[systemd-devel] stacked extension not working

[Umut Tezduyar Lindskog]

Hi Luca, have you had time to help me out or do you think you could help me
out? Thanks in advance.

On Mon, Oct 18, 2021 at 12:56 PM Umut Tezduyar Lindskog <umut at tezduyar.com>
wrote:

> Hi again. I tried renaming (
> https://www.freedesktop.org/software/systemd/man/os-release.html) it but
> that didn't work. I am not getting any errors during the attachment phase
> so I am not sure if the failure is due to extension file in any way.
>
> A wish list is to be more verbose regarding what is going on during
> extension file check/comparison and during overlaying /usr and /opt. I
> think portablectl is quite verbose when it comes to preparing files, symb
> links and what I wish fits well.
>
> Could you please try it yourself? I put them in
> https://drive.google.com/file/d/1LoN_swR7jgvo5yxajWjYK5ck_e8kJs1W/view?usp=sharing
> there should be a download button on the top right. Appreciate your help.
>
> Thanks,
> Umut
>
>
> On Fri, Oct 15, 2021 at 3:46 PM Luca Boccassi <bluca at debian.org> wrote:
>
>> On Fri, 2021-10-15 at 14:59 +0200, Umut Tezduyar Lindskog wrote:
>> > Thanks and I would have never figured it out without your help.
>> > However, moving the binary to /opt didn't work either (I made sure
>> > there is empty /opt in the base too). Anything else I am missing?
>> >
>> > root at osboxes:/home/osboxes/Development# tree stackupper/
>> > stackupper/
>> > ├── bin
>> > │   └── umut
>> > ├── dev
>> > ├── etc
>> > │   ├── machine-id
>> > │   ├── resolv.conf
>> > │   └── runtime
>> > ├── lib -> usr/lib
>> > ├── opt
>> > │   └── tree
>> > ├── proc
>> > ├── root
>> > ├── run
>> > ├── sys
>> > ├── tmp
>> > ├── usr
>> > │   ├── bin
>> > │   └── lib
>> > │       ├── extension-release.d
>> > │       │   └── extension-release.base
>> > │       └── systemd
>> > │           └── system
>> > │               └── stackupper.service
>> > └── var
>> >     └── tmp
>> >
>> > 18 directories, 7 files
>> > root at osboxes:/home/osboxes/Development# cat
>> > stackupper/usr/lib/systemd/system/stackupper.service
>> > [Service]
>> > Type=oneshot
>> > ExecStart=/opt/tree /
>>
>> The extension-release file in the extension must be named exactly after
>> the extension (eg: foo.raw must contain /usr/lib/extension-
>> release.d/extension-release.foo), but in your case it's called ".base"
>> which doesn't seem right, so double check that. This too is documented
>> in the man page.
>>
>> > On Fri, Oct 15, 2021 at 2:23 PM Luca Boccassi <bluca at debian.org>
>> > wrote:
>> > > On Fri, 2021-10-15 at 12:18 +0000, Umut Tezduyar Lindskog wrote:
>> > > > Hi, following works for us (for reference, configuration is
>> > > printed
>> > > > at the end)
>> > > >
>> > > > portablectl --now attach --extension=./stackupper ./base
>> > > stackupper
>> > > >
>> > > > However, if we move the cat from base/usr/bin/cat to
>> > > > stackupper/bin/cat it is not working. Seems like we cannot
>> > > include
>> > > > any library/executable in the extension.
>> > > >
>> > > > Are we missing something?
>> > > >
>> > > >
>> > > > root at osboxes:/home/osboxes/Development# tree base/
>> > > > base/
>> > > > ├──bin
>> > > > ├──dev
>> > > > ├──etc
>> > > > │   ├── machine-id
>> > > > │   ├── os-release
>> > > > │   └── resolv.conf
>> > > > ├──lib
>> > > > │   └── x86_64-linux-gnu
>> > > > │       └── libc.so.6
>> > > > ├──lib64
>> > > > │   ├──ld-2.32.so
>> > > > │   └── ld-linux-x86-64.so.2
>> > > > ├──proc
>> > > > ├──root
>> > > > ├──run
>> > > > ├──sys
>> > > > ├──tmp
>> > > > ├──usr
>> > > > │   ├──bin
>> > > > │   │   ├──cat
>> > > > │   │   ├──echo
>> > > > │   │   └── tree
>> > > > │   └── lib
>> > > > │       └── systemd
>> > > > │           └── system
>> > > > └── var
>> > > >     └── tmp
>> > > >
>> > > > 18 directories, 9 files
>> > > >
>> > > > root at osboxes:/home/osboxes/Development# tree stackupper/
>> > > > stackupper/
>> > > > ├──bin
>> > > > │   └── umut
>> > > > ├──dev
>> > > > ├──etc
>> > > > │   ├── machine-id
>> > > > │   ├── resolv.conf
>> > > > │   └── runtime
>> > > > ├──lib -> usr/lib
>> > > > ├──proc
>> > > > ├──root
>> > > > ├──run
>> > > > ├──sys
>> > > > ├──tmp
>> > > > ├──usr
>> > > > │   ├──bin
>> > > > │   └── lib
>> > > > │       ├──extension-release.d
>> > > > │       │   └── extension-release.base
>> > > > │       └── systemd
>> > > > │           └── system
>> > > > │               └── stackupper.service
>> > > > └── var
>> > > >     └── tmp
>> > > >
>> > > > 17 directories, 6 files
>> > > >
>> > > > root at osboxes:/home/osboxes/Development# cat
>> > > > stackupper/usr/lib/systemd/system/stackupper.service
>> > > > [Service]
>> > > > Type=oneshot
>> > > > ExecStart=/usr/bin/cat /etc/os-release
>> > > > root at osboxes:/home/osboxes/Development#systemctl --version
>> > > > systemd 249 (249.4-1)
>> > > > +PAM +AUDIT +SELINUX +APPARMOR +IMA +SMACK +SECCOMP +GCRYPT
>> > > +GNUTLS -
>> > > > OPENSSL +ACL +BLKID +CURL +ELFUTILS -FIDO2 +IDN2 -IDN +IPTC +KMOD
>> > > > +LIBCRYPTSETUP -LIBFDISK +PCRE2 -PWQUALITY -P11KIT -QRENCODE
>> > > +BZIP2
>> > > > +LZ4 +XZ +ZLIB +ZSTD -XKBCOMMON +UTMP +SYSVINIT default-
>> > > > hierarchy=unified
>> > >
>> > > Hi,
>> > >
>> > > You need to build your extension with the binaries under either the
>> > > /usr or /opt hierarchies. Legacy locations like /bin and /lib are
>> > > ignored. This is explained in the systemd-sysext.8 manpage.
>> > >
>>
>>
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