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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 (
"cmp"
"fmt"
"log/slog"
"math"
"net/url"
"os"
"path"
"reflect"
"regexp"
"slices"
"strings"
"github.com/alecthomas/units"
"github.com/blang/semver/v4"
"github.com/prometheus/common/model"
"gopkg.in/yaml.v2"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/intstr"
"k8s.io/utils/ptr"
"github.com/prometheus-operator/prometheus-operator/internal/util"
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 *slog.Logger
version semver.Version
notCompatible bool
prom monitoringv1.PrometheusInterface
useEndpointSlice bool // Whether to use EndpointSlice for service discovery from `ServiceMonitor` objects.
scrapeClasses map[string]monitoringv1.ScrapeClass
defaultScrapeClassName string
daemonSet bool
}
type ConfigGeneratorOption func(*ConfigGenerator)
func WithEndpointSliceSupport() ConfigGeneratorOption {
return func(cg *ConfigGenerator) {
cpf := cg.prom.GetCommonPrometheusFields()
cg.useEndpointSlice = ptr.Deref(cpf.ServiceDiscoveryRole, monitoringv1.EndpointsRole) == monitoringv1.EndpointSliceRole
}
}
func WithDaemonSet() ConfigGeneratorOption {
return func(cg *ConfigGenerator) {
cg.daemonSet = true
}
}
// NewConfigGenerator creates a ConfigGenerator for the provided Prometheus resource.
func NewConfigGenerator(
logger *slog.Logger,
p monitoringv1.PrometheusInterface,
opts ...ConfigGeneratorOption,
) (*ConfigGenerator, error) {
if logger == nil {
logger = slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{
// slog level math.MaxInt means no logging
// We would like to use the slog buil-in No-op level once it is available
// More: https://github.com/golang/go/issues/62005
Level: slog.Level(math.MaxInt),
}))
}
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 && version.Major != 3 {
return nil, fmt.Errorf("unsupported Prometheus version %q", promVersion)
}
logger = logger.With("version", promVersion)
scrapeClasses, defaultScrapeClassName, err := getScrapeClassConfig(p)
if err != nil {
return nil, fmt.Errorf("failed to parse scrape classes: %w", err)
}
cg := &ConfigGenerator{
logger: logger,
version: version,
prom: p,
scrapeClasses: scrapeClasses,
defaultScrapeClassName: defaultScrapeClassName,
}
for _, opt := range opts {
opt(cg)
}
return cg, nil
}
func (cg *ConfigGenerator) endpointRoleFlavor() string {
role := kubernetesSDRoleEndpoint
if cg.version.GTE(semver.MustParse("2.21.0")) && cg.useEndpointSlice {
role = kubernetesSDRoleEndpointSlice
}
return role
}
func getScrapeClassConfig(p monitoringv1.PrometheusInterface) (map[string]monitoringv1.ScrapeClass, string, error) {
var (
cpf = p.GetCommonPrometheusFields()
scrapeClasses = make(map[string]monitoringv1.ScrapeClass, len(cpf.ScrapeClasses))
defaultScrapeClass string
)
for _, scrapeClass := range cpf.ScrapeClasses {
lcv, err := NewLabelConfigValidator(p)
if err != nil {
return nil, "", err
}
if err := lcv.Validate(scrapeClass.Relabelings); err != nil {
return nil, "", fmt.Errorf("invalid relabelings for scrapeClass %s: %w", scrapeClass.Name, err)
}
if err := lcv.Validate(scrapeClass.MetricRelabelings); err != nil {
return nil, "", fmt.Errorf("invalid metric relabelings for scrapeClass %s: %w", scrapeClass.Name, err)
}
if ptr.Deref(scrapeClass.Default, false) {
if defaultScrapeClass != "" {
return nil, "", fmt.Errorf("multiple default scrape classes defined")
}
defaultScrapeClass = scrapeClass.Name
}
scrapeClasses[scrapeClass.Name] = scrapeClass
}
return scrapeClasses, defaultScrapeClass, nil
}
// Version returns the currently configured Prometheus version.
