// Copyright 2018 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 v1

import (
	v1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/apimachinery/pkg/util/intstr"
)

const (
	Version = "v1"

	PrometheusesKind  = "Prometheus"
	PrometheusName    = "prometheuses"
	PrometheusKindKey = "prometheus"

	AlertmanagersKind   = "Alertmanager"
	AlertmanagerName    = "alertmanagers"
	AlertManagerKindKey = "alertmanager"

	ServiceMonitorsKind   = "ServiceMonitor"
	ServiceMonitorName    = "servicemonitors"
	ServiceMonitorKindKey = "servicemonitor"

	PrometheusRuleKind    = "PrometheusRule"
	PrometheusRuleName    = "prometheusrules"
	PrometheusRuleKindKey = "prometheusrule"
)

// Prometheus defines a Prometheus deployment.
// +genclient
// +k8s:openapi-gen=true
type Prometheus struct {
	metav1.TypeMeta `json:",inline"`
	// Standard object’s metadata. More info:
	// https://github.com/kubernetes/community/blob/master/contributors/devel/api-conventions.md#metadata
	// +k8s:openapi-gen=false
	metav1.ObjectMeta `json:"metadata,omitempty"`
	// Specification of the desired behavior of the Prometheus cluster. More info:
	// https://github.com/kubernetes/community/blob/master/contributors/devel/api-conventions.md#spec-and-status
	Spec PrometheusSpec `json:"spec"`
	// Most recent observed status of the Prometheus cluster. Read-only. Not
	// included when requesting from the apiserver, only from the Prometheus
	// Operator API itself. More info:
	// https://github.com/kubernetes/community/blob/master/contributors/devel/api-conventions.md#spec-and-status
	Status *PrometheusStatus `json:"status,omitempty"`
}

// PrometheusList is a list of Prometheuses.
// +k8s:openapi-gen=true
type PrometheusList struct {
	metav1.TypeMeta `json:",inline"`
	// Standard list metadata
	// More info: https://github.com/kubernetes/community/blob/master/contributors/devel/api-conventions.md#metadata
	metav1.ListMeta `json:"metadata,omitempty"`
	// List of Prometheuses
	Items []*Prometheus `json:"items"`
}

