docker-documentation/images/docker-tester.md

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linuxserver/tester

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This internal tool is used as a desktop sandbox in our CI process to grab a screenshot of a hopefully functional endpoint

Supported Architectures

Our images support multiple architectures such as x86-64, arm64 and armhf. We utilise the docker manifest for multi-platform awareness. More information is available from docker here and our announcement here.

Simply pulling linuxserver/tester should retrieve the correct image for your arch, but you can also pull specific arch images via tags.

The architectures supported by this image are:

Architecture Tag
x86-64 latest

Usage

Here are some example snippets to help you get started creating a container from this image.

docker

docker create \
  --name=tester \
  -e URL=http://google.com \
  -p 3000:3000 \
  --restart unless-stopped \
  linuxserver/tester

docker-compose

Compatible with docker-compose v2 schemas.

---
version: "2.1"
services:
  tester:
    image: linuxserver/tester
    container_name: tester
    environment:
      - URL=http://google.com
    ports:
      - 3000:3000
    restart: unless-stopped

Parameters

Docker images are configured using parameters passed at runtime (such as those above). These parameters are separated by a colon and indicate <external>:<internal> respectively. For example, -p 8080:80 would expose port 80 from inside the container to be accessible from the host's IP on port 8080 outside the container.

Ports (-p)

Parameter Function
3000 WebUI

Environment Variables (-e)

Env Function
URL=http://google.com Specify an endpoint, the container will automatically determine the correct protocol and program to use

Volume Mappings (-v)

Volume Function

Environment variables from files (Docker secrets)

You can set any environment variable from a file by using a special prepend FILE__.

As an example:

-e FILE__PASSWORD=/run/secrets/mysecretpassword

Will set the environment variable PASSWORD based on the contents of the /run/secrets/mysecretpassword file.

Umask for running applications

For all of our images we provide the ability to override the default umask settings for services started within the containers using the optional -e UMASK=022 setting. Keep in mind umask is not chmod it subtracts from permissions based on it's value it does not add. Please read up here before asking for support.

Docker Mods

Docker Mods

We publish various Docker Mods to enable additional functionality within the containers. The list of Mods available for this image (if any) can be accessed via the dynamic badge above.

Support Info

  • Shell access whilst the container is running:
    • docker exec -it tester /bin/bash
  • To monitor the logs of the container in realtime:
    • docker logs -f tester
  • Container version number
    • docker inspect -f '{{ index .Config.Labels "build_version" }}' tester
  • Image version number
    • docker inspect -f '{{ index .Config.Labels "build_version" }}' linuxserver/tester

Versions

  • 18.04.20: - Initial release.