func (cg *ConfigGenerator) Version() semver.Version {
return cg.version
}
// 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: cg.logger.With(keyvals...),
version: cg.version,
notCompatible: cg.notCompatible,
prom: cg.prom,
useEndpointSlice: cg.useEndpointSlice,
scrapeClasses: cg.scrapeClasses,
defaultScrapeClassName: cg.defaultScrapeClassName,
daemonSet: cg.daemonSet,
}
}
// 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: cg.logger.With("minimum_version", version),
version: cg.version,
notCompatible: true,
prom: cg.prom,
useEndpointSlice: cg.useEndpointSlice,
scrapeClasses: cg.scrapeClasses,
defaultScrapeClassName: cg.defaultScrapeClassName,
daemonSet: cg.daemonSet,
}
}
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: cg.logger.With("maximum_version", version),
version: cg.version,
notCompatible: true,
prom: cg.prom,
useEndpointSlice: cg.useEndpointSlice,
scrapeClasses: cg.scrapeClasses,
defaultScrapeClassName: cg.defaultScrapeClassName,
daemonSet: cg.daemonSet,
}
}
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 {
cg.logger.Warn(fmt.Sprintf("ignoring command line argument %q=%q not supported by Prometheus", argument.Name, argument.Value))
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) {
cg.logger.Warn(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 := cg.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 the configuration.
func (cg *ConfigGenerator) addScrapeProtocols(cfg yaml.MapSlice, scrapeProtocols []monitoringv1.ScrapeProtocol) yaml.MapSlice {
if len(scrapeProtocols) == 0 {
return cfg
}
sps := make([]string, 0, len(scrapeProtocols))
for _, sp := range scrapeProtocols {
// PrometheusText1.0.0 requires Prometheus v3.0.0 at least.
if sp == monitoringv1.PrometheusText1_0_0 && !cg.WithMinimumVersion("3.0.0-rc.0").IsCompatible() {
cg.Warn(fmt.Sprintf("scrapeProtocol=%s", monitoringv1.PrometheusText1_0_0))
continue
}
sps = append(sps, string(sp))
}
return cg.WithMinimumVersion("2.49.0").AppendMapItem(cfg, "scrape_protocols", sps)
}
// 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)
}
// addNativeHistogramConfig adds the native histogram field into scrape configurations.
func (cg *ConfigGenerator) addNativeHistogramConfig(cfg yaml.MapSlice, nhc monitoringv1.NativeHistogramConfig) yaml.MapSlice {
if reflect.ValueOf(nhc).IsZero() {
return cfg
}
if nhc.NativeHistogramBucketLimit != nil {
cfg = cg.WithMinimumVersion("2.45.0").AppendMapItem(cfg, "native_histogram_bucket_limit", nhc.NativeHistogramBucketLimit)
}
if nhc.NativeHistogramMinBucketFactor != nil {
cfg = cg.WithMinimumVersion("2.50.0").AppendMapItem(cfg, "native_histogram_min_bucket_factor", nhc.NativeHistogramMinBucketFactor.AsApproximateFloat64())
}
if nhc.ScrapeClassicHistograms != nil {
switch cg.version.Major {
case 3:
cfg = cg.AppendMapItem(cfg, "always_scrape_classic_histograms", nhc.ScrapeClassicHistograms)
default:
cfg = cg.WithMinimumVersion("2.45.0").AppendMapItem(cfg, "scrape_classic_histograms", nhc.ScrapeClassicHistograms)
}
}
return cfg
}
// 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{}
for _, k := range util.SortedKeys(m) {
res = append(res, yaml.MapItem{Key: k, Value: m[k]})
}
return res
}
