I am trying to run sysbox inside a physical device.
It has kernel 6.1.107
which was compiled by me.
I’ve added all the necessary kernel modules in the kernel’s x86_64-all.config
.
iptables/nf/netfilter
bridge
bpf
fuse/cuse/virtio
user ns
...
I’ve changed the /etc/docker/daemon.json
so the data-root
is on a mounted disk - not the initrd
file system (docker
yells about it). Afterwards, docker
works fine (running docker run --rm -it hello-world
works).
Also, I had to add Environment="DOCKER_RAMDISK=true"
to docker’s systemd
file:
# /etc/systemd/system/docker.service.d/override.conf
[Service]
Environment="DOCKER_RAMDISK=true"
Afterwards I’ve tried to install sysbox
properly according to this site’s installation guide (installing the .deb
).
Same as docker
, I’ve changed /lib/systemd/system/sysbox-mgr.service
to have a --data-root
on the mounted disk.
Also /lib/systemd/system/sysbox-fs.service
with --mountpoint
.
Then, when trying to run: docker run --rm -it --runtime=sysbox-runc hello-world
I get:
docker: Error response from daemon: failed to create task for container: failed to create shim task: OCI runtime create failed: container_linux.go:439: starting container process caused: process_linux.go:608: container init caused: rootfs_linux.go:119: jailing process inside rootfs caused: permission denied: unknown
Please let me know - is there a missing kernel
module? Do I miss some configuration?
Thanks.
~# sysbox-mgr --version
sysbox-mgr
edition: Community Edition (CE)
version: 0.6.7
commit: aaeff6c5dc70c137e62166474a309ca5fc42d044
built at: Fri May 9 21:15:06 UTC 2025
built by: Cesar Talledo
~# docker --version
Docker version 28.3.0, build 38b7060
~# cat /etc/docker/daemon.json
{
"data-root": "/mnt/mymount/var/lib/docker",
"runtimes": {
"sysbox-runc": {
"path": "/usr/bin/sysbox-runc"
}
},
"bip": "172.20.0.1/16",
"default-address-pools": [
{
"base": "172.25.0.0/16",
"size": 24
}
]
}
~# cat /lib/systemd/system/sysbox-mgr.service
...
ExecStart=/usr/bin/sysbox-mgr --data-root /mnt/mymount/var/lib/sysbox
...
~# cat /lib/systemd/system/sysbox-fs.service
...
ExecStart=/usr/bin/sysbox-fs --mountpoint /mnt/mymount/var/lib/sysboxfs
...
~# docker info
Client: Docker Engine - Community
Version: 28.3.0
Context: default
Debug Mode: false
Plugins:
buildx: Docker Buildx (Docker Inc.)
Version: v0.25.0
Path: /usr/libexec/docker/cli-plugins/docker-buildx
compose: Docker Compose (Docker Inc.)
Version: v2.37.3
Path: /usr/libexec/docker/cli-plugins/docker-compose
Server:
Containers: 0
Running: 0
Paused: 0
Stopped: 0
Images: 1
Server Version: 28.3.0
Storage Driver: overlay2
Backing Filesystem: extfs
Supports d_type: true
Using metacopy: false
Native Overlay Diff: true
userxattr: false
Logging Driver: json-file
Cgroup Driver: systemd
Cgroup Version: 2
Plugins:
Volume: local
Network: bridge host ipvlan macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local splunk syslog
CDI spec directories:
/etc/cdi
/var/run/cdi
Swarm: inactive
Runtimes: io.containerd.runc.v2 runc sysbox-runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 05044ec0a9a75232cad458027ca83437aae3f4da
runc version: v1.2.5-0-g59923ef
init version: de40ad0
Security Options:
seccomp
Profile: builtin
cgroupns
Kernel Version: 6.1.107
Operating System: Ubuntu 22.04.1 LTS
OSType: linux
Architecture: x86_64
CPUs: 8
Total Memory: 13.32GiB
Name: localhost.localdomain
ID: f3a21194-c6a0-2224-b55d-29e9eee64f32
Docker Root Dir: /mnt/mymount/var/lib/docker
Debug Mode: false
Experimental: false
Insecure Registries:
::1/128
127.0.0.0/8
Live Restore Enabled: false
Default Address Pools:
Base: 172.25.0.0/16, Size: 24
WARNING: No io.weight support
WARNING: No io.weight (per device) support
WARNING: No io.max (rbps) support
WARNING: No io.max (wbps) support
WARNING: No io.max (riops) support
WARNING: No io.max (wiops) support