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Now that EROFS is detected by util-linux, the actions to mount a squashfs or erofs image are basically the same. The _mnt_sfs and _mnt_erofs functions can be merged into one: _mnt_fs.
If neither airootfs.sfs nor airootfs.erofs are found, error out to interactive shell.
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STP (Spanning Tree Protocol). STP defaults to 15 + 15 seconds on a lot of popular devices for listening and learning states. Which if not disabled (which you should on access switches, sure..) most netboots will fail intermittently due to the port access on switches performing port learning while the machine is trying to get DHCP leases.
Added comment referencing to why the 60 seconds.
More information can be found here: https://www.ciscopress.com/articles/article.asp?p=2832407&seqNum=6 and
https://techhub.hpe.com/eginfolib/networking/docs/switches/5980/5200-3921_l2-lan_cg/content/499036677.htm
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right after
This prevents errors when the device is already mounted read-only somewhere else (e.g. if cow_device and archisodevice are the same).
Partially reverts d0d7eb25cf503753cb1452756059a281289e7a41
Fixes #9.
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Now that the archiso_shutdown is removed, nothing uses this file anymore and it is not needed.
Additionally, cowspace is mounted read-write on first mount, not mounted read-only and then remounted read-write.
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The functionality it provides has been available in mkinitcpio itself since 2013.
https://lists.archlinux.org/pipermail/arch-dev-public/2013-December/025742.html
Implements #8.
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It was only used because util-linux did not support detecting EROFS and the mount command required `-t erofs` to mount EROFS.
util-linux 2.37 supports detecting EROFS; see https://github.com/util-linux/util-linux/commit/7b2a874e2ee306e9503210f8aa5eed7f53c06755.
Now that the workaround is not needed anymore, it can be removed.
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{hooks,install,script}/*:
Fix formatting in all scripts using shfmt.
Replace a few echo calls with printf.
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use pv to give feedback on copying the airootfs to RAM when copytoram
kernel parameter is given
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archiso/initcpio/hooks/archiso_pxe_common:
Disable shellcheck's SC3060, as ash is able to do bash-like string replacements.
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EROFS, like Squashfs, is a read-only file system. It can be used to store airootfs in an image file.
Its advantage is the support for POSIX ACLs. EROFS downside is that currently it only supports LZ4 compression (LZMA support is not yet fully implemented).
A difference from Squashfs is that, EROFS stores change time (ctime) not modification time (mtime). The reverse is true for Squashfs.
Implements https://gitlab.archlinux.org/archlinux/archiso/-/issues/59
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Remove /run/archiso/bootmnt directory if nothing is mounted there. An empty directory is just confusing.
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Booting via PXE we want to keep our DNS configuration. So remove
/etc/resolv.conf in new root before copying the current file.
Without this systemd-resolved fallback nameservers are used and we see an
error message when the root ships a symbolic link to systemd-resolved's
stub-resolv.conf:
cp: not writing through dangling symlink '/new_root/etc/resolv.conf'
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command
Apparently blockdev does not support it.
In an ISO made using '-s img' (Squashfs with dm-snapshot), it results in:
blockdev: Unknown command: --
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LICENSE:
Add GPL-3.0 license.
{{archiso,configs}/*,.editorconfig,.gitlab-ci.yml}:
Add SPDX license identifier.
Makefile:
Add SPDX license identifier.
Install the `run_archiso.sh` script as global executable `run_archiso`.
Use -D and -t flags to install to install files more generically (without a previous call to install the directory).
README.rst:
Add README outlining the project's scope, how to build images from the profiles and how to test.
AUTHORS.rst:
Add list of all direct contributors to the repository.
CONTRIBUTING.rst:
Add basic contribution guidelines, explaining the linter and the license in use.
Closes #7
Closes #3
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Having a shellcheck directive and custom comments in the same line can trigger SC1107 on old versions of shellcheck.
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archiso/initcpio/install/*:
Setting bash shebang for all scripts and making them comform with shellcheck.
archiso/initcpio/{hooks,script}/*:
Setting ash shebang for all scripts and making them comform with shellcheck (for dash, as shellcheck has no ash specific
ruleset). Essentially the ash based scripts should be POSIX compliant as much as possible to have an easier time
writing, debugging and maintaining them.
Ensuring that variables are not treated as options and introducing variable quoting.
.gitlab-ci.yml:
Integrating shellcheck for initcpio scripts.
Closes #32
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The kernel has an open file handle after setting up the mapping. We can
remove it early to make sure it is gone on shutdown.
This helps to keep the cow_device clean for non-persistent systems where
cow_directory contains a version specific string.
Signed-off-by: Christian Hesse <mail@eworm.de>
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Nobody wants to use md5 these days...