func mergeSafeTLSConfigWithScrapeClass(tlsConfig *monitoringv1.SafeTLSConfig, scrapeClass monitoringv1.ScrapeClass) *monitoringv1.TLSConfig {
if tlsConfig == nil || reflect.ValueOf(*tlsConfig).IsZero() {
return mergeTLSConfigWithScrapeClass(nil, scrapeClass)
}
return mergeTLSConfigWithScrapeClass(&monitoringv1.TLSConfig{SafeTLSConfig: *tlsConfig}, scrapeClass)
}
func mergeTLSConfigWithScrapeClass(tlsConfig *monitoringv1.TLSConfig, scrapeClass monitoringv1.ScrapeClass) *monitoringv1.TLSConfig {
if tlsConfig == nil {
return scrapeClass.TLSConfig
}
if scrapeClass.TLSConfig == nil {
return 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 mergeAttachMetadataWithScrapeClass(attachMetadata *monitoringv1.AttachMetadata, scrapeClass monitoringv1.ScrapeClass, minimumVersion string) *attachMetadataConfig {
if attachMetadata == nil {
attachMetadata = scrapeClass.AttachMetadata
}
if attachMetadata == nil {
return nil
}
return &attachMetadataConfig{
MinimumVersion: minimumVersion,
attachMetadata: attachMetadata,
}
}
func (cg *ConfigGenerator) addBasicAuthToYaml(
cfg yaml.MapSlice,
store assets.StoreGetter,
basicAuth *monitoringv1.BasicAuth,
) yaml.MapSlice {
if basicAuth == nil {
return cfg
}
username, err := store.GetSecretKey(basicAuth.Username)
if err != nil {
cg.logger.Error("invalid username reference", "err", err)
}
password, err := store.GetSecretKey(basicAuth.Password)
if err != nil {
cg.logger.Error("invalid password reference", "err", err)
}
auth := yaml.MapSlice{
yaml.MapItem{Key: "username", Value: string(username)},
yaml.MapItem{Key: "password", Value: string(password)},
}
return cg.AppendMapItem(cfg, "basic_auth", auth)
}
func (cg *ConfigGenerator) addSigv4ToYaml(cfg yaml.MapSlice,
assetStoreKey string,
store assets.StoreGetter,
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 sigv4.AccessKey != nil && sigv4.SecretKey != nil {
var ak, sk []byte
ak, err := store.GetSecretKey(*sigv4.AccessKey)
if err != nil {
cg.logger.Error("invalid SigV4 access key reference", "err", err)
}
sk, err = store.GetSecretKey(*sigv4.SecretKey)
if err != nil {
cg.logger.Error("invalid SigV4 secret key reference", "err", err)
}
if len(ak) > 0 && len(sk) > 0 {
sigv4Cfg = append(sigv4Cfg,
yaml.MapItem{Key: "access_key", Value: string(ak)},
yaml.MapItem{Key: "secret_key", Value: string(sk)},
)
}
}
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,
store assets.StoreGetter,
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 {
b, err := store.GetSecretKey(*auth.Credentials)
if err != nil {
cg.logger.Error("invalid credentials reference", "err", err)
} else {
authCfg = append(authCfg, yaml.MapItem{Key: "credentials", Value: string(b)})
}
}
return cg.WithMinimumVersion("2.26.0").AppendMapItem(cfg, "authorization", authCfg)
}
func (cg *ConfigGenerator) addAuthorizationToYaml(
cfg yaml.MapSlice,
store assets.StoreGetter,
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{}, 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").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 {
cg.logger.Warn("ignoring external label because it is a reserved key", "key", k)
continue
}
m[k] = v
}
return stringMapToMapSlice(m)
}
func (cg *ConfigGenerator) addProxyConfigtoYaml(
cfg yaml.MapSlice,
store assets.StoreGetter,
