Docker and GPLv3

Docker and GPLv3

[Måns]

Hi,

A client of mine wants to have docker on it's product and they are
having secure boot enabled which prevents us from having any GPLv3
licensed code on the target. We have successfully managed to add
docker to the target but we noticed that several packages have also
been added that is GPLv3

bash, gmp, gzip, libidn, libunistring, nettle, rsync, tar, wget

1. Does docker have a strict dependency to GPLv3 code?
2. For some reason that I don't understand, docker seems to pull in
LXC which in turn will pull in many of the packages. Is Docker using
LXC? I thought docker was replacing LXC doing the same thing as LXC.
3. Do you have any suggestions on how to have container support and
not pull in GPLv3 code? Is Docker moby an alternative?

BR
Måns Zigher

Re: [meta-virtualization] Docker and GPLv3

[Bruce Ashfield]

On Fri, Feb 4, 2022 at 3:53 AM Mans Zigher <mans.zigher@gmail.com> wrote:
>
> Hi,
>
> A client of mine wants to have docker on it's product and they are
> having secure boot enabled which prevents us from having any GPLv3
> licensed code on the target. We have successfully managed to add
> docker to the target but we noticed that several packages have also
> been added that is GPLv3
>
> bash, gmp, gzip, libidn, libunistring, nettle, rsync, tar, wget

Those shouldn't be coming directly from the docker dependencies, but of
course packages that it depends on, may pull other dependencies, etc.

What branch are you using ?

If you look at docker.inc in the layer, it has our known dependencies:

DEPENDS = " \
    go-cli \
    go-pty \
    go-context \
    go-mux \
    go-patricia \
    go-logrus \
    go-fsnotify \
    go-dbus \
    go-capability \
    go-systemd \
    btrfs-tools \
    sqlite3 \
    go-distribution \
    compose-file \
    go-connections \
    notary \
    grpc-go \
    libtool-native \
    libtool \
    "

DEPENDS:append:class-target = " lvm2"
RDEPENDS:${PN} = "util-linux util-linux-unshare iptables \
                  ${@bb.utils.contains('DISTRO_FEATURES', 'aufs',
'aufs-util', '', d)} \
                  ${@bb.utils.contains('DISTRO_FEATURES', 'systemd',
'', 'cgroup-lite', d)} \
                  bridge-utils \
                  ca-certificates \
                 "
RDEPENDS:${PN} += "virtual-containerd virtual-runc"


>
> 1. Does docker have a strict dependency to GPLv3 code?

There may be ways to avoid some GPLv3 dependencies, but it isn't
something that we've actively explored or tested. So it would be
an effort that needs experimentation.

> 2. For some reason that I don't understand, docker seems to pull in
> LXC which in turn will pull in many of the packages. Is Docker using
> LXC? I thought docker was replacing LXC doing the same thing as LXC.
> 3. Do you have any suggestions on how to have container support and
> not pull in GPLv3 code? Is Docker moby an alternative?

It depends on how you are installing docker to your image. In the latest
branches, it doesn't have a dependency on lxc. There are some package
groups and kernel configurations that are shared, but you don't have to
install using those packagegroups if they are pulling in elements that
you don't want or need.

Bruce

>
> BR
> Måns Zigher
>
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-- 
- Thou shalt not follow the NULL pointer, for chaos and madness await
thee at its end
- "Use the force Harry" - Gandalf, Star Trek II

Re: [meta-virtualization] Docker and GPLv3

[Måns]

Hi,

Thanks for your reply. The customer is currently using Thud. You
confirm our current findings so thanks. We are looking into removing
lxc and will then see what else is needed to see if we can skip the
GPLv3 packages. We will look into the GPLv3 license again but with our
current understanding our customer cannot comply with GPLv3 so we have
to avoid it at all cost.

