我正在解决一个问题。需要帮助调试内核启动或打开控制台以在启动期间查看日志。
我正在运行 rhel 7.9 机器，我正在使用leapp-upgrade 工具升级到 8.6。提示重新启动后，系统启动到升级内核并执行其操作。一段时间后，它卡住了并且不再继续。
从leapp重启过程中收集的日志文件，如果需要我可以发布更多：
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Dec 14 15:08:51 localhost systemd[1]: sysinit.target changed dead -> active
Dec 14 15:08:51 localhost systemd[1]: sysinit.target: Job sysinit.target/start finished, result=done
Dec 14 15:08:51 localhost systemd[1]: Reached target System Initialization.
Dec 14 15:08:51 localhost systemd[1]: basic.target changed dead -> active
Dec 14 15:08:51 localhost systemd[1]: basic.target: Job basic.target/start finished, result=done
Dec 14 15:08:51 localhost systemd[1]: Reached target Basic System.
Dec 14 15:08:51 localhost systemd[1]: BPF firewalling not supported on this manager, proceeding without.
Dec 14 15:08:51 localhost systemd[1]: sysroot.mount: About to execute: /usr/bin/mount /dev/disk/by-uuid/590fdbc8-05cb-4a67-b754-93ca34611494 /sysroot -o ro
Dec 14 15:08:51 localhost systemd[1]: sysroot.mount: Forked /usr/bin/mount as 1005
Dec 14 15:08:51 localhost systemd[1]: sysroot.mount: Changed dead -> mounting
Dec 14 15:08:51 localhost systemd[1]: Mounting /sysroot...
Dec 14 15:08:51 localhost systemd[1005]: sysroot.mount: Executing: /usr/bin/mount /dev/disk/by-uuid/590fdbc8-05cb-4a67-b754-93ca34611494 /sysroot -o ro
Dec 14 15:08:51 localhost systemd[1]: dracut-initqueue.service: ConditionKernelCommandLine=|rd.break=initqueue failed.
Dec 14 15:08:51 localhost systemd[1]: dracut-initqueue.service: ConditionPathExists=|/lib/dracut/need-initqueue succeeded.
Dec 14 15:08:51 localhost systemd[1]: dracut-initqueue.service: ConditionPathExists=/usr/lib/initrd-release succeeded.
Dec 14 15:08:51 localhost systemd[1]: BPF firewalling not supported on this manager, proceeding without.
Dec 14 15:08:51 localhost systemd[1]: dracut-initqueue.service: Passing 0 fds to service
Dec 14 15:08:51 localhost systemd[1]: dracut-initqueue.service: About to execute: /bin/dracut-initqueue
Dec 14 15:08:51 localhost systemd[1]: dracut-initqueue.service: Forked /bin/dracut-initqueue as 1006
Dec 14 15:08:51 localhost systemd[1]: dracut-initqueue.service: Changed dead -> start
Dec 14 15:08:51 localhost systemd[1]: Starting dracut initqueue hook...
Dec 14 15:08:51 localhost systemd[1006]: dracut-initqueue.service: Executing: /bin/dracut-initqueue
Dec 14 15:08:51 localhost systemd-udevd[1016]: passed 127 byte device to netlink monitor 0x55b94c876240
Dec 14 15:08:51 localhost systemd-udevd[1017]: passed 130 byte device to netlink monitor 0x55b94c8fe0c0
Dec 14 15:08:51 localhost systemd[1]: systemd-journald.service: Got notification message from PID 714 (FDSTORE=1)
Dec 14 15:08:51 localhost systemd[1]: systemd-journald.service: Added fd 39 (n/a) to fd store.
Dec 14 15:08:51 localhost systemd[1]: systemd-journald.service: Got notification message from PID 714 (FDSTORE=1)
Dec 14 15:08:51 localhost systemd[1]: systemd-journald.service: Added fd 40 (n/a) to fd store.
