operator

package
v0.86.0-rhobs1 Latest Latest
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 Go to latest Published: Oct 13, 2025 License: Apache-2.0 Imports: 55 Imported by: 0

Documentation

Index

Constants

View Source 
const (

	// ShardEnvVar is the name of the environment variable injected into the
	// config-reloader container that contains the shard number.
	ShardEnvVar = "SHARD"

	// PodNameEnvVar is the name of the environment variable injected in the
	// config-reloader container that contains the pod name.
	PodNameEnvVar = "POD_NAME"

	// NodeNameEnvVar is the name of the environment variable injected in the
	// config-reloader container that contains the node name.
	NodeNameEnvVar = "NODE_NAME"
)
View Source 
const (
	// DefaultAlertmanagerVersion is a default image tag for the prometheus alertmanager.
	DefaultAlertmanagerVersion = "v0.28.1"
	// DefaultAlertmanagerBaseImage is a base container registry address for the prometheus alertmanager.
	DefaultAlertmanagerBaseImage = "quay.io/prometheus/alertmanager"
	// DefaultAlertmanagerImage is a default image pulling address for the prometheus alertmanager.
	DefaultAlertmanagerImage = DefaultAlertmanagerBaseImage + ":" + DefaultAlertmanagerVersion

	// DefaultThanosVersion is a default image tag for the Thanos long-term prometheus storage collector.
	DefaultThanosVersion = "v0.39.2"
	// DefaultThanosBaseImage is a base container registry address for the Thanos long-term prometheus
	// storage collector.
	DefaultThanosBaseImage = "quay.io/thanos/thanos"
	// DefaultThanosImage is a default image pulling address for the Thanos long-term prometheus storage collector.
	DefaultThanosImage = DefaultThanosBaseImage + ":" + DefaultThanosVersion
)
View Source 
const (
	// InputHashAnnotationKey is the name of the annotation used to store the
	// operator's computed hash value.
	InputHashAnnotationKey = "prometheus-operator-input-hash"

	// ApplicationNameLabelKey is the name of the application.
	ApplicationNameLabelKey = "app.kubernetes.io/name"

	// ManagedByLabelKey is the tool managing the application (e.g. this operator).
	ManagedByLabelKey = "app.kubernetes.io/managed-by"

	// ManagedByLabelValue is the name of this operator.
	ManagedByLabelValue = "prometheus-operator"

	// ApplicationInstanceLabelKey is the unique name identifying the application's instance.
	ApplicationInstanceLabelKey = "app.kubernetes.io/instance"

	// ApplicationVersionLabelKey is the version of the application.
	ApplicationVersionLabelKey = "app.kubernetes.io/version"

	// DefaultContainerAnnotationKey is the annotation defining the default container of the pod.
	DefaultContainerAnnotationKey = "kubectl.kubernetes.io/default-container"
)
View Source 
const (
	PrometheusOperatorFieldManager = "PrometheusOperator"

	InvalidConfigurationEvent = "InvalidConfiguration"
)
View Source 
const (
	AddEvent    = HandlerEvent("add")
	DeleteEvent = HandlerEvent("delete")
	UpdateEvent = HandlerEvent("update")
)
View Source 
const MaxSecretDataSizeBytes = v1.MaxSecretSize - 50_000

MaxSecretDataSizeBytes is the maximum data size that a single secret shard may use. This is lower than v1.MaxSecretSize in order to reserve space for metadata and the rest of the secret k8s object.

Variables

View Source 
var (
	// DefaultPrometheusVersion is a default image tag for the prometheus.
	DefaultPrometheusVersion = PrometheusCompatibilityMatrix[len(PrometheusCompatibilityMatrix)-1]
	// DefaultPrometheusV2 is latest version of Prometheus v2.
	DefaultPrometheusV2 = getLatestPrometheusV2()
	// DefaultPrometheusBaseImage is a base container registry address for the prometheus.
	DefaultPrometheusBaseImage = "quay.io/prometheus/prometheus"
	// DefaultPrometheusImage is a default image pulling address for the prometheus.
	DefaultPrometheusImage = DefaultPrometheusBaseImage + ":" + DefaultPrometheusVersion

	// DefaultPrometheusConfigReloaderImage is an image that will be used as a sidecar to provide dynamic prometheus
	// configuration reloading.
	DefaultPrometheusConfigReloaderImage = "quay.io/rhobs/obo-prometheus-config-reloader:v" + version.Version

	// PrometheusCompatibilityMatrix is a list of supported prometheus versions.
	// prometheus-operator end-to-end tests verify that the operator can deploy from the current LTS version to the latest stable release.
	// This list should be updated every time a new LTS is released.
	PrometheusCompatibilityMatrix = []string{
		"v2.45.0",
		"v2.46.0",
		"v2.47.0",
		"v2.47.1",
		"v2.47.2",
		"v2.48.0",
		"v2.48.1",
		"v2.49.0",
		"v2.49.1",
		"v2.50.0",
		"v2.50.1",
		"v2.51.0",
		"v2.51.1",
		"v2.51.2",
		"v2.52.0",