// PrometheusSpec is a specification of the desired behavior of the Prometheus cluster. More info:
// https://github.com/kubernetes/community/blob/master/contributors/devel/api-conventions.md#spec-and-status
// +k8s:openapi-gen=true
type PrometheusSpec struct {
	// Standard object’s metadata. More info:
	// https://github.com/kubernetes/community/blob/master/contributors/devel/api-conventions.md#metadata
	// Metadata Labels and Annotations gets propagated to the prometheus pods.
	PodMetadata *metav1.ObjectMeta `json:"podMetadata,omitempty"`
	// ServiceMonitors to be selected for target discovery.
	ServiceMonitorSelector *metav1.LabelSelector `json:"serviceMonitorSelector,omitempty"`
	// Namespaces to be selected for ServiceMonitor discovery. If nil, only
	// check own namespace.
	ServiceMonitorNamespaceSelector *metav1.LabelSelector `json:"serviceMonitorNamespaceSelector,omitempty"`
	// Version of Prometheus to be deployed.
	Version string `json:"version,omitempty"`
	// Tag of Prometheus container image to be deployed. Defaults to the value of `version`.
	// Version is ignored if Tag is set.
	Tag string `json:"tag,omitempty"`
	// SHA of Prometheus container image to be deployed. Defaults to the value of `version`.
	// Similar to a tag, but the SHA explicitly deploys an immutable container image.
	// Version and Tag are ignored if SHA is set.
	SHA string `json:"sha,omitempty"`
	// When a Prometheus deployment is paused, no actions except for deletion
	// will be performed on the underlying objects.
	Paused bool `json:"paused,omitempty"`
	// Image if specified has precedence over baseImage, tag and sha
	// combinations. Specifying the version is still necessary to ensure the
	// Prometheus Operator knows what version of Prometheus is being
	// configured.
	Image *string `json:"image,omitempty"`
	// Base image to use for a Prometheus deployment.
	BaseImage string `json:"baseImage,omitempty"`
	// An optional list of references to secrets in the same namespace
	// to use for pulling prometheus and alertmanager images from registries
	// see http://kubernetes.io/docs/user-guide/images#specifying-imagepullsecrets-on-a-pod
	ImagePullSecrets []v1.LocalObjectReference `json:"imagePullSecrets,omitempty"`
	// Number of instances to deploy for a Prometheus deployment.
	Replicas *int32 `json:"replicas,omitempty"`
	// Name of Prometheus external label used to denote replica name.
	// Defaults to the value of `prometheus_replica`. External label will
	// _not_ be added when value is set to empty string (`""`).
	ReplicaExternalLabelName *string `json:"replicaExternalLabelName,omitempty"`
	// Name of Prometheus external label used to denote Prometheus instance
	// name. Defaults to the value of `prometheus`. External label will
	// _not_ be added when value is set to empty string (`""`).
	PrometheusExternalLabelName *string `json:"prometheusExternalLabelName,omitempty"`
	// Time duration Prometheus shall retain data for. Default is '24h',
	// and must match the regular expression `[0-9]+(ms|s|m|h|d|w|y)` (milliseconds seconds minutes hours days weeks years).
	Retention string `json:"retention,omitempty"`
	// Log level for Prometheus to be configured with.
	LogLevel string `json:"logLevel,omitempty"`
	// Log format for Prometheus to be configured with.
	LogFormat string `json:"logFormat,omitempty"`
	// Interval between consecutive scrapes.
	ScrapeInterval string `json:"scrapeInterval,omitempty"`
	// Interval between consecutive evaluations.
	EvaluationInterval string `json:"evaluationInterval,omitempty"`
	// /--rules.*/ command-line arguments.
	Rules Rules `json:"rules,omitempty"`
	// The labels to add to any time series or alerts when communicating with
	// external systems (federation, remote storage, Alertmanager).
	ExternalLabels map[string]string `json:"externalLabels,omitempty"`
	// Enable access to prometheus web admin API. Defaults to the value of `false`.
	// WARNING: Enabling the admin APIs enables mutating endpoints, to delete data,
	// shutdown Prometheus, and more. Enabling this should be done with care and the
	// user is advised to add additional authentication authorization via a proxy to
	// ensure only clients authorized to perform these actions can do so.
	// For more information see https://prometheus.io/docs/prometheus/latest/querying/api/#tsdb-admin-apis
	EnableAdminAPI bool `json:"enableAdminAPI,omitempty"`
	// The external URL the Prometheus instances will be available under. This is
	// necessary to generate correct URLs. This is necessary if Prometheus is not
	// served from root of a DNS name.
	ExternalURL string `json:"externalUrl,omitempty"`
	// The route prefix Prometheus registers HTTP handlers for. This is useful,
	// if using ExternalURL and a proxy is rewriting HTTP routes of a request,
	// and the actual ExternalURL is still true, but the server serves requests
	// under a different route prefix. For example for use with `kubectl proxy`.
	RoutePrefix string `json:"routePrefix,omitempty"`
	// QuerySpec defines the query command line flags when starting Prometheus.
	Query *QuerySpec `json:"query,omitempty"`
	// Storage spec to specify how storage shall be used.
	Storage *StorageSpec `json:"storage,omitempty"`
	// A selector to select which PrometheusRules to mount for loading alerting
	// rules from. Until (excluding) Prometheus Operator v0.24.0 Prometheus
	// Operator will migrate any legacy rule ConfigMaps to PrometheusRule custom
	// resources selected by RuleSelector. Make sure it does not match any config
	// maps that you do not want to be migrated.
	RuleSelector *metav1.LabelSelector `json:"ruleSelector,omitempty"`
	// Namespaces to be selected for PrometheusRules discovery. If unspecified, only
	// the same namespace as the Prometheus object is in is used.
	RuleNamespaceSelector *metav1.LabelSelector `json:"ruleNamespaceSelector,omitempty"`
	// Define details regarding alerting.
	Alerting *AlertingSpec `json:"alerting,omitempty"`
	// Define resources requests and limits for single Pods.
	Resources v1.ResourceRequirements `json:"resources,omitempty"`
	// Define which Nodes the Pods are scheduled on.
	NodeSelector map[string]string `json:"nodeSelector,omitempty"`
	// ServiceAccountName is the name of the ServiceAccount to use to run the
	// Prometheus Pods.
	ServiceAccountName string `json:"serviceAccountName,omitempty"`
	// Secrets is a list of Secrets in the same namespace as the Prometheus
	// object, which shall be mounted into the Prometheus Pods.
	// The Secrets are mounted into /etc/prometheus/secrets/<secret-name>.
	Secrets []string `json:"secrets,omitempty"`
	// ConfigMaps is a list of ConfigMaps in the same namespace as the Prometheus
	// object, which shall be mounted into the Prometheus Pods.
	// The ConfigMaps are mounted into /etc/prometheus/configmaps/<configmap-name>.
	ConfigMaps []string `json:"configMaps,omitempty"`
	// If specified, the pod's scheduling constraints.
	Affinity *v1.Affinity `json:"affinity,omitempty"`
	// If specified, the pod's tolerations.
	Tolerations []v1.Toleration `json:"tolerations,omitempty"`
	// If specified, the remote_write spec. This is an experimental feature, it may change in any upcoming release in a breaking way.
	RemoteWrite []RemoteWriteSpec `json:"remoteWrite,omitempty"`
	// If specified, the remote_read spec. This is an experimental feature, it may change in any upcoming release in a breaking way.
	RemoteRead []RemoteReadSpec `json:"remoteRead,omitempty"`
	// SecurityContext holds pod-level security attributes and common container settings.
	// This defaults to the default PodSecurityContext.
	SecurityContext *v1.PodSecurityContext `json:"securityContext,omitempty"`
	// ListenLocal makes the Prometheus server listen on loopback, so that it
	// does not bind against the Pod IP.
	ListenLocal bool `json:"listenLocal,omitempty"`
	// Containers allows injecting additional containers or modifying operator generated
	// containers. This can be used to allow adding an authentication proxy to a Prometheus pod or
	// to change the behavior of an operator generated container. Containers described here modify
	// an operator generated container if they share the same name and modifications are done via a
	// strategic merge patch. The current container names are: `prometheus`,
	// `prometheus-config-reloader`, `rules-configmap-reloader`, and `thanos-sidecar`. Overriding
	// containers is entirely outside the scope of what the maintainers will support and by doing
	// so, you accept that this behaviour may break at any time without notice.
	Containers []v1.Container `json:"containers,omitempty"`
	// AdditionalScrapeConfigs allows specifying a key of a Secret containing
	// additional Prometheus scrape configurations. Scrape configurations
	// specified are appended to the configurations generated by the Prometheus
	// Operator. Job configurations specified must have the form as specified
	// in the official Prometheus documentation:
	// https://prometheus.io/docs/prometheus/latest/configuration/configuration/#scrape_config.
	// As scrape configs are appended, the user is responsible to make sure it
	// is valid. Note that using this feature may expose the possibility to
	// break upgrades of Prometheus. It is advised to review Prometheus release
	// notes to ensure that no incompatible scrape configs are going to break
	// Prometheus after the upgrade.
	AdditionalScrapeConfigs *v1.SecretKeySelector `json:"additionalScrapeConfigs,omitempty"`
	// AdditionalAlertRelabelConfigs allows specifying a key of a Secret containing
	// additional Prometheus alert relabel configurations. Alert relabel configurations
	// specified are appended to the configurations generated by the Prometheus
	// Operator. Alert relabel configurations specified must have the form as specified
	// in the official Prometheus documentation:
	// https://prometheus.io/docs/prometheus/latest/configuration/configuration/#alert_relabel_configs.
	// As alert relabel configs are appended, the user is responsible to make sure it
	// is valid. Note that using this feature may expose the possibility to
	// break upgrades of Prometheus. It is advised to review Prometheus release
	// notes to ensure that no incompatible alert relabel configs are going to break
	// Prometheus after the upgrade.
	AdditionalAlertRelabelConfigs *v1.SecretKeySelector `json:"additionalAlertRelabelConfigs,omitempty"`
	// AdditionalAlertManagerConfigs allows specifying a key of a Secret containing
	// additional Prometheus AlertManager configurations. AlertManager configurations
	// specified are appended to the configurations generated by the Prometheus
	// Operator. Job configurations specified must have the form as specified
	// in the official Prometheus documentation:
	// https://prometheus.io/docs/prometheus/latest/configuration/configuration/#alertmanager_config.
	// As AlertManager configs are appended, the user is responsible to make sure it
	// is valid. Note that using this feature may expose the possibility to
	// break upgrades of Prometheus. It is advised to review Prometheus release
	// notes to ensure that no incompatible AlertManager configs are going to break
	// Prometheus after the upgrade.
	AdditionalAlertManagerConfigs *v1.SecretKeySelector `json:"additionalAlertManagerConfigs,omitempty"`
	// APIServerConfig allows specifying a host and auth methods to access apiserver.
	// If left empty, Prometheus is assumed to run inside of the cluster
	// and will discover API servers automatically and use the pod's CA certificate
	// and bearer token file at /var/run/secrets/kubernetes.io/serviceaccount/.
	APIServerConfig *APIServerConfig `json:"apiserverConfig,omitempty"`
	// Thanos configuration allows configuring various aspects of a Prometheus
	// server in a Thanos environment.
	//
	// This section is experimental, it may change significantly without
	// deprecation notice in any release.
	//
	// This is experimental and may change significantly without backward
	// compatibility in any release.
	Thanos *ThanosSpec `json:"thanos,omitempty"`
	// Priority class assigned to the Pods
	PriorityClassName string `json:"priorityClassName,omitempty"`
}

