Difference between revisions of "LXD/FAQ"

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     lxc.mount.entry = none dev/shm tmpfs rw,nosuid,nodev,create=dir
 
     lxc.mount.entry = none dev/shm tmpfs rw,nosuid,nodev,create=dir
 
     lxc.mount.entry = none tmp tmpfs rw,nosuid,nodev,create=dir
 
     lxc.mount.entry = none tmp tmpfs rw,nosuid,nodev,create=dir
 +
# How to make mounted directories writeable inside the container?
 +
#* Change of user and group is needed to match the uid/gid of the container.
 +
# How can I connect to screen inside container?
 +
#* This can be done for example:
 +
  lxc exec fun -- sh -c "exec >/dev/tty 2>/dev/tty </dev/tty && /usr/bin/screen -s /bin/bash"
 +
or
 +
  lxc exec fun -- sh -c "exec >/dev/tty 2>/dev/tty </dev/tty && /usr/bin/screen -x"

Revision as of 19:50, March 8, 2018

These are some questions that are frequently asked about LXD and related technologies.

  1. Can I use storage backend other then directory, that doesn't support some features?
    • This could be circumvented by using a image file and formatting it with btrfs and using that as storage pool.
  2. I can see all 80 cores with lscpu, are they all available?
    • No, unfortunately you can use only the number of cores that you have paid with your subscription.
  3. Is my container directly bound to specific CPU cores?
    • No, we limit only the number of cores for the container, but don't specify which cores are bound to your container.
  4. Are the settings made through "lxc config edit" - boot persistent?
    • Yes, they are.
  5. Is it possible to put multiple lines for example for lxc.raw config?
    • Yes, it is possible:
 raw.lxc: |-
   lxc.mount.entry = none dev/shm tmpfs rw,nosuid,nodev,create=dir
   lxc.mount.entry = none tmp tmpfs rw,nosuid,nodev,create=dir
  1. How to make mounted directories writeable inside the container?
    • Change of user and group is needed to match the uid/gid of the container.
  2. How can I connect to screen inside container?
    • This can be done for example:
 lxc exec fun -- sh -c "exec >/dev/tty 2>/dev/tty </dev/tty && /usr/bin/screen -s /bin/bash"

or

 lxc exec fun -- sh -c "exec >/dev/tty 2>/dev/tty </dev/tty && /usr/bin/screen -x"