mirror of https://github.com/k3s-io/k3s
105 lines
2.5 KiB
Go
105 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 log
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import (
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"fmt"
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"io"
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"strings"
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"k8s.io/apimachinery/pkg/runtime"
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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/audit"
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)
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const (
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// FormatLegacy saves event in 1-line text format.
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FormatLegacy = "legacy"
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// FormatJson saves event in structured json format.
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FormatJson = "json"
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// PluginName is the name of this plugin, to be used in help and logs.
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PluginName = "log"
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)
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// AllowedFormats are the formats known by log backend.
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var AllowedFormats = []string{
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FormatLegacy,
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FormatJson,
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}
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type backend struct {
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out io.Writer
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format string
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groupVersion schema.GroupVersion
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}
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var _ audit.Backend = &backend{}
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func NewBackend(out io.Writer, format string, groupVersion schema.GroupVersion) audit.Backend {
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return &backend{
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out: out,
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format: format,
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groupVersion: groupVersion,
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}
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}
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func (b *backend) ProcessEvents(events ...*auditinternal.Event) bool {
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success := true
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for _, ev := range events {
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success = b.logEvent(ev) && success
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}
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return success
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}
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func (b *backend) logEvent(ev *auditinternal.Event) bool {
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line := ""
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switch b.format {
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case FormatLegacy:
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line = audit.EventString(ev) + "\n"
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case FormatJson:
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bs, err := runtime.Encode(audit.Codecs.LegacyCodec(b.groupVersion), ev)
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if err != nil {
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audit.HandlePluginError(PluginName, err, ev)
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return false
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}
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line = string(bs[:])
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default:
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audit.HandlePluginError(PluginName, fmt.Errorf("log format %q is not in list of known formats (%s)",
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b.format, strings.Join(AllowedFormats, ",")), ev)
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return false
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}
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if _, err := fmt.Fprint(b.out, line); err != nil {
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audit.HandlePluginError(PluginName, err, ev)
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return false
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}
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return true
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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) String() string {
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return PluginName
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}
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