Run completely without the need of root priviledges

[wglanzer]

Support guidelines

• I've read the support guidelines

I've found a bug and checked that ...

• ... the documentation does not mention anything about my problem
• ... there are no open or closed issues that are related to my problem

Description

I want to spin up a license server on our kubernetes cluster (and on my local minikube dev platform), without the need of running the container as root user.
All seems to work finde, until the "fixing perms..." and a permission error appeared.

Expected behaviour

I thought that it should be possible to run your container without the need of root priviledges, because the README said so.

Actual behaviour

See description for error message :D

Steps to reproduce

You should be able to reproduce this very easily by using this sample deployment:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: "ejtserver-reproducer"
  labels:
    app: "ejtserver-reproducer"
spec:
  selector:
    matchLabels:
      app: "ejtserver-reproducer"
  template:
    metadata:
      labels:
        app: "ejtserver-reproducer"
    spec:
      securityContext:
        runAsNonRoot: true
        runAsUser: 1000
        runAsGroup: 1000
      containers:
        - name: "ejtserver-reproducer"
          image: "crazymax/ejtserver:1.16.2"
          imagePullPolicy: IfNotPresent
          env:
            - name: TZ
              value: "Europe/Berlin"
          resources:
            limits:
              cpu: "100m"
              memory: 200Mi
            requests:
              cpu: "100m"
              memory: 50Mi
          ports:
            - name: license-server
              containerPort: 11862
              protocol: TCP

Docker info

Client: Docker Engine - Community
 Version:    25.0.2
 Context:    default
 Debug Mode: false

Server:
 Containers: 92
  Running: 33
  Paused: 0
  Stopped: 59
 Images: 63
 Server Version: 24.0.7
 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: 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: runc io.containerd.runc.v2
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 8e4b0bde866788eec76735cc77c4720144248fb7
 runc version: ccaecfcbc907d70a7aa870a6650887b901b25b82
 init version: de40ad0
 Security Options:
  seccomp
   Profile: builtin
 Kernel Version: 5.10.57
 Operating System: Buildroot 2021.02.12
 OSType: linux
 Architecture: x86_64
 CPUs: 6
 Total Memory: 5.789GiB
 Name: minikube
 ID: 85a2161d-8389-413c-be4a-b7201c5055e7
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Labels:
  provider=hyperkit
 Experimental: false
 Insecure Registries:
  10.96.0.0/12
  127.0.0.0/8
 Live Restore Enabled: false
 Product License: Community Engine

WARNING: No blkio throttle.read_bps_device support
WARNING: No blkio throttle.write_bps_device support
WARNING: No blkio throttle.read_iops_device support
WARNING: No blkio throttle.write_iops_device support

Docker Compose config

No response

Logs

Setting timezone to Europe/Berlin...
ln: failed to create symbolic link '/etc/localtime': Permission denied
/entrypoint.sh: line 52: /etc/timezone: Permission denied
Downloading ejtserver 1.16.2 from https://licenseserver.ej-technologies.com/ejtserver_unix_1_16_2.tar.gz...
Installing ejtserver 1.16.2...
Initializing license server...
Checking licenses...
Inserting licenses...
Configuring license server...
Setting log level of license server to INFO...
Fixing perms...
error: failed switching to "ejt:ejt": operation not permitted

Additional info

No response