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tl;dr: finally I went the easy and straight forward way from armbian,
including their kernel (sources) repo, as done similarly several times
before with some r'pis and raspbian:
- copy Armbian_19.11.3_Odroidxu4_stretch_legacy_4.14.150.img to
sdcard, mount to treat NIC issues as mentioned below.
- boot sd card, log in, apt dist-upgrade, install and run
debfoster (-i), reboot.
- change apt sources.list from "debian stretch" to "devuan
ascii", while keeping the armbian firmware and kernel repos
resp. pointing them to "stretch":
deb http://deb.devuan.org/merged ascii main
deb http://deb.devuan.org/merged ascii-security main
deb http://apt.armbian.com stretch main stretch-utils
- apt update, upgrade, dist-upgrade.
- install sysv-init, install and enable dropbear, disable the
openssh-server init script, reboot.
- purge systemd and leftover openssh-server dependencies
(including libsystemd0).
clone sdcard to emmc:
- dd sdcard to compressed image, copy image to network share
(or to sdcard's filesystem), boot sdcard, dd image to emmc.
- run /usr/sbin/nand-sata-install, toggle the xu4's boot
selector (hardware) switch and re-boot with sdcard removed.
install and configure services:
- nginx: I was surprised not to find any reasonable way to
http-upload a nested directory structure, preserving the
hierarchy (also, php-fpm had pulled in libsystemd0;) Thus:
- dpkg -P php-fpm && debfoster && apt install vsftpd
- done.
before I had tried:
first run with devuan_ascii_2.0.0_armhf_odroidxu4.img:
- - the system boots fine (as the logs will show later), but the NIC
does not come up (and my hdmi-to-dvi adapter is not
supported): /etc/network/interfaces file is configured for eth0, but
a udev-rule renames the USB-connected eth0 to enxMACMACMACMAC.
- - playing with net.ifnames=0 in /boot/boot.cmd and a MAC based
70-persistent-net.rules do not solve the issue, but after some
fscking the sdcard I get ssh access: keeping the new
70-persistent-net.rules in /lib/udev/rules.d/ while removing
73-usb-net-by-mac.rules, 75-persistent-net-generator.rules and
80-net-name-slot.rules fixes the issue reliably (as
editing /etc/network/interfaces probably would have done, too).
- - short delight, then modprobe ip_tables: module not found.
then arm-sdk with defaults:
- - building finishes smoothly, but besides the kernel (arm-sdk pulled
4.14.160), the result is identical to the precompiled image: after
fixing NIC naming and logging in, there is still no ip_tables module
available.
and later arm-sdk with armbian 19.11.3 "buster legacy 4.14.150" kernel
config (which has the iptables modules enabled):
- - same as before: (ifnames and) no iptables. uname shows a 4.14.48
kernel, while under /lib/modules there is a 4.14.160 directory
structure. transplanting kernel, modules and dtb from
Armbian_19.11.3_Odroidxu4_buster_legacy_4.14.150_minimal.img still
results in booting to 4.14.48. I wonder if I'd need to get into U-Boot
and/or determining the physical location of the zImage file? After a
quick look through the webs I decide not to so and ->tl;dr
libre Grüße,
Florian
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