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Add ServiceMonitor to pkg (#7)
add ServiceMonitor to pkg
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‎Makefile‎

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generate: controller-gen
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$(CONTROLLER_GEN) object:headerFile=./hack/boilerplate.go.txt paths=./pkg/secret/...
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$(CONTROLLER_GEN) object:headerFile=./hack/boilerplate.go.txt paths=./pkg/volume/...
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$(CONTROLLER_GEN) object:headerFile=./hack/boilerplate.go.txt paths=./pkg/prometheus/...
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# find or download controller-gen
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# download controller-gen if necessary

‎pkg/prometheus/servicemonitor.go‎

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// Copyright © 2020 Banzai Cloud
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package prometheus
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import (
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v1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apimachinery/pkg/util/intstr"
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"sigs.k8s.io/controller-runtime/pkg/scheme"
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)
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const (
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ServiceMonitorsKind = "ServiceMonitor"
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ServiceMonitorName = "servicemonitors"
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ServiceMonitorKindKey = "servicemonitor"
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)
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var (
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// GroupVersion is group version used to register these objects
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GroupVersion = schema.GroupVersion{Group: "monitoring.coreos.com", Version: "v1"}
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// SchemeBuilder is used to add go types to the GroupVersionKind scheme
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SchemeBuilder = &scheme.Builder{GroupVersion: GroupVersion}
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// AddToScheme adds the types in this group-version to the given scheme.
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AddToScheme = SchemeBuilder.AddToScheme
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)
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func init() {
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SchemeBuilder.Register(&ServiceMonitor{}, &ServiceMonitorList{})
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}
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// +kubebuilder:object:root=true
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type ServiceMonitor struct {
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metav1.TypeMeta `json:",inline"`
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// Standard object’s metadata. More info:
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// https://github.com/kubernetes/community/blob/master/contributors/devel/api-conventions.md#metadata
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// +k8s:openapi-gen=false
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metav1.ObjectMeta `json:"metadata,omitempty"`
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// Specification of desired Service selection for target discrovery by
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// Prometheus.
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Spec ServiceMonitorSpec `json:"spec"`
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}
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// +kubebuilder:object:root=true
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type ServiceMonitorList struct {
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metav1.TypeMeta `json:",inline"`
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// Standard list metadata
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// More info: https://github.com/kubernetes/community/blob/master/contributors/devel/sig-architecture/api-conventions.md#metadata
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metav1.ListMeta `json:"metadata,omitempty"`
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// List of ServiceMonitors
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Items []*ServiceMonitor `json:"items"`
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}
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// +kubebuilder:object:generate=true
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type ServiceMonitorSpec struct {
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// The label to use to retrieve the job name from.
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JobLabel string `json:"jobLabel,omitempty"`
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// TargetLabels transfers labels on the Kubernetes Service onto the target.
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TargetLabels []string `json:"targetLabels,omitempty"`
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// PodTargetLabels transfers labels on the Kubernetes Pod onto the target.
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PodTargetLabels []string `json:"podTargetLabels,omitempty"`
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// A list of endpoints allowed as part of this ServiceMonitor.
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Endpoints []Endpoint `json:"endpoints"`
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// Selector to select Endpoints objects.
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Selector metav1.LabelSelector `json:"selector"`
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// Selector to select which namespaces the Endpoints objects are discovered from.
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NamespaceSelector NamespaceSelector `json:"namespaceSelector,omitempty"`
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// SampleLimit defines per-scrape limit on number of scraped samples that will be accepted.
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SampleLimit uint64 `json:"sampleLimit,omitempty"`
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}
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// +kubebuilder:object:generate=true
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type Endpoint struct {
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// Name of the service port this endpoint refers to. Mutually exclusive with targetPort.
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Port string `json:"port,omitempty"`
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// Name or number of the target port of the endpoint. Mutually exclusive with port.
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TargetPort *intstr.IntOrString `json:"targetPort,omitempty"`
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// HTTP path to scrape for metrics.
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Path string `json:"path,omitempty"`
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// HTTP scheme to use for scraping.
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Scheme string `json:"scheme,omitempty"`
