问题描述
我在 Windows10 Professional 上运行 Debian10.06 VirtualBox。 在 Debian10.06 中，我安装了 Docker，我正在“从 Centos8”构建映像
运行容器并在其终端中执行以下操作时；
cd /tmp
mkdir lower upper workdir overlay
mount -t overlay -o \
> lowerdir=/tmp/lower,\
> upperdir=/tmp/upper,\
> workdir=/tmp/workdir \
> none /tmp/overlay
我明白
mount: /tmp/overlay: wrong fs type,bad option,bad superblock on none,missing codepage or helper program,or other error.
（我还指定了 'overlay' 而不是 'none'，正如一些文件所建议的那样，但我得到了相同的结果）
我错过了什么？
我按如下方式构建并运行容器；
docker build --rm -t core .
docker run --name core-1 --privileged=true -ti -v /sys/fs/cgroup:/sys/fs/cgroup:ro -v /tempdocker/run:/run -v /tempdocker/out:/setup/out -p 8080:8080 -p 8081:8081 core
也许下一个信息有帮助；
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 499711 497664 243M 83 Linux
/dev/sda2 501758 209713151 209211394 99.8G 5 Extended
/dev/sda5 501760 209713151 209211392 99.8G 8e Linux LVM
和
[root@17c80b9eeac7 tmp]# mount
overlay on / type overlay (rw,relatime,lowerdir=/var/lib/docker/overlay2/l/YUN7QB7JCVVRH5ZS4XA63HITO4:/var/lib/docker/overlay2/l/STJSTW7XY6656R6MK4HI63MGYZ:/var/lib/docker/overlay2/l/BWQTYCEG6X3ZTCXCU4PZKUIJID:/var/lib/docker/overlay2/l/4XJS5A4F33BJJZGZIKH7UM2TQ5:/var/lib/docker/overlay2/l/MMSEXD7BETBLVKHM5GTOCSPDNY:/var/lib/docker/overlay2/l/DRYVSQXANFMFtixI5PRAOCNZJH:/var/lib/docker/overlay2/l/U7236TVVLEMZCHO5WRBINRNRLZ:/var/lib/docker/overlay2/l/R4CYY53TWBS3DEDH6ZBD7I3BCK:/var/lib/docker/overlay2/l/2T4H7URM6UDQMGZKJUVCHKXBU5:/var/lib/docker/overlay2/l/ZRYOfdrPJNOOZKJWLOH6K5NRC4:/var/lib/docker/overlay2/l/47TVKIYYQ2PTWWnopBRYW7XCCC:/var/lib/docker/overlay2/l/FZZGKL6CKKYGKL42YVI4FKCGZA:/var/lib/docker/overlay2/l/4LEF3XUHSEIFJLWEVSYELSOOKY:/var/lib/docker/overlay2/l/3KFWFB3YGHXQNNOIOKQGTJZHTO:/var/lib/docker/overlay2/l/5AV2OKXJB4BW5G636VG6ZQM2JK:/var/lib/docker/overlay2/l/TLTL4DOVW6VHZKRV53K2SWVADC:/var/lib/docker/overlay2/l/7B3AVP2T3DYTTXBL7pltKLSWTR:/var/lib/docker/overlay2/l/HQDFKLGPYSIOQ7HSLDKTSTHQ6K:/var/lib/docker/overlay2/l/4HMAAUJXH5XEW4F2ZGRITGEIHY:/var/lib/docker/overlay2/l/NX7URCVKWMFCXKR2LSFL5ANM3Z:/var/lib/docker/overlay2/l/QZPOVLPA3R3VONBEWVWW3XXHBB:/var/lib/docker/overlay2/l/2QLFM7X3CROHKO4NSOPYSNFUVH,upperdir=/var/lib/docker/overlay2/ed89d234552d386496fd2f60f597c276c613796a1e1a0bada8853f5d3dd93cf7/diff,workdir=/var/lib/docker/overlay2/ed89d234552d386496fd2f60f597c276c613796a1e1a0bada8853f5d3dd93cf7/work)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev type tmpfs (rw,size=65536k,mode=755)
devpts on /dev/pts type devpts (rw,gid=5,mode=620,ptmxmode=666)
sysfs on /sys type sysfs (rw,relatime)
mqueue on /dev/mqueue type mqueue (rw,relatime)
/dev/mapper/debian10--vg-root on /run type ext4 (rw,errors=remount-ro)
/dev/mapper/debian10--vg-root on /setup/out type ext4 (rw,errors=remount-ro)
/dev/mapper/debian10--vg-var on /etc/resolv.conf type ext4 (rw,relatime)
/dev/mapper/debian10--vg-var on /etc/hostname type ext4 (rw,relatime)
/dev/mapper/debian10--vg-var on /etc/hosts type ext4 (rw,relatime)
shm on /dev/shm type tmpfs (rw,size=65536k)
tmpfs on /sys/fs/cgroup type tmpfs (ro,mode=755)
cgroup2 on /sys/fs/cgroup/unified type cgroup2 (rw,nsdelegate)
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,xattr,name=systemd)
cgroup on /sys/fs/cgroup/pids type cgroup (rw,pids)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,cpu,cpuacct)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,memory)
cgroup on /sys/fs/cgroup/rdma type cgroup (rw,rdma)
cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (rw,net_cls,net_prio)
cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,perf_event)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,devices)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,cpuset)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,freezer)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,blkio)
devpts on /dev/console type devpts (rw,ptmxmode=666)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,fd=26,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=106699)
debugfs on /sys/kernel/debug type debugfs (rw,relatime)
嗯.. 下一个命令给出了我没想到的结果，因为我确定它应该是 Centos8
[root@17c80b9eeac7 tmp]# uname -a
Linux 17c80b9eeac7 4.19.0-13-amd64 #1 SMP Debian 4.19.160-2 (2020-11-28) x86_64 x86_64 x86_64 GNU/Linux
我的 Debian VM（docker 主机）中的相同命令给出
debian@debian10:~/Documents/in-git/dockerfiles/test$ uname -a
Linux debian10 4.19.0-13-amd64 #1 SMP Debian 4.19.160-2 (2020-11-28) x86_64 GNU/Linux
解决方法
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