		"v2.53.0",
		"v2.53.1",
		"v2.53.2",
		"v2.53.3",
		"v2.54.0",
		"v2.54.1",
		"v2.55.0",
		"v2.55.1",
		"v3.0.0",
		"v3.0.1",
		"v3.1.0",
		"v3.2.0",
		"v3.2.1",
		"v3.3.0",
		"v3.3.1",
		"v3.4.0",
		"v3.4.1",
		"v3.4.2",
		"v3.5.0",
		"v3.6.0",
	}
)
View Source 
var (
	DefaultReloaderTestConfig = &Config{
		ReloaderConfig: ContainerConfig{
			CPURequests:    Quantity{q: resource.MustParse("100m")},
			CPULimits:      Quantity{q: resource.MustParse("100m")},
			MemoryRequests: Quantity{q: resource.MustParse("50Mi")},
			MemoryLimits:   Quantity{q: resource.MustParse("50Mi")},
			Image:          "quay.io/rhobs/obo-prometheus-config-reloader:latest",
		},
	}
)
View Source 
var MaxConfigMapDataSize = int(float64(v1.MaxSecretSize) * 0.5)

MaxConfigMapDataSize represents the maximum size for ConfigMap's data. The maximum `Data` size of a ConfigMap seems to differ between environments. This is probably due to different meta data sizes which count into the overall maximum size of a ConfigMap. Thereby lets leave a large buffer.

Functions

func BuildArgs 

func BuildArgs(args []monitoringv1.Argument, additionalArgs []monitoringv1.Argument) ([]string, error)

BuildArgs takes a list of arguments and a list of additional arguments and returns a []string to use in a container Args.

func BuildImagePath 

func BuildImagePath(specImage, baseImage, version, tag, sha string) (string, error)

BuildImagePath builds a container image path based on the given parameters. Return specImage if not empty. If image contains a tag or digest then image will be returned. Otherwise, return image suffixed by either SHA, tag or version(in that order). Inspired by kubernetes code handling of image building.

func BuildImagePathForAgent 

func BuildImagePathForAgent(specImage, baseImage, version string) (string, error)

BuildImagePathForAgent builds a container image path based on the given parameters for Prometheus Agent. Return specImage if not empty. Otherwise a combination of baseImage and version.

func CheckStorageClass 

func CheckStorageClass(ctx context.Context, canReadStorageClass bool, kclient kubernetes.Interface, storage *monitoringv1.StorageSpec) error

func ConfigMapGVK 

func ConfigMapGVK() schema.GroupVersionKind

ConfigMapGVK returns the GroupVersionKind representing ConfigMap objects.

func CreateConfigReloader 

func CreateConfigReloader(name string, options ...ReloaderOption) v1.Container

CreateConfigReloader returns the definition of the config-reloader container.

func ExecAction 

func ExecAction(u string) *v1.ExecAction

ExecAction returns an ExecAction probing the given URL.

func FindStatusCondition 

func FindStatusCondition(conditions []monitoringv1.Condition, conditionType monitoringv1.ConditionType) *monitoringv1.Condition

FindStatusCondition returns the condition matching the given type. If the condition isn't present, it returns nil.

func GenerationChanged 

func GenerationChanged(ep EventPayload) bool

GenerationChanged returns true if the old and current objects don't have the same generation.

It always returns true for creation and deletion events.

func GetObjectFromKey 

func GetObjectFromKey[T runtime.Object](infs *informers.ForResource, key string) (T, error)

GetObjectFromKey retrieves an object from the informer cache using the provided key. It returns a nil value and no error if the object is not found. The function will panic if the caller provides an informer which doesn't reference objects of type T.

func GunzipConfig 

func GunzipConfig(b []byte) (string, error)

func GzipConfig 

func GzipConfig(w io.Writer, conf []byte) error

func LabelsChanged 

func LabelsChanged(ep EventPayload) bool

LabelsChanged returns true if the old and current objects don't have the same labels.

It always returns true for creation and deletion events.

func ListMatchingNamespaces 

func ListMatchingNamespaces(selector labels.Selector, nsInf cache.SharedIndexInformer) ([]string, error)

ListMatchingNamespaces lists all the namespaces that match the provided selector.

func MakeHostAliases 

func MakeHostAliases(input []monitoringv1.HostAlias) []v1.HostAlias

MakeHostAliases converts array of monitoringv1 HostAlias to array of corev1 HostAlias.

func MakeVolumeClaimTemplate 

func MakeVolumeClaimTemplate(e monitoringv1.EmbeddedPersistentVolumeClaim) *v1.PersistentVolumeClaim

func ManagedByOperatorLabelSelector 

func ManagedByOperatorLabelSelector() string

ManagedByOperatorLabelSelector returns a label selector which selects objects managed by this operator.

func ResourceVersionChanged 

func ResourceVersionChanged(ep EventPayload) bool

ResourceVersionChanged returns true if the old and current objects don't have the same resource version.

