github.com/demonoid81/moby@v0.0.0-20200517203328-62dd8e17c460/daemon/logger/gcplogs/gcplogging_linux.go (about)

     1  package gcplogs // import "github.com/demonoid81/moby/daemon/logger/gcplogs"
     2  
     3  import (
     4  	"os"
     5  
     6  	"github.com/demonoid81/moby/dockerversion"
     7  	"github.com/demonoid81/moby/pkg/homedir"
     8  	"github.com/sirupsen/logrus"
     9  )
    10  
    11  // ensureHomeIfIAmStatic ensure $HOME to be set if dockerversion.IAmStatic is "true".
    12  // See issue #29344: gcplogs segfaults (static binary)
    13  // If HOME is not set, logging.NewClient() will call os/user.Current() via oauth2/google.
    14  // If compiling statically, make sure osusergo build tag is also used to prevent a segfault
    15  // due to a glibc issue that won't be fixed in a short term
    16  // (see golang/go#13470, https://sourceware.org/bugzilla/show_bug.cgi?id=19341).
    17  // So we forcibly set HOME so as to avoid call to os/user/Current()
    18  func ensureHomeIfIAmStatic() error {
    19  	// Note: dockerversion.IAmStatic is only available for linux.
    20  	// So we need to use them in this gcplogging_linux.go rather than in gcplogging.go
    21  	if dockerversion.IAmStatic == "true" && os.Getenv("HOME") == "" {
    22  		home := homedir.Get()
    23  		logrus.Warnf("gcplogs requires HOME to be set for static daemon binary. Forcibly setting HOME to %s.", home)
    24  		os.Setenv("HOME", home)
    25  	}
    26  	return nil
    27  }