Kata Containers snap image
- Initial setup
- Install snap
- Build and install snap image
- Configure Kata Containers
- Integration with docker and kubernetes
This directory contains the resources needed to build the Kata Containers snap image.
$ sudo apt-get install -y snapd snapcraft
You can install Kata Containers from the snapcraft store or by running the following command:
$ sudo snap install kata-containers
Build and install snap image
Run next command at the root directory of the packaging repository.
$ make snap
To install the resulting snap image, snap must be put in classic mode and the security confinement must be disabled (--classic). Also since the resulting snap has not been signed the verification of signature must be omitted (--dangerous).
$ sudo snap install --classic --dangerous kata-containers_[VERSION]_[ARCH].snap
VERSION with the current version of Kata Containers and
the system architecture.
Configure Kata Containers
By default Kata Containers snap image is mounted at
/snap/kata-containers as a
read-only file system, therefore default configuration file can not be edited.
Fortunately kata-runtime supports loading a configuration file from another
path than the default.
$ sudo mkdir -p /etc/kata-containers $ sudo cp /snap/kata-containers/current/usr/share/defaults/kata-containers/configuration.toml /etc/kata-containers/ $ $EDITOR /etc/kata-containers/configuration.toml
Integration with docker and kubernetes
The miniOS image is not included in the snap image as it is not possible for QEMU to open a guest RAM backing store on a read-only filesystem. Fortunately, you can start Kata Containers with a Linux initial RAM disk (initrd) that is included in the snap image. If you want to use the miniOS image instead of initrd, then a new configuration file can be created and configured.