Dec 14 15:08:51 localhost systemd[1]: systemd-journald.service: Got notification message from PID 714 (FDSTORE=1)
Dec 14 15:08:51 localhost systemd[1]: systemd-journald.service: Added fd 41 (n/a) to fd store.
Dec 14 15:08:51 localhost systemd[1]: Received SIGCHLD from PID 1006 (dracut-initqueu).
Dec 14 15:08:51 localhost systemd[1]: Child 1006 (dracut-initqueu) died (code=exited, status=0/SUCCESS)
Dec 14 15:08:51 localhost systemd[1]: dracut-initqueue.service: Child 1006 belongs to dracut-initqueue.service.
Dec 14 15:08:51 localhost systemd[1]: dracut-initqueue.service: Main process exited, code=exited, status=0/SUCCESS
Dec 14 15:08:51 localhost systemd[1]: dracut-initqueue.service: Changed start -> exited
Dec 14 15:08:51 localhost systemd[1]: dracut-initqueue.service: Job dracut-initqueue.service/start finished, result=done
Dec 14 15:08:51 localhost systemd[1]: Started dracut initqueue hook.
Dec 14 15:08:51 localhost systemd-udevd[1018]: passed 127 byte device to netlink monitor 0x55b94c8af050
Dec 14 15:08:51 localhost systemd[1]: Got cgroup empty notification for: /system.slice/dracut-initqueue.service
Dec 14 15:08:51 localhost systemd[1]: systemd-journald.service: Received EPOLLHUP on stored fd 40 (stored), closing.
Dec 14 15:08:51 localhost systemd[1]: systemd-journald.service: Received EPOLLHUP on stored fd 41 (stored), closing.
Dec 14 15:08:51 localhost systemd[1]: remote-fs-pre.target changed dead -> active
Dec 14 15:08:51 localhost systemd[1]: remote-fs-pre.target: Job remote-fs-pre.target/start finished, result=done
Dec 14 15:08:51 localhost systemd[1]: Reached target Remote File Systems (Pre).
Dec 14 15:08:51 localhost kernel: EXT4-fs (sda6): mounted filesystem with ordered data mode. Opts: (null)
Dec 14 15:08:51 localhost systemd[1]: sysroot.mount: Changed mounting -> mounting-done
Dec 14 15:08:51 localhost systemd[1]: Received SIGCHLD from PID 1005 (mount).
Dec 14 15:08:51 localhost systemd[1]: Child 1005 (mount) died (code=exited, status=0/SUCCESS)
Dec 14 15:08:51 localhost systemd[1]: sysroot.mount: Child 1005 belongs to sysroot.mount.
Dec 14 15:08:51 localhost systemd[1]: sysroot.mount: Mount process exited, code=exited status=0
Dec 14 15:08:51 localhost systemd[1]: sysroot.mount: Changed mounting-done -> mounted
Dec 14 15:08:51 localhost systemd[1]: sysroot.mount: Job sysroot.mount/start finished, result=done
Dec 14 15:08:51 localhost systemd[1]: Mounted /sysroot.
Dec 14 15:08:51 localhost systemd[1]: Got cgroup empty notification for: /system.slice/sysroot.mount
Dec 14 15:08:51 localhost systemd[1]: systemd-journald.service: Received EPOLLHUP on stored fd 39 (stored), closing.
Dec 14 15:08:51 localhost systemd[1]: upgrade.target changed dead -> active
Dec 14 15:08:51 localhost systemd[1]: upgrade.target: Job upgrade.target/start finished, result=done
Dec 14 15:08:51 localhost systemd[1]: Reached target System Upgrade.
Dec 14 15:08:51 localhost systemd[1]: BPF firewalling not supported on this manager, proceeding without.
Dec 14 15:08:51 localhost systemd[1]: upgrade.service: Passing 0 fds to service
Dec 14 15:08:51 localhost systemd[1]: upgrade.service: About to execute: /bin/upgrade
Dec 14 15:08:51 localhost systemd[1]: upgrade.service: Forked /bin/upgrade as 1022
Dec 14 15:08:51 localhost systemd[1]: upgrade.service: Changed dead -> start
Dec 14 15:08:51 localhost systemd[1]: Starting System Upgrade...
