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There's a need for a separate boot target since
persistent storage is way slower than tmpfs indeed;
usbflash has a tendency for huge performance drops
given simultaneous writes in addition to reads which
are the bottleneck already.
make-initrd-propagator 0.18 introduced ext4 rw slice,
so the corresponding kernel module needs to be included
into stage1; see also #28289.
NB: not available on x86_64-efi (or hybrid GPT to be strict)
due to fragility of the hack being made: parted(8) panics
upon seeing that, and good ol' fdisk is unable to treat it.
NB: use/live/rw use/rescue/rx use/syslinux/ui/gfxboot
are unlikely to play very nice together due to the latter's
magic l10n: "session" label is taken by live_rw config snippet
and *is* translated in design-bootloader-source;
OTOH "rescue_session" is *not*.
The issue is that r8169 is rather broken nowadays while
r8168 tends to work on the same hardware; see also #28473.
Thanks zerg@ for having hinted that it's stage1 modules,
not the root squashfs.
The initial approach required some quite involved postprocessing
as described in http://www.altlinux.org/UEFI#HOWTO; after having
ironed out the kinks so that initial EFI support could be merged
into mkimage proper we're better off just using it, eh?
The newer kernels have versioned NFS support code moved
into a few separate modules with nice self-explanatory
messages reading "Protocol not supported" if one has
managed to overlook this; thanks boyarsh@ for heads-up
(based on f545923271f9d1938d1887632ab4697c4c009039 m-p-d).
The issue actually hit image.in/Makefile: "metadata" target
in features.in/metadata/lib/50-metadata.mk wasn't reached
even if features.in/build-distro/lib/90-build-distro.mk
would ACK that the "whatever" actions included "metadata";
thus Metadata/pkg-groups.tar wasn't created and the installer
silently failed to install the .base system.
Let's armour the rest of the cases where the order of inclusion
might be important as well.
hsh-initroot leaves the chroot's root directory permissions
as 1775 while these should really be 755 at most; let's fix it
(important for both VE and VM images, useful for rescue/livecd
ones as well -- especially those with an installer onboard).
That sub/stage2/install2 was somewhat clumsy actually as it looked
like a hierarchical thing while being a substitution thing:
generic stage2 would get put in place renamed as install2.
This could only get worse with hierarchical features which have
already been both requested and considered for quite a time,
and "stage2 at install2" reads much more naturally.
There were heaps of "if type -t git" there already;
it wasn't an unintentional mishap but rather a moderate
copy-paste to get the use cases, and now these seem to
have essentially settled.
So time to scrap some dups.
NB: the scripts in the generated profile can't rely on
the contents of the metaprofile (these need to be able
to work in standalone case either), so a bit of crap
still lurks there.
An initial draft of it was done half a year ago but several tricky
thingies had kept the code from showing up as it was rather brittle
and incomplete.
This implementation involves quite a few changes all over the place
but finally works good enough for live and installer images.
Please pay attention to the versions of these packages:
- installer-feature-setup-plymouth (0.3.2-alt1+)
- branding-altlinux-sisyphus (20110706-alt2+ if used)
- plymouth (0.8.3-alt20.git20110406+)
See also:
- http://www.altlinux.org/Branding
- http://www.altlinux.org/Plymouth
The early version considered ISO and KOI encoding families
as obsolete; the current one is a bit more wise and knows
these are just /rare/. Thanks glebfm@ for #27168 research
and cinnamon by slava@ for ISO-related noises at startup.
There were STAGE1_PACKAGES_REGEXP and MAIN_PACKAGES_REGEXP
but adding more of those was postponed to avoid bloat and
bitrot; THE_PACKAGES_REGEXP is needed for use/firmware now
and looks like BASE_PACKAGES_REGEXP and LIVE_PACKAGES_REGEXP
will be useful before too long either.
Docs updated to include stage-specific package related vatiables.
The existing implementation would handle kernel differences
just fine but a bit too automatically: if it sees xz support,
that's what will end up being used (and if there's -Xbcj binary
compression filter available for the target platform, it will
be applied unequivocally either).
It's perfectly suitabe for getting fine-tuned release images
but is also a bit too resource-consuming while developing the
image configuration which has no business with its compression.
