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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package cmd
import (
"fmt"
"time"
"github.com/spf13/cobra"
"github.com/vespa-engine/vespa/client/go/vespa"
)
var (
fromArg string
toArg string
levelArg string
followArg bool
dequoteArg bool
)
func init() {
rootCmd.AddCommand(logCmd)
logCmd.Flags().StringVarP(&fromArg, "from", "F", "", "Include logs since this timestamp (RFC3339 format)")
logCmd.Flags().StringVarP(&toArg, "to", "T", "", "Include logs until this timestamp (RFC3339 format)")
logCmd.Flags().StringVarP(&levelArg, "level", "l", "debug", `The maximum log level to show. Must be "error", "warning", "info" or "debug"`)
logCmd.Flags().BoolVarP(&followArg, "follow", "f", false, "Follow logs")
logCmd.Flags().BoolVarP(&dequoteArg, "nldequote", "n", true, "Dequote LF and TAB characters in log messages")
}
var logCmd = &cobra.Command{
Use: "log [relative-period]",
Short: "Show the Vespa log",
Long: `Show the Vespa log.
The logs shown can be limited to a relative or fixed period. All timestamps are shown in UTC.
`,
Example: `$ vespa log 1h
$ vespa log --nldequote=false 10m
$ vespa log --from 2021-08-25T15:00:00Z --to 2021-08-26T02:00:00Z
$ vespa log --follow`,
DisableAutoGenTag: true,
Args: cobra.MaximumNArgs(1),
Run: func(cmd *cobra.Command, args []string) {
target := getTarget()
options := vespa.LogOptions{
Level: vespa.LogLevel(levelArg),
Follow: followArg,
Writer: stdout,
Dequote: dequoteArg,
}
if options.Follow {
if fromArg != "" || toArg != "" || len(args) > 0 {
fatalErr(fmt.Errorf("cannot combine --from/--to or relative time with --follow"), "Could not follow logs")
}
options.From = time.Now().Add(-5 * time.Minute)
} else {
from, to, err := parsePeriod(args)
if err != nil {
fatalErr(err, "Invalid period")
return
}
options.From = from
options.To = to
}
if err := target.PrintLog(options); err != nil {
fatalErr(err, "Could not retrieve logs")
}
},
}
func parsePeriod(args []string) (time.Time, time.Time, error) {
if len(args) == 1 {
if fromArg != "" || toArg != "" {
return time.Time{}, time.Time{}, fmt.Errorf("cannot combine --from/--to with relative value: %s", args[0])
}
d, err := time.ParseDuration(args[0])
if err != nil {
return time.Time{}, time.Time{}, err
}
if d > 0 {
d = -d
}
to := time.Now()
from := to.Add(d)
return from, to, nil
}
from, err := time.Parse(time.RFC3339, fromArg)
if err != nil {
return time.Time{}, time.Time{}, err
}
to, err := time.Parse(time.RFC3339, toArg)
if err != nil {
return time.Time{}, time.Time{}, err
}
if !to.After(from) {
return time.Time{}, time.Time{}, fmt.Errorf("--to must specify a time after --from")
}
return from, to, nil
}
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