import (
"bytes"
"context"
+ "crypto/tls"
"flag"
"fmt"
"io"
+ "net/http"
"net/url"
"os"
"os/exec"
"path/filepath"
"strings"
"syscall"
+ "time"
"git.arvados.org/arvados.git/lib/cmd"
"git.arvados.org/arvados.git/lib/controller/rpc"
"git.arvados.org/arvados.git/sdk/go/arvados"
)
+// logsCommand displays logs from a running container.
+type logsCommand struct {
+ ac *arvados.Client
+}
+
+func (lc logsCommand) RunCommand(prog string, args []string, stdin io.Reader, stdout, stderr io.Writer) int {
+ f := flag.NewFlagSet(prog, flag.ContinueOnError)
+ pollInterval := f.Duration("poll", time.Second*2, "minimum duration to wait before polling for new data")
+ if ok, code := cmd.ParseFlags(f, prog, args, "container-uuid", stderr); !ok {
+ return code
+ } else if f.NArg() < 1 {
+ fmt.Fprintf(stderr, "missing required argument: container-uuid (try -help)\n")
+ return 2
+ } else if f.NArg() > 1 {
+ fmt.Fprintf(stderr, "encountered extra arguments after container-uuid (try -help)\n")
+ return 2
+ }
+ target := f.Args()[0]
+
+ lc.ac = arvados.NewClientFromEnv()
+ lc.ac.Client = &http.Client{}
+ if lc.ac.Insecure {
+ lc.ac.Client.Transport = &http.Transport{
+ TLSClientConfig: &tls.Config{
+ InsecureSkipVerify: true}}
+ }
+
+ err := lc.tailf(target, stdout, stderr, *pollInterval)
+ if err != nil {
+ fmt.Fprintln(stderr, err)
+ return 1
+ }
+ return 0
+}
+
+func (lc *logsCommand) tailf(target string, stdout, stderr io.Writer, pollInterval time.Duration) error {
+ ctx, cancel := context.WithCancel(context.Background())
+ defer cancel()
+
+ rpcconn := rpcFromEnv()
+ ctrUUID, err := resolveToContainerUUID(rpcconn, target)
+ if err != nil {
+ return err
+ }
+ fmt.Fprintln(stderr, "connecting to container", ctrUUID)
+
+ var (
+ // files to display
+ watching = []string{"crunch-run.txt", "stderr.txt"}
+ // fnm => file offset of next byte to display
+ mark = map[string]int64{}
+ // fnm => current size of file reported by api
+ size = map[string]int64{}
+ // exit after fetching next log chunk
+ containerFinished = false
+ // has anything worked? (if so, retry after errors)
+ anySuccess = false
+ )
+
+poll:
+ for delay := pollInterval; ; time.Sleep(delay) {
+ // When /arvados/v1/containers/{uuid}/log_events is
+ // implemented, we'll wait here for the next
+ // server-sent event to tell us some updated file
+ // sizes. For now, we poll.
+ for _, fnm := range watching {
+ currentsize, _, err := lc.copyRange(ctx, ctrUUID, fnm, "0-0", nil)
+ if err != nil {
+ if !anySuccess {
+ return err
+ }
+ fmt.Fprintln(stderr, err)
+ delay = pollInterval
+ continue poll
+ }
+ size[fnm] = currentsize
+ if oldsize, seen := mark[fnm]; !seen && currentsize > 10000 {
+ mark[fnm] = currentsize - 10000
+ } else if !seen {
+ mark[fnm] = 0
+ } else if currentsize < oldsize {
+ // Log collection must have been
+ // emptied and reset.
+ fmt.Fprintln(stderr, "--- log restarted ---")
+ for fnm := range mark {
+ delete(mark, fnm)
+ }
+ delay = pollInterval
+ continue poll
+ }
+ }
+ newData := map[string]*bytes.Buffer{}
+ for _, fnm := range watching {
+ if size[fnm] > mark[fnm] {
+ newData[fnm] = &bytes.Buffer{}
+ _, n, err := lc.copyRange(ctx, ctrUUID, fnm, fmt.Sprintf("%d-", mark[fnm]), newData[fnm])
+ if err != nil {
+ fmt.Fprintln(stderr, err)
+ }
+ if n > 0 {
+ mark[fnm] += n
+ anySuccess = true
+ }
+ }
+ }
+ checkState := lc.display(stdout, stderr, watching, newData)
+ if containerFinished {
+ // If the caller specified a container request
+ // UUID and the container we were watching has
+ // been replaced by a new one, start watching
+ // logs from the new one. Otherwise, we're
+ // done.