// PrometheusStatus is the most recent observed status of the Prometheus cluster. Read-only. Not
// included when requesting from the apiserver, only from the Prometheus
// Operator API itself. More info:
// https://github.com/kubernetes/community/blob/master/contributors/devel/api-conventions.md#spec-and-status
// +k8s:openapi-gen=true
type PrometheusStatus struct {
	// Represents whether any actions on the underlaying managed objects are
	// being performed. Only delete actions will be performed.
	Paused bool `json:"paused"`
	// Total number of non-terminated pods targeted by this Prometheus deployment
	// (their labels match the selector).
	Replicas int32 `json:"replicas"`
	// Total number of non-terminated pods targeted by this Prometheus deployment
	// that have the desired version spec.
	UpdatedReplicas int32 `json:"updatedReplicas"`
	// Total number of available pods (ready for at least minReadySeconds)
	// targeted by this Prometheus deployment.
	AvailableReplicas int32 `json:"availableReplicas"`
	// Total number of unavailable pods targeted by this Prometheus deployment.
	UnavailableReplicas int32 `json:"unavailableReplicas"`
}

// AlertingSpec defines parameters for alerting configuration of Prometheus servers.
// +k8s:openapi-gen=true
type AlertingSpec struct {
	// AlertmanagerEndpoints Prometheus should fire alerts against.
	Alertmanagers []AlertmanagerEndpoints `json:"alertmanagers"`
}

// StorageSpec defines the configured storage for a group Prometheus servers.
// If neither `emptyDir` nor `volumeClaimTemplate` is specified, then by default an [EmptyDir](https://kubernetes.io/docs/concepts/storage/volumes/#emptydir) will be used.
// +k8s:openapi-gen=true
type StorageSpec struct {
	// EmptyDirVolumeSource to be used by the Prometheus StatefulSets. If specified, used in place of any volumeClaimTemplate. More
	// info: https://kubernetes.io/docs/concepts/storage/volumes/#emptydir
	EmptyDir *v1.EmptyDirVolumeSource `json:"emptyDir,omitempty"`
	// A PVC spec to be used by the Prometheus StatefulSets.
	VolumeClaimTemplate v1.PersistentVolumeClaim `json:"volumeClaimTemplate,omitempty"`
}

// QuerySpec defines the query command line flags when starting Prometheus.
// +k8s:openapi-gen=true
type QuerySpec struct {
	// The delta difference allowed for retrieving metrics during expression evaluations.
	LookbackDelta *string `json:"lookbackDelta,omitempty"`
	// Number of concurrent queries that can be run at once.
	MaxConcurrency *int32 `json:"maxConcurrency,omitempty"`
	// Maximum number of samples a single query can load into memory. Note that queries will fail if they would load more samples than this into memory, so this also limits the number of samples a query can return.
	MaxSamples *int32 `json:"maxSamples,omitempty"`
	// Maximum time a query may take before being aborted.
	Timeout *string `json:"timeout,omitempty"`
}

