No, it's only supported for images at the moment, as the documentation
says:
--extension=PATH
Add an additional image PATH as an overlay on top of IMAGE
when attaching/detaching. This argument can
be specified multiple times, in which case the order in
which images are laid down follows the rules
specified in systemd.exec(5) for the ExtensionImages=
directive. The image(s) must contain an
extension-release file with metadata that matches what is
defined in the os-release of IMAGE. See: os-
release(5).
The internal implementation of extensions is ExtensionImage= which as
the name says, it's for binary images. There's no ExtensionDirectory=
yet - no reason it can't there be one, just someone needs to implement
it. PRs welcome!
On Wed, 2021-10-20 at 17:04 +0200, Umut Tezduyar Lindskog wrote:
> It indeed worked as squashfs image. Thanks for that.
>
> It is not working as a folder though (portablectl --runtime attach --
> extension=./stackupper ./base stackupper) This stuff should work on
> folders too right? Should I open a ticket?
>
> Also, when it works, the upper stack shows as detached. Isn't that
> wrong too? Should I open a ticket?
>
> root@osboxes:/home/osboxes/Development# portablectl attach --runtime
> --extension $PWD/stackupper.raw $PWD/base.raw stackupper
> (Matching unit files with prefixes 'stackupper'.)
> Created directory /run/systemd/system.attached.
> Created directory /run/systemd/system.attached/stackupper.service.d.
> Written /run/systemd/system.attached/stackupper.service.d/20-
> portable.conf.
> Created symlink /run/systemd/system.attached/stackupper.service.d/10-
> profile.conf →
> /usr/lib/systemd/portable/profile/default/service.conf.
> Copied /run/systemd/system.attached/stackupper.service.
> Created symlink /run/portables/stackupper.raw →
> /home/osboxes/Development/stackupper.raw.
> Created symlink /run/portables/base.raw →
> /home/osboxes/Development/base.raw.
> root@osboxes:/home/osboxes/Development# portablectl list
> NAME TYPE RO CRTIME MTIME
> USAGE STATE
> base raw no Wed 2021-10-20 10:54:41 EDT Wed 2021-10-20
> 10:54:41 EDT 920.0K attached-runtime
> stackupper raw no Wed 2021-10-20 10:54:57 EDT Wed 2021-10-20
> 10:54:57 EDT 36.0K detached
>
>
> Thanks again
> Umut
>
> On Wed, Oct 20, 2021 at 12:01 AM Luca Boccassi <bluca@xxxxxxxxxx>
> wrote:
> > On Tue, 2021-10-19 at 16:09 +0200, Umut Tezduyar Lindskog wrote:
> > > Hi Luca, have you had time to help me out or do you think you
> > could
> > > help me
> > > out? Thanks in advance.
> >
> > Works fine for me with systemd 249.5:
> >
> > $ tar xf ~/Downloads/portable.tar
> > $ mksquashfs base/ base.raw
> > Parallel mksquashfs: Using 4 processors
> > Creating 4.0 filesystem on base.raw, block size 131072.
> > [==================================================================
> > =====================================|] 23/23 100%
> >
> > Exportable Squashfs 4.0 filesystem, gzip compressed, data block
> > size 131072
> > compressed data, compressed metadata, compressed fragments,
> > compressed xattrs, compressed ids
> > duplicates are removed
> > Filesystem size 918.80 Kbytes (0.90 Mbytes)
> > 39.83% of uncompressed filesystem size (2306.95 Kbytes)
> > Inode table size 359 bytes (0.35 Kbytes)
> > 35.69% of uncompressed inode table size (1006 bytes)
> > Directory table size 319 bytes (0.31 Kbytes)
> > 62.80% of uncompressed directory table size (508 bytes)
> > Number of duplicate files found 3
> > Number of inodes 29
> > Number of files 9
> > Number of fragments 2
> > Number of symbolic links 0
> > Number of device nodes 0
> > Number of fifo nodes 0
> > Number of socket nodes 0
> > Number of directories 20
> > Number of ids (unique uids + gids) 1
> > Number of uids 1
> > luca (1000)
> > Number of gids 1
> > luca (1000)
> > $ mksquashfs stackupper/ stackupper.raw
> > Parallel mksquashfs: Using 4 processors
> > Creating 4.0 filesystem on stackupper.raw, block size 131072.
