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How does LXC setup its root mount point?



Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)
2019 Community Moderator Election Results
Why I closed the “Why is Kali so hard” questionLXC: How can I mount a drive/directory without restarting the container?Mounting an MTP enabled device on Ubuntu 12.04.3 LTS 32-bitLXC mount CIFS => permision deniedIs it possible to mount a device in a process' namespace after unshare()How to bind-mount a directory into running LXC container on the fly?lxc+btrfs - Create and then remove a dir w/ circular symbolic link causes stale file handleHow to boot a virtual machine from a regular folder?Could not find writable mount point for cgroup hierarchy 13 while trying to create cgroupNFS mount on LXC containerExpose mount from LXC to host



.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;








0















I am trying to experiment with mount namespace in Ubuntu. So far I can create an empty mount namespace using the following:



# mkdir test
# unshare --mount
# mount none test -t tmpfs
# cd test
# pivot_root . .
# cd / <--- test becomes /


When I check a LXC Ubuntu container, the mount command displays the following:



enter image description here



Since the mount namespace initially gets a copy of the mount points, I presume the /dev/sda1 inside the container is the global /dev/sda1 (because there is no /dev/sda1 inside the container once it is started), and yet the contents of the / inside the container correspond to its rootfs. Can someone familiar with LXC please explain what mount operations does LXC do before it does its pivot_root inside the container ?










share|improve this question






























    0















    I am trying to experiment with mount namespace in Ubuntu. So far I can create an empty mount namespace using the following:



    # mkdir test
    # unshare --mount
    # mount none test -t tmpfs
    # cd test
    # pivot_root . .
    # cd / <--- test becomes /


    When I check a LXC Ubuntu container, the mount command displays the following:



    enter image description here



    Since the mount namespace initially gets a copy of the mount points, I presume the /dev/sda1 inside the container is the global /dev/sda1 (because there is no /dev/sda1 inside the container once it is started), and yet the contents of the / inside the container correspond to its rootfs. Can someone familiar with LXC please explain what mount operations does LXC do before it does its pivot_root inside the container ?










    share|improve this question


























      0












      0








      0








      I am trying to experiment with mount namespace in Ubuntu. So far I can create an empty mount namespace using the following:



      # mkdir test
      # unshare --mount
      # mount none test -t tmpfs
      # cd test
      # pivot_root . .
      # cd / <--- test becomes /


      When I check a LXC Ubuntu container, the mount command displays the following:



      enter image description here



      Since the mount namespace initially gets a copy of the mount points, I presume the /dev/sda1 inside the container is the global /dev/sda1 (because there is no /dev/sda1 inside the container once it is started), and yet the contents of the / inside the container correspond to its rootfs. Can someone familiar with LXC please explain what mount operations does LXC do before it does its pivot_root inside the container ?










      share|improve this question
















      I am trying to experiment with mount namespace in Ubuntu. So far I can create an empty mount namespace using the following:



      # mkdir test
      # unshare --mount
      # mount none test -t tmpfs
      # cd test
      # pivot_root . .
      # cd / <--- test becomes /


      When I check a LXC Ubuntu container, the mount command displays the following:



      enter image description here



      Since the mount namespace initially gets a copy of the mount points, I presume the /dev/sda1 inside the container is the global /dev/sda1 (because there is no /dev/sda1 inside the container once it is started), and yet the contents of the / inside the container correspond to its rootfs. Can someone familiar with LXC please explain what mount operations does LXC do before it does its pivot_root inside the container ?







      mount lxc namespace






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited 8 hours ago







      Jake

















      asked 10 hours ago









      JakeJake

      538822




      538822




















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