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moby--moby/daemon/debugtrap.go
John Howard 4c62b12636 Spew debugging
Signed-off-by: John Howard <jhoward@microsoft.com>
2016-11-03 10:05:11 -07:00

33 lines
870 B
Go

package daemon
import (
"fmt"
"os"
"path/filepath"
"strings"
"time"
"github.com/davecgh/go-spew/spew"
"github.com/pkg/errors"
)
const dataStructuresLogNameTemplate = "daemon-data-%s.log"
// dumpDaemon appends the daemon datastructures into file in dir and returns full path
// to that file.
func (d *Daemon) dumpDaemon(dir string) (string, error) {
// Ensure we recover from a panic as we are doing this without any locking
defer func() {
recover()
}()
path := filepath.Join(dir, fmt.Sprintf(dataStructuresLogNameTemplate, strings.Replace(time.Now().Format(time.RFC3339), ":", "", -1)))
f, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY, 0666)
if err != nil {
return "", errors.Wrap(err, "failed to open file to write the daemon datastructure dump")
}
defer f.Close()
spew.Fdump(f, d) // Does not return an error
f.Sync()
return path, nil
}