BR
Måns Zigher

Den fre 4 feb. 2022 kl 15:15 skrev Bruce Ashfield <bruce.ashfield@gmail.com>:
>
> On Fri, Feb 4, 2022 at 3:53 AM Mans Zigher <mans.zigher@gmail.com> wrote:
> >
> > Hi,
> >
> > A client of mine wants to have docker on it's product and they are
> > having secure boot enabled which prevents us from having any GPLv3
> > licensed code on the target. We have successfully managed to add
> > docker to the target but we noticed that several packages have also
> > been added that is GPLv3
> >
> > bash, gmp, gzip, libidn, libunistring, nettle, rsync, tar, wget
>
> Those shouldn't be coming directly from the docker dependencies, but of
> course packages that it depends on, may pull other dependencies, etc.
>
> What branch are you using ?
>
> If you look at docker.inc in the layer, it has our known dependencies:
>
> DEPENDS = " \
>     go-cli \
>     go-pty \
>     go-context \
>     go-mux \
>     go-patricia \
>     go-logrus \
>     go-fsnotify \
>     go-dbus \
>     go-capability \
>     go-systemd \
>     btrfs-tools \
>     sqlite3 \
>     go-distribution \
>     compose-file \
>     go-connections \
>     notary \
>     grpc-go \
>     libtool-native \
>     libtool \
>     "
>
> DEPENDS:append:class-target = " lvm2"
> RDEPENDS:${PN} = "util-linux util-linux-unshare iptables \
>                   ${@bb.utils.contains('DISTRO_FEATURES', 'aufs',
> 'aufs-util', '', d)} \
>                   ${@bb.utils.contains('DISTRO_FEATURES', 'systemd',
> '', 'cgroup-lite', d)} \
>                   bridge-utils \
>                   ca-certificates \
>                  "
> RDEPENDS:${PN} += "virtual-containerd virtual-runc"
>
>
> >
> > 1. Does docker have a strict dependency to GPLv3 code?
>
> There may be ways to avoid some GPLv3 dependencies, but it isn't
> something that we've actively explored or tested. So it would be
> an effort that needs experimentation.
>
> > 2. For some reason that I don't understand, docker seems to pull in
> > LXC which in turn will pull in many of the packages. Is Docker using
> > LXC? I thought docker was replacing LXC doing the same thing as LXC.
> > 3. Do you have any suggestions on how to have container support and
> > not pull in GPLv3 code? Is Docker moby an alternative?
>
> It depends on how you are installing docker to your image. In the latest
> branches, it doesn't have a dependency on lxc. There are some package
> groups and kernel configurations that are shared, but you don't have to
> install using those packagegroups if they are pulling in elements that
> you don't want or need.
>
> Bruce
>
> >
> > BR
> > Måns Zigher
> >
> > -=-=-=-=-=-=-=-=-=-=-=-
> > Links: You receive all messages sent to this group.
> > View/Reply Online (#7040): https://lists.yoctoproject.org/g/meta-virtualization/message/7040
> > Mute This Topic: https://lists.yoctoproject.org/mt/88903092/1050810
> > Group Owner: meta-virtualization+owner@lists.yoctoproject.org
> > Unsubscribe: https://lists.yoctoproject.org/g/meta-virtualization/unsub [bruce.ashfield@gmail.com]
> > -=-=-=-=-=-=-=-=-=-=-=-
> >
>
>
> --
> - Thou shalt not follow the NULL pointer, for chaos and madness await
> thee at its end
> - "Use the force Harry" - Gandalf, Star Trek II

Re: [meta-virtualization] Docker and GPLv3

[Joakim Roubert]

On 2022-02-04 15:30, Mans Zigher wrote:
 >
> with our current understanding our customer cannot comply with GPLv3
> so we have to avoid it at all cost.

I think this is a situation where

https://layers.openembedded.org/layerindex/branch/master/layer/meta-gplv2/

might come in handy, together with something like

PREFERRED_VERSION_bash ?= "3.2.%"

in the local.conf (or similar suitable configuration place).

BR,

/Joakim

Re: [meta-virtualization] Docker and GPLv3

[Mikko.Rapeli]

Hi,

On Fri, Feb 04, 2022 at 04:03:52PM +0100, Joakim Roubert wrote:
> On 2022-02-04 15:30, Mans Zigher wrote:
> >
> > with our current understanding our customer cannot comply with GPLv3
> > so we have to avoid it at all cost.
> 
> I think this is a situation where
> 
> https://layers.openembedded.org/layerindex/branch/master/layer/meta-gplv2/
> 
> might come in handy, together with something like
> 
> PREFERRED_VERSION_bash ?= "3.2.%"
> 
> in the local.conf (or similar suitable configuration place).

While this would work, I can't recommend using meta-gplv2 as it contains unmaintained
SW versions.

Just configure the build to avoid GPLv3 via distro config, e.g.

INCOMPATIBLE_LICENSE_append += " GPLv3 GPLv3+ LGPLv3 LGPLv3+"

and configure SW components to build without GPLv3 dependencies.
lxc for examples compiles just fine without rsync and bash.

Additionally a lot of GPLv3 recipes can be enabled to build but be forbidden
images images, e.g. in distro config:

WHITELIST_GPL-3.0 += "bash"
PACKAGE_EXCLUDE += "bash-ptest bash-dbg bash-staticdev bash-dev bash-doc bash-locale bashbug bash"

Some refactoring of SW architecture may be needed to remove any dependencies to GPLv3
licensed SW. For development and testing GPLv3 components can often be used.