Dec 14 15:08:51 localhost systemd[1022]: upgrade.service: Executing: /bin/upgrade
Dec 14 15:08:51 localhost upgrade[1022]: starting upgrade hook
Dec 14 15:08:51 localhost upgrade[1022]: /bin/upgrade: line 19: /sysroot/var/tmp/system-upgrade.state: No such file or directory
Dec 14 15:08:52 localhost kernel: EXT4-fs (sda5): mounted filesystem with ordered data mode. Opts: (null)
Dec 14 15:08:52 localhost kernel: EXT4-fs (sda5): re-mounted. Opts: (null)
Dec 14 15:08:52 localhost kernel: EXT4-fs (sda6): re-mounted. Opts: (null)
Dec 14 15:08:51 localhost systemd[1]: initrd-root-fs.target: ConditionPathExists=/etc/initrd-release succeeded.
Dec 14 15:08:52 localhost upgrade[1025]: WARNING: locking_type (4) is deprecated, using --sysinit --readonly.
Dec 14 15:08:51 localhost systemd[1]: initrd-root-fs.target changed dead -> active
Dec 14 15:08:52 localhost upgrade[1022]: Mounting /usr with -o defaults,ro
Dec 14 15:08:51 localhost systemd[1]: initrd-root-fs.target: Job initrd-root-fs.target/start finished, result=done
Dec 14 15:08:52 localhost upgrade[1042]: Found cgroup on /sys/fs/cgroup/systemd, legacy hierarchy
Dec 14 15:08:52 localhost upgrade[1042]: Setting RLIMIT_CPU to infinity.
Dec 14 15:08:52 localhost upgrade[1042]: Setting RLIMIT_FSIZE to infinity.
Dec 14 15:08:52 localhost upgrade[1042]: Setting RLIMIT_DATA to infinity.
Dec 14 15:08:52 localhost upgrade[1042]: Setting RLIMIT_STACK to 8388608:infinity.
Dec 14 15:08:52 localhost upgrade[1042]: Setting RLIMIT_CORE to 0:infinity.
Dec 14 15:08:52 localhost upgrade[1042]: Setting RLIMIT_RSS to infinity.
Dec 14 15:08:52 localhost upgrade[1042]: Setting RLIMIT_NPROC to 254679.
Dec 14 15:08:52 localhost upgrade[1042]: Setting RLIMIT_NOFILE to 1024:4096.
Dec 14 15:08:52 localhost upgrade[1042]: Setting RLIMIT_MEMLOCK to 65536.
Dec 14 15:08:52 localhost upgrade[1042]: Setting RLIMIT_AS to infinity.
Dec 14 15:08:52 localhost upgrade[1042]: Setting RLIMIT_LOCKS to infinity.
Dec 14 15:08:52 localhost upgrade[1042]: Setting RLIMIT_SIGPENDING to 254679.
Dec 14 15:08:52 localhost upgrade[1042]: Setting RLIMIT_MSGQUEUE to 819200.
Dec 14 15:08:52 localhost upgrade[1042]: Setting RLIMIT_NICE to 0.
Dec 14 15:08:52 localhost upgrade[1042]: Setting RLIMIT_RTPRIO to 0.
Dec 14 15:08:52 localhost upgrade[1042]: Setting RLIMIT_RTTIME to infinity.
Dec 14 15:08:52 localhost upgrade[1042]: Spawning container sysroot on /sysroot.
Dec 14 15:08:52 localhost upgrade[1042]: Press ^] three times within 1s to kill container.
Dec 14 15:08:54 localhost kernel: EXT4-fs (sda1): mounting ext3 file system using the ext4 subsystem
Dec 14 15:08:54 localhost kernel: EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
Dec 14 15:08:54 localhost kernel: FAT-fs (sda8): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
Dec 14 15:08:54 localhost kernel: EXT4-fs (sda2): mounted filesystem with ordered data mode. Opts: (null)
Dec 14 15:08:54 localhost kernel: EXT4-fs (sda3): mounted filesystem with ordered data mode. Opts: (null)
Dec 14 15:08:54 localhost kernel: EXT4-fs (sda9): mounted filesystem with ordered data mode. Opts: (null)
Dec 14 15:08:51 localhost systemd[1]: Reached target Initrd Root File System.
