaleness adds the track_timestamps_staleness field into scrape configurations.
// For backwards compatibility with Prometheus <2.48.0 we don't set
// track_timestamps_staleness.
func (cg *ConfigGenerator) AddTrackTimestampsStaleness(cfg yaml.MapSlice, trackTimestampsStaleness *bool) yaml.MapSlice {
// Fast path.
if trackTimestampsStaleness == nil {
return cfg
}
return cg.WithMinimumVersion("2.48.0").AppendMapItem(cfg, "track_timestamps_staleness", *trackTimestampsStaleness)
}
// AddScrapeProtocols adds the scrape_protocols field into scrape configurations.
// For backwards compatibility with Prometheus <2.49.0 we don't set scrape_protocols.
func (cg *ConfigGenerator) AddScrapeProtocols(cfg yaml.MapSlice, scrapeProtocols []monitoringv1.ScrapeProtocol) yaml.MapSlice {
if len(scrapeProtocols) == 0 {
return cfg
}
return cg.WithMinimumVersion("2.49.0").AppendMapItem(cfg, "scrape_protocols", scrapeProtocols)
}
// AddHonorLabels adds the honor_labels field into scrape configurations.
// if OverrideHonorLabels is true then honor_labels is always false.
func (cg *ConfigGenerator) AddHonorLabels(cfg yaml.MapSlice, honorLabels bool) yaml.MapSlice {
if cg.prom.GetCommonPrometheusFields().OverrideHonorLabels {
honorLabels = false
}
return cg.AppendMapItem(cfg, "honor_labels", honorLabels)
}
func (cg *ConfigGenerator) EndpointSliceSupported() bool {
return cg.version.GTE(semver.MustParse("2.21.0")) && cg.endpointSliceSupported
}
// stringMapToMapSlice returns a yaml.MapSlice from a string map to ensure that
// the output is deterministic.
func stringMapToMapSlice[V any](m map[string]V) yaml.MapSlice {
res := yaml.MapSlice{}
ks := make([]string, 0, len(m))
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 monitoringv1.SafeTLSConfig) yaml.MapSlice {
pathForSelector := func(sel monitoringv1.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(monitoringv1.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 *monitoringv1.TLSConfig) yaml.MapSlice {
if tls == nil {
return cfg
}
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 (cg *ConfigGenerator) MergeTLSConfigWithScrapeClass(tlsConfig *monitoringv1.TLSConfig, scrapeClass *monitoringv1.ScrapeClass) *monitoringv1.TLSConfig {
scrapeClassName := cg.defaultScrapeClassName
if scrapeClass != nil {
scrapeClassName = scrapeClass.Name
}
scrapeClass, found := cg.scrapeClasses[scrapeClassName]
if !found {
return tlsConfig
}
if tlsConfig == nil && !found {
return nil
}
if tlsConfig != nil && !found {
return tlsConfig
}
if tlsConfig == nil && found {
return scrapeClass.TLSConfig
}
if tlsConfig.CAFile == "" && tlsConfig.SafeTLSConfig.CA == (monitoringv1.SecretOrConfigMap{}) {
tlsConfig.CAFile = scrapeClass.TLSConfig.CAFile
}
if tlsConfig.CertFile == "" && tlsConfig.SafeTLSConfig.Cert == (monitoringv1.SecretOrConfigMap{}) {
tlsConfig.CertFile = scrapeClass.TLSConfig.CertFile
}
if tlsConfig.KeyFile == "" && tlsConfig.SafeTLSConfig.KeySecret == nil {
tlsConfig.KeyFile = scrapeClass.TLSConfig.KeyFile
}
return tlsConfig
}
func (cg *ConfigGenerator) addBasicAuthToYaml(cfg yaml.MapSlice,
assetStoreKey string,
store *assets.Store,
basicAuth *monitoringv1.BasicAuth,
) yaml.MapSlice {
if basicAuth == nil {
return cfg
}