// ThanosSpec defines parameters for a Prometheus server within a Thanos deployment.
// +k8s:openapi-gen=true
type ThanosSpec struct {
	// Peers is a DNS name for Thanos to discover peers through.
	Peers *string `json:"peers,omitempty"`
	// Image if specified has precedence over baseImage, tag and sha
	// combinations. Specifying the version is still necessary to ensure the
	// Prometheus Operator knows what version of Thanos is being
	// configured.
	Image *string `json:"image,omitempty"`
	// Version describes the version of Thanos to use.
	Version *string `json:"version,omitempty"`
	// Tag of Thanos sidecar container image to be deployed. Defaults to the value of `version`.
	// Version is ignored if Tag is set.
	Tag *string `json:"tag,omitempty"`
	// SHA of Thanos container image to be deployed. Defaults to the value of `version`.
	// Similar to a tag, but the SHA explicitly deploys an immutable container image.
	// Version and Tag are ignored if SHA is set.
	SHA *string `json:"sha,omitempty"`
	// Thanos base image if other than default.
	BaseImage *string `json:"baseImage,omitempty"`
	// Resources defines the resource requirements for the Thanos sidecar.
	// If not provided, no requests/limits will be set
	Resources v1.ResourceRequirements `json:"resources,omitempty"`
	// Deprecated: GCS should be configured with an ObjectStorageConfig secret
	// starting with Thanos v0.2.0. This field will be removed.
	GCS *ThanosGCSSpec `json:"gcs,omitempty"`
	// Deprecated: S3 should be configured with an ObjectStorageConfig secret
	// starting with Thanos v0.2.0. This field will be removed.
	S3 *ThanosS3Spec `json:"s3,omitempty"`
	// ObjectStorageConfig configures object storage in Thanos.
	ObjectStorageConfig *v1.SecretKeySelector `json:"objectStorageConfig,omitempty"`
	// Explicit (external) host:port address to advertise for gRPC StoreAPI in gossip cluster.
	// If empty, 'grpc-address' will be used.
	GrpcAdvertiseAddress *string `json:"grpcAdvertiseAddress,omitempty"`
	// Explicit (external) ip:port address to advertise for gossip in gossip cluster.
	// Used internally for membership only.
	ClusterAdvertiseAddress *string `json:"clusterAdvertiseAddress,omitempty"`
}

// Deprecated: ThanosGCSSpec should be configured with an ObjectStorageConfig
// secret starting with Thanos v0.2.0. ThanosGCSSpec will be removed.
//
// +k8s:openapi-gen=true
type ThanosGCSSpec struct {
	// Google Cloud Storage bucket name for stored blocks. If empty it won't
	// store any block inside Google Cloud Storage.
	Bucket *string `json:"bucket,omitempty"`
	// Secret to access our Bucket.
	SecretKey *v1.SecretKeySelector `json:"credentials,omitempty"`
}

// Deprecated: ThanosS3Spec should be configured with an ObjectStorageConfig
// secret starting with Thanos v0.2.0. ThanosS3Spec will be removed.
//
// +k8s:openapi-gen=true
type ThanosS3Spec struct {
	// S3-Compatible API bucket name for stored blocks.
	Bucket *string `json:"bucket,omitempty"`
	// S3-Compatible API endpoint for stored blocks.
	Endpoint *string `json:"endpoint,omitempty"`
	// AccessKey for an S3-Compatible API.
	AccessKey *v1.SecretKeySelector `json:"accessKey,omitempty"`
	// SecretKey for an S3-Compatible API.
	SecretKey *v1.SecretKeySelector `json:"secretKey,omitempty"`
	// Whether to use an insecure connection with an S3-Compatible API.
	Insecure *bool `json:"insecure,omitempty"`
	// Whether to use S3 Signature Version 2; otherwise Signature Version 4 will be used.
	SignatureVersion2 *bool `json:"signatureVersion2,omitempty"`
	// Whether to use Server Side Encryption
	EncryptSSE *bool `json:"encryptsse,omitempty"`
}

// RemoteWriteSpec defines the remote_write configuration for prometheus.
// +k8s:openapi-gen=true
type RemoteWriteSpec struct {
	//The URL of the endpoint to send samples to.
	URL string `json:"url"`
	//Timeout for requests to the remote write endpoint.
	RemoteTimeout string `json:"remoteTimeout,omitempty"`
	//The list of remote write relabel configurations.
	WriteRelabelConfigs []RelabelConfig `json:"writeRelabelConfigs,omitempty"`
	//BasicAuth for the URL.
	BasicAuth *BasicAuth `json:"basicAuth,omitempty"`
	// File to read bearer token for remote write.
	BearerToken string `json:"bearerToken,omitempty"`
	// File to read bearer token for remote write.
	BearerTokenFile string `json:"bearerTokenFile,omitempty"`
	// TLS Config to use for remote write.
	TLSConfig *TLSConfig `json:"tlsConfig,omitempty"`
	//Optional ProxyURL
	ProxyURL string `json:"proxyUrl,omitempty"`
	// QueueConfig allows tuning of the remote write queue parameters.
	QueueConfig *QueueConfig `json:"queueConfig,omitempty"`
}

