[libvirt-users] Failed to access the console after starting the lxc container

[Aarti Sawant]

Hello,

I am starting the system container without "/"  directory So that it can
share the host /bin /sbin /lib and /lib64 and i have sepeartely mounted
/var, /etc and /usr directory for the container
Below is xml file
 <domain type='lxc'>
<name>test6</name>
<memory>102400</memory>
<os>
  <type>exe</type>
  <init>/sbin/init</init>
</os>
<vcpu>1</vcpu>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>

<devices>
  <console type='pty'/>
  <emulator>/usr/libexec/libvirt_lxc</emulator>
  <filesystem type='mount' accessmode='passthrough'>
    <source dir='/lxc/test6/etc'/>
    <target dir='/etc'/>
  </filesystem>

  <filesystem type='mount' accessmode='passthrough'>
    <source dir='/lxc/test6/var'/>
    <target dir='/var'/>
  </filesystem>
  <filesystem type='mount' accessmode='passthrough'>
    <source dir='/lxc/test6/usr'/>
     <target dir='/usr'/>
  </filesystem>

  <filesystem type='mount' accessmode='passthrough'>
    <source dir='/pg_data/'/>
    <target dir='/pg_data'/>
  </filesystem>

  <filesystem type='ram' accessmode='passthrough'>
    <source usage='0' units='KiB'/>
    <target dir='/dev/shm'/>
   </filesystem>
   <interface type='bridge'>
     <source bridge='br0' />
   </interface>
</devices>
</domain>


when i start the container it get start , but when i try to access console
it get stuck

virsh # list
 Id    Name                           State
----------------------------------------------------
 18238 test4                          running
 20435 test6                          running


virsh #

virsh # start test6
Domain test6 started

virsh # console test6
Connected to domain test6
Escape character is ^]


But when i mount the "/" in xml it works, i have also share host
/bin,/sbin, /lib and /lib64.

<domain type='lxc'>
<name>test4</name>
<memory>102400</memory>
<os>
  <type>exe</type>
  <init>/sbin/init</init>
</os>
<vcpu>1</vcpu>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>

<devices>
  <console type='pty'/>
  <emulator>/usr/libexec/libvirt_lxc</emulator>
<filesystem type='mount' accessmode='passthrough'>
    <source dir='/lxc/test4/'/>
    <target dir='/'/>
  </filesystem>
  <filesystem type='mount' accessmode='passthrough'>
    <source dir='/bin'/>
    <target dir='/bin'/>
  </filesystem>

  <filesystem type='mount' accessmode='passthrough'>
    <source dir='/sbin'/>
    <target dir='/sbin'/>
  </filesystem>
  <filesystem type='mount' accessmode='passthrough'>
    <source dir='/lib'/>
     <target dir='/lib'/>
  </filesystem>
  </filesystem>
  <filesystem type='mount' accessmode='passthrough'>
    <source dir='/lib64'/>
     <target dir='/lib64'/>
  </filesystem>
  <filesystem type='mount' accessmode='passthrough'>
    <source dir='/pg_data/'/>
    <target dir='/pg_data'/>
  </filesystem>

  <filesystem type='ram' accessmode='passthrough'>
    <source usage='0' units='KiB'/>
    <target dir='/dev/shm'/>
   </filesystem>
   <interface type='bridge'>
     <source bridge='br0' />
   </interface>
</devices>
</domain>

as i am new , can anyone explain me why my test6 container get stuck?
And in system container if we need to share host filesystem y we need to
mount them explicitly?

Thanks,
Aarti Sawant
NTTDATA OSS Center Pune
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