var authCfg assets.BasicAuthCredentials
if s, ok := store.BasicAuthAssets[assetStoreKey]; ok {
authCfg = s
}
return cg.WithKeyVals("component", strings.Split(assetStoreKey, "/")[0]).AppendMapItem(cfg, "basic_auth", authCfg)
}
func (cg *ConfigGenerator) addSigv4ToYaml(cfg yaml.MapSlice,
assetStoreKey string,
store *assets.Store,
sigv4 *monitoringv1.Sigv4,
) yaml.MapSlice {
if sigv4 == nil {
return cfg
}
sigv4Cfg := yaml.MapSlice{}
if sigv4.Region != "" {
sigv4Cfg = append(sigv4Cfg, yaml.MapItem{Key: "region", Value: sigv4.Region})
}
if store.SigV4Assets[assetStoreKey].AccessKeyID != "" {
sigv4Cfg = append(sigv4Cfg, yaml.MapItem{Key: "access_key", Value: store.SigV4Assets[assetStoreKey].AccessKeyID})
}
if store.SigV4Assets[assetStoreKey].SecretKeyID != "" {
sigv4Cfg = append(sigv4Cfg, yaml.MapItem{Key: "secret_key", Value: store.SigV4Assets[assetStoreKey].SecretKeyID})
}
if sigv4.Profile != "" {
sigv4Cfg = append(sigv4Cfg, yaml.MapItem{Key: "profile", Value: sigv4.Profile})
}
if sigv4.RoleArn != "" {
sigv4Cfg = append(sigv4Cfg, yaml.MapItem{Key: "role_arn", Value: sigv4.RoleArn})
}
return cg.WithKeyVals("component", strings.Split(assetStoreKey, "/")[0]).AppendMapItem(cfg, "sigv4", sigv4Cfg)
}
func (cg *ConfigGenerator) addSafeAuthorizationToYaml(
cfg yaml.MapSlice,
assetStoreKey string,
store *assets.Store,
auth *monitoringv1.SafeAuthorization,
) yaml.MapSlice {
if auth == nil {
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})
}
}
// extract current cfg section from assetStoreKey, assuming
// "<component>/something..."
return cg.WithMinimumVersion("2.26.0").WithKeyVals("component", strings.Split(assetStoreKey, "/")[0]).AppendMapItem(cfg, "authorization", authCfg)
}
func (cg *ConfigGenerator) addAuthorizationToYaml(
cfg yaml.MapSlice,
assetStoreKey string,
store *assets.Store,
auth *monitoringv1.Authorization,
) yaml.MapSlice {
if auth == nil {
return cfg
}
// reuse addSafeAuthorizationToYaml and unpack the part we're interested
// in, namely the value under the "authorization" key
authCfg := cg.addSafeAuthorizationToYaml(yaml.MapSlice{}, assetStoreKey, store, &auth.SafeAuthorization)[0].Value.(yaml.MapSlice)
if auth.CredentialsFile != "" {
authCfg = append(authCfg, yaml.MapItem{Key: "credentials_file", Value: auth.CredentialsFile})
}
return cg.WithMinimumVersion("2.26.0").WithKeyVals("component", strings.Split(assetStoreKey, "/")[0]).AppendMapItem(cfg, "authorization", authCfg)
}
func (cg *ConfigGenerator) buildExternalLabels() yaml.MapSlice {
m := map[string]string{}
cpf := cg.prom.GetCommonPrometheusFields()
objMeta := cg.prom.GetObjectMeta()
prometheusExternalLabelName := defaultPrometheusExternalLabelName
if cpf.PrometheusExternalLabelName != nil {
prometheusExternalLabelName = *cpf.PrometheusExternalLabelName
}
// Do not add the external label if the resulting value is empty.
if prometheusExternalLabelName != "" {
m[prometheusExternalLabelName] = fmt.Sprintf("%s/%s", objMeta.GetNamespace(), objMeta.GetName())
}
replicaExternalLabelName := defaultReplicaExternalLabelName
if cpf.ReplicaExternalLabelName != nil {
replicaExternalLabelName = *cpf.ReplicaExternalLabelName
}
// Do not add the external label if the resulting value is empty.