Dec 14 15:08:54 localhost upgrade[1043]: Mounting / (MS_REC|MS_SLAVE "")...
Dec 14 15:08:54 localhost upgrade[1043]: Using legacy hierarchy for container.
Dec 14 15:08:54 localhost upgrade[1043]: Bind-mounting /sysroot on /sysroot (MS_BIND|MS_REC "")...
Dec 14 15:08:54 localhost upgrade[1043]: Mounting /sysroot (MS_REC|MS_SHARED "")...
Dec 14 15:08:54 localhost upgrade[1043]: Mounting tmpfs on /sysroot/tmp (MS_NOSUID|MS_NODEV|MS_STRICTATIME "mode=1777")...
Dec 14 15:08:54 localhost upgrade[1043]: Mounting sysfs on /sysroot/sys (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC "")...
Dec 14 15:08:54 localhost upgrade[1043]: Mounting tmpfs on /sysroot/dev (MS_NOSUID|MS_STRICTATIME "mode=755")...
Dec 14 15:08:54 localhost upgrade[1043]: Mounting tmpfs on /sysroot/dev/shm (MS_NOSUID|MS_NODEV|MS_STRICTATIME "mode=1777")...
Dec 14 15:08:54 localhost upgrade[1043]: Mounting tmpfs on /sysroot/run (MS_NOSUID|MS_NODEV|MS_STRICTATIME "mode=755")...
Dec 14 15:08:54 localhost upgrade[1043]: Bind-mounting /sys/fs/selinux on /sysroot/sys/fs/selinux (MS_BIND "")...
Dec 14 15:08:54 localhost upgrade[1043]: Remounting /sysroot/sys/fs/selinux (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_REMOUNT|MS_BIND "")...
Dec 14 15:08:54 localhost upgrade[1043]: Mounting devpts on /sysroot/dev/pts (MS_NOSUID|MS_NOEXEC "newinstance,ptmxmode=0666,mode=620,gid=5")...
Dec 14 15:08:54 localhost upgrade[1043]: Bind-mounting /run/systemd/nspawn/propagate/sysroot on /sysroot/run/systemd/nspawn/incoming (MS_BIND "")...
Dec 14 15:08:54 localhost upgrade[1043]: Remounting /sysroot/run/systemd/nspawn/incoming (MS_RDONLY|MS_REMOUNT|MS_BIND "")...
Dec 14 15:08:54 localhost upgrade[1043]: Mounting /sysroot/run/systemd/nspawn/incoming (MS_SLAVE "")...
Dec 14 15:08:54 localhost upgrade[1043]: Bind-mounting /dev/pts/0 on /sysroot/dev/console (MS_BIND "")...
Dec 14 15:08:54 localhost upgrade[1043]: Applying whitelist on architecture: x86
Dec 14 15:08:54 localhost upgrade[1043]: Applying whitelist on architecture: x32
Dec 14 15:08:54 localhost upgrade[1043]: Applying whitelist on architecture: x86-64
Dec 14 15:08:54 localhost upgrade[1043]: Applying NETLINK_AUDIT mask on architecture: x86
Dec 14 15:08:54 localhost upgrade[1043]: Failed to add audit seccomp rule, ignoring: Invalid argument
Dec 14 15:08:54 localhost upgrade[1043]: Applying NETLINK_AUDIT mask on architecture: x32
Dec 14 15:08:54 localhost upgrade[1043]: Applying NETLINK_AUDIT mask on architecture: x86-64
Dec 14 15:08:54 localhost upgrade[1043]: Bind-mounting /dev on /sysroot/dev (MS_BIND|MS_REC "")...
