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Created page with "Since Virtuozzo 7 kernel vzkernel-3.10.0-327.18.2.vz7.14.7 it is possible to run Docker inside containers. This article describes how. (This page is applicable for Virtuozzo 7..."
Since Virtuozzo 7 kernel vzkernel-3.10.0-327.18.2.vz7.14.7 it is possible to run Docker inside containers. This article describes how.
(This page is applicable for Virtuozzo 7.)
== Prerequisites ==
* Kernel 3.10.0-327.18.2.vz7.14.7 or later version
* Kernel modules '''veth''' and '''overlay''' loaded on host
Note: if you use kernel >= 3.10.0-327.18.2.vz7.14.25, you need to allow using "overlayfs" inside a Virtuozzo Container:
echo 1 > /proc/sys/fs/experimental_fs_enable
== Container tuning ==
* Turn on bridge feature to allow docker creating bridged network:
vzctl set $veid --features bridge:on --save
* Setup Container veth-based network (Container must be '''veth'''-based, not '''venet'''-based):
vzctl set $veid --netif_add eth0 --save
* Allow all iptables modules to be used in containers:
vzctl set $veid --netfilter full --save
== Limitations ==
* Only '''overlay''' and '''vfs''' Docker graph drivers are currently supported
* [[Checkpointing and live migration]] of a container with Docker containers inside is not supported yet (to be done)
== See also ==
* [[Docker inside CT]] page for running Docker Containers inside OpenVZ 6 Containers
[[Category:HOWTO]]
[[Category: TRD]]
(This page is applicable for Virtuozzo 7.)
== Prerequisites ==
* Kernel 3.10.0-327.18.2.vz7.14.7 or later version
* Kernel modules '''veth''' and '''overlay''' loaded on host
Note: if you use kernel >= 3.10.0-327.18.2.vz7.14.25, you need to allow using "overlayfs" inside a Virtuozzo Container:
echo 1 > /proc/sys/fs/experimental_fs_enable
== Container tuning ==
* Turn on bridge feature to allow docker creating bridged network:
vzctl set $veid --features bridge:on --save
* Setup Container veth-based network (Container must be '''veth'''-based, not '''venet'''-based):
vzctl set $veid --netif_add eth0 --save
* Allow all iptables modules to be used in containers:
vzctl set $veid --netfilter full --save
== Limitations ==
* Only '''overlay''' and '''vfs''' Docker graph drivers are currently supported
* [[Checkpointing and live migration]] of a container with Docker containers inside is not supported yet (to be done)
== See also ==
* [[Docker inside CT]] page for running Docker Containers inside OpenVZ 6 Containers
[[Category:HOWTO]]
[[Category: TRD]]