+ if target == ctrUUID {
+ // caller specified container UUID
+ return nil
+ }
+ newUUID, err := resolveToContainerUUID(rpcconn, target)
+ if err != nil {
+ return err
+ }
+ if newUUID == ctrUUID {
+ // no further attempts
+ return nil
+ }
+ ctrUUID = newUUID
+ containerFinished = false
+ delay = 0
+ continue
+ }
+ if len(newData) > 0 {
+ delay = pollInterval
+ }
+ if len(newData) == 0 || checkState {
+ delay = delay * 2
+ if delay > pollInterval*5 {
+ delay = pollInterval * 5
+ }
+ ctr, err := rpcconn.ContainerGet(ctx, arvados.GetOptions{UUID: ctrUUID, Select: []string{"state"}})
+ if err != nil {
+ if !anySuccess {
+ return err
+ }
+ fmt.Fprintln(stderr, err)
+ delay = pollInterval
+ continue
+ }
+ if ctr.State == arvados.ContainerStateCancelled || ctr.State == arvados.ContainerStateComplete {
+ containerFinished = true
+ delay = 0
+ }
+ }
+ }
+ return nil
+}
+
+// Retrieve specified byte range (e.g., "12-34", "1234-") from given
+// fnm and write to out.
+//
+// If range is empty ("0-0"), out can be nil.
+//
+// Return values are current file size, bytes copied, error.
+//
+// If the file does not exist, return values are 0, 0, nil.
+func (lc *logsCommand) copyRange(ctx context.Context, uuid, fnm, byterange string, out io.Writer) (int64, int64, error) {
+ ctx, cancel := context.WithDeadline(ctx, time.Now().Add(20*time.Second))
+ defer cancel()
+ srcURL := url.URL{
+ Scheme: "https",
+ Host: lc.ac.APIHost,
+ Path: "/arvados/v1/containers/" + uuid + "/log/" + fnm,
+ }
+ req, err := http.NewRequestWithContext(ctx, http.MethodGet, srcURL.String(), nil)
+ if err != nil {
+ return 0, 0, err
+ }
+ req.Header.Set("Range", "bytes="+byterange)
+ req.Header.Set("Authorization", "Bearer "+lc.ac.AuthToken)
+ resp, err := lc.ac.Client.Do(req)
+ if err != nil {
+ return 0, 0, err
+ }
+ defer resp.Body.Close()
+ if resp.StatusCode == http.StatusNotFound {
+ return 0, 0, nil
+ }
+ if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusPartialContent {
+ return 0, 0, fmt.Errorf("error getting %s: %s", fnm, resp.Status)
+ }
+ var rstart, rend, rsize int64
+ _, err = fmt.Sscanf(resp.Header.Get("Content-Range"), "bytes %d-%d/%d", &rstart, &rend, &rsize)
+ if err != nil {
+ return 0, 0, fmt.Errorf("error parsing Content-Range header %q: %s", resp.Header.Get("Content-Range"), err)
+ }
+ if out == nil {
+ return rsize, 0, nil
+ }
+ n, err := io.Copy(out, resp.Body)
+ return rsize, n, err
+}
+
+// display some log data, formatted as desired (prefixing each line
+// with a tag indicating which file it came from, etc.).
+//
+// Return value is true if the log data contained a hint that it's a
+// good time to check whether the container is finished so we can
+// exit.