if replicaExternalLabelName != "" {
m[replicaExternalLabelName] = fmt.Sprintf("$(%s)", operator.PodNameEnvVar)
}
for k, v := range cpf.ExternalLabels {
if _, found := m[k]; found {
level.Warn(cg.logger).Log("msg", "ignoring external label because it is a reserved key", "key", k)
continue
}
m[k] = v
}
return stringMapToMapSlice(m)
}
func (cg *ConfigGenerator) addProxyConfigtoYaml(
ctx context.Context,
cfg yaml.MapSlice,
namespace string,
store *assets.Store,
proxyConfig monitoringv1.ProxyConfig,
) yaml.MapSlice {
if reflect.ValueOf(proxyConfig).IsZero() {
return cfg
}
var cgProxyConfig = cg.WithMinimumVersion("2.43.0")
if proxyConfig.ProxyURL != nil {
cfg = cgProxyConfig.AppendMapItem(cfg, "proxy_url", *proxyConfig.ProxyURL)
}
if proxyConfig.NoProxy != nil {
cfg = cgProxyConfig.AppendMapItem(cfg, "no_proxy", *proxyConfig.NoProxy)
}
if proxyConfig.ProxyFromEnvironment != nil {
cfg = cgProxyConfig.AppendMapItem(cfg, "proxy_from_environment", *proxyConfig.ProxyFromEnvironment)
}
if proxyConfig.ProxyConnectHeader != nil {
proxyConnectHeader := make(map[string]string, len(proxyConfig.ProxyConnectHeader))
for k, v := range proxyConfig.ProxyConnectHeader {
value, _ := store.GetKey(ctx, namespace, monitoringv1.SecretOrConfigMap{
Secret: &v,
})
proxyConnectHeader[k] = value
}
cfg = cgProxyConfig.AppendMapItem(cfg, "proxy_connect_header", stringMapToMapSlice(proxyConnectHeader))
}
return cfg
}
// CompareScrapeTimeoutToScrapeInterval validates value of scrapeTimeout based on scrapeInterval.
func CompareScrapeTimeoutToScrapeInterval(scrapeTimeout, scrapeInterval monitoringv1.Duration) error {
var si, st model.Duration
var err error
if si, err = model.ParseDuration(string(scrapeInterval)); err != nil {
return fmt.Errorf("invalid scrapeInterval %q: %w", scrapeInterval, err)
}
if st, err = model.ParseDuration(string(scrapeTimeout)); err != nil {
return fmt.Errorf("invalid scrapeTimeout: %q: %w", scrapeTimeout, err)
}
if st > si {
return fmt.Errorf("scrapeTimeout %q greater than scrapeInterval %q", scrapeTimeout, scrapeInterval)
}
return nil
}
// GenerateServerConfiguration creates a serialized YAML representation of a Prometheus Server configuration using the provided resources.
func (cg *ConfigGenerator) GenerateServerConfiguration(
ctx context.Context,
evaluationInterval monitoringv1.Duration,
queryLogFile string,
ruleSelector *metav1.LabelSelector,
exemplars *monitoringv1.Exemplars,
tsdb monitoringv1.TSDBSpec,
alerting *monitoringv1.AlertingSpec,
remoteRead []monitoringv1.RemoteReadSpec,
sMons map[string]*monitoringv1.ServiceMonitor,
pMons map[string]*monitoringv1.PodMonitor,
probes map[string]*monitoringv1.Probe,
sCons map[string]*monitoringv1alpha1.ScrapeConfig,
store *assets.Store,
additionalScrapeConfigs []byte,
additionalAlertRelabelConfigs []byte,
additionalAlertManagerConfigs []byte,
ruleConfigMapNames []string,
) ([]byte, error) {
cpf := cg.prom.GetCommonPrometheusFields()
// validates the value of scrapeTimeout based on scrapeInterval
if cpf.ScrapeTimeout != "" {
if err := CompareScrapeTimeoutToScrapeInterval(cpf.ScrapeTimeout, cpf.ScrapeInterval); err != nil {
return nil, err
}
}
// Global config
cfg := yaml.MapSlice{}
globalItems := yaml.MapSlice{}
globalItems = cg.appendEvaluationInterval(globalItems, evaluationInterval)
globalItems = cg.appendScrapeIntervals(globalItems)
globalItems = cg.appendScrapeProtocols(globalItems)
globalItems = cg.appendExternalLabels(globalItems)
globalItems = cg.appendQueryLogFile(globalItems, queryLogFile)
globalItems = cg.appendScrapeLimits(globalItems)
cfg = append(cfg, yaml.MapItem{Key: "global", Value: globalItems})
// Rule Files config