It always returns true for creation and deletion events.

func SanitizeSTS 

func SanitizeSTS(sts *appsv1.StatefulSet)

SanitizeSTS removes values for APIVersion and Kind from the VolumeClaimTemplates. This prevents update failures due to these fields changing when applied. See https://github.com/kubernetes/kubernetes/issues/87583

func SecretGVK 

func SecretGVK() schema.GroupVersionKind

SecretGVK returns the GroupVersionKind representing Secret objects.

func StatusPoller 

func StatusPoller(ctx context.Context, sr StatusReconciler)

StatusPoller refreshes regularly the objects for which the Available condition isn't True. It ensures that the status subresource eventually reflects the pods conditions. For instance when a new version of the statefulset is rolled out and the updated pod has non-ready containers, the statefulset status won't see any update because the number of ready/updated replicas doesn't change. Without the periodic refresh, the object's status would report "containers with incomplete status: [init-config-reloader]" forever.

func StringValOrDefault 

func StringValOrDefault(val, defaultVal string) string

StringValOrDefault returns the default val if the given string is empty/whitespace. Otherwise returns the value of the string..

func TestSidecarsResources 

func TestSidecarsResources(t *testing.T, makeStatefulSet func(reloaderConfig ContainerConfig) *appsv1.StatefulSet)

func UpdateConditions 

func UpdateConditions(conditions []monitoringv1.Condition, newConditions ...monitoringv1.Condition) []monitoringv1.Condition

UpdateConditions merges the existing conditions with newConditions.

func UpdateObject 

func UpdateObject(o metav1.Object, opts ...ObjectOption)

UpdateObject updates the object's metadata with the provided options. It automatically injects the "managed-by" and "app.kubernetes.io/managed-by" labels which identifies the operator as the managing entity.

func ValidateRule 

func ValidateRule(promRuleSpec monitoringv1.PrometheusRuleSpec, validationScheme model.ValidationScheme) []error

ValidateRule takes PrometheusRuleSpec and validates it using the upstream prometheus rule validator.

func ValidationSchemeForPrometheus 

func ValidationSchemeForPrometheus(version semver.Version) model.ValidationScheme

ValidationSchemeForPrometheus returns the appropriate validation scheme based on Prometheus version.

func ValidationSchemeForThanos 

func ValidationSchemeForThanos(version semver.Version) model.ValidationScheme

ValidationSchemeForThanos returns the appropriate validation scheme based on Thanos version.

func WaitForNamedCacheSync 

func WaitForNamedCacheSync(ctx context.Context, controllerName string, logger *slog.Logger, inf cache.SharedIndexInformer) bool

WaitForNamedCacheSync synchronizes the informer's cache and will log a warning every minute if the operation hasn't completed yet, until it reaches a timeout of 10 minutes. Under normal circumstances, the cache sync should be fast. If it takes more than 1 minute, it means that something is stuck and the message will indicate to the admin which informer is the culprit. See https://github.com/rhobs/obo-prometheus-operator/issues/3347.

Types

type Accessor 

type Accessor struct {
	// contains filtered or unexported fields
}

Accessor can manipulate objects returned by informers and handlers.

func NewAccessor 

func NewAccessor(l *slog.Logger) *Accessor

func (*Accessor) MetaNamespaceKey 

func (a *Accessor) MetaNamespaceKey(obj any) (string, bool)

MetaNamespaceKey returns a key from the object's metadata. For namespaced objects, the format is `<namespace>/<name>`, otherwise `name`.

func (*Accessor) ObjectMetadata 

func (a *Accessor) ObjectMetadata(obj any) (metav1.Object, bool)

ObjectMetadata returns the object's metadata and bool indicating if the conversion succeeded.

type Config 

type Config struct {
	// Version reported by the Kubernetes API.
	KubernetesVersion semver.Version

	// Cluster domain for Kubernetes services managed by the operator.
	ClusterDomain string

	// Global configuration for the reloader config sidecar.
	ReloaderConfig ContainerConfig

	// Base container images for operands.
	AlertmanagerDefaultBaseImage string
	PrometheusDefaultBaseImage   string
	ThanosDefaultBaseImage       string

	// Allow and deny lists for namespace watchers.
	Namespaces Namespaces

	// Metadata applied to all resources managed by the operator.
	Annotations Map
	Labels      Map

	// Custom name to use for "localhost".
	LocalHost string

	// Label and field selectors for resource watchers.
	PromSelector                 LabelSelector
	AlertmanagerSelector         LabelSelector
	ThanosRulerSelector          LabelSelector
	SecretListWatchFieldSelector FieldSelector
	SecretListWatchLabelSelector LabelSelector

	// Controller id for pod ownership.
	ControllerID string

	// Event recorder factory.
	EventRecorderFactory EventRecorderFactory

	// Feature gates.
	Gates *FeatureGates

	WatchObjectRefsInAllNamespaces bool
}

Config defines configuration parameters for the Operator.

func DefaultConfig 

func DefaultConfig(cpu, memory string) Config

DefaultConfig returns a default operator configuration.

func (*Config) RegisterFeatureGatesFlags 

func (c *Config) RegisterFeatureGatesFlags(fs *flag.FlagSet, flags *k8sflag.MapStringBool)

type ConfigReloader 

type ConfigReloader struct {
	// contains filtered or unexported fields
}

ConfigReloader contains the options to configure a config-reloader container.