// QueueConfig allows the tuning of remote_write queue_config parameters. This object
// is referenced in the RemoteWriteSpec object.
// +k8s:openapi-gen=true
type QueueConfig struct {
	// Capacity is the number of samples to buffer per shard before we start dropping them.
	Capacity int `json:"capacity,omitempty"`
	// MinShards is the minimum number of shards, i.e. amount of concurrency.
	MinShards int `json:"minShards,omitempty"`
	// MaxShards is the maximum number of shards, i.e. amount of concurrency.
	MaxShards int `json:"maxShards,omitempty"`
	// MaxSamplesPerSend is the maximum number of samples per send.
	MaxSamplesPerSend int `json:"maxSamplesPerSend,omitempty"`
	// BatchSendDeadline is the maximum time a sample will wait in buffer.
	BatchSendDeadline string `json:"batchSendDeadline,omitempty"`
	// MaxRetries is the maximum number of times to retry a batch on recoverable errors.
	MaxRetries int `json:"maxRetries,omitempty"`
	// MinBackoff is the initial retry delay. Gets doubled for every retry.
	MinBackoff string `json:"minBackoff,omitempty"`
	// MaxBackoff is the maximum retry delay.
	MaxBackoff string `json:"maxBackoff,omitempty"`
}

// RemoteReadSpec defines the remote_read configuration for prometheus.
// +k8s:openapi-gen=true
type RemoteReadSpec struct {
	//The URL of the endpoint to send samples to.
	URL string `json:"url"`
	//An optional list of equality matchers which have to be present
	// in a selector to query the remote read endpoint.
	RequiredMatchers map[string]string `json:"requiredMatchers,omitempty"`
	//Timeout for requests to the remote read endpoint.
	RemoteTimeout string `json:"remoteTimeout,omitempty"`
	//Whether reads should be made for queries for time ranges that
	// the local storage should have complete data for.
	ReadRecent bool `json:"readRecent,omitempty"`
	//BasicAuth for the URL.
	BasicAuth *BasicAuth `json:"basicAuth,omitempty"`
	// bearer token for remote read.
	BearerToken string `json:"bearerToken,omitempty"`
	// File to read bearer token for remote read.
	BearerTokenFile string `json:"bearerTokenFile,omitempty"`
	// TLS Config to use for remote read.
	TLSConfig *TLSConfig `json:"tlsConfig,omitempty"`
	//Optional ProxyURL
	ProxyURL string `json:"proxyUrl,omitempty"`
}

// RelabelConfig allows dynamic rewriting of the label set, being applied to samples before ingestion.
// It defines `<metric_relabel_configs>`-section of Prometheus configuration.
// More info: https://prometheus.io/docs/prometheus/latest/configuration/configuration/#metric_relabel_configs
// +k8s:openapi-gen=true
type RelabelConfig struct {
	//The source labels select values from existing labels. Their content is concatenated
	//using the configured separator and matched against the configured regular expression
	//for the replace, keep, and drop actions.
	SourceLabels []string `json:"sourceLabels,omitempty"`
	//Separator placed between concatenated source label values. default is ';'.
	Separator string `json:"separator,omitempty"`
	//Label to which the resulting value is written in a replace action.
	//It is mandatory for replace actions. Regex capture groups are available.
	TargetLabel string `json:"targetLabel,omitempty"`
	//Regular expression against which the extracted value is matched. defailt is '(.*)'
	Regex string `json:"regex,omitempty"`
	// Modulus to take of the hash of the source label values.
	Modulus uint64 `json:"modulus,omitempty"`
	//Replacement value against which a regex replace is performed if the
	//regular expression matches. Regex capture groups are available. Default is '$1'
	Replacement string `json:"replacement,omitempty"`
	// Action to perform based on regex matching. Default is 'replace'
	Action string `json:"action,omitempty"`
}

// APIServerConfig defines a host and auth methods to access apiserver.
// More info: https://prometheus.io/docs/prometheus/latest/configuration/configuration/#kubernetes_sd_config
// +k8s:openapi-gen=true
type APIServerConfig struct {
	// Host of apiserver.
	// A valid string consisting of a hostname or IP followed by an optional port number
	Host string `json:"host"`
	// BasicAuth allow an endpoint to authenticate over basic authentication
	BasicAuth *BasicAuth `json:"basicAuth,omitempty"`
	// Bearer token for accessing apiserver.
	BearerToken string `json:"bearerToken,omitempty"`
	// File to read bearer token for accessing apiserver.
	BearerTokenFile string `json:"bearerTokenFile,omitempty"`
	// TLS Config to use for accessing apiserver.
	TLSConfig *TLSConfig `json:"tlsConfig,omitempty"`
}

// AlertmanagerEndpoints defines a selection of a single Endpoints object
// containing alertmanager IPs to fire alerts against.
// +k8s:openapi-gen=true
type AlertmanagerEndpoints struct {
	// Namespace of Endpoints object.
	Namespace string `json:"namespace"`
	// Name of Endpoints object in Namespace.
	Name string `json:"name"`
	// Port the Alertmanager API is exposed on.
	Port intstr.IntOrString `json:"port"`
	// Scheme to use when firing alerts.
	Scheme string `json:"scheme,omitempty"`
	// Prefix for the HTTP path alerts are pushed to.
	PathPrefix string `json:"pathPrefix,omitempty"`
	// TLS Config to use for alertmanager connection.
	TLSConfig *TLSConfig `json:"tlsConfig,omitempty"`
	// BearerTokenFile to read from filesystem to use when authenticating to
	// Alertmanager.
	BearerTokenFile string `json:"bearerTokenFile,omitempty"`
}

// ServiceMonitor defines monitoring for a set of services.
// +genclient
// +k8s:openapi-gen=true
type ServiceMonitor struct {
	metav1.TypeMeta `json:",inline"`
	// Standard object’s metadata. More info:
	// https://github.com/kubernetes/community/blob/master/contributors/devel/api-conventions.md#metadata
	// +k8s:openapi-gen=false
	metav1.ObjectMeta `json:"metadata,omitempty"`
	// Specification of desired Service selection for target discrovery by
	// Prometheus.
	Spec ServiceMonitorSpec `json:"spec"`
}