The one and only knob is SQUASHFS (see doc/variables.txt);
to give an idea of the differences, here are some numbers
for a mostly-binary (43% as per 99-elf-stats) webkiosk livecd
and a rather less so (18%) flightgear one on a dual quad-core
X5570 node (each mksquashfs run used up all the cores):
SQUASHFS | live-webkiosk.iso | live-flightgear.iso
---------+-------------------+---------------------
fast | 3:30 / 130M | 5:11 / 852M
normal * | 3:37 / 100M | 5:35 / 688M
tight | 3:50 / 98M | 6:47 / 683M
Thus if the knob isn't fiddled with, the defaults will allow
for a reasonably fast build of a pretty slim image; if one is
building a release or if a particular image is very sensitive
being close to the media capacity then just add SQUASHFS=tight
and see it a percent or two down on size.
Please note that lzo/gzip-compressed images are also quicker
to uncompress thus further helping with test iterations.
Thanks to led@ and glebfm@ for helpful hints and questions.
This kind of test was proposed by led@ to gather statistics
on chroot's contents going to become squashfs (the script
optimizations lowering added overhead from ~10 sec down
to a subsecond range were also proposed by him).
Intentionally not documented in doc/variables.txt due to
the rather lowlevel nature of the probe (at least so far).
The knobs involved are SQUASHFS (the additional effort kicks
in only for "tight" case) and GLOBAL_SQUASHFS_SORT (must be
non-empty for this extra overhead to occur).
Additional experimentation is needed to find out whether
the difference in squashfs size and performance is worth
the trouble (seems the impact is non-zero but pretty minor).
There's much reason for reuse instead of duplication
among the different stage2-based subprofiles.
In particular, the rather monolithic driver cleanup script
of the ancient is better done in several clear pieces with
the final depmod run.
Scripts dropping apt/rpm databases will dump pkglist first.
A script purging /boot/* will honour live-install if present.
Minor inno^Wfixups all over the map too.
Fixed up the remnants of the early style mix
to correspond to the proposed doc/style.txt;
the rationale being that
if [ ... ]; then
...
...
fi
is the more readable construct among itself,
if test ...; then
...
...
fi
and
[ ... ] && {
...
...
}
due to the condition being more distinguishable
when bracketed and the body more apparent as the
one inside "if" and not any other block; the less
obvious difference is that the final construct of
the latter form is prone to the whole script exit
status being non-zero if the condition isn't met.
As too many things started duplicating between distros proper
and (e.g. corresponding) LiveCDs, it became apparent that a class
of entities which end up working for THE_USER (not a sysadmin,
and not a developer, just a Linux user) is in need.
So THE_KMODULES will power installed basesystem and live image,
while THE_PACKAGES, THE_LISTS and THE_GROUPS will participate
in building those.
We've got some parts of it in build-distro feature,
and some went to dev feature for no real reason.
But a bare installer might go without package base,
and LiveCDs other than live-builder might find local
repository useful given aufs2 root overlay.
Now the overall scheme is more straightforward:
- a distro:
+ asks that a package repo be included
+ cares to further add the packages to it
- a repo feature:
+ pulls in sub/main for it to happen
+ provides genbasedir script to create repo metadata
+ supplements live feature with repo configuration
This might be needed to install onto an SD card in a "native"
(non-USB-mediated) SD/MMC cardreader; thanks Vladimir Karpinsky
and gns@ for going over it for liveflash.eeepc case.
- toplevel README received some long-needed refactoring
+ lowlevel detail moved, well, to lowlevel READMEs
- reflected more thoroughly that m-p is not about distros anymore
- dropped features.in/00example/README.en: it's already out-of-date
a bit, and there's no perceived need in thorough English docs so far
- wiki article got split into parts and somewhat rewritten, links updated
- mv doc/{CodingStyle,style.txt}
If you make distro/live-builder.iso, the result is an image
containing almost everything (short of actual full enough
repository) to rebuild itself. It will attempt to configure
eth0 with DHCP and reach http://ftp.altlinux.org for packages.
RAM requirements start with 2Gb, self-build is accomplished
on a 4Gb host with "make CLEAN=1 distro/live-builder.iso".
Packages required for "make distro/syslinux.iso" get included.
