package main import ( "bufio" "bytes" "context" "fmt" "io" "net/http" "strconv" "strings" "testing" "time" "github.com/docker/docker/api/types" "github.com/docker/docker/client" "github.com/docker/docker/pkg/stdcopy" "github.com/docker/docker/testutil/request" "gotest.tools/v3/assert" ) func (s *DockerAPISuite) TestLogsAPIWithStdout(c *testing.T) { 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, 1) 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 *DockerAPISuite) TestLogsAPINoStdoutNorStderr(c *testing.T) { name := "logs_test" dockerCmd(c, "run", "-d", "-t", "--name", name, "busybox", "/bin/sh") apiClient, err := client.NewClientWithOpts(client.FromEnv) assert.NilError(c, err) defer apiClient.Close() _, err = apiClient.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 *DockerAPISuite) TestLogsAPIFollowEmptyOutput(c *testing.T) { 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 *DockerAPISuite) TestLogsAPIContainerNotFound(c *testing.T) { 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 *DockerAPISuite) TestLogsAPIUntilFutureFollow(c *testing.T) { 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) stop := make(chan struct{}) defer close(stop) 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 } select { case <-stop: return case chLog <- logOut{"", err}: } return } select { case <-stop: return case 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 *DockerAPISuite) TestLogsAPIUntil(c *testing.T) { 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 *testing.T, cfg types.ContainerLogsOptions) []string { reader, err := client.ContainerLogs(context.Background(), name, cfg) assert.NilError(c, err) actualStdout := new(bytes.Buffer) actualStderr := io.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 *DockerAPISuite) TestLogsAPIUntilDefaultValue(c *testing.T) { 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 *testing.T, cfg types.ContainerLogsOptions) []string { reader, err := client.ContainerLogs(context.Background(), name, cfg) assert.NilError(c, err) actualStdout := new(bytes.Buffer) actualStderr := io.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) }