type ContainerConfig 

type ContainerConfig struct {
	// The struct tag are needed for github.com/mitchellh/hashstructure to take
	// the field values into account when generating the statefulset hash.
	CPURequests    Quantity `hash:"string"`
	CPULimits      Quantity `hash:"string"`
	MemoryRequests Quantity `hash:"string"`
	MemoryLimits   Quantity `hash:"string"`
	Image          string
	EnableProbes   bool
}

ContainerConfig holds some configuration for the ConfigReloader sidecar that can be set through prometheus-operator command line arguments.

func (ContainerConfig) ResourceRequirements 

func (cc ContainerConfig) ResourceRequirements() v1.ResourceRequirements

type EventHandler 

type EventHandler struct {
	// contains filtered or unexported fields
}

EventHandler implements the k8s.io/tools/cache.ResourceEventHandler interface.

func NewEventHandler 

func NewEventHandler(
	logger *slog.Logger,
	accessor *Accessor,
	metrics *Metrics,
	objName string,
	enqueueFunc func(ns string),
	options ...EventHandlerOption,
) *EventHandler

NewEventHandler returns a new event handler.

func (*EventHandler) OnAdd 

func (e *EventHandler) OnAdd(obj any, _ bool)

OnAdd implements the k8s.io/tools/cache.ResourceEventHandler interface.

func (*EventHandler) OnDelete 

func (e *EventHandler) OnDelete(obj any)

OnDelete implements the k8s.io/tools/cache.ResourceEventHandler interface.

func (*EventHandler) OnUpdate 

func (e *EventHandler) OnUpdate(old, cur any)

OnUpdate implements the k8s.io/tools/cache.ResourceEventHandler interface.

type EventHandlerOption 

type EventHandlerOption func(*EventHandler)

EventHandlerOption allows to configure the event handler.

func WithFilter 

func WithFilter(filter FilterFunc) EventHandlerOption

WithFilter adds a filter function to the event handler.

type EventPayload 

type EventPayload struct {
	EventType   EventType
	Old         any
	OldMeta     metav1.Object
	Current     any
	CurrentMeta metav1.Object
}

EventPayload represents the object(s) being notified.

It contains both the raw object and the object's metadata to avoid redundant type-casting.

The Old and OldMeta fields are only set for update events.

type EventRecorder 

type EventRecorder struct {
	// contains filtered or unexported fields
}

EventRecorder records events which are related to the associated Object.

func NewFakeRecorder 

func NewFakeRecorder(bufferSize int, related runtime.Object) *EventRecorder

func (*EventRecorder) Eventf 

func (er *EventRecorder) Eventf(regarding runtime.Object, eventtype, reason, action, note string, args ...interface{})

Eventf records a Kubernetes event.

type EventRecorderFactory 

type EventRecorderFactory func(client kubernetes.Interface, component string) NewEventRecorderFunc

EventRecorderFactory returns an function to create EventRecorder objects.

func NewEventRecorderFactory 

func NewEventRecorderFactory(emitEvents bool) EventRecorderFactory

type EventType 

type EventType int

EventType reports whether the event is a creation, update or deletion. 

const (
	// EventTypeOnAdd represents a creation event.
	EventTypeOnAdd EventType = iota

	// EventTypeOnUpdate represents an update event.
	EventTypeOnUpdate

	// EventTypeOnDelete represents a deletion event.
	EventTypeOnDelete
)

type FeatureGate 

type FeatureGate struct {
	// contains filtered or unexported fields
}

type FeatureGateName 

type FeatureGateName string
const (
	// PrometheusAgentDaemonSetFeature enables the DaemonSet mode for PrometheusAgent.
	PrometheusAgentDaemonSetFeature FeatureGateName = "PrometheusAgentDaemonSet"

	// PrometheusTopologyShardingFeature enables the zone-aware sharding for Prometheus.
	PrometheusTopologyShardingFeature FeatureGateName = "PrometheusTopologySharding"

	// PrometheusShardRetentionPolicyFeature enables the shard retention policy for Prometheus.
	PrometheusShardRetentionPolicyFeature FeatureGateName = "PrometheusShardRetentionPolicy"

	// StatusForConfigurationResourcesFeature enables the status subresource for Prometheus-Operator Config Objects.
	StatusForConfigurationResourcesFeature FeatureGateName = "StatusForConfigurationResources"
)

type FeatureGates 

type FeatureGates map[FeatureGateName]FeatureGate

func (*FeatureGates) Collect 

func (fg *FeatureGates) Collect(ch chan<- prometheus.Metric)

Collect implements the prometheus.Collector interface.

func (*FeatureGates) Describe 

func (fg *FeatureGates) Describe(ch chan<- *prometheus.Desc)

Describe implements the prometheus.Collector interface.

func (*FeatureGates) Descriptions 

func (fg *FeatureGates) Descriptions() []string

func (*FeatureGates) Enabled 

func (fg *FeatureGates) Enabled(name FeatureGateName) bool

func (*FeatureGates) String 

func (fg *FeatureGates) String() string

func (*FeatureGates) UpdateFeatureGates 

func (fg *FeatureGates) UpdateFeatureGates(flags map[string]bool) error

UpdateFeatureGates merges the current feature gate values with the values provided by the user.

type FieldSelector 

type FieldSelector string

func (*FieldSelector) Set 

func (fs *FieldSelector) Set(value string) error

Set implements the flag.Value interface.