(some due fixups all over the place too)
Typical (to-be-refactored when having settled down)
"cd/git .../cd -" sequences are tweaked to safeguard
against changing back without having actually changed to,
just in case.
features.in/Makefile left with pushd/popd due to its
three-level diving course (which somewhat asks to be
refactores in functions either but is intrinsically
somewhat complex OTOH).
This is quite a large-scale change since mkimage-profiles got used to
baking distributions over the last year, and virtual environments are
quite different, so e.g. image.in/Makefile had to be split in two with
the main part of it moved into features.in/iso/lib/.
Short overview:
- features.in/Makefile: lib/ support
(supporting VE images requires dynamic modifications
to image.in/Makefile before starting the build;
the most natural way to achieve that seems to use
features mechanism along with makefile include dir)
- packaging format related part moved into features.in/pack
(should be better prepared for diversity either)
- features.in/iso renamed to features.in/build-distro
- features.in/ve renamed to features.in/build-ve
+ NB: these could not be merged as e.g. features.in/build
due to completely different script hooks
- lib/image.mk renamed to lib/build.mk
- image, config, log postprocessing moved downstream
- added a sort of a topping in the form of lib/sugar.mk
- assorted style fixups (like ifeq usage)
- clean.mk: reliability fix (the problem was observed by Oleg Ivanov
and me too but finally it did get the attention quantum)
- reviewed, updated and extended docs
+ QUICKSTART: should be[come] a step-by-step guide
(thanks Leo-sp50 for prodiving feedback)
This is a sort of anti-feature which removes and not builds;
still with mkimage-profiles' approach we can at least build
up the removal procedures as well.
It's what triggered the tagged scripts, BTW.
It was clear that "common" isn't very apt for packages that
will get *everywhere*, and became apparent when the need for
a "base+live packages" variable arrived with powerbutton feature.
So:
- the former COMMON_PACKAGES are now SYSTEM_PACKAGES;
- COMMON_PACKAGES act as "BASE+LIVE_PACKAGES".
Note that SYSTEM_PACKAGES also got factored out from stage2 based
features into stage2 subprofile itself; cleanups were due as well.
Rather minor fixups for things changed in the meanwhile and not
yet (re)documented properly; and a change for memtest feature
to require syslinux feature (the code's been changed to fit
the updated description, actually, and the change is purely
formal as no syslinux alternative is being used/planned so far).
MAIN_GROUPS should align better along with MAIN_PACKAGES
and MAIN_LISTS (even if MAIN_ prefix might be suboptimal
given that these packages are essentially extras within
the particular image).
It's still very immature -- base lists should be really base,
and functionality should be sorted out in more consistent way.
So far moved to tagged lists (which need some more experimentation
anyways to get both lists and their use more elegant).
- fixed live.iso (now actually useful):
+ extra cleanup was being done (coming from install2 case)
+ root user was password blocked
+ there was no unprivileged user (added "altlinux" w/o password)
+ added xdm setup hook for future X-based livecd flavours
+ several picks for a less slim "base" list
+ xdm login
- tweaked rescue.iso (added ext3grep)
- better *_LISTS printout
- somewhat cleaner .base comments
- more comprehensible git log messages
+ special handling for complex subprofiles
+ no need to commit build.log ;-)
- introduced generic stage2 subprofile (non-standalone)
- ported installer and rescue over to stage2/{install2,rescue}
- initial stage2/live (needs more work for sure)
- use make-initrd-propagator
- updated and somewhat extended doc/
NB: mind #26133, #26134
s,INSTALLER_KFLAVOUR,STAGE1_KFLAVOUR,g
s,INSTALLER_KMODULES,STAGE1_KMODULES,g
install2 isn't the only livecd around;
so far all of these share the same kernel
in m-p-d, and we'd rather need two+ kernels
with dual-arch media or so; let's not complicate
things too much at this point
In particular:
- .base is now generated from pieces (see image.in/Makefile)
- s/DISTROS/IMAGES/g; s/CONFIGS/DISTROS/g (for clarity)
- s/DISK_LISTS/MAIN_LISTS/g ("disk" was early m-p-d legacy)
- introduced BASE_PACKAGES to complement BASE_LISTS
- minor tweaks to Makefile (ARCH and DATE moved elsewhere)
- libdistro.mk: dropped overlooked IMAGE_INIT_LIST copy
- clean.mk: silly cleanup
