docker-documentation/images/docker-tester.md

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---
title: tester
---
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<!-- DO NOT EDIT THIS FILE MANUALLY -->
<!-- Please read the https://github.com/linuxserver/docker-tester/blob/master/.github/CONTRIBUTING.md -->
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# [linuxserver/tester](https://github.com/linuxserver/docker-tester)
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[![Scarf.io pulls](https://scarf.sh/installs-badge/linuxserver-ci/linuxserver%2Ftester?color=94398d&label-color=555555&logo-color=ffffff&style=for-the-badge&package-type=docker)](https://scarf.sh/gateway/linuxserver-ci/docker/linuxserver%2Ftester)
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[![GitHub Stars](https://img.shields.io/github/stars/linuxserver/docker-tester.svg?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&logo=github)](https://github.com/linuxserver/docker-tester)
[![GitHub Release](https://img.shields.io/github/release/linuxserver/docker-tester.svg?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&logo=github)](https://github.com/linuxserver/docker-tester/releases)
[![GitHub Package Repository](https://img.shields.io/static/v1.svg?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&label=linuxserver.io&message=GitHub%20Package&logo=github)](https://github.com/linuxserver/docker-tester/packages)
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[![GitLab Container Registry](https://img.shields.io/static/v1.svg?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&label=linuxserver.io&message=GitLab%20Registry&logo=gitlab)](https://gitlab.com/linuxserver.io/docker-tester/container_registry)
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[![Quay.io](https://img.shields.io/static/v1.svg?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&label=linuxserver.io&message=Quay.io)](https://quay.io/repository/linuxserver.io/tester)
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[![Docker Pulls](https://img.shields.io/docker/pulls/linuxserver/tester.svg?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&label=pulls&logo=docker)](https://hub.docker.com/r/linuxserver/tester)
[![Docker Stars](https://img.shields.io/docker/stars/linuxserver/tester.svg?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&label=stars&logo=docker)](https://hub.docker.com/r/linuxserver/tester)
[![Jenkins Build](https://img.shields.io/jenkins/build?labelColor=555555&logoColor=ffffff&style=for-the-badge&jobUrl=https%3A%2F%2Fci.linuxserver.io%2Fjob%2FDocker-Pipeline-Builders%2Fjob%2Fdocker-tester%2Fjob%2Fmaster%2F&logo=jenkins)](https://ci.linuxserver.io/job/Docker-Pipeline-Builders/job/docker-tester/job/master/)
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[![LSIO CI](https://img.shields.io/badge/dynamic/yaml?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&label=CI&query=CI&url=https%3A%2F%2Fci-tests.linuxserver.io%2Flinuxserver%2Ftester%2Flatest%2Fci-status.yml)](https://ci-tests.linuxserver.io/linuxserver/tester/latest/index.html)
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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
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## Supported Architectures
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We utilise the docker manifest for multi-platform awareness. More information is available from docker [here](https://github.com/docker/distribution/blob/master/docs/spec/manifest-v2-2.md#manifest-list) and our announcement [here](https://blog.linuxserver.io/2019/02/21/the-lsio-pipeline-project/).
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Simply pulling `lscr.io/linuxserver/tester:latest` should retrieve the correct image for your arch, but you can also pull specific arch images via tags.
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The architectures supported by this image are:
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| Architecture | Available | Tag |
| :----: | :----: | ---- |
| x86-64 | ✅ | amd64-\<version tag\> |
| arm64 | ❌ | |
| armhf| ❌ | |
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## Usage
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To help you get started creating a container from this image you can either use docker-compose or the docker cli.
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### docker-compose (recommended, [click here for more info](https://docs.linuxserver.io/general/docker-compose))
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```yaml
---
version: "2.1"
services:
tester:
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image: lscr.io/linuxserver/tester:latest
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container_name: tester
environment:
- URL=http://google.com
ports:
- 3000:3000
restart: unless-stopped
```
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### docker cli ([click here for more info](https://docs.docker.com/engine/reference/commandline/cli/))
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```bash
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docker run -d \
--name=tester \
-e URL=http://google.com \
-p 3000:3000 \
--restart unless-stopped \
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lscr.io/linuxserver/tester:latest
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```
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## 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 |
| :----: | --- |
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#### Miscellaneous Options
| Parameter | Function |
| :-----: | --- |
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## Environment variables from files (Docker secrets)
You can set any environment variable from a file by using a special prepend `FILE__`.
As an example:
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```bash
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-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](https://en.wikipedia.org/wiki/Umask) before asking for support.
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## Docker Mods
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[![Docker Mods](https://img.shields.io/badge/dynamic/yaml?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&label=tester&query=%24.mods%5B%27tester%27%5D.mod_count&url=https%3A%2F%2Fraw.githubusercontent.com%2Flinuxserver%2Fdocker-mods%2Fmaster%2Fmod-list.yml)](https://mods.linuxserver.io/?mod=tester "view available mods for this container.") [![Docker Universal Mods](https://img.shields.io/badge/dynamic/yaml?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&label=universal&query=%24.mods%5B%27universal%27%5D.mod_count&url=https%3A%2F%2Fraw.githubusercontent.com%2Flinuxserver%2Fdocker-mods%2Fmaster%2Fmod-list.yml)](https://mods.linuxserver.io/?mod=universal "view available universal mods.")
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We publish various [Docker Mods](https://github.com/linuxserver/docker-mods) to enable additional functionality within the containers. The list of Mods available for this image (if any) as well as universal mods that can be applied to any one of our images can be accessed via the dynamic badges above.
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## 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
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* `docker inspect -f '{{ index .Config.Labels "build_version" }}' lscr.io/linuxserver/tester:latest`
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## Versions
* **18.04.20:** - Initial release.