func (*FieldSelector) String 

func (fs *FieldSelector) String() string

String implements the flag.Value interface.

type FilterFunc 

type FilterFunc func(EventPayload) bool

FilterFunc is a function that gets an EventPayload and returns true if the object should trigger a reconciliation.

func AnyFilter 

func AnyFilter(filters ...FilterFunc) FilterFunc

AnyFilter returns a FilterFunc which calls the filters sequentially and returns true as soon as one filter returns true.

func HasReferenceFunc 

func HasReferenceFunc(
	informerGetter InformerGetter,
	refResolver RefResolver,
) FilterFunc

HasReferenceFunc returns a function which takes a object (secret or configmap) as input parameter and returns true if at least one workload watched by the controller has a reference to this object or is in the same namespace.

The object is expected to be a *metav1.PartialObjectMetadata.

type FinalizerSyncer 

type FinalizerSyncer struct {
	// contains filtered or unexported fields
}

FinalizerSyncer holds the configuration and dependencies required to perform finalizer synchronization.

func NewFinalizerSyncer 

func NewFinalizerSyncer(
	mdClient metadata.Interface,
	gvr schema.GroupVersionResource,
	configResourcesStatusEnabled bool,
) *FinalizerSyncer

func (*FinalizerSyncer) Sync 

func (s *FinalizerSyncer) Sync(ctx context.Context, p metav1.Object, deletionInProgress bool, statusCleanup func() error) (bool, error)

Sync ensures the `monitoring.rhobs/status-cleanup` finalizer is correctly set on the given workload resource (Prometheus, PrometheusAgent, Alertmanager, or ThanosRuler). It adds the finalizer if necessary, or removes it when appropriate.

Returns true if the finalizer was added, otherwise false. The second return value indicates any error encountered during the operation.

type GoverningObject 

type GoverningObject interface {
	metav1.Object
	ExpectedReplicas() int
	SetReplicas(int)
	SetUpdatedReplicas(int)
	SetAvailableReplicas(int)
	SetUnavailableReplicas(int)
}

type HandlerEvent 

type HandlerEvent string

type InformerGetter 

type InformerGetter interface {
	GetInformers() []informers.InformLister
}

type LabelSelector 

type LabelSelector string

func (*LabelSelector) Set 

func (ls *LabelSelector) Set(value string) error

Set implements the flag.Value interface.

func (*LabelSelector) String 

func (ls *LabelSelector) String() string

String implements the flag.Value interface.

type Map 

type Map map[string]string

func (*Map) Merge 

func (m *Map) Merge(other map[string]string) map[string]string

Merge returns a map which is a merge of the original map and the other parameter. The keys of the original map take precedence over other.

func (*Map) Set 

func (m *Map) Set(value string) error

Set implements the flag.Value interface.

func (*Map) SortedKeys 

func (m *Map) SortedKeys() []string

SortedKeys returns a slice of the keys in increasing order.

func (*Map) String 

func (m *Map) String() string

String implements the flag.Value interface.

type Metrics 

type Metrics struct {
	// contains filtered or unexported fields
}

Metrics represents metrics associated to an operator.

func NewMetrics 

func NewMetrics(r prometheus.Registerer) *Metrics

NewMetrics initializes operator metrics and registers them with the given registerer.

func (*Metrics) Collect 

func (m *Metrics) Collect(ch chan<- prometheus.Metric)

Collect implements the prometheus.Collector interface.

func (*Metrics) Describe 

func (m *Metrics) Describe(ch chan<- *prometheus.Desc)

Describe implements the prometheus.Collector interface.

func (*Metrics) MustRegister 

func (m *Metrics) MustRegister(metrics ...prometheus.Collector)

MustRegister registers metrics with the Metrics registerer.

func (*Metrics) NewInstrumentedListerWatcher 

func (m *Metrics) NewInstrumentedListerWatcher(lw cache.ListerWatcher) cache.ListerWatcher

NewInstrumentedListerWatcher returns a cache.ListerWatcher with instrumentation.

func (*Metrics) Ready 

func (m *Metrics) Ready() prometheus.Gauge

Ready returns a gauge to track whether the controller is ready or not.

func (*Metrics) SetRejectedResources 

func (m *Metrics) SetRejectedResources(objKey, resource string, v int)

SetRejectedResources sets the number of resources that the controller rejected for the given object's key.

func (*Metrics) SetSelectedResources 

func (m *Metrics) SetSelectedResources(objKey, resource string, v int)

SetSelectedResources sets the number of resources that the controller selected for the given object's key.

func (*Metrics) StsDeleteCreateCounter 

func (m *Metrics) StsDeleteCreateCounter() prometheus.Counter

StsDeleteCreateCounter returns a counter to track statefulset's recreations.

func (*Metrics) TriggerByCounter 

func (m *Metrics) TriggerByCounter(triggeredBy string, action HandlerEvent) prometheus.Counter

TriggerByCounter returns a counter to track operator actions by resource type and action (add/delete/update).

