mirror of
https://github.com/kubernetes/node-problem-detector.git
synced 2026-02-19 20:40:07 +00:00
87 lines
2.4 KiB
Go
87 lines
2.4 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors All rights reserved.
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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 translator
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import (
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"fmt"
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"strconv"
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"strings"
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"k8s.io/node-problem-detector/pkg/kernelmonitor/types"
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)
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// Translator translates a log line into types.KernelLog, so that kernel monitor
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// could parse it whatever the original format is.
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type Translator interface {
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// Translate translates one log line into types.KernelLog.
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Translate(string) (*types.KernelLog, error)
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}
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// defaultTranslator works well for ubuntu and debian, but may not work well with
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// other os distros. However it is easy to add a new translator for new os distro.
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type defaultTranslator struct{}
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// NewDefaultTranslator creates a default translator.
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func NewDefaultTranslator() Translator {
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return &defaultTranslator{}
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}
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func (t *defaultTranslator) Translate(line string) (*types.KernelLog, error) {
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timestr, message, err := parseLine(line)
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if err != nil {
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return nil, err
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}
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timestamp, err := parseTimestamp(timestr)
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if err != nil {
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return nil, err
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}
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return &types.KernelLog{
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Timestamp: timestamp,
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Message: message,
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}, nil
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}
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func parseLine(line string) (string, string, error) {
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// Example line: Jan 1 00:00:00 hostname kernel: [0.000000] component: log message
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timestampPrefix := "kernel: ["
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timestampSuffix := "]"
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idx := strings.Index(line, timestampPrefix)
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if idx == -1 {
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return "", "", fmt.Errorf("can't find timestamp prefix %q in line %q", timestampPrefix, line)
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}
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line = line[idx+len(timestampPrefix):]
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idx = strings.Index(line, timestampSuffix)
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if idx == -1 {
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return "", "", fmt.Errorf("can't find timestamp suffix %q in line %q", timestampSuffix, line)
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}
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timestamp := strings.Trim(line[:idx], " ")
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message := strings.Trim(line[idx+1:], " ")
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return timestamp, message, nil
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}
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func parseTimestamp(timestamp string) (int64, error) {
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f, err := strconv.ParseFloat(timestamp, 64)
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if err != nil {
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return 0, err
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}
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// seconds to microseconds
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return int64(f * 1000000), nil
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}
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