// ServiceMonitorSpec contains specification parameters for a ServiceMonitor.
// +k8s:openapi-gen=true
type ServiceMonitorSpec struct {
	// The label to use to retrieve the job name from.
	JobLabel string `json:"jobLabel,omitempty"`
	// TargetLabels transfers labels on the Kubernetes Service onto the target.
	TargetLabels []string `json:"targetLabels,omitempty"`
	// PodTargetLabels transfers labels on the Kubernetes Pod onto the target.
	PodTargetLabels []string `json:"podTargetLabels,omitempty"`
	// A list of endpoints allowed as part of this ServiceMonitor.
	Endpoints []Endpoint `json:"endpoints"`
	// Selector to select Endpoints objects.
	Selector metav1.LabelSelector `json:"selector"`
	// Selector to select which namespaces the Endpoints objects are discovered from.
	NamespaceSelector NamespaceSelector `json:"namespaceSelector,omitempty"`
	// SampleLimit defines per-scrape limit on number of scraped samples that will be accepted.
	SampleLimit uint64 `json:"sampleLimit,omitempty"`
}

// Endpoint defines a scrapeable endpoint serving Prometheus metrics.
// +k8s:openapi-gen=true
type Endpoint struct {
	// Name of the service port this endpoint refers to. Mutually exclusive with targetPort.
	Port string `json:"port,omitempty"`
	// Name or number of the target port of the endpoint. Mutually exclusive with port.
	TargetPort *intstr.IntOrString `json:"targetPort,omitempty"`
	// HTTP path to scrape for metrics.
	Path string `json:"path,omitempty"`
	// HTTP scheme to use for scraping.
	Scheme string `json:"scheme,omitempty"`
	// Optional HTTP URL parameters
	Params map[string][]string `json:"params,omitempty"`
	// Interval at which metrics should be scraped
	Interval string `json:"interval,omitempty"`
	// Timeout after which the scrape is ended
	ScrapeTimeout string `json:"scrapeTimeout,omitempty"`
	// TLS configuration to use when scraping the endpoint
	TLSConfig *TLSConfig `json:"tlsConfig,omitempty"`
	// File to read bearer token for scraping targets.
	BearerTokenFile string `json:"bearerTokenFile,omitempty"`
	// HonorLabels chooses the metric's labels on collisions with target labels.
	HonorLabels bool `json:"honorLabels,omitempty"`
	// BasicAuth allow an endpoint to authenticate over basic authentication
	// More info: https://prometheus.io/docs/operating/configuration/#endpoints
	BasicAuth *BasicAuth `json:"basicAuth,omitempty"`
	// MetricRelabelConfigs to apply to samples before ingestion.
	MetricRelabelConfigs []*RelabelConfig `json:"metricRelabelings,omitempty"`
	// RelabelConfigs to apply to samples before ingestion.
	// More info: https://prometheus.io/docs/prometheus/latest/configuration/configuration/#relabel_config
	RelabelConfigs []*RelabelConfig `json:"relabelings,omitempty"`
	// ProxyURL eg http://proxyserver:2195 Directs scrapes to proxy through this endpoint.
	ProxyURL *string `json:"proxyUrl,omitempty"`
}

// BasicAuth allow an endpoint to authenticate over basic authentication
// More info: https://prometheus.io/docs/operating/configuration/#endpoints
// +k8s:openapi-gen=true
type BasicAuth struct {
	// The secret that contains the username for authenticate
	Username v1.SecretKeySelector `json:"username,omitempty"`
	// The secret that contains the password for authenticate
	Password v1.SecretKeySelector `json:"password,omitempty"`
}

// TLSConfig specifies TLS configuration parameters.
// +k8s:openapi-gen=true
type TLSConfig struct {
	// The CA cert to use for the targets.
	CAFile string `json:"caFile,omitempty"`
	// The client cert file for the targets.
	CertFile string `json:"certFile,omitempty"`
	// The client key file for the targets.
	KeyFile string `json:"keyFile,omitempty"`
	// Used to verify the hostname for the targets.
	ServerName string `json:"serverName,omitempty"`
	// Disable target certificate validation.
	InsecureSkipVerify bool `json:"insecureSkipVerify,omitempty"`
}

// ServiceMonitorList is a list of ServiceMonitors.
// +k8s:openapi-gen=true
type ServiceMonitorList struct {
	metav1.TypeMeta `json:",inline"`
	// Standard list metadata
	// More info: https://github.com/kubernetes/community/blob/master/contributors/devel/api-conventions.md#metadata
	metav1.ListMeta `json:"metadata,omitempty"`
	// List of ServiceMonitors
	Items []*ServiceMonitor `json:"items"`
}

// PrometheusRuleList is a list of PrometheusRules.
// +k8s:openapi-gen=true
type PrometheusRuleList struct {
	metav1.TypeMeta `json:",inline"`
	// Standard list metadata
	// More info: http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#metadata
	metav1.ListMeta `json:"metadata,omitempty"`
	// List of Rules
	Items []*PrometheusRule `json:"items"`
}

// PrometheusRule defines alerting rules for a Prometheus instance
// +genclient
// +k8s:openapi-gen=true
type PrometheusRule struct {
	metav1.TypeMeta `json:",inline"`
	// Standard object’s metadata. More info:
	// http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#metadata
	metav1.ObjectMeta `json:"metadata,omitempty"`
	// Specification of desired alerting rule definitions for Prometheus.
	Spec PrometheusRuleSpec `json:"spec"`
}

// PrometheusRuleSpec contains specification parameters for a Rule.
// +k8s:openapi-gen=true
type PrometheusRuleSpec struct {
	// Content of Prometheus rule file
	Groups []RuleGroup `json:"groups,omitempty"`
}

// RuleGroup and Rule are copied instead of vendored because the
// upstream Prometheus struct definitions don't have json struct tags.