cfg = cg.appendRuleFiles(cfg, ruleConfigMapNames, ruleSelector)
// Scrape config
var (
scrapeConfigs []yaml.MapSlice
apiserverConfig = cpf.APIServerConfig
shards = shardsNumber(cg.prom)
)
scrapeConfigs = cg.appendServiceMonitorConfigs(scrapeConfigs, sMons, apiserverConfig, store, shards)
scrapeConfigs = cg.appendPodMonitorConfigs(scrapeConfigs, pMons, apiserverConfig, store, shards)
scrapeConfigs = cg.appendProbeConfigs(scrapeConfigs, probes, apiserverConfig, store, shards)
scrapeConfigs, err := cg.appendScrapeConfigs(ctx, scrapeConfigs, sCons, store, shards)
if err != nil {
return nil, fmt.Errorf("generate scrape configs: %w", err)
}
scrapeConfigs, err = cg.appendAdditionalScrapeConfigs(scrapeConfigs, additionalScrapeConfigs, shards)
if err != nil {
return nil, fmt.Errorf("generate additional scrape configs: %w", err)
}
cfg = append(cfg, yaml.MapItem{
Key: "scrape_configs",
Value: scrapeConfigs,
})
// Storage config
cfg, err = cg.appendStorageSettingsConfig(cfg, exemplars, tsdb)
if err != nil {
return nil, fmt.Errorf("generating storage_settings configuration failed: %w", err)
}
// Alerting config
cfg, err = cg.appendAlertingConfig(cfg, alerting, additionalAlertRelabelConfigs, additionalAlertManagerConfigs, store)
if err != nil {
return nil, fmt.Errorf("generating alerting configuration failed: %w", err)
}
// Remote write config
if len(cpf.RemoteWrite) > 0 {
cfg = append(cfg, cg.generateRemoteWriteConfig(store))
}
// Remote read config
if len(remoteRead) > 0 {
cfg = append(cfg, cg.generateRemoteReadConfig(remoteRead, store))
}
if cpf.TracingConfig != nil {
tracingcfg, err := cg.generateTracingConfig()
if err != nil {
return nil, fmt.Errorf("generating tracing configuration failed: %w", err)
}
cfg = append(cfg, tracingcfg)
}
return yaml.Marshal(cfg)
}
func (cg *ConfigGenerator) appendStorageSettingsConfig(cfg yaml.MapSlice, exemplars *monitoringv1.Exemplars, tsdb monitoringv1.TSDBSpec) (yaml.MapSlice, error) {
var (
storage yaml.MapSlice
cgStorage = cg.WithMinimumVersion("2.29.0")
)
if exemplars != nil && exemplars.MaxSize != nil {
storage = cgStorage.AppendMapItem(storage, "exemplars", yaml.MapSlice{
{
Key: "max_exemplars",
Value: *exemplars.MaxSize,
},
})
}
if tsdb.OutOfOrderTimeWindow != "" {
storage = cg.WithMinimumVersion("2.39.0").AppendMapItem(storage, "tsdb", yaml.MapSlice{
{
Key: "out_of_order_time_window",
Value: tsdb.OutOfOrderTimeWindow,
},
})
}
if len(storage) == 0 {
return cfg, nil
}
return cgStorage.AppendMapItem(cfg, "storage", storage), nil
}
func (cg *ConfigGenerator) appendAlertingConfig(
cfg yaml.MapSlice,
alerting *monitoringv1.AlertingSpec,
additionalAlertRelabelConfigs []byte,
additionalAlertmanagerConfigs []byte,
store *assets.Store,
) (yaml.MapSlice, error) {
if alerting == nil && additionalAlertRelabelConfigs == nil && additionalAlertmanagerConfigs == nil {
return cfg, nil
}
cpf := cg.prom.GetCommonPrometheusFields()
alertmanagerConfigs := cg.generateAlertmanagerConfig(alerting, cpf.APIServerConfig, store)
var additionalAlertmanagerConfigsYaml []yaml.MapSlice
if err := yaml.Unmarshal(additionalAlertmanagerConfigs, &additionalAlertmanagerConfigsYaml); err != nil {
return nil, fmt.Errorf("unmarshalling additional alertmanager configs failed")
}
alertmanagerConfigs = append(alertmanagerConfigs, additionalAlertmanagerConfigsYaml...)
var alertRelabelConfigs []yaml.MapSlice
replicaExternalLabelName := defaultReplicaExternalLabelName
if cpf.ReplicaExternalLabelName != nil {
replicaExternalLabelName = *cpf.ReplicaExternalLabelName
}
if replicaExternalLabelName != "" {
// Drop the replica label to enable proper deduplication on the Alertmanager side.
