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package main
import (
"fmt"
"time"
"github.com/projectatomic/libpod/libkpod"
"github.com/pkg/errors"
"github.com/urfave/cli"
)
var (
logsFlags = []cli.Flag{
cli.BoolFlag{
Name: "details",
Usage: "Show extra details provided to the logs",
Hidden: true,
},
cli.BoolFlag{
Name: "follow, f",
Usage: "Follow log output. The default is false",
},
cli.StringFlag{
Name: "since",
Usage: "Show logs since TIMESTAMP",
},
cli.Uint64Flag{
Name: "tail",
Usage: "Output the specified number of LINES at the end of the logs. Defaults to 0, which prints all lines",
},
}
logsDescription = "The kpod logs command batch-retrieves whatever logs are present for a container at the time of execution. This does not guarantee execution" +
"order when combined with kpod run (i.e. your run may not have generated any logs at the time you execute kpod logs"
logsCommand = cli.Command{
Name: "logs",
Usage: "Fetch the logs of a container",
Description: logsDescription,
Flags: logsFlags,
Action: logsCmd,
ArgsUsage: "CONTAINER",
}
)
func logsCmd(c *cli.Context) error {
args := c.Args()
if len(args) != 1 {
return errors.Errorf("'kpod logs' requires exactly one container name/ID")
}
if err := validateFlags(c, logsFlags); err != nil {
return err
}
container := c.Args().First()
var opts libkpod.LogOptions
opts.Details = c.Bool("details")
opts.Follow = c.Bool("follow")
opts.SinceTime = time.Time{}
if c.IsSet("since") {
// parse time, error out if something is wrong
since, err := time.Parse("2006-01-02T15:04:05.999999999-07:00", c.String("since"))
if err != nil {
return errors.Wrapf(err, "could not parse time: %q", c.String("since"))
}
opts.SinceTime = since
}
opts.Tail = c.Uint64("tail")
config, err := getConfig(c)
if err != nil {
return errors.Wrapf(err, "could not get config")
}
server, err := libkpod.New(config)
if err != nil {
return errors.Wrapf(err, "could not create container server")
}
defer server.Shutdown()
err = server.Update()
if err != nil {
return errors.Wrapf(err, "could not update list of containers")
}
logs := make(chan string)
go func() {
err = server.GetLogs(container, logs, opts)
}()
printLogs(logs)
return err
}
func printLogs(logs chan string) {
for line := range logs {
fmt.Println(line)
}
}
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