switch to systemd on ubuntu phone xenial

[You-Sheng Yang]

Snappy heavily rely on systemd system session and xenial has systemd by default.

[steps to construct systemd-based avila]

1. flash images built from xenial branch [1]. This should gives a working xenial+upstart avila. Following steps are based on rootfs rev 59.

2. Go to Settings::About page to enable developer mode.

[1]: https://code.launchpad.net/~avila-private-team/avila-private/+git/platform_manifest/+ref/xenial

[Prebuilt rootfs tarball]

https://private-fileshare.canonical.com/~vicamo/avila/images/systemd/ubuntu/20161011/rootfs-systemd_rev-56.tar.bz2
md5sum: 4fc880e60fcf66857fbbeff6ce58e025
build_number: 56
version_detail: ubuntu=20161011,device=20160919.0,custom=20161011,version=56

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[You-Sheng Yang (vicamo)]

Prebuilt ubuntu-touch meta package that depends on systemd-sysv instead.

[You-Sheng Yang (vicamo)]

Append debian build version so that it doesn't confuse dpkg.

[You-Sheng Yang (vicamo)]

Differences between list of packages install upstart and/or systemd service files:

# diff -Nu /tmp/upstart-packages.list /tmp/systemd-packages.
--- /tmp/upstart-packages.list 2016-09-19 05:55:03.849426548 +0000
+++ /tmp/systemd-packages.list 2016-09-19 05:56:15.139426552 +0000
@@ -1,80 +1,40 @@
-account-polld
-address-book-service
-address-book-updater
+accountsservice
 alsa-utils
-android-tools-adbd
-apparmor
 apport
 apport-noui
-biometryd-bin
+apt
 bluetooth-touch
 bluez
-buteo-syncfw
 cgmanager
-cgroup-lite
-ciborium
 click
-console-setup
 console-setup-linux
 cron
 dbus
-gnome-keyring
-history-service
-hostname
 ifupdown
-indicator-bluetooth
-indicator-datetime
-indicator-display
-indicator-keyboard
-indicator-location
-indicator-messages
-indicator-network
-indicator-power
-indicator-session
-indicator-sound
-indicator-transfer
 keyboard-configuration
-kmod
-libertine-tools
-libunity-scopes1.0
 lightdm
 lxc1
 lxc-android-config
-media-hub
-mediascanner2.0
-mountall
-mtp-server
 network-manager
-nuntium
 ofono
-openssh-client
 openssh-server
-passwd
-pay-service
-procps
+openvpn
+packagekit
+plymouth
+policykit-1
+ppp
 repowerd
 resolvconf
-rfkill
+rsync
 rsyslog
-session-migration
-sync-monitor
-telephony-service
-tone-generator
-ubuntu-app-launch
-ubuntu-location-provider-here
-ubuntu-location-service-bin
-ubuntu-push-client
-ubuntu-touch-customization-hooks
+rtkit
+systemd
 ubuntu-touch-session
 udev
+udisks2
 ufw
-unity8
-unity-scope-click-departmentsdb
-upstart
-upstart-watchdog
+upower
 ureadahead
 urfkill
-url-dispatcher
-usensord
-util-linux
 whoopsie
+wpasupplicant

[You-Sheng Yang (vicamo)]

It seems there is no repository to land changes for ubuntu-touch-mate package, so here is the patch for manual landing.

[Ubuntu Foundations Team Bug Bot (crichton)]

The attachment "ubuntu-touch-meta.patch" seems to be a debdiff. The ubuntu-sponsors team has been subscribed to the bug report so that they can review and hopefully sponsor the debdiff. If the attachment isn't a patch, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are member of the ~ubuntu-sponsors, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issue please contact him.]

[You-Sheng Yang (vicamo)]

Prebuilt adbd package that installs systemd service and starts up at early boot stage.

[You-Sheng Yang (vicamo)]

Kernel changes in https://code.launchpad.net/~vicamo/avila/+git/kernel-3.10/+merge/306307 , maybe we need another branch for xenial+systemd?

[You-Sheng Yang (vicamo)]

Prebuilt lxc-android-config deb that contains https://code.launchpad.net/~vicamo/lxc-android-config/fix-systemd-service-startup/+merge/306435 for bug 1625916, and https://code.launchpad.net/~vicamo/lxc-android-config/systemd-writable-paths/+merge/306184 for bug 1625445.

[You-Sheng Yang (vicamo)]

Patch used to compile android-tools with systemd support. Note this is currently a dirty hack to enable adbd unconditionally at boot.

[You-Sheng Yang (vicamo)]

Prebuilt lxc-android-config that integrates https://code.launchpad.net/~vicamo/lxc-android-config/systemd-writable-paths/+merge/306184 for bug 1625445, https://code.launchpad.net/~vicamo/lxc-android-config/fix-systemd-service-startup/+merge/306435 for bug 1625916, and https://code.launchpad.net/~vicamo/lxc-android-config/disable-systemd-alsa-restore/+merge/306587 for bug 1626012.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[You-Sheng Yang (vicamo)]

Filed bug 1627613 to track adbd stuff separately.

[Bin Li (binli)]

I tried to install the lxc-android-config, but looks there are some errors.

Preparing to unpack lxc-android-config_0.230+16.04.20160728-0ubuntu1_all.deb ...
Unpacking lxc-android-config (0.230+16.04.20160728-0ubuntu1) over (0.230+16.04.20160728-0ubuntu1) ...
dpkg: error processing archive lxc-android-config_0.230+16.04.20160728-0ubuntu1_all.deb (--install):
 unable to make backup link of './var/lib/lxc/android/pre-start.d/30-no-surface-flinger' before installing new version: Invalid cross-device link
dpkg-deb (subprocess): decompressing archive member: lzma write error: Broken pipe
dpkg-deb: error: subprocess <decompress> returned error exit status 2
Errors were encountered while processing:
 lxc-android-config_0.230+16.04.20160728-0ubuntu1_all.deb

[Łukasz Zemczak (sil2100)]

Reviewed most of the required merge requests, most of them approved out-of-the-box. The meta package changes will need to land last after everything else is in the xenial-overlay already. Will prepare a silo for the landing.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Dimitri John Ledkov (xnox)]

Moving upstart upstream task to Ubuntu(upstart), upstart-local-bridge is Ubuntu-only bridge, not present upstream.

[You-Sheng Yang (vicamo)]

There is no more work to do for systemd bring up.

For snappy bring up, bug 1632272 and bug 1633367 are still open/waiting for review.

[Alex Tu (alextu)]

hello snap works well on the latest build from xenial branch.
The prebuilt image could be found here:
http://people.canonical.com/~alextu/avila/xenial/image/m10_xenial.tar.xz
ubuntu tarball: build number 59

The steps I did:
1. flash images by flash tool[1] with "download only"
2. install snapd by apt-get
3. apply the changes of lp#1632272 and lp#1633367
4. then hello snap works
https://pastebin.canonical.com/167958/

You might need to mount root to rw in each step:
$ sudo mount -o remount,rw /

awesome!