alertRelabelConfigs = append(alertRelabelConfigs, yaml.MapSlice{
{Key: "action", Value: "labeldrop"},
{Key: "regex", Value: regexp.QuoteMeta(replicaExternalLabelName)},
})
}
var additionalAlertRelabelConfigsYaml []yaml.MapSlice
if err := yaml.Unmarshal(additionalAlertRelabelConfigs, &additionalAlertRelabelConfigsYaml); err != nil {
return nil, fmt.Errorf("unmarshalling additional alerting relabel configs failed: %w", err)
}
alertRelabelConfigs = append(alertRelabelConfigs, additionalAlertRelabelConfigsYaml...)
return append(cfg, yaml.MapItem{
Key: "alerting",
Value: yaml.MapSlice{
{
Key: "alert_relabel_configs",
Value: alertRelabelConfigs,
},
{
Key: "alertmanagers",
Value: alertmanagerConfigs,
},
},
}), nil
}
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(
m *monitoringv1.PodMonitor,
ep monitoringv1.PodMetricsEndpoint,
i int, apiserverConfig *monitoringv1.APIServerConfig,
store *assets.Store,
shards int32,
) yaml.MapSlice {
scrapeClass := cg.getScrapeClassOrDefault(m.Spec.ScrapeClassName)
cfg := yaml.MapSlice{
{
Key: "job_name",
Value: fmt.Sprintf("podMonitor/%s/%s/%d", m.Namespace, m.Name, i),
},
}
cfg = cg.AddHonorLabels(cfg, ep.HonorLabels)
cfg = cg.AddHonorTimestamps(cfg, ep.HonorTimestamps)
cfg = cg.AddTrackTimestampsStaleness(cfg, ep.TrackTimestampsStaleness)
var attachMetaConfig *attachMetadataConfig
if m.Spec.AttachMetadata != nil {
attachMetaConfig = &attachMetadataConfig{
MinimumVersion: "2.35.0",
AttachMetadata: m.Spec.AttachMetadata,
}
}
cfg = append(cfg, cg.generateK8SSDConfig(m.Spec.NamespaceSelector, m.Namespace, apiserverConfig, store, kubernetesSDRolePod, attachMetaConfig))
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.FollowRedirects != nil {
cfg = cg.WithMinimumVersion("2.26.0").AppendMapItem(cfg, "follow_redirects", *ep.FollowRedirects)
}
if ep.EnableHttp2 != nil {
cfg = cg.WithMinimumVersion("2.35.0").AppendMapItem(cfg, "enable_http2", *ep.EnableHttp2)
}
if ep.TLSConfig != nil {
tlsConfig := &monitoringv1.TLSConfig{SafeTLSConfig: *ep.TLSConfig}
mergedTLSConfig := cg.MergeTLSConfigWithScrapeClass(tlsConfig, scrapeClass)
cfg = addTLStoYaml(cfg, m.Namespace, mergedTLSConfig)
}
//nolint:staticcheck // Ignore SA1019 this field is marked as deprecated.
if ep.BearerTokenSecret.Name != "" {
level.Debug(cg.logger).Log("msg", "'bearerTokenSecret' is deprecated, use 'authorization' instead.")
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})
}
}
cfg = cg.addBasicAuthToYaml(cfg, fmt.Sprintf("podMonitor/%s/%s/%d", m.Namespace, m.Name, i), store, ep.BasicAuth)
assetKey := fmt.Sprintf("podMonitor/%s/%s/%d", m.Namespace, m.Name, i)
cfg = cg.addOAuth2ToYaml(cfg, ep.OAuth2, store.OAuth2Assets, assetKey)
cfg = cg.addSafeAuthorizationToYaml(cfg, fmt.Sprintf("podMonitor/auth/%s/%s/%d", m.Namespace, m.Name, i), store, ep.Authorization)
relabelings := initRelabelings()
if ep.FilterRunning == nil || *ep.FilterRunning {
relabelings = append(relabelings, generateRunningFilter())
}
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), "__meta_kubernetes_pod_labelpresent_" + sanitizeLabelName(k)}},
{Key: "regex", Value: fmt.Sprintf("(%s);true", 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), "__meta_kubernetes_pod_labelpresent_" + sanitizeLabelName(exp.Key)}},
{Key: "regex", Value: fmt.Sprintf("(%s);true", 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), "__meta_kubernetes_pod_labelpresent_" + sanitizeLabelName(exp.Key)}},
{Key: "regex", Value: fmt.Sprintf("(%s);true", 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(cg.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.
cpf := cg.prom.GetCommonPrometheusFields()
for _, l := range append(m.Spec.PodTargetLabels, cpf.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