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1a87aca209
Extends container-base to create a systemd enabled container that is
an appropriate starting point if a systemd applciation is being run
or a mulit-user style environment is required.
The application specified in SYSTEMD_CONTAINER_APP will be installed
and be available to be executed.
The rootfs of this container type is post processed to enable and
disable services as specified by the containeer definition. This allows
service that are not appropriate in a containerized environemnt to
be disabled (i.e. getty login)
The list of services can be found in the recipes themselves.
This container enables ssh by default, so that it can be executed
in the background and then accessed as a full environment.
Note: this is currently a priviledged container if run under docker.
There are multiple ways to add/remove permissions from the container,
and most are configurable during launch:
% root@qemuarm64-54:~# docker run -d --rm --name systemd_test --privileged --cap-add SYS_ADMIN \
--security-opt seccomp=unconfined --cgroup-parent=docker.slice --cgroupns private \
--tmpfs /tmp --tmpfs /run --tmpfs /run/lock zeddii/systemd-container-base
or
% docker run -d --rm --name systemd_test --privileged --cgroup-parent=docker.slice \
--cgroupns private zeddii/c3-systemd-container
% root@qemuarm64-54:~# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
4b07cc907e26 zeddii/c3-systemd-container "/sbin/init" 5 minutes ago Up 5 minutes systemd_test
% podman run -d --name systemd_test --privileged --cgroupns=host --tmpfs /tmp --tmpfs /run --tmpfs /run/lock \
-v /sys/fs/cgroup:/sys/fs/cgroup:ro zeddii/systemd-container-base
% ctr container create --privileged --runtime="io.containerd.runc.v2" \
--mount type=bind,src=/sys/fs/cgroup,dst=/sys/fs/cgroup,options=rbind:rw \
docker.io/zeddii/systemd-container-base:latest my_systemd_container /sbin/init
% ctr task start --detach my_systemd_container
% ctr task ls
TASK PID STATUS
my_systemd_container 690 RUNNING
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
73 lines
2.2 KiB
PHP
73 lines
2.2 KiB
PHP
SUMMARY ?= "Sample systemd system container"
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DESCRIPTION ?= "A small systemd system container which will run \
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the application defined in IMAGE_INSTALL."
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LICENSE ?= "MIT"
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LIC_FILES_CHKSUM ?= "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"
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# Some commands of interest:
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# % docker run -d --rm --name systemd_test --privileged \
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# --cap-add SYS_ADMIN --security-opt seccomp=unconfined --cgroup-parent=docker.slice \
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# --cgroupns private --tmpfs /tmp --tmpfs /run --tmpfs /run/lock zeddii/systemd-container-base
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#
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# % docker run -d --rm --name systemd_test --privileged \
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# --cgroup-parent=docker.slice --cgroupns private zeddii/c3-systemd-container
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#
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# % docker inspect systemd_test
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# % docker inspect systemd_test | grep \"IPAddress\":
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# % docker exec systemd_test bash -c "echo 'testuser:password' | chpasswd"
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# % ssh testuser@172.17.0.2
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require container-base.bb
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OCI_IMAGE_ENTRYPOINT = "/sbin/init"
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IMAGE_INSTALL:append = " systemd"
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IMAGE_INSTALL:append = " packagegroup-core-base-utils"
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IMAGE_INSTALL:append = " packagegroup-core-ssh-openssh"
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IMAGE_INSTALL:append = " busybox"
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IMAGE_FEATURES ?= ""
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NO_RECOMMENDATIONS = "1"
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SERVICES_TO_DISABLE ?= " \
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systemd-udevd.service \
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systemd-udevd-control.socket \
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systemd-udevd-kernel.socket \
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proc-sys-fs-binfmt_misc.automount \
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sys-fs-fuse-connections.mount \
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sys-kernel-debug.mount \
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systemd-hwdb-update.service \
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serial-getty@ttyS0.service \
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dev-ttyS0.device \
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console-getty.service \
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serial-getty@.service \
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"
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SERVICES_TO_ENABLE ?= ""
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disable_systemd_services () {
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SERVICES_TO_DISABLE="${SERVICES_TO_DISABLE}"
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if [ -n "$SERVICES_TO_DISABLE" ]; then
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echo "Disabling systemd services:"
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for service in $SERVICES_TO_DISABLE; do
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echo " $service"
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systemctl --root="${IMAGE_ROOTFS}" mask $service > /dev/null >1
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done
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fi
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}
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enable_systemd_services () {
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SERVICES_TO_ENABLE="${SERVICES_TO_ENABLE}"
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if [ -n "$SERVICES_TO_ENABLE" ]; then
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echo "Enabling additional systemd services:"
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for service in $SERVICES_TO_ENABLE; do
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echo " $service"
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systemctl --root="${IMAGE_ROOTFS}" enable $service > /dev/null >1
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done
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fi
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}
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ROOTFS_POSTPROCESS_COMMAND += "disable_systemd_services; enable_systemd_services;"
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