mirror of
https://github.com/kubernetes-sigs/prometheus-adapter.git
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a293b2bf94
Travis seems to be having issues pulling deps, so we'll have to check in the vendor directory and prevent the makefile from trying to regenerate it normally.
88 lines
2.5 KiB
Go
88 lines
2.5 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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// Package webhook implements the audit.Backend interface using HTTP webhooks.
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package webhook
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import (
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"time"
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"k8s.io/apimachinery/pkg/runtime/schema"
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auditinternal "k8s.io/apiserver/pkg/apis/audit"
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"k8s.io/apiserver/pkg/apis/audit/install"
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"k8s.io/apiserver/pkg/audit"
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"k8s.io/apiserver/pkg/util/webhook"
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"k8s.io/client-go/rest"
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)
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const (
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// PluginName is the name of this plugin, to be used in help and logs.
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PluginName = "webhook"
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// DefaultInitialBackoff is the default amount of time to wait before
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// retrying sending audit events through a webhook.
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DefaultInitialBackoff = 10 * time.Second
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)
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func init() {
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install.Install(audit.Scheme)
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}
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func loadWebhook(configFile string, groupVersion schema.GroupVersion, initialBackoff time.Duration) (*webhook.GenericWebhook, error) {
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return webhook.NewGenericWebhook(audit.Scheme, audit.Codecs, configFile,
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[]schema.GroupVersion{groupVersion}, initialBackoff)
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}
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type backend struct {
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w *webhook.GenericWebhook
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}
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// NewBackend returns an audit backend that sends events over HTTP to an external service.
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func NewBackend(kubeConfigFile string, groupVersion schema.GroupVersion, initialBackoff time.Duration) (audit.Backend, error) {
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w, err := loadWebhook(kubeConfigFile, groupVersion, initialBackoff)
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if err != nil {
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return nil, err
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}
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return &backend{w}, nil
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}
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func (b *backend) Run(stopCh <-chan struct{}) error {
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return nil
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}
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func (b *backend) Shutdown() {
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// nothing to do here
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}
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func (b *backend) ProcessEvents(ev ...*auditinternal.Event) {
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if err := b.processEvents(ev...); err != nil {
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audit.HandlePluginError(PluginName, err, ev...)
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}
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}
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func (b *backend) processEvents(ev ...*auditinternal.Event) error {
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var list auditinternal.EventList
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for _, e := range ev {
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list.Items = append(list.Items, *e)
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}
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return b.w.WithExponentialBackoff(func() rest.Result {
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return b.w.RestClient.Post().Body(&list).Do()
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}).Error()
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}
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func (b *backend) String() string {
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return PluginName
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}
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