大佬教程收集整理的这篇文章主要介绍了linux – 如何在docker中成功启用udev同步?,大佬教程大佬觉得挺不错的,现在分享给大家,也给大家做个参考。
[root@localhost bin]# ./docker -d WARN[0000] Udev sync is not supported. This will lead to unexpected behavior,data loss and errors INFO[0000] +job init_networkdriver() INFO[0000] +job serveapi(unix:///var/run/docker.sock) INFO[0000] Listening for http on unix (/var/run/docker.sock) INFO[0000] -job init_networkdriver() = OK (0) INFO[0000] Loading containers: start. INFO[0000] Loading containers: done. INFO[0000] docker daemon: 1.6.1 97cd073; execdriver: native-0.2; graphdriver: devicemapper INFO[0000] +job acceptconnections() INFO[0000] -job acceptconnections() = OK (0) INFO[0000] Daemon has completed initialization
我可以看到有一个警告:“不支持Udev同步.这将导致意外行为,数据丢失和错误”,并且在检查docker源代码后,我发现警告日志来自deviceset.go:
func (devices *DeviceSet) initDevmapper(doInit bool) error { ...... // https://github.com/docker/docker/issues/4036 if supported := devicemapper.UdevSetSyncSupport(true); !supported { log.Warnf("Udev sync is not supported. This will lead to unexpected behavior,data loss and errors") } log.Debugf("devicemapper: udev sync support: %v",devicemapper.UdevSyncSupported()) ...... }
devicemapper.UdevSetSyncSupport是这样的:
// UdevSyncSupported returns whether device-mapper is able to sync with udev // // This is essential otherwise race conditions can arise where both udev and // device-mapper attempt to create and destroy devices. func UdevSyncSupported() bool { return DmUdevGetSyncSupport() != 0 } // UdevSetSyncSupport allows setTing whether the udev sync should be enabled. // The return bool inDicates the state of whether the sync is enabled. func UdevSetSyncSupport(enable bool) bool { if enable { DmUdevSetSyncSupport(1) } else { DmUdevSetSyncSupport(0) } return UdevSyncSupported() }
我可以看到原因是启用udev同步失败.如何成功启用udev同步?
更新:
检查dm_udev_set_sync_support的反汇编代码后:
(gdb) disassemble dm_udev_set_sync_support Dump of assembler code for function dm_udev_set_sync_support: => 0x0000000000a3e4e0 <+0>: repz retq End of assembler dump.
(gdb) disassemble dm_udev_set_sync_support Dump of assembler code for function dm_udev_set_sync_support@plt: 0x0000000000403420 <+0>: jmpq *0xda8c92(%rip) # 0x11ac0b8 <dm_udev_set_sync_support@got.plt> 0x0000000000403426 <+6>: pushq $0x14 0x000000000040342b <+11>: jmpq 0x4032d0
帮自己一个忙:忽略docker.io所做的构建,直接从RHel获取Docker.它可以在Extras频道中找到.虽然它通常比上游版本落后几周(例如1.6而不是1.7),但它也经过了充分测试并保证实际工作.
以上是大佬教程为你收集整理的linux – 如何在docker中成功启用udev同步?全部内容,希望文章能够帮你解决linux – 如何在docker中成功启用udev同步?所遇到的程序开发问题。
如果觉得大佬教程网站内容还不错,欢迎将大佬教程推荐给程序员好友。
本图文内容来源于网友网络收集整理提供,作为学习参考使用,版权属于原作者。
如您有任何意见或建议可联系处理。小编QQ:384754419,请注明来意。