type Namespaces 

type Namespaces struct {
	// Allow list of namespaces for common custom resources.
	// If not empty, DenyList must be empty.
	AllowList StringSet
	// Deny list of namespaces for common custom resources.
	// If not empty, AllowList must be empty.
	DenyList StringSet
	// Allow list of namespaces for Prometheus custom resources.
	PrometheusAllowList StringSet
	// Allow list of namespaces for Alertmanager custom resources.
	AlertmanagerAllowList StringSet
	// Allow list of namespaces for AlertmanagerConfig custom resources.
	AlertmanagerConfigAllowList StringSet
	// Allow list of namespaces for ThanosRuler custom resources.
	ThanosRulerAllowList StringSet
}

Namespaces defines the namespaces which are watched by the operator. The zero value is valid and allows all namespaces.

func (*Namespaces) Finalize 

func (n *Namespaces) Finalize() error

Finalize must be called to verify that the configuration is valid.

func (*Namespaces) String 

func (n *Namespaces) String() string

type NewEventRecorderFunc 

type NewEventRecorderFunc func(related runtime.Object) *EventRecorder

NewEventRecorderFunc returns an EventRecorder which will automatically inject the given runtime.Object as related.

type NodeAddressPriority 

type NodeAddressPriority string

func (*NodeAddressPriority) Set 

func (p *NodeAddressPriority) Set(value string) error

Set implements the flag.Value interface.

func (*NodeAddressPriority) String 

func (p *NodeAddressPriority) String() string

String implements the flag.Value interface.

type ObjectOption 

type ObjectOption func(metav1.Object)

func WithAnnotations 

func WithAnnotations(annotations map[string]string) ObjectOption

WithAnnotations merges the given annotations with the existing object's annotations. The given annotations take precedence over the existing ones.

func WithInputHashAnnotation 

func WithInputHashAnnotation(h string) ObjectOption

WithInputHashAnnotation records the given hash string in the object's annotations.

func WithLabels 

func WithLabels(labels map[string]string) ObjectOption

WithLabels merges the given labels with the existing object's labels. The given labels take precedence over the existing ones.

func WithManagingOwner 

func WithManagingOwner(owner Owner) ObjectOption

WithManagingOwner adds the given object as the managing object.

func WithName 

func WithName(name string) ObjectOption

WithName updates the name of the object.

func WithNamespace 

func WithNamespace(namespace string) ObjectOption

WithNamespace updates the namespace of the object.

func WithOwner 

func WithOwner(owner Owner) ObjectOption

WithOwner adds the given object to the list of owner references.

func WithSelectorLabels 

func WithSelectorLabels(selector *metav1.LabelSelector) ObjectOption

WithSelectorLabels merges the labels from the selector with the existing object's labels. The selector's labels take precedence over the existing ones.

func WithoutKubectlAnnotations 

func WithoutKubectlAnnotations() ObjectOption

WithoutKubectlAnnotations removes kubectl annotations inherited from the governing object. Otherwise the managed object might be deleted when "kubectl apply --prune" is run against the governing object.

type OwnedResourceOwner 

type OwnedResourceOwner interface {
	Get(string) (runtime.Object, error)
}

OwnedResourceOwner returns an object from its "<namespace>/<name>" key.

type Owner 

type Owner interface {
	metav1.ObjectMetaAccessor
	schema.ObjectKind
}

type Pod 

type Pod v1.Pod

Pod is an alias for the Kubernetes v1.Pod type.

func (*Pod) Message 

func (p *Pod) Message() string

Message returns a human-readable and terse message about the state of the pod.

func (*Pod) Ready 

func (p *Pod) Ready() bool

Ready returns true if the pod is ready.

type PrometheusRuleSelector 

type PrometheusRuleSelector struct {
	// contains filtered or unexported fields
}

func NewPrometheusRuleSelector 

func NewPrometheusRuleSelector(ruleFormat RuleConfigurationFormat, version string, labelSelector *metav1.LabelSelector, nsLabeler *namespacelabeler.Labeler, ruleInformer *informers.ForResource, eventRecorder *EventRecorder, logger *slog.Logger) (*PrometheusRuleSelector, error)

func (*PrometheusRuleSelector) Select 

func (prs *PrometheusRuleSelector) Select(namespaces []string) (map[string]string, int, error)

Select selects PrometheusRules and translates them into native Prometheus/Thanos configurations. The second returned value is the number of rejected PrometheusRule objects.

type Quantity 

type Quantity struct {
	// contains filtered or unexported fields
}

nolint:recvcheck,godoclint

func (*Quantity) Set 

func (q *Quantity) Set(value string) error

Set implements the flag.Value interface.

func (Quantity) String 

func (q Quantity) String() string

String implements the flag.Value and fmt.Stringer interfaces.

type ReconcilerMetrics 

type ReconcilerMetrics interface {
	TriggerByCounter(string, HandlerEvent) prometheus.Counter
}

ReconcilerMetrics tracks reconciler metrics.

type ReconciliationStatus 

type ReconciliationStatus struct {
	// contains filtered or unexported fields
}

func (ReconciliationStatus) Message 

func (rs ReconciliationStatus) Message() string

func (ReconciliationStatus) Ok 

func (rs ReconciliationStatus) Ok() bool

func (ReconciliationStatus) Reason 

func (rs ReconciliationStatus) Reason() string

type ReconciliationTracker 

type ReconciliationTracker struct {
	// contains filtered or unexported fields
}

ReconciliationTracker tracks reconciliation status per object.