// RuleGroup is a list of sequentially evaluated recording and alerting rules.
// +k8s:openapi-gen=true
type RuleGroup struct {
	Name     string `json:"name"`
	Interval string `json:"interval,omitempty"`
	Rules    []Rule `json:"rules"`
}

// Rule describes an alerting or recording rule.
// +k8s:openapi-gen=true
type Rule struct {
	Record      string             `json:"record,omitempty"`
	Alert       string             `json:"alert,omitempty"`
	Expr        intstr.IntOrString `json:"expr"`
	For         string             `json:"for,omitempty"`
	Labels      map[string]string  `json:"labels,omitempty"`
	Annotations map[string]string  `json:"annotations,omitempty"`
}

// Alertmanager describes an Alertmanager cluster.
// +genclient
// +k8s:openapi-gen=true
type Alertmanager struct {
	metav1.TypeMeta `json:",inline"`
	// Standard object’s metadata. More info:
	// https://github.com/kubernetes/community/blob/master/contributors/devel/api-conventions.md#metadata
	// +k8s:openapi-gen=false
	metav1.ObjectMeta `json:"metadata,omitempty"`
	// Specification of the desired behavior of the Alertmanager cluster. More info:
	// https://github.com/kubernetes/community/blob/master/contributors/devel/api-conventions.md#spec-and-status
	Spec AlertmanagerSpec `json:"spec"`
	// Most recent observed status of the Alertmanager cluster. Read-only. Not
	// included when requesting from the apiserver, only from the Prometheus
	// Operator API itself. More info:
	// https://github.com/kubernetes/community/blob/master/contributors/devel/api-conventions.md#spec-and-status
	Status *AlertmanagerStatus `json:"status,omitempty"`
}

// AlertmanagerSpec is a specification of the desired behavior of the Alertmanager cluster. More info:
// https://github.com/kubernetes/community/blob/master/contributors/devel/api-conventions.md#spec-and-status
// +k8s:openapi-gen=true
type AlertmanagerSpec struct {
	// Standard object’s metadata. More info:
	// https://github.com/kubernetes/community/blob/master/contributors/devel/api-conventions.md#metadata
	// Metadata Labels and Annotations gets propagated to the prometheus pods.
	PodMetadata *metav1.ObjectMeta `json:"podMetadata,omitempty"`
	// Image if specified has precedence over baseImage, tag and sha
	// combinations. Specifying the version is still necessary to ensure the
	// Prometheus Operator knows what version of Alertmanager is being
	// configured.
	Image *string `json:"image,omitempty"`
	// Version the cluster should be on.
	Version string `json:"version,omitempty"`
	// Tag of Alertmanager container image to be deployed. Defaults to the value of `version`.
	// Version is ignored if Tag is set.
	Tag string `json:"tag,omitempty"`
	// SHA of Alertmanager container image to be deployed. Defaults to the value of `version`.
	// Similar to a tag, but the SHA explicitly deploys an immutable container image.
	// Version and Tag are ignored if SHA is set.
	SHA string `json:"sha,omitempty"`
	// Base image that is used to deploy pods, without tag.
	BaseImage string `json:"baseImage,omitempty"`
	// An optional list of references to secrets in the same namespace
	// to use for pulling prometheus and alertmanager images from registries
	// see http://kubernetes.io/docs/user-guide/images#specifying-imagepullsecrets-on-a-pod
	ImagePullSecrets []v1.LocalObjectReference `json:"imagePullSecrets,omitempty"`
	// Secrets is a list of Secrets in the same namespace as the Alertmanager
	// object, which shall be mounted into the Alertmanager Pods.
	// The Secrets are mounted into /etc/alertmanager/secrets/<secret-name>.
	Secrets []string `json:"secrets,omitempty"`
	// ConfigMaps is a list of ConfigMaps in the same namespace as the Alertmanager
	// object, which shall be mounted into the Alertmanager Pods.
	// The ConfigMaps are mounted into /etc/alertmanager/configmaps/<configmap-name>.
	ConfigMaps []string `json:"configMaps,omitempty"`
	// Log level for Alertmanager to be configured with.
	LogLevel string `json:"logLevel,omitempty"`
	// Log format for Alertmanager to be configured with.
	LogFormat string `json:"logFormat,omitempty"`
	// Size is the expected size of the alertmanager cluster. The controller will
	// eventually make the size of the running cluster equal to the expected
	// size.
	Replicas *int32 `json:"replicas,omitempty"`
	// Time duration Alertmanager shall retain data for. Default is '120h',
	// and must match the regular expression `[0-9]+(ms|s|m|h)` (milliseconds seconds minutes hours).
	Retention string `json:"retention,omitempty"`
	// Storage is the definition of how storage will be used by the Alertmanager
	// instances.
	Storage *StorageSpec `json:"storage,omitempty"`
	// The external URL the Alertmanager instances will be available under. This is
	// necessary to generate correct URLs. This is necessary if Alertmanager is not
	// served from root of a DNS name.
	ExternalURL string `json:"externalUrl,omitempty"`
	// The route prefix Alertmanager registers HTTP handlers for. This is useful,
	// if using ExternalURL and a proxy is rewriting HTTP routes of a request,
	// and the actual ExternalURL is still true, but the server serves requests
	// under a different route prefix. For example for use with `kubectl proxy`.
	RoutePrefix string `json:"routePrefix,omitempty"`
	// If set to true all actions on the underlaying managed objects are not
	// goint to be performed, except for delete actions.
	Paused bool `json:"paused,omitempty"`
	// Define which Nodes the Pods are scheduled on.
	NodeSelector map[string]string `json:"nodeSelector,omitempty"`
	// Define resources requests and limits for single Pods.
	Resources v1.ResourceRequirements `json:"resources,omitempty"`
	// If specified, the pod's scheduling constraints.
	Affinity *v1.Affinity `json:"affinity,omitempty"`
	// If specified, the pod's tolerations.
	Tolerations []v1.Toleration `json:"tolerations,omitempty"`
	// SecurityContext holds pod-level security attributes and common container settings.
	// This defaults to the default PodSecurityContext.
	SecurityContext *v1.PodSecurityContext `json:"securityContext,omitempty"`
	// ServiceAccountName is the name of the ServiceAccount to use to run the
	// Prometheus Pods.
	ServiceAccountName string `json:"serviceAccountName,omitempty"`
	// ListenLocal makes the Alertmanager server listen on loopback, so that it
	// does not bind against the Pod IP. Note this is only for the Alertmanager
	// UI, not the gossip communication.
	ListenLocal bool `json:"listenLocal,omitempty"`
	// Containers allows injecting additional containers. This is meant to
	// allow adding an authentication proxy to an Alertmanager pod.
	Containers []v1.Container `json:"containers,omitempty"`
	// Priority class assigned to the Pods
	PriorityClassName string `json:"priorityClassName,omitempty"`
	// AdditionalPeers allows injecting a set of additional Alertmanagers to peer with to form a highly available cluster.
	AdditionalPeers []string `json:"additionalPeers,omitempty"`
}

