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package main
import (
"bufio"
"bytes"
"context"
"fmt"
"io"
"io/ioutil"
"net/http"
"strconv"
"strings"
"time"
"github.com/docker/docker/api/types"
"github.com/docker/docker/client"
"github.com/docker/docker/internal/test/request"
"github.com/docker/docker/pkg/stdcopy"
"github.com/go-check/check"
"gotest.tools/assert"
)
func (s *DockerSuite) TestLogsAPIWithStdout(c *check.C) {
out, _ := dockerCmd(c, "run", "-d", "-t", "busybox", "/bin/sh", "-c", "while true; do echo hello; sleep 1; done")
id := strings.TrimSpace(out)
assert.NilError(c, waitRun(id))
type logOut struct {
out string
err error
}
chLog := make(chan logOut)
res, body, err := request.Get(fmt.Sprintf("/containers/%s/logs?follow=1&stdout=1×tamps=1", id))
assert.NilError(c, err)
assert.Equal(c, res.StatusCode, http.StatusOK)
go func() {
defer body.Close()
out, err := bufio.NewReader(body).ReadString('\n')
if err != nil {
chLog <- logOut{"", err}
return
}
chLog <- logOut{strings.TrimSpace(out), err}
}()
select {
case l := <-chLog:
assert.NilError(c, l.err)
if !strings.HasSuffix(l.out, "hello") {
c.Fatalf("expected log output to container 'hello', but it does not")
}
case <-time.After(30 * time.Second):
c.Fatal("timeout waiting for logs to exit")
}
}
func (s *DockerSuite) TestLogsAPINoStdoutNorStderr(c *check.C) {
name := "logs_test"
dockerCmd(c, "run", "-d", "-t", "--name", name, "busybox", "/bin/sh")
cli, err := client.NewClientWithOpts(client.FromEnv)
assert.NilError(c, err)
defer cli.Close()
_, err = cli.ContainerLogs(context.Background(), name, types.ContainerLogsOptions{})
assert.ErrorContains(c, err, "Bad parameters: you must choose at least one stream")
}
// Regression test for #12704
func (s *DockerSuite) TestLogsAPIFollowEmptyOutput(c *check.C) {
name := "logs_test"
t0 := time.Now()
dockerCmd(c, "run", "-d", "-t", "--name", name, "busybox", "sleep", "10")
_, body, err := request.Get(fmt.Sprintf("/containers/%s/logs?follow=1&stdout=1&stderr=1&tail=all", name))
t1 := time.Now()
assert.NilError(c, err)
body.Close()
elapsed := t1.Sub(t0).Seconds()
if elapsed > 20.0 {
c.Fatalf("HTTP response was not immediate (elapsed %.1fs)", elapsed)
}
}
func (s *DockerSuite) TestLogsAPIContainerNotFound(c *check.C) {
name := "nonExistentContainer"
resp, _, err := request.Get(fmt.Sprintf("/containers/%s/logs?follow=1&stdout=1&stderr=1&tail=all", name))
assert.NilError(c, err)
assert.Equal(c, resp.StatusCode, http.StatusNotFound)
}
func (s *DockerSuite) TestLogsAPIUntilFutureFollow(c *check.C) {
testRequires(c, DaemonIsLinux)
name := "logsuntilfuturefollow"
dockerCmd(c, "run", "-d", "--name", name, "busybox", "/bin/sh", "-c", "while true; do date +%s; sleep 1; done")
assert.NilError(c, waitRun(name))
untilSecs := 5
untilDur, err := time.ParseDuration(fmt.Sprintf("%ds", untilSecs))
assert.NilError(c, err)
until := daemonTime(c).Add(untilDur)
client, err := client.NewClientWithOpts(client.FromEnv)
if err != nil {
c.Fatal(err)
}
cfg := types.ContainerLogsOptions{Until: until.Format(time.RFC3339Nano), Follow: true, ShowStdout: true, Timestamps: true}
reader, err := client.ContainerLogs(context.Background(), name, cfg)
assert.NilError(c, err)
type logOut struct {
out string
err error
}
chLog := make(chan logOut)
go func() {
bufReader := bufio.NewReader(reader)
defer reader.Close()
for i := 0; i < untilSecs; i++ {
out, _, err := bufReader.ReadLine()
if err != nil {
if err == io.EOF {
return
}
chLog <- logOut{"", err}
return
}
chLog <- logOut{strings.TrimSpace(string(out)), err}
}
}()
for i := 0; i < untilSecs; i++ {
select {
case l := <-chLog:
assert.NilError(c, l.err)
i, err := strconv.ParseInt(strings.Split(l.out, " ")[1], 10, 64)
assert.NilError(c, err)
assert.Assert(c, time.Unix(i, 0).UnixNano() <= until.UnixNano())
case <-time.After(20 * time.Second):
c.Fatal("timeout waiting for logs to exit")
}
}
}
func (s *DockerSuite) TestLogsAPIUntil(c *check.C) {
testRequires(c, MinimumAPIVersion("1.34"))
name := "logsuntil"
dockerCmd(c, "run", "--name", name, "busybox", "/bin/sh", "-c", "for i in $(seq 1 3); do echo log$i; sleep 1; done")
client, err := client.NewClientWithOpts(client.FromEnv)
if err != nil {
c.Fatal(err)
}
extractBody := func(c *check.C, cfg types.ContainerLogsOptions) []string {
reader, err := client.ContainerLogs(context.Background(), name, cfg)
assert.NilError(c, err)
actualStdout := new(bytes.Buffer)
actualStderr := ioutil.Discard
_, err = stdcopy.StdCopy(actualStdout, actualStderr, reader)
assert.NilError(c, err)
return strings.Split(actualStdout.String(), "\n")
}
// Get timestamp of second log line
allLogs := extractBody(c, types.ContainerLogsOptions{Timestamps: true, ShowStdout: true})
assert.Assert(c, len(allLogs) >= 3)
t, err := time.Parse(time.RFC3339Nano, strings.Split(allLogs[1], " ")[0])
assert.NilError(c, err)
until := t.Format(time.RFC3339Nano)
// Get logs until the timestamp of second line, i.e. first two lines
logs := extractBody(c, types.ContainerLogsOptions{Timestamps: true, ShowStdout: true, Until: until})
// Ensure log lines after cut-off are excluded
logsString := strings.Join(logs, "\n")
assert.Assert(c, !strings.Contains(logsString, "log3"), "unexpected log message returned, until=%v", until)
}
func (s *DockerSuite) TestLogsAPIUntilDefaultValue(c *check.C) {
name := "logsuntildefaultval"
dockerCmd(c, "run", "--name", name, "busybox", "/bin/sh", "-c", "for i in $(seq 1 3); do echo log$i; done")
client, err := client.NewClientWithOpts(client.FromEnv)
if err != nil {
c.Fatal(err)
}
extractBody := func(c *check.C, cfg types.ContainerLogsOptions) []string {
reader, err := client.ContainerLogs(context.Background(), name, cfg)
assert.NilError(c, err)
actualStdout := new(bytes.Buffer)
actualStderr := ioutil.Discard
_, err = stdcopy.StdCopy(actualStdout, actualStderr, reader)
assert.NilError(c, err)
return strings.Split(actualStdout.String(), "\n")
}
// Get timestamp of second log line
allLogs := extractBody(c, types.ContainerLogsOptions{Timestamps: true, ShowStdout: true})
// Test with default value specified and parameter omitted
defaultLogs := extractBody(c, types.ContainerLogsOptions{Timestamps: true, ShowStdout: true, Until: "0"})
assert.DeepEqual(c, defaultLogs, allLogs)
}
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