Does REAL-TIME-EDGE v2.2 support DOCKER?

[xinliwang]

Hi @yipingwang 

I wonder if NXP REAL-TIME-EDGE  support DOCKER or not?

My board is ls1028ardb which use REAL-TIME-EDGE v2.2 and I tried to install docker onto the board but it seems doesn't support rt version. So, I want to double check from you guys if RT support docker or not.

Thanks

[kenli · Accepted solution]

hi xinliwang,

The docker level is not feature of real time edge bsp. You can still ask for help in the yocto community though.
The following are some modifications I made to compile in the 2.5 environment. You can refer which may helps.
I'm not a yocto expert, and I don't have a layerscape board handy, anyway, you can give it a try.
add the follow lines in your conf/local.conf file. and bitbake you prj again.then deploy and test again.

LICENSE_FLAGS_ACCEPTED += "commercial"
DISTRO_FEATURES:append = "virtualization"
IMAGE_INSTALL:append += "docker connman connman-client"
CORE_IMAGE_EXTRA_INSTALL += "openssh"

[xinliwang]

Thank man, I will give a try.

[kenli]

What application model needs to run docker on 2 core a72?

Docker does not depend on the hardware platform.

If you are based on the ubuntu file system, you can refer to the official docker guide and try： https://www.docker.com/blog/getting-started-with-docker-for-arm-on-linux/

[xinliwang]

Hi @kenli 

Thank you for reply.

Docker depends on what kind of rootfs platform we use, since real-time-edge is not ubuntu which I could not find appropriate platform version to install.

I tried to install docker engine from binaries. After successfully installed, it pops out an error after run docker run hello-world:

Since real time edge use cgroup v1 as default. I wonder maybe this is the point. I check the rt version that it does support cgroup v2.

So I find out a way to execute cgroup v2 by adding systemd.unified_cgroup_hierarchy=1 to /etc/default/grub

 But for nxp-real-time-edge is different from ubuntu, It doesn't have systemd comman and do not have grub file either.

So, how could I start cgroup v2 instead of cgroup v1? or how do I solve the docker problem?