On Sun, Sep 30, 2018 at 04:52:04PM +0200, Torbjorn Jansson wrote: > On 2018-09-30 16:21, Daniel Golle wrote: > > 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 see, so a package can modify the kernel options and enable needed features. > that's quite handy, i didn't know that. > > what i tried to do was to run: > make kernel_menuconfig CONFIG_TARGET=subtarget > and then pick the right options myself and then check it with: > git diff target/linux/ > > the diff looked good but the resulting image did not include my extra kernel > config options for some reason and in don't understand why.
This is not the intended ue of make kernel_menuconfig, that's why... > i assumed the stuff in target/linux/brcm2708/bcm2710/config-4.9 was going to > be used as a default template or something but maybe other config options is > overriding it. Exactly. The kernel options which are also listed in OpenWrt's .config always override the target-specific selection made by kernel_menuconfig. > > i'm no expert on the build system (yet?) so any pointers for manually adding > a few extra config options for testing purposes would be nice. > Just use the regular menuconfig's options mentioned above, all the cgroups and namespace stuff is listed there as well. Luka Perkov (@lperkov )and Marko Ratkaj (@ratkaj) can supposedly tell you more about the LXC integration in OpenWrt. Cheers Daniel _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
