OpenEmbedded/Yocto layer for Ubuntu Snappy support
This meta layer adds support for Ubuntu Snappy for all OpenEmbedded/Yocto based devices.
This meta layer mainly contains the following components which are required for Snappy:
The layer currently supports Yocto 2.4.x Rocko release.
Aside from OE-core,
meta-snappy also depends on
Follow the Yocto Quickstart guide to get your build host properly setup: https://www.yoctoproject.org/docs/latest/yocto-project-qs/yocto-project-qs.html
Download latest yocto release
$ git clone git://git.yoctoproject.org/poky $ cd poky $ git checkout rocko
- Fetch meta-openembedded layer:
$ git clone git://git.openembedded.org/meta-openembedded $ cd meta-openembedded $ git checkout rocko
- Fetch meta-snappy layer
$ git clone https://github.com/morphis/meta-snappy.git
- Prepare the build environment
$ source oe-init-build-env
Now add meta-snappy to your conf/bblayers.conf so that it looks similar to this
BBLAYERS ?= " \ ... /tmp/poky/meta-snappy \ /tmp/meta-openembedded/meta-oe \ /tmp/meta-openembedded/meta-filesystems \ "
- Modify your conf/local.conf
Enable support for systemd which is mandatory for snapd. See https://www.yoctoproject.org/docs/latest/dev-manual/dev-manual.html#using-systemd-exclusively for more details.
cat<<EOF >> conf/local.conf DISTRO_FEATURES_append = " systemd" VIRTUAL-RUNTIME_init_manager = "systemd" DISTRO_FEATURES_BACKFILL_CONSIDERED = "sysvinit" VIRTUAL-RUNTIME_initscripts = "" EOF
snap-confine tool assumes that the home directory of
Make sure we do not break this assumption, otherwise snaps mount namespace
setup will fail early in the process. To use
cat <<EOF >> conf/local.conf ROOT_HOME = "/root" EOF
(Optional) The build can take up a huge amount of disk space, inheriting
rm_work class will help deal with that (see
INHERIT += "rm_work" # exclude snapd in case you want to develop snapd recipes RM_WORK_EXCLUDE += "snapd"
- Finally you can now build the Snappy demo image via
$ bitbake snapd-demo-image
Depending on your host system the build will take a while.
IMAGE_ROOTFS_SIZE ?= "819200", this the resulting
image is > 800MB in size. When building custom images make sure to add room for
storing snaps by either setting
IMAGE_ROOTFS_EXTRA_SPACE or tuning
- Once the build is done you can boot the image with QEMU with the following command:
$ runqemu qemux86
- When the system has fully booted login with root and no password. Afterwards you can use the the snap system as normal.
$ snap install hello-world $ /snap/bin/hello-world.shell # path to /snap/bin is automatically addded to user's environment $ hello-world
Contributions & support
Please submit any issues or pull requests on out github project at http://github.com/morphis/meta-snappy
Head out to https://forum.snapcraft.io/ for support and questions about snapd.