github.com/tompao/docker@v1.9.1/api/client/logs.go (about)

     1  package client
     2  
     3  import (
     4  	"encoding/json"
     5  	"fmt"
     6  	"net/url"
     7  	"time"
     8  
     9  	"github.com/docker/docker/api/types"
    10  	Cli "github.com/docker/docker/cli"
    11  	flag "github.com/docker/docker/pkg/mflag"
    12  	"github.com/docker/docker/pkg/timeutils"
    13  )
    14  
    15  var validDrivers = map[string]bool{
    16  	"json-file": true,
    17  	"journald":  true,
    18  }
    19  
    20  // CmdLogs fetches the logs of a given container.
    21  //
    22  // docker logs [OPTIONS] CONTAINER
    23  func (cli *DockerCli) CmdLogs(args ...string) error {
    24  	cmd := Cli.Subcmd("logs", []string{"CONTAINER"}, Cli.DockerCommands["logs"].Description, true)
    25  	follow := cmd.Bool([]string{"f", "-follow"}, false, "Follow log output")
    26  	since := cmd.String([]string{"-since"}, "", "Show logs since timestamp")
    27  	times := cmd.Bool([]string{"t", "-timestamps"}, false, "Show timestamps")
    28  	tail := cmd.String([]string{"-tail"}, "all", "Number of lines to show from the end of the logs")
    29  	cmd.Require(flag.Exact, 1)
    30  
    31  	cmd.ParseFlags(args, true)
    32  
    33  	name := cmd.Arg(0)
    34  
    35  	serverResp, err := cli.call("GET", "/containers/"+name+"/json", nil, nil)
    36  	if err != nil {
    37  		return err
    38  	}
    39  
    40  	var c types.ContainerJSON
    41  	if err := json.NewDecoder(serverResp.body).Decode(&c); err != nil {
    42  		return err
    43  	}
    44  
    45  	if !validDrivers[c.HostConfig.LogConfig.Type] {
    46  		return fmt.Errorf("\"logs\" command is supported only for \"json-file\" and \"journald\" logging drivers (got: %s)", c.HostConfig.LogConfig.Type)
    47  	}
    48  
    49  	v := url.Values{}
    50  	v.Set("stdout", "1")
    51  	v.Set("stderr", "1")
    52  
    53  	if *since != "" {
    54  		v.Set("since", timeutils.GetTimestamp(*since, time.Now()))
    55  	}
    56  
    57  	if *times {
    58  		v.Set("timestamps", "1")
    59  	}
    60  
    61  	if *follow {
    62  		v.Set("follow", "1")
    63  	}
    64  	v.Set("tail", *tail)
    65  
    66  	sopts := &streamOpts{
    67  		rawTerminal: c.Config.Tty,
    68  		out:         cli.out,
    69  		err:         cli.err,
    70  	}
    71  
    72  	_, err = cli.stream("GET", "/containers/"+name+"/logs?"+v.Encode(), sopts)
    73  	return err
    74  }