Cheers,

-Mikko

Re: [meta-virtualization] Docker and GPLv3

[Måns]

Thank you all for your answers

BR

Den fre 4 feb. 2022 kl 16:29 skrev Mikko Rapeli <mikko.rapeli@bmw.de>:
>
> Hi,
>
> On Fri, Feb 04, 2022 at 04:03:52PM +0100, Joakim Roubert wrote:
> > On 2022-02-04 15:30, Mans Zigher wrote:
> > >
> > > with our current understanding our customer cannot comply with GPLv3
> > > so we have to avoid it at all cost.
> >
> > I think this is a situation where
> >
> > https://layers.openembedded.org/layerindex/branch/master/layer/meta-gplv2/
> >
> > might come in handy, together with something like
> >
> > PREFERRED_VERSION_bash ?= "3.2.%"
> >
> > in the local.conf (or similar suitable configuration place).
>
> While this would work, I can't recommend using meta-gplv2 as it contains unmaintained
> SW versions.
>
> Just configure the build to avoid GPLv3 via distro config, e.g.
>
> INCOMPATIBLE_LICENSE_append += " GPLv3 GPLv3+ LGPLv3 LGPLv3+"
>
> and configure SW components to build without GPLv3 dependencies.
> lxc for examples compiles just fine without rsync and bash.
>
> Additionally a lot of GPLv3 recipes can be enabled to build but be forbidden
> images images, e.g. in distro config:
>
> WHITELIST_GPL-3.0 += "bash"
> PACKAGE_EXCLUDE += "bash-ptest bash-dbg bash-staticdev bash-dev bash-doc bash-locale bashbug bash"
>
> Some refactoring of SW architecture may be needed to remove any dependencies to GPLv3
> licensed SW. For development and testing GPLv3 components can often be used.
>
> Cheers,
>
> -Mikko
> -=-=-=-=-=-=-=-=-=-=-=-
> Links: You receive all messages sent to this group.
> View/Reply Online (#7048): https://lists.yoctoproject.org/g/meta-virtualization/message/7048
> Mute This Topic: https://lists.yoctoproject.org/mt/88903092/3617459
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> -=-=-=-=-=-=-=-=-=-=-=-
>

Re: [meta-virtualization] Docker and GPLv3

[Embedded Devel]

On Friday 04 February 2022 15:53:42 PM (+07:00), Mans Zigher wrote:

> Hi,
>
> A client of mine wants to have docker on it's product and they are
> having secure boot enabled which prevents us from having any GPLv3
> licensed code on the target. 
Okay, wait, why does enabling secure-boot prevent including GPLv3 packages??
Ive never heard this before.

Re: [meta-virtualization] Docker and GPLv3

[Måns]

Hi,

Well, does GPLv3 not require that a customer should be able to build
the GPLv3 like bash and deploy it to the target? It is not directly
secure-boot but the customer has a boot up sequence that starts with
secure boot and then the rootfs needs to be signed. So it would not be
possible to open up the device to allow a customer to deploy his own
version of bash on the target. But I might have misunderstood GPLv3. I
am not an expert.

BR
Måns Zigher

Den fre 4 feb. 2022 kl 15:19 skrev Embedded Devel <yocto@optimcloud.com>:
>
>
>
> On Friday 04 February 2022 15:53:42 PM (+07:00), Mans Zigher wrote:
>
> > Hi,
> >
> > A client of mine wants to have docker on it's product and they are
> > having secure boot enabled which prevents us from having any GPLv3
> > licensed code on the target.
> Okay, wait, why does enabling secure-boot prevent including GPLv3 packages??
> Ive never heard this before.

Re: [meta-virtualization] Docker and GPLv3

[Embedded Devel]

On Friday 04 February 2022 21:23:18 PM (+07:00), Måns wrote:

> Hi,
>
> Well, does GPLv3 not require that a customer should be able to build
> the GPLv3 like bash and deploy it to the target? It is not directly
> secure-boot but the customer has a boot up sequence that starts with
> secure boot and then the rootfs needs to be signed. So it would not be
> possible to open up the device to allow a customer to deploy his own
> version of bash on the target. But I might have misunderstood GPLv3. I
> am not an expert.
>
> BR
> Måns Zigher
ermmm no... my understanding is if a device is bootlocked.. grub or secure-boot, then the vendor only needs to provide a way a client having ownership of the device
can make, rebuild, duplicate, circumvent the secure-boot. ie... make it undoable/bypassable and as long as they allow users to install their own secure boot keys

now im not  LAWYER .... However.... if a client can regenerate keys/bootloader/image then i believe your safe.

>
> Den fre 4 feb. 2022 kl 15:19 skrev Embedded Devel <yocto@optimcloud.com>:
> >
> >
> >
> > On Friday 04 February 2022 15:53:42 PM (+07:00), Mans Zigher wrote:
> >
> > > Hi,
> > >
> > > A client of mine wants to have docker on it's product and they are
> > > having secure boot enabled which prevents us from having any GPLv3
> > > licensed code on the target.
> > Okay, wait, why does enabling secure-boot prevent including GPLv3 packages??
> > Ive never heard this before.
>
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