.. _Configuring Running Containers:

Configuring Running Containers
==============================

Change memory available to a running container:

::

   $ virsh --connect docker://node3.winctpreview.com setmem vpnclient<N>_winct03nano 768M
   $ virsh --connect docker://node3.winctpreview.com dumpxml vpnclient<N>_winct03nano | grep -i memory
   <memory unit='KiB'>786432</memory>
   <currentMemory unit='KiB'>786432</currentMemory>

Edit the CPU shares of a running container (only if a CPU quota is not set):

::

   $ virsh --connect docker://node3.winctpreview.com schedinfo vpnclient<N>_winct03nano cpu_shares=1000
   Scheduler : posix
   cpu_shares : 1000
   vcpu_period : 0
   vcpu_quota : 0

Edit the CPU quota of a running container (only if CPU shares are not set):

::

   $ virsh --connect docker://node3.winctpreview.com schedinfo vpnclient<N>_winct03nano vcpu_period=4000 vcpu_quota=2000
   Scheduler : posix
   cpu_shares : 0
   vcpu_period : 4000
   vcpu_quota : 2000

Reset the CPU shares and quota of a running container:

::

   $ virsh --connect docker://node3.winctpreview.com schedinfo vpnclient<N>_winct03nano cpu_shares=-1
   $ virsh --connect docker://node3.winctpreview.com schedinfo vpnclient<N>_winct03nano vcpu_quota=-1
   Scheduler : posix
   cpu_shares : 0
   vcpu_period : 0
   vcpu_quota : 0

Change the total throughput limit of a running container's device:

::

   $ virsh --connect docker://node3.winctpreview.com domblklist vpnclient<N>_winct03nano
    Target   Source
   ------------------
    vda      -
   $ virsh --connect docker://node3.winctpreview.com blkdeviotune vpnclient<N>_winct03nano vda --total-bytes-sec=104857600 --total-iops-sec=1000