Dec 14 15:08:54 localhost upgrade[1043]: Bind-mounting /dev/mapper on /sysroot/dev/mapper (MS_BIND|MS_REC "")...
Dec 14 15:08:54 localhost upgrade[1043]: Bind-mounting /dev/pts on /sysroot/dev/pts (MS_BIND|MS_REC "")...
Dec 14 15:08:54 localhost upgrade[1043]: Bind-mounting /proc on /sysroot/proc (MS_BIND|MS_REC "")...
Dec 14 15:08:54 localhost upgrade[1043]: Bind-mounting /run/lock on /sysroot/run/lock (MS_BIND|MS_REC "")...
Dec 14 15:08:54 localhost upgrade[1043]: Bind-mounting /run/systemd on /sysroot/run/systemd (MS_BIND|MS_REC "")...
Dec 14 15:08:54 localhost upgrade[1043]: Bind-mounting /run/udev on /sysroot/run/udev (MS_BIND|MS_REC "")...
Dec 14 15:08:54 localhost upgrade[1043]: Bind-mounting /sys on /sysroot/sys (MS_BIND|MS_REC "")...
Dec 14 15:08:52 localhost systemd[1]: sysroot-usr.mount: Changed dead -> mounted
Dec 14 15:08:57 localhost upgrade[1044]: Bind-mounting /proc/sys on /proc/sys (MS_BIND "")...
Dec 14 15:08:57 localhost upgrade[1044]: Remounting /proc/sys (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_REMOUNT|MS_BIND "")...
Dec 14 15:08:57 localhost upgrade[1044]: Bind-mounting /tmp/.#inaccessible892af3a0f1b08168 on /proc/kallsyms (MS_BIND "")...
Dec 14 15:08:57 localhost upgrade[1044]: Remounting /proc/kallsyms (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_REMOUNT|MS_BIND "")...
Dec 14 15:08:57 localhost upgrade[1044]: Bind-mounting /tmp/.#inaccessible892af3a0f1b08168 on /proc/kcore (MS_BIND "")...
Dec 14 15:08:57 localhost upgrade[1044]: Remounting /proc/kcore (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_REMOUNT|MS_BIND "")...
Dec 14 15:08:57 localhost upgrade[1044]: Bind-mounting /tmp/.#inaccessible892af3a0f1b08168 on /proc/keys (MS_BIND "")...
Dec 14 15:08:57 localhost upgrade[1044]: Remounting /proc/keys (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_REMOUNT|MS_BIND "")...
Dec 14 15:08:57 localhost upgrade[1044]: Bind-mounting /tmp/.#inaccessible892af3a0f1b08168 on /proc/sysrq-trigger (MS_BIND "")...
Dec 14 15:08:57 localhost upgrade[1044]: Remounting /proc/sysrq-trigger (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_REMOUNT|MS_BIND "")...
Dec 14 15:08:57 localhost upgrade[1044]: Bind-mounting /tmp/.#inaccessible892af3a0f1b08168 on /proc/timer_list (MS_BIND "")...
Dec 14 15:08:57 localhost upgrade[1044]: Remounting /proc/timer_list (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_REMOUNT|MS_BIND "")...
Dec 14 15:08:57 localhost upgrade[1044]: Bind-mounting /proc/acpi on /proc/acpi (MS_BIND "")...
Dec 14 15:08:57 localhost upgrade[1044]: Remounting /proc/acpi (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_REMOUNT|MS_BIND "")...
Dec 14 15:08:57 localhost upgrade[1044]: Failed to create directory /proc/apm: No such file or directory
Dec 14 15:08:57 localhost upgrade[1044]: Failed to create directory /proc/asound: No such file or directory
Dec 14 15:08:57 localhost upgrade[1044]: Bind-mounting /proc/bus on /proc/bus (MS_BIND "")...
Dec 14 15:08:57 localhost upgrade[1044]: Remounting /proc/bus (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_REMOUNT|MS_BIND "")...
Dec 14 15:08:57 localhost upgrade[1044]: Bind-mounting /proc/fs on /proc/fs (MS_BIND "")...