> > [==================================================================
> > =======================================|] 3/3 100%
> >
> > Exportable Squashfs 4.0 filesystem, gzip compressed, data block
> > size 131072
> > compressed data, compressed metadata, compressed fragments,
> > compressed xattrs, compressed ids
> > duplicates are removed
> > Filesystem size 33.94 Kbytes (0.03 Mbytes)
> > 41.81% of uncompressed filesystem size (81.18 Kbytes)
> > Inode table size 269 bytes (0.26 Kbytes)
> > 34.98% of uncompressed inode table size (769 bytes)
> > Directory table size 261 bytes (0.25 Kbytes)
> > 58.78% of uncompressed directory table size (444 bytes)
> > Number of duplicate files found 2
> > Number of inodes 24
> > Number of files 5
> > Number of fragments 1
> > Number of symbolic links 1
> > Number of device nodes 0
> > Number of fifo nodes 0
> > Number of socket nodes 0
> > Number of directories 18
> > Number of ids (unique uids + gids) 1
> > Number of uids 1
> > luca (1000)
> > Number of gids 1
> > luca (1000)
> > $ sudo portablectl attach --runtime --extension $PWD/stackupper.raw
> > $PWD/base.raw stackupper
> > (Matching unit files with prefixes 'stackupper'.)
> > Created directory /run/systemd/system.attached.
> > Created directory
> > /run/systemd/system.attached/stackupper.service.d.
> > Written /run/systemd/system.attached/stackupper.service.d/20-
> > portable.conf.
> > Created symlink
> > /run/systemd/system.attached/stackupper.service.d/10-profile.conf →
> > /usr/lib/systemd/portable/profile/default/service.conf.
> > Copied /run/systemd/system.attached/stackupper.service.
> > Created symlink /run/portables/stackupper.raw →
> > /tmp/portable/stackupper.raw.
> > Created symlink /run/portables/base.raw → /tmp/portable/base.raw.
> > $ sudo systemctl start stackupper
> > $ systemctl status stackupper
> > ○ stackupper.service
> > Loaded: loaded
> > (/run/systemd/system.attached/stackupper.service; static)
> > Drop-In: /run/systemd/system.attached/stackupper.service.d
> > └─10-profile.conf, 20-portable.conf
> > Active: inactive (dead)
> >
> > Oct 19 22:57:16 luca-desktop tree[100886]: | | | | |--
> > oom_score
> > Oct 19 22:57:16 luca-desktop tree[100886]: | | | | |--
> > oom_score_adj
> > Oct 19 22:57:16 luca-desktop tree[100886]: | | | | |--
> > pagemap
> > Oct 19 22:57:16 luca-desktop tree[100886]: | | | | |--
> > patch_state
> > Oct 19 22:57:16 luca-desktop tree[100886]: | | | | |--
> > personality
> > Oct 19 22:57:16 luca-desktop tree[100886]: | | | | |--
> > projid_map
> > Oct 19 22:57:16 luca-desktop tree[100886]: | | | | |-- root
> > -> [Error\ reading\ symbolic\ link\ information]
> > Oct 19 22:57:17 luca-desktop systemd[1]: stackupper.service:
> > Deactivated successfully.
> > Oct 19 22:57:17 luca-desktop systemd[1]: Finished
> > stackupper.service.
> > Oct 19 22:57:17 luca-desktop systemd[1]: stackupper.service:
> > Consumed 1.022s CPU time.
> >
> > > On Mon, Oct 18, 2021 at 12:56 PM Umut Tezduyar Lindskog
> > > <umut@xxxxxxxxxxxx>
> > > 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@xxxxxxxxxx>
> > > > 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@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@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@xxxxxxxxxx>
> > > > > > 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@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@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@osboxes:/home/osboxes/Development# cat
> > > > > > > > stackupper/usr/lib/systemd/system/stackupper.service
> > > > > > > > [Service]
> > > > > > > > Type=oneshot
> > > > > > > > ExecStart=/usr/bin/cat /etc/os-release
> > > > > > > > root@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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