github.com/flavio/docker@v0.1.3-0.20170117145210-f63d1a6eec47/daemon/logger/gcplogs/gcplogging_linux.go (about)

     1  // +build linux
     2  
     3  package gcplogs
     4  
     5  import (
     6  	"os"
     7  
     8  	"github.com/Sirupsen/logrus"
     9  	"github.com/docker/docker/dockerversion"
    10  	"github.com/docker/docker/pkg/homedir"
    11  )
    12  
    13  // ensureHomeIfIAmStatic ensure $HOME to be set if dockerversion.IAmStatic is "true".
    14  // See issue #29344: gcplogs segfaults (static binary)
    15  // If HOME is not set, logging.NewClient() will call os/user.Current() via oauth2/google.
    16  // However, in static binary, os/user.Current() leads to segfault due to a glibc issue that won't be fixed
    17  // in a short term. (golang/go#13470, https://sourceware.org/bugzilla/show_bug.cgi?id=19341)
    18  // So we forcibly set HOME so as to avoid call to os/user/Current()
    19  func ensureHomeIfIAmStatic() error {
    20  	// Note: dockerversion.IAmStatic and homedir.GetStatic() is only available for linux.
    21  	// So we need to use them in this gcplogging_linux.go rather than in gcplogging.go
    22  	if dockerversion.IAmStatic == "true" && os.Getenv("HOME") == "" {
    23  		home, err := homedir.GetStatic()
    24  		if err != nil {
    25  			return err
    26  		}
    27  		logrus.Warnf("gcplogs requires HOME to be set for static daemon binary. Forcibly setting HOME to %s.", home)
    28  		os.Setenv("HOME", home)
    29  	}
    30  	return nil
    31  }