Dec 14 15:08:57 localhost upgrade[1044]: Remounting /proc/fs (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_REMOUNT|MS_BIND "")...
Dec 14 15:08:57 localhost upgrade[1044]: Bind-mounting /proc/irq on /proc/irq (MS_BIND "")...
Dec 14 15:08:57 localhost upgrade[1044]: Remounting /proc/irq (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_REMOUNT|MS_BIND "")...
Dec 14 15:08:57 localhost upgrade[1044]: Bind-mounting /proc/scsi on /proc/scsi (MS_BIND "")...
Dec 14 15:08:57 localhost upgrade[1044]: Remounting /proc/scsi (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_REMOUNT|MS_BIND "")...
Dec 14 15:08:52 localhost systemd[1]: systemd-journald.service: Got notification message from PID 714 (FDSTORE=1)
Dec 14 15:09:00 localhost upgrade[1042]: (sd-namespace) succeeded.
Dec 14 15:09:00 localhost upgrade[1042]: Init process invoked as PID 1044
Dec 14 15:09:00 localhost upgrade[1042]: Failed to chown "/sys/fs/cgroup/systemd/system.slice/upgrade.service/payload/cgroup.controllers", ignoring: No such file or directory
Dec 14 15:09:00 localhost upgrade[1042]: Failed to chown "/sys/fs/cgroup/systemd/system.slice/upgrade.service/payload/cgroup.events", ignoring: No such file or directory
Dec 14 15:09:00 localhost upgrade[1042]: Failed to chown "/sys/fs/cgroup/systemd/system.slice/upgrade.service/payload/cgroup.stat", ignoring: No such file or directory
Dec 14 15:09:00 localhost upgrade[1042]: Failed to chown "/sys/fs/cgroup/systemd/system.slice/upgrade.service/payload/cgroup.subtree_control", ignoring: No such file or directory
Dec 14 15:09:00 localhost upgrade[1042]: Failed to chown "/sys/fs/cgroup/systemd/system.slice/upgrade.service/payload/cgroup.threads", ignoring: No such file or directory
Dec 14 15:08:52 localhost systemd[1]: systemd-journald.service: Added fd 39 (n/a) to fd store.
Dec 14 15:09:01 localhost upgrade[1044]: Remounting /sys/fs/cgroup (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_REMOUNT|MS_STRICTATIME "mode=755")...
Dec 14 15:09:01 localhost upgrade[1044]: Bind-mounting /tmp/.#proc-sys-kernel-random-boot-id3dffa7153841ccda on /proc/sys/kernel/random/boot_id (MS_BIND "")...
Dec 14 15:09:01 localhost upgrade[1044]: Remounting /proc/sys/kernel/random/boot_id (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_REMOUNT|MS_BIND "")...
Dec 14 15:09:01 localhost upgrade[1044]: Bind-mounting /tmp/.#proc-kmsg31eea7d966bf2d6c on /proc/kmsg (MS_BIND "")...
Dec 14 15:08:52 localhost systemd[1]: inotify event for /etc/localtime
Dec 14 15:08:52 localhost systemd[1]: Failed to stat /etc/localtime, ignoring: No such file or directory
Dec 14 15:08:52 localhost systemd-udevd[1049]: passed 126 byte device to netlink monitor 0x55b94c8fe0c0
Dec 14 15:08:52 localhost systemd-udevd[1050]: passed 127 byte device to netlink monitor 0x55b94c876240
我猜问题是这样的：
Dec 14 15:08:51 localhost systemd[1022]: upgrade.service: Executing: /bin/upgrade
Dec 14 15:08:51 localhost upgrade[1022]: starting upgrade hook
Dec 14 15:08:51 localhost upgrade[1022]: /bin/upgrade: line 19: /sysroot/var/tmp/system-upgrade.state: No such file or directory
我怎样才能进一步调试？有没有办法在启动时打开外壳？ init=/bin/bash & systemd.unit=emergency.target 不起作用