+func (lc *logsCommand) display(out, stderr io.Writer, watching []string, received map[string]*bytes.Buffer) bool {
+ checkState := false
+ for _, fnm := range watching {
+ buf := received[fnm]
+ if buf == nil || buf.Len() == 0 {
+ continue
+ }
+ for _, line := range bytes.Split(bytes.TrimSuffix(buf.Bytes(), []byte{'\n'}), []byte{'\n'}) {
+ _, err := fmt.Fprintf(out, "%-14s %s\n", fnm, line)
+ if err != nil {
+ fmt.Fprintln(stderr, err)
+ }
+ checkState = checkState ||
+ bytes.HasSuffix(line, []byte("Complete")) ||
+ bytes.HasSuffix(line, []byte("Cancelled")) ||
+ bytes.HasSuffix(line, []byte("Queued"))
+ }
+ }
+ return checkState
+}
+
// shellCommand connects the terminal to an interactive shell on a
// running container.
type shellCommand struct{}
fmt.Fprintln(stderr, "fatal: ARVADOS_API_HOST and ARVADOS_API_TOKEN environment variables are not set")
return 1
}
- insecure := os.Getenv("ARVADOS_API_HOST_INSECURE")
- rpcconn := rpc.NewConn("",
- &url.URL{
- Scheme: "https",
- Host: os.Getenv("ARVADOS_API_HOST"),
- },
- insecure == "1" || insecure == "yes" || insecure == "true",
- func(context.Context) ([]string, error) {
- return []string{os.Getenv("ARVADOS_API_TOKEN")}, nil
- })
- if strings.Contains(targetUUID, "-xvhdp-") {
- crs, err := rpcconn.ContainerRequestList(context.TODO(), arvados.ListOptions{Limit: -1, Filters: []arvados.Filter{{"uuid", "=", targetUUID}}})
- if err != nil {
- fmt.Fprintln(stderr, err)
- return 1
- }
- if len(crs.Items) < 1 {
- fmt.Fprintf(stderr, "container request %q not found\n", targetUUID)
- return 1
- }
- cr := crs.Items[0]
- if cr.ContainerUUID == "" {
- fmt.Fprintf(stderr, "no container assigned, container request state is %s\n", strings.ToLower(string(cr.State)))
- return 1
- }
- targetUUID = cr.ContainerUUID
- fmt.Fprintln(stderr, "connecting to container", targetUUID)
- } else if !strings.Contains(targetUUID, "-dz642-") {
- fmt.Fprintf(stderr, "target UUID is not a container or container request UUID: %s\n", targetUUID)
+ rpcconn := rpcFromEnv()
+ targetUUID, err := resolveToContainerUUID(rpcconn, targetUUID)
+ if err != nil {
+ fmt.Fprintln(stderr, err)
return 1
}
+ fmt.Fprintln(stderr, "connecting to container", targetUUID)
+
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
sshconn, err := rpcconn.ContainerSSH(ctx, arvados.ContainerSSHOptions{
func shellescape(s string) string {
return "'" + strings.Replace(s, "'", "'\\''", -1) + "'"
}
+
+func rpcFromEnv() *rpc.Conn {
+ insecure := os.Getenv("ARVADOS_API_HOST_INSECURE")
+ return rpc.NewConn("",
+ &url.URL{
+ Scheme: "https",
+ Host: os.Getenv("ARVADOS_API_HOST"),
+ },
+ insecure == "1" || insecure == "yes" || insecure == "true",
+ func(context.Context) ([]string, error) {
+ return []string{os.Getenv("ARVADOS_API_TOKEN")}, nil
+ })
+}
+
+func resolveToContainerUUID(rpcconn *rpc.Conn, targetUUID string) (string, error) {
+ switch {
+ case strings.Contains(targetUUID, "-dz642-"):
+ return targetUUID, nil
+ case strings.Contains(targetUUID, "-xvhdp-"):
+ crs, err := rpcconn.ContainerRequestList(context.TODO(), arvados.ListOptions{Limit: -1, Filters: []arvados.Filter{{"uuid", "=", targetUUID}}})
+ if err != nil {
+ return "", err
+ }
+ if len(crs.Items) < 1 {
+ return "", fmt.Errorf("container request %q not found\n", targetUUID)
+ }
+ cr := crs.Items[0]
+ if cr.ContainerUUID == "" {
+ return "", fmt.Errorf("no container assigned, container request state is %s\n", strings.ToLower(string(cr.State)))
+ }
+ return cr.ContainerUUID, nil
+ default:
+ return "", fmt.Errorf("target UUID is not a container or container request UUID: %s\n", targetUUID)
+ }
+}
projects / arvados.git / blobdiff