It only uses their `<namespace>/<name>` key to identify objects.

The zero ReconciliationTracker is ready to use.

func (*ReconciliationTracker) Collect 

func (rt *ReconciliationTracker) Collect(ch chan<- prometheus.Metric)

Collect implements the prometheus.Collector interface.

func (*ReconciliationTracker) Describe 

func (rt *ReconciliationTracker) Describe(ch chan<- *prometheus.Desc)

Describe implements the prometheus.Collector interface.

func (*ReconciliationTracker) ForgetObject 

func (rt *ReconciliationTracker) ForgetObject(key string)

ForgetObject removes the given object from the tracker. It should be called when the controller detects that the object has been deleted.

func (*ReconciliationTracker) GetCondition 

func (rt *ReconciliationTracker) GetCondition(k string, gen int64) monitoringv1.Condition

GetCondition returns a monitoringv1.Condition for the last-known reconciliation status of the given object.

func (*ReconciliationTracker) HasRefTo 

func (rt *ReconciliationTracker) HasRefTo(key string, obj runtime.Object) bool

HasRefTo returns true if the object identified by key has a direct or indirect reference to obj (secret or configmap).

func (*ReconciliationTracker) SetStatus 

func (rt *ReconciliationTracker) SetStatus(key string, err error)

SetStatus updates the last reconciliation status for the object identified by key.

func (*ReconciliationTracker) UpdateReferenceTracker 

func (rt *ReconciliationTracker) UpdateReferenceTracker(key string, refTracker ReferenceTracker)

UpdateReferenceTracker updates the reference tracker for the object identified by key.

type RefResolver 

type RefResolver interface {
	HasRefTo(namespacedName string, obj runtime.Object) bool
}

type ReferenceTracker 

type ReferenceTracker interface {
	Has(runtime.Object) bool
}

ReferenceTracker returns true if it has a reference to the object.

type ReloaderOption 

type ReloaderOption = func(*ConfigReloader)

func ConfigEnvsubstFile 

func ConfigEnvsubstFile(configEnvsubstFile string) ReloaderOption

ConfigEnvsubstFile sets the configEnvsubstFile option for the config-reloader container.

func ConfigFile 

func ConfigFile(configFile string) ReloaderOption

ConfigFile sets the configFile option for the config-reloader container.

func ImagePullPolicy 

func ImagePullPolicy(imagePullPolicy v1.PullPolicy) ReloaderOption

ImagePullPolicy sets the imagePullPolicy option for the config-reloader container.

func InitContainer 

func InitContainer() ReloaderOption

InitContainer runs the config-reloader program as an init container meaning that it exits right after generating the configuration.

func ListenLocal 

func ListenLocal(listenLocal bool) ReloaderOption

ListenLocal sets the listenLocal option for the config-reloader container.

func LocalHost 

func LocalHost(localHost string) ReloaderOption

LocalHost sets the localHost option for the config-reloader container.

func LogFormat 

func LogFormat(logFormat string) ReloaderOption

LogFormat sets the logFormat option for the config-reloader container.

func LogLevel 

func LogLevel(logLevel string) ReloaderOption

LogLevel sets the logLevel option for the config-reloader container.

func ReloaderConfig 

func ReloaderConfig(rc ContainerConfig) ReloaderOption

ReloaderConfig sets the config option for the config-reloader container.

func ReloaderURL 

func ReloaderURL(u url.URL) ReloaderOption

ReloaderURL sets the reloaderURL option for the config-reloader container.

func ReloaderUseSignal 

func ReloaderUseSignal() ReloaderOption

func RuntimeInfoURL 

func RuntimeInfoURL(u url.URL) ReloaderOption

RuntimeInfoURL sets the runtimeInfoURL option for the config-reloader container.

func Shard 

func Shard(shard int32) ReloaderOption

Shard sets the shard option for the config-reloader container.

func VolumeMounts 

func VolumeMounts(mounts []v1.VolumeMount) ReloaderOption

VolumeMounts sets the volumeMounts option for the config-reloader container.

func WatchedDirectories 

func WatchedDirectories(watchedDirectories []string) ReloaderOption

WatchedDirectories sets the watchedDirectories option for the config-reloader container.

func WebConfigFile 

func WebConfigFile(config string) ReloaderOption

WebConfigFile sets the webConfigFile option for the config-reloader container.

func WithDaemonSetMode 

func WithDaemonSetMode() ReloaderOption

WithDaemonSetMode sets the options that work for DaemonSet mode. Currently we set SHARD env equal to 0, eventhough DaemonSet doesn't use this env. TODO: Remove SHARD env for DaemonSet mode.

type ResourceReconciler 

type ResourceReconciler struct {
	// contains filtered or unexported fields
}

ResourceReconciler reacts on changes for statefulset-based resources and triggers synchronization of the resources.

