how to solve ERRO[0000] error waiting for container: context canceled

Question

I am trying to test how to add user

my docker info is:

% docker info
Client:
 Context:    default
 Debug Mode: false
 Plugins:
  buildx: Docker Buildx (Docker Inc., v0.7.1)
  compose: Docker Compose (Docker Inc., v2.2.1)
  scan: Docker Scan (Docker Inc., 0.9.0)

Server:
 Containers: 94
  Running: 0
  Paused: 0
  Stopped: 94
 Images: 11
 Server Version: 20.10.11
 Storage Driver: overlay2
  Backing Filesystem: extfs
  Supports d_type: true
  Native Overlay Diff: true
  userxattr: false
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Cgroup Version: 2
 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 io.containerd.runtime.v1.linux runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 7b11cfaabd73bb80907dd23182b9347b4245eb5d
 runc version: v1.0.2-0-g52b36a2
 init version: de40ad0
 Security Options:
  seccomp
   Profile: default
  cgroupns
 Kernel Version: 5.10.76-linuxkit
 Operating System: Docker Desktop
 OSType: linux
 Architecture: aarch64
 CPUs: 4
 Total Memory: 1.942GiB
 Name: docker-desktop
 ID: BNVF:OFMF:5YJE:SAGF:CVBA:IOGG:36BQ:G63I:J6YM:KWFY:P5CL:EX3U
 Docker Root Dir: /var/lib/docker
 Debug Mode: true
  File Descriptors: 48
  Goroutines: 46
  System Time: 2022-01-16T15:49:03.553220221Z
  EventsListeners: 3
 HTTP Proxy: http.docker.internal:3128
 HTTPS Proxy: http.docker.internal:3128
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: true
 Insecure Registries:
  127.0.0.0/8
 Registry Mirrors:
  http://hub-mirror.c.163.com/
 Live Restore Enabled: false

my docker file is like:

FROM ubuntu:latest
MAINTAINER xueshan
RUN groupadd -r redis && useradd -r -g redis redis
USER redis
CMD ["redis-server"]

% docker build TEST -t testuser
[+] Building 0.1s (6/6) FINISHED                                                                                                         
 => [internal] load build definition from Dockerfile                                                                                0.0s
 => => transferring dockerfile: 163B                                                                                                0.0s
 => [internal] load .dockerignore                                                                                                   0.0s
 => => transferring context: 2B                                                                                                     0.0s
 => [internal] load metadata for docker.io/library/ubuntu:latest                                                                    0.0s
 => [1/2] FROM docker.io/library/ubuntu:latest                                                                                      0.0s
 => CACHED [2/2] RUN groupadd -r redis && useradd -r -g redis redis                                                                 0.0s
 => exporting to image                                                                                                              0.0s
 => => exporting layers                                                                                                             0.0s
 => => writing image sha256:74f15b450612cc59e37228be496e7c91f2f69b876073ec1803914932bd777eb2                                        0.0s
 => => naming to docker.io/library/testuser                                                                                         0.0s

Use 'docker scan' to run Snyk tests against images to find vulnerabilities and learn how to fix them
% docker run -it testuser
docker: Error response from daemon: OCI runtime create failed: container_linux.go:380: starting container process caused: exec: "redis-server": executable file not found in $PATH: unknown.
ERRO[0000] error waiting for container: context canceled 

from the output of buliding image, it seems that no error happened ...[?] I am wondering how to solve this problem and run docker with user redis or I have to add the path of this docker file as $path?

and I tried with docker ps

% docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES

the result seems to show that no active container ... [?]

what I expect to see is that after successfully building the image, if I run it with docker run -it 'image', the user at the terminal should change to redis.

2021/1/20 1st Update

2021/1/20 2nd Update

2021/1/20 3rd Update

2021/1/20 4th Update. this is what I expect to see

reference:

https://dockerlabs.collabnix.com/beginners/dockerfile/user.html https://programming.vip/docs/detailed-explanation-of-docker-dockerfile-instructions-and-practical-cases.html

Answer 1

Your problem isn't with adding the user. The problem is:

starting container process caused: exec: "redis-server": executable file not found in $PATH: unknown.

Meaning redis-server isn't in your $PATH

According to your Dockerfile you didn't install redis.

Try this Dockerfile:

FROM ubuntu:latest
MAINTAINER xueshan
RUN apt update && \
    apt install -y –no-install-recommends redis && \
    rm -rf /var/lib/apt/lists/*
RUN groupadd -r redis && useradd -r -g redis redis
USER redis
CMD ["redis-server"]