// AlertmanagerList is a list of Alertmanagers.
// +k8s:openapi-gen=true
type AlertmanagerList struct {
	metav1.TypeMeta `json:",inline"`
	// Standard list metadata
	// More info: https://github.com/kubernetes/community/blob/master/contributors/devel/api-conventions.md#metadata
	metav1.ListMeta `json:"metadata,omitempty"`
	// List of Alertmanagers
	Items []Alertmanager `json:"items"`
}

// AlertmanagerStatus is the most recent observed status of the Alertmanager cluster. Read-only. Not
// included when requesting from the apiserver, only from the Prometheus
// Operator API itself. More info:
// https://github.com/kubernetes/community/blob/master/contributors/devel/api-conventions.md#spec-and-status
// +k8s:openapi-gen=true
type AlertmanagerStatus struct {
	// Represents whether any actions on the underlaying managed objects are
	// being performed. Only delete actions will be performed.
	Paused bool `json:"paused"`
	// Total number of non-terminated pods targeted by this Alertmanager
	// cluster (their labels match the selector).
	Replicas int32 `json:"replicas"`
	// Total number of non-terminated pods targeted by this Alertmanager
	// cluster that have the desired version spec.
	UpdatedReplicas int32 `json:"updatedReplicas"`
	// Total number of available pods (ready for at least minReadySeconds)
	// targeted by this Alertmanager cluster.
	AvailableReplicas int32 `json:"availableReplicas"`
	// Total number of unavailable pods targeted by this Alertmanager cluster.
	UnavailableReplicas int32 `json:"unavailableReplicas"`
}

// NamespaceSelector is a selector for selecting either all namespaces or a
// list of namespaces.
// +k8s:openapi-gen=true
type NamespaceSelector struct {
	// Boolean describing whether all namespaces are selected in contrast to a
	// list restricting them.
	Any bool `json:"any,omitempty"`
	// List of namespace names.
	MatchNames []string `json:"matchNames,omitempty"`

	// TODO(fabxc): this should embed metav1.LabelSelector eventually.
	// Currently the selector is only used for namespaces which require more complex
	// implementation to support label selections.
}

// /--rules.*/ command-line arguments
// +k8s:openapi-gen=true
type Rules struct {
	Alert RulesAlert `json:"alert,omitempty"`
}

// /--rules.alert.*/ command-line arguments
// +k8s:openapi-gen=true
type RulesAlert struct {
	// Max time to tolerate prometheus outage for restoring 'for' state of alert.
	ForOutageTolerance string `json:"forOutageTolerance,omitempty"`
	// Minimum duration between alert and restored 'for' state.
	// This is maintained only for alerts with configured 'for' time greater than grace period.
	ForGracePeriod string `json:"forGracePeriod,omitempty"`
	// Minimum amount of time to wait before resending an alert to Alertmanager.
	ResendDelay string `json:"resendDelay,omitempty"`
}

// DeepCopyObject implements the runtime.Object interface.
func (l *Alertmanager) DeepCopyObject() runtime.Object {
	return l.DeepCopy()
}

// DeepCopyObject implements the runtime.Object interface.
func (l *AlertmanagerList) DeepCopyObject() runtime.Object {
	return l.DeepCopy()
}

// DeepCopyObject implements the runtime.Object interface.
func (l *Prometheus) DeepCopyObject() runtime.Object {
	return l.DeepCopy()
}

// DeepCopyObject implements the runtime.Object interface.
func (l *PrometheusList) DeepCopyObject() runtime.Object {
	return l.DeepCopy()
}

// DeepCopyObject implements the runtime.Object interface.
func (l *ServiceMonitor) DeepCopyObject() runtime.Object {
	return l.DeepCopy()
}

// DeepCopyObject implements the runtime.Object interface.
func (l *ServiceMonitorList) DeepCopyObject() runtime.Object {
	return l.DeepCopy()
}

// DeepCopyObject implements the runtime.Object interface.
func (f *PrometheusRule) DeepCopyObject() runtime.Object {
	return f.DeepCopy()
}

// DeepCopyObject implements the runtime.Object interface.
func (l *PrometheusRuleList) DeepCopyObject() runtime.Object {
	return l.DeepCopy()
}
