[OpenWrt-Devel] running docker on openwrt?

[Daniel Golle]

On Sun, Sep 30, 2018 at 02:18:54PM +0200, Torbjorn Jansson wrote:
> On 2018-09-30 13:59, Daniel Golle wrote:
> > On Sun, Sep 30, 2018 at 12:21:12PM +0200, Torbjorn Jansson wrote:
> > > Hello.
> > > 
> > > a question, is it possible to run docker on openwrt?
> > > reason for asking is that i got a raspberrypi running openwrt and it got
> > > plenty of storage space and is mostly sitting idle so if i can run docker on
> > > it i might be able to consolidate some of the other pis i have for various
> > > purposes.
> > > 
> > > i know you can do it the other way around, running openwrt in a docker
> > > instance on a regular computer but can you get docker itself to run under
> > > openwrt?
> > > 
> > > ideas, suggestions?
> > 
> > Just use LXC, that works well on OpenWrt, I'm using that to run various
> > containers running Debian and OpenWrt on top of OpenWrt.
> > (but you need to compile it yourself because many of the kernel options
> > needed for containers aren't enabled by default)
> > 
> > Docker didn't attract a lot of interest because it is x86_64 and
> > ARM-only, so 80% of OpenWrt-supported devices aren't supported by
> > Docker which doesn't provide images for MIPS-like CPUs.
> > 
> > However, now that Golang has been added to the packages feed we could
> > package Docker at least for the platforms supported by it...
> > 
> 
> ok, i see.
> i've never tried lxc and i think docker also needs some extra kernel config
> options for it to work.
> 
> i ran the script from:
> https://raw.githubusercontent.com/docker/docker/master/contrib/check-config.sh
> on one of my boxes and it complained about:
> - CONFIG_NAMESPACES: missing
> - CONFIG_NET_NS: missing
> - CONFIG_PID_NS: missing
> - CONFIG_IPC_NS: missing
> - CONFIG_UTS_NS: missing
> - CONFIG_CGROUPS: missing
> - CONFIG_CGROUP_CPUACCT: missing
> - CONFIG_CGROUP_DEVICE: missing
> - CONFIG_CGROUP_FREEZER: missing
> - CONFIG_CGROUP_SCHED: missing
> - CONFIG_CPUSETS: missing
> - CONFIG_MEMCG: missing
> - CONFIG_NETFILTER_XT_MATCH_IPVS: missing
> - CONFIG_POSIX_MQUEUE: missing
> 
> and then there were a bunch of optional features also missing.

For now the binary distribution doesn't have all those kernel features
enabled. You need to compile from source and make sure that
CONFIG_LXC_KERNEL_OPTIONS is set, this selects all the kernel options
needed to run containers.


> 
> i'm for any way of running containers on a openwrt image, like my pis
> 
> then i should be able to run some of my stuff as a container and i don't
> have to worry too much about various packages and so on since i can run for
> example a debian container plus i could likely consolidated my stuff to just
> one box instead of 3 separate.
> plus one of the programs i need is very picky about having exactly the right
> libraries and versions of them.
> 
> _______________________________________________
> openwrt-devel mailing list
> openwrt-devel at lists.openwrt.org
> https://lists.openwrt.org/mailman/listinfo/openwrt-devel

_______________________________________________
openwrt-devel mailing list
openwrt-devel at lists.openwrt.org
https://lists.openwrt.org/mailman/listinfo/openwrt-devel