proxyConfig monitoringv1.ProxyConfig,
) yaml.MapSlice {
if reflect.ValueOf(proxyConfig).IsZero() {
return cfg
}
if proxyConfig.ProxyURL != nil {
cfg = cg.AppendMapItem(cfg, "proxy_url", *proxyConfig.ProxyURL)
}
cgProxyConfig := cg.WithMinimumVersion("2.43.0")
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 {
proxyConnectHeader[k] = []string{}
for _, s := range v {
value, _ := store.GetSecretKey(s)
proxyConnectHeader[k] = append(proxyConnectHeader[k], string(value))
}
}
cfg = cgProxyConfig.AppendMapItem(cfg, "proxy_connect_header", stringMapToMapSlice(proxyConnectHeader))
}
return cfg
}
func (cg *ConfigGenerator) addSafeTLStoYaml(
cfg yaml.MapSlice,
store assets.StoreGetter,
safetls *monitoringv1.SafeTLSConfig,
) yaml.MapSlice {
if safetls == nil {
return cfg
}
safetlsConfig := yaml.MapSlice{}
if safetls.InsecureSkipVerify != nil {
safetlsConfig = append(safetlsConfig, yaml.MapItem{Key: "insecure_skip_verify", Value: *safetls.InsecureSkipVerify})
}
if safetls.CA.Secret != nil || safetls.CA.ConfigMap != nil {
safetlsConfig = append(safetlsConfig, yaml.MapItem{Key: "ca_file", Value: path.Join(tlsAssetsDir, store.TLSAsset(safetls.CA))})
}
if safetls.Cert.Secret != nil || safetls.Cert.ConfigMap != nil {
safetlsConfig = append(safetlsConfig, yaml.MapItem{Key: "cert_file", Value: path.Join(tlsAssetsDir, store.TLSAsset(safetls.Cert))})
}
if safetls.KeySecret != nil {
safetlsConfig = append(safetlsConfig, yaml.MapItem{Key: "key_file", Value: path.Join(tlsAssetsDir, store.TLSAsset(safetls.KeySecret))})
}
if ptr.Deref(safetls.ServerName, "") != "" {
safetlsConfig = append(safetlsConfig, yaml.MapItem{Key: "server_name", Value: *safetls.ServerName})
}
if safetls.MinVersion != nil {
safetlsConfig = cg.WithMinimumVersion("2.35.0").AppendMapItem(safetlsConfig, "min_version", *safetls.MinVersion)
}
if safetls.MaxVersion != nil {
safetlsConfig = cg.WithMinimumVersion("2.41.0").AppendMapItem(safetlsConfig, "max_version", *safetls.MaxVersion)
}
return cg.AppendMapItem(cfg, "tls_config", safetlsConfig)
}
func (cg *ConfigGenerator) addTLStoYaml(
cfg yaml.MapSlice,
store assets.StoreGetter,
tls *monitoringv1.TLSConfig,
) yaml.MapSlice {
if tls == nil {
return cfg
}
tlsConfig := cg.addSafeTLStoYaml(yaml.MapSlice{}, store, &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})
}
return cg.AppendMapItem(cfg, "tls_config", tlsConfig)
}
// 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(
p *monitoringv1.Prometheus,
sMons map[string]*monitoringv1.ServiceMonitor,
pMons map[string]*monitoringv1.PodMonitor,
probes map[string]*monitoringv1.Probe,
sCons map[string]*monitoringv1alpha1.ScrapeConfig,
store *assets.StoreBuilder,
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
}
}
cfg := yaml.MapSlice{}
// Global config
globalCfg := cg.buildGlobalConfig()
globalCfg = cg.appendEvaluationInterval(globalCfg, p.Spec.EvaluationInterval)
globalCfg = cg.appendRuleQueryOffset(globalCfg, p.Spec.RuleQueryOffset)
globalCfg = cg.appendQueryLogFile(globalCfg, p.Spec.QueryLogFile)
cfg = append(cfg, yaml.MapItem{Key: "global", Value: globalCfg})
// Runtime config
cfg = cg.appendRuntime(cfg)
// Rule Files config