Signed-off-by: Christian Hesse <mail@eworm.de>
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Signed-off-by: David Thurstenson <thurstylark@gmail.com>
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Signed-off-by: David Thurstenson <thurstylark@gmail.com>
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Signed-off-by: Christian Hesse <mail@eworm.de>
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Signed-off-by: Christian Hesse <mail@eworm.de>
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Signed-off-by: Christian Hesse <mail@eworm.de>
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Signed-off-by: Christian Hesse <mail@eworm.de>
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Signed-off-by: Christian Hesse <mail@eworm.de>
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Signed-off-by: Christian Hesse <mail@eworm.de>
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Signed-off-by: Christian Hesse <mail@eworm.de>
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According to ip-address(8) flushing an interface requires the
keyword 'dev'.
Also add proper quoting.
Signed-off-by: Christian Hesse <mail@eworm.de>
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Signed-off-by: Christian Hesse <mail@eworm.de>
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Signed-off-by: Christian Hesse <mail@eworm.de>
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Signed-off-by: Christian Hesse <mail@eworm.de>
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This should fix FS#36749
Also flush address on specified device (default)
Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@gmail.com>
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Fixes: e7ea394e5181de37a403b29e55d89afc34fdb867
Signed-off-by: Christian Hesse <mail@eworm.de>
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Having files on btrfs subvolumes requires to give mount options. Add
boot params archisoflags= and cow_flags= for this purpose. Boot
parameters could look like this:
... archisodevice=/dev/sdaX archisoflags=subvolume=isos
cow_device=/dev/sdaX cow_flags=subvolume=persist ...
Signed-off-by: Christian Hesse <mail@eworm.de>
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Currently, when booting loopmounted iso file, it is necessary to
specify not only img_dev and img_loop (which should be sufficient),
but also archisolabel or archisodevice. With this patch, archisodevice
is directly populated with the correct loop device, and it is not
necessary to specify the label when booting from loopmounted iso,
which makes for leaner and cleaner grub.cfg.
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We received an IP address from DHCP server and configure it statically.
This is required if we continue to use network connectivity to access
the root device (for example via NBD or NFS).
The lease is not updated, though. This can cause trouble in networks
with low lease times. So let's flush the addresses if root filesystem
has been copied to RAM. A dhcp client in main system can handle the
network connectivity then.
Signed-off-by: Christian Hesse <mail@eworm.de>
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Signed-off-by: Christian Hesse <mail@eworm.de>
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Signed-off-by: Christian Hesse <mail@eworm.de>
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Umount detaches the loop device automatically, but let's make it
explicit to be sure. Additionally losetup gives:
losetup: /dev/loop0: detach failed: No such device or address
This is kind of expected, let's silent the error message.
Signed-off-by: Christian Hesse <mail@eworm.de>
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The name is more relevant since the usage is shared for both
dm-snapshot and overlayfs.
Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@gmail.com>
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This is the first attemp to test overlayfs in archiso.
The current dm-snapshot mode is keep and is enabled by default,
while the new mode is enabled via "-s sfs" to mkarchiso.
No new boot parameters are added, since archiso hooks detects
if the .sfs file is for dm-snapshot (airootfs.img inside)
or for overlayfs.
Persistence is supported in overlayfs mode using the same options
(cowlabel or cowdevice), but warning while in dm-snapshot mode,
only one file is used (airootfs.cow), in overlayfs mode internal
files for workdir/ and upperdir/ are allocated, so you can not use
VFAT or NTFS.
To test this, you need to enable [testing] in pacman.conf from
releng profile and edit build.sh then add "-s sfs" in make_prepare()
Look at:
setarch ${arch} mkarchiso ${verbose} -w "${work_dir}" -D "${install_dir}" prepare
Replace with:
setarch ${arch} mkarchiso ${verbose} -w "${work_dir}" -s sfs -D "${install_dir}" prepare
The build requires just half of space that the build for dm-snapshot,
since there is no ext4 img ;)
Just to remember: there is no space gain in .sfs (just about 2M)
There is at least one thing during boot with machine-id service:
Dec 24 03:31:39 archiso systemd-machine-id-commit[183]: Failed to unmount transient /etc/machine-id file in our private namespace: Invalid argument
Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@gmail.com>
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Copying big amount of data results in bad performance as data is
written in chunks of 4kiB (8 * 512 bytes).
The default is not changed but can be overwritten.
Signed-off-by: Christian Hesse <mail@eworm.de>
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Signed-off-by: Christian Hesse <mail@eworm.de>
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Since now cowspace_size == cowfile_size (only one file inside)
Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@gmail.com>
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Move from percent to explicit size and set a default of 256M (sparse)
Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@gmail.com>
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Currently, when booting via HTTP, the airootfs.md5 file is downloaded to
/run/archiso/bootmnt/arch/. However, the checksum file is later assumed
to be located at "/run/archiso/bootmnt/arch/${arch}". Fix the _curl_get
invocation and directly place the file in the right directory.
Fixes a regression introduced in commit 5506e1e ([archiso] Rework
checksum function, 2014-06-28).
Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>
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