ResourceReconciler implements the cache.ResourceEventHandler interface and it can subscribe to resource events like this:

var statefulSetInformer, resourceInformer cache.SharedInformer ... rr := NewResourceReconciler(..., "Prometheus", ...) statefulSetInformer.AddEventHandler(rr) resourceInformer.AddEventHandler(rr)

ResourceReconciler will trigger object and status reconciliations based on the events received from the informer.

func NewResourceReconciler 

func NewResourceReconciler(
	l *slog.Logger,
	syncer Syncer,
	getter OwnedResourceOwner,
	metrics ReconcilerMetrics,
	kind string,
	reg prometheus.Registerer,
	controllerID string,
) *ResourceReconciler

NewResourceReconciler returns a reconciler for the "kind" resource.

func (*ResourceReconciler) DeletionInProgress 

func (rr *ResourceReconciler) DeletionInProgress(o metav1.Object) bool

DeletionInProgress returns true if the object deletion has been requested.

func (*ResourceReconciler) EnqueueForReconciliation 

func (rr *ResourceReconciler) EnqueueForReconciliation(obj metav1.Object)

EnqueueForReconciliation asks for reconciling the object.

func (*ResourceReconciler) EnqueueForStatus 

func (rr *ResourceReconciler) EnqueueForStatus(obj metav1.Object)

EnqueueForStatus asks for updating the status of the object.

func (*ResourceReconciler) OnAdd 

func (rr *ResourceReconciler) OnAdd(obj any, _ bool)

OnAdd implements the cache.ResourceEventHandler interface.

func (*ResourceReconciler) OnDelete 

func (rr *ResourceReconciler) OnDelete(obj any)

OnDelete implements the cache.ResourceEventHandler interface.

func (*ResourceReconciler) OnUpdate 

func (rr *ResourceReconciler) OnUpdate(old, cur any)

OnUpdate implements the cache.ResourceEventHandler interface.

func (*ResourceReconciler) Run 

func (rr *ResourceReconciler) Run(ctx context.Context)

Run the goroutines responsible for processing the reconciliation and status queues.

func (*ResourceReconciler) Stop 

func (rr *ResourceReconciler) Stop()

Stop the processing queues and wait for goroutines to exit.

type RuleConfigurationFormat 

type RuleConfigurationFormat int
const (
	// PrometheusFormat indicates that the rule configuration should comply with the Prometheus format.
	PrometheusFormat RuleConfigurationFormat = iota
	// ThanosFormat indicates that the rule configuration should comply with the Thanos format.
	ThanosFormat
)

type ShardedSecret 

type ShardedSecret struct {
	// contains filtered or unexported fields
}

ShardedSecret can shard Secret data across multiple k8s Secrets. This is used to circumvent the size limitation of k8s Secrets.

func ReconcileShardedSecret 

func ReconcileShardedSecret(ctx context.Context, data map[string][]byte, client kubernetes.Interface, template *v1.Secret) (*ShardedSecret, error)

func (*ShardedSecret) Hash 

func (s *ShardedSecret) Hash() (uint64, error)

Hash implements the Hashable interface from github.com/mitchellh/hashstructure.

func (*ShardedSecret) Volume 

func (s *ShardedSecret) Volume(name string) v1.Volume

Volume returns a v1.Volume object with all TLS assets ready to be mounted in a container. It must be called after UpdateSecrets().

type StatefulSetReporter 

type StatefulSetReporter struct {
	Pods []*Pod
	// contains filtered or unexported fields
}

func NewStatefulSetReporter 

func NewStatefulSetReporter(ctx context.Context, kclient kubernetes.Interface, sset *appsv1.StatefulSet) (*StatefulSetReporter, error)

NewStatefulSetReporter returns a statefulset's reporter.

func (*StatefulSetReporter) IsUpdated 

func (sr *StatefulSetReporter) IsUpdated(p *Pod) bool

IsUpdated returns true if the given pod matches with the statefulset's revision.

func (*StatefulSetReporter) ReadyPods 

func (sr *StatefulSetReporter) ReadyPods() []*Pod

ReadyPods returns the list of pods that are ready.

func (*StatefulSetReporter) Update 

func (sr *StatefulSetReporter) Update(gObj GoverningObject) monitoringv1.Condition

func (*StatefulSetReporter) UpdatedPods 

func (sr *StatefulSetReporter) UpdatedPods() []*Pod

UpdatedPods returns the list of pods that match with the statefulset's revision.

type StatusReconciler 

type StatusReconciler interface {
	Iterate(func(metav1.Object, []monitoringv1.Condition))
	RefreshStatusFor(metav1.Object)
}

type StringSet 

type StringSet map[string]struct{}

StringSet represents a list of comma-separated strings.

func MergeAllowLists 

func MergeAllowLists(a, b StringSet) StringSet

MergeAllowLists returns a StringSet which is the merge of a and b.

func (StringSet) Set 

func (s StringSet) Set(value string) error

Set implements the flag.Value interface.

func (StringSet) Slice 

func (s StringSet) Slice() []string

func (StringSet) String 

func (s StringSet) String() string

String implements the flag.Value interface.

type Syncer 

type Syncer interface {
	// Sync the state of the object identified by its key.
	Sync(context.Context, string) error
	// UpdateStatus updates the status of the object identified by its key.
	UpdateStatus(context.Context, string) error
}

Syncer knows how to synchronize statefulset-based or daemonset-based resources.

Source Files

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