cfg = cg.appendRuleFiles(cfg, ruleConfigMapNames, p.Spec.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(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, p.Spec.Exemplars)
if err != nil {
return nil, fmt.Errorf("generating storage_settings configuration failed: %w", err)
}
s := store.ForNamespace(cg.prom.GetObjectMeta().GetNamespace())
// Alerting config
cfg, err = cg.appendAlertingConfig(cfg, p.Spec.Alerting, additionalAlertRelabelConfigs, additionalAlertManagerConfigs, s)
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(s))
}
// Remote read config
if len(p.Spec.RemoteRead) > 0 {
cfg = append(cfg, cg.generateRemoteReadConfig(p.Spec.RemoteRead, s))
}
// OTLP config
cfg, err = cg.appendOTLPConfig(cfg)
if err != nil {
return nil, fmt.Errorf("failed to generate OTLP configuration: %w", err)
}
cfg, err = cg.appendTracingConfig(cfg, s)
if err != nil {
return nil, fmt.Errorf("failed to generate tracing configuration: %w", err)
}
return yaml.Marshal(cfg)
}
func (cg *ConfigGenerator) appendStorageSettingsConfig(cfg yaml.MapSlice, exemplars *monitoringv1.Exemplars) (yaml.MapSlice, error) {
var (
storage yaml.MapSlice
cgStorage = cg.WithMinimumVersion("2.29.0")
tsdb = cg.prom.GetCommonPrometheusFields().TSDB
)
if exemplars != nil && exemplars.MaxSize != nil {
storage = cgStorage.AppendMapItem(storage, "exemplars", yaml.MapSlice{
{
Key: "max_exemplars",
Value: *exemplars.MaxSize,
},
})
}
if tsdb != nil && tsdb.OutOfOrderTimeWindow != nil {
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.StoreGetter,
) (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"},
},
}
}
// BuildCommonPrometheusArgs builds a slice of arguments that are common between Prometheus Server and Agent.
func (cg *ConfigGenerator) BuildCommonPrometheusArgs() []monitoringv1.Argument {
cpf := cg.prom.GetCommonPrometheusFields()
promArgs := []monitoringv1.Argument{
{Name: "web.console.templates", Value: "/etc/prometheus/consoles"},
{Name: "web.console.libraries", Value: "/etc/prometheus/console_libraries"},
{Name: "config.file", Value: path.Join(ConfOutDir, ConfigEnvsubstFilename)},
}
if ptr.Deref(cpf.ReloadStrategy, monitoringv1.HTTPReloadStrategyType) == monitoringv1.HTTPReloadStrategyType {
promArgs = append(promArgs, monitoringv1.Argument{Name: "web.enable-lifecycle"})
}
if cpf.Web != nil {
if cpf.Web.PageTitle != nil {
promArgs = cg.WithMinimumVersion("2.6.0").AppendCommandlineArgument(promArgs, monitoringv1.Argument{Name: "web.page-title", Value: *cpf.Web.PageTitle})
}
if cpf.Web.MaxConnections != nil {
promArgs = append(promArgs, monitoringv1.Argument{Name: "web.max-connections", Value: fmt.Sprintf("%d", *cpf.Web.MaxConnections)})
}
}
if cpf.EnableRemoteWriteReceiver {
promArgs = cg.WithMinimumVersion("2.33.0").AppendCommandlineArgument(promArgs, monitoringv1.Argument{Name: "web.enable-remote-write-receiver"})
if len(cpf.RemoteWriteReceiverMessageVersions) > 0 {
versions := make([]string, 0, len(cpf.RemoteWriteReceiverMessageVersions))
for _, v := range cpf.RemoteWriteReceiverMessageVersions {
versions = append(versions, toProtobufMessageVersion(v))
}
promArgs = cg.WithMinimumVersion("2.54.0").AppendCommandlineArgument(
promArgs,
monitoringv1.Argument{
Name: "web.remote-write-receiver.accepted-protobuf-messages",
Value: strings.Join(versions, ","),