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// Optional HTTP URL parameters
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Params map[string][]string `json:"params,omitempty"`
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// Interval at which metrics should be scraped
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Interval string `json:"interval,omitempty"`
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// Timeout after which the scrape is ended
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ScrapeTimeout string `json:"scrapeTimeout,omitempty"`
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// Certificate configuration to use when scraping the endpoint
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TLSConfig *TLSConfig `json:"tlsConfig,omitempty"`
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// File to read bearer token for scraping targets.
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BearerTokenFile string `json:"bearerTokenFile,omitempty"`
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// HonorLabels chooses the metric's labels on collisions with target labels.
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HonorLabels bool `json:"honorLabels,omitempty"`
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// BasicAuth allow an endpoint to authenticate over basic authentication
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// More info: https://prometheus.io/docs/operating/configuration/#endpoints
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BasicAuth *BasicAuth `json:"basicAuth,omitempty"`
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// MetricRelabelConfigs to apply to samples before ingestion.
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MetricRelabelConfigs []*RelabelConfig `json:"metricRelabelings,omitempty"`
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// RelabelConfigs to apply to samples before ingestion.
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// More info: https://prometheus.io/docs/prometheus/latest/configuration/configuration/#<relabel_config>
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RelabelConfigs []*RelabelConfig `json:"relabelings,omitempty"`
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// ProxyURL eg http://proxyserver:2195 Directs scrapes to proxy through this endpoint.
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ProxyURL *string `json:"proxyUrl,omitempty"`
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}
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// +kubebuilder:object:generate=true
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type TLSConfig struct {
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// The CA cert to use for the targets.
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CAFile string `json:"caFile,omitempty"`
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// The client cert file for the targets.
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CertFile string `json:"certFile,omitempty"`
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// The client key file for the targets.
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KeyFile string `json:"keyFile,omitempty"`
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// Used to verify the hostname for the targets.
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ServerName string `json:"serverName,omitempty"`
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// Disable target certificate validation.
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InsecureSkipVerify bool `json:"insecureSkipVerify,omitempty"`
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}
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// +kubebuilder:object:generate=true
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type BasicAuth struct {
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// The secret that contains the username for authenticate
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Username v1.SecretKeySelector `json:"username,omitempty"`
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// The secret that contains the password for authenticate
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Password v1.SecretKeySelector `json:"password,omitempty"`
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}
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// +kubebuilder:object:generate=true
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type RelabelConfig struct {
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//The source labels select values from existing labels. Their content is concatenated
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//using the configured separator and matched against the configured regular expression
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//for the replace, keep, and drop actions.
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SourceLabels []string `json:"sourceLabels,omitempty"`
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//Separator placed between concatenated source label values. default is ';'.
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Separator string `json:"separator,omitempty"`
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//Label to which the resulting value is written in a replace action.
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//It is mandatory for replace actions. Regex capture groups are available.
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TargetLabel string `json:"targetLabel,omitempty"`
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//Regular expression against which the extracted value is matched. defailt is '(.*)'
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Regex string `json:"regex,omitempty"`
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// Modulus to take of the hash of the source label values.
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Modulus uint64 `json:"modulus,omitempty"`
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//Replacement value against which a regex replace is performed if the
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//regular expression matches. Regex capture groups are available. Default is '$1'
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Replacement string `json:"replacement,omitempty"`
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// Action to perform based on regex matching. Default is 'replace'
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Action string `json:"action,omitempty"`
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}
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// +kubebuilder:object:generate=true
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type NamespaceSelector struct {
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// Boolean describing whether all namespaces are selected in contrast to a
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// list restricting them.
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Any bool `json:"any,omitempty"`
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// List of namespace names.
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MatchNames []string `json:"matchNames,omitempty"`
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}

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