docker / cgroups v1 / fakeroot

$ docker version
Client:
 Version:           23.0.3
 API version:       1.42
 Go version:        go1.20.2
 Git commit:        3e7cbfdee1
 Built:             Wed Apr  5 13:17:36 2023
 OS/Arch:           linux/amd64
 Context:           default

Server:
 Engine:
  Version:          23.0.3
  API version:      1.42 (minimum version 1.12)
  Go version:       go1.20.2
  Git commit:       59118bff50
  Built:            Wed Apr  5 13:17:36 2023
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          v1.7.0
  GitCommit:        1fbd70374134b891f97ce19c70b6e50c7b9f4e0d.m
 runc:
  Version:          1.1.6
  GitCommit:
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

$ docker info
Client:
 Context:    default
 Debug Mode: false
 Plugins:
  compose: Docker Compose (Docker Inc.)
    Version:  2.17.2
    Path:     /usr/lib/docker/cli-plugins/docker-compose

Server:
 Containers: 151
  Running: 1
  Paused: 0
  Stopped: 150
 Images: 506
 Server Version: 23.0.3
 Storage Driver: overlay2
  Backing Filesystem: extfs
  Supports d_type: true
  Using metacopy: true
  Native Overlay Diff: false
  userxattr: false
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Cgroup Version: 1
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 1fbd70374134b891f97ce19c70b6e50c7b9f4e0d.m
 runc version:
 init version: de40ad0
 Security Options:
  seccomp
   Profile: builtin
 Kernel Version: 6.2.11-arch1-1
 Operating System: Arch Linux
 OSType: linux
 Architecture: x86_64
 CPUs: 24
 Total Memory: 31.27GiB
 Name: mocull-endeavor
 ID: VUDR:URXR:LNY6:5ANR:5F5U:I7ET:POWR:IZTF:YJML:HL25:GTTI:TAQZ
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Registry: https://index.docker.io/v1/
 Experimental: false
 Insecure Registries:
  registry.batswireless.lcl:5001
  127.0.0.0/8
 Live Restore Enabled: false

$ docker run --rm -it alpine sh
/ # apk update
/ # apk add fakeroot
/ # time fakeroot whoami
root
real    0m 0.00s
user    0m 0.00s
sys     0m 0.00s
/ # time fakeroot sh -c whoami
fakeroot internal error #43: Identifier removed
semop(2): encountered an error: Invalid argument
sh: can't kill pid 71: No such process
Command exited with non-zero status 1
real    0m 16.51s
user    0m 0.00s
sys     0m 0.00s
/ # time fakeroot sh -c whoami
root
real    1m 46.91s
user    0m 0.00s
sys     0m 0.00s
/ # fakeroot -v
fakeroot version 1.29