# Running Playwright in Docker

[Dockerfile.bionic](Dockerfile.bionic) is a playwright-ready image of playwright.
This image includes all the dependencies needed to run browsers in a Docker
container, including browsers.

<!-- GEN:toc -->
- [Usage](#usage)
  * [Pull the image](#pull-the-image)
  * [Run the image](#run-the-image)
  * [Using on CI](#using-on-ci)
- [Development](#development)
  * [Build the image](#build-the-image)
  * [Push](#push)
- [Base images](#base-images)
  * [Alpine](#alpine)
<!-- GEN:stop -->

## Usage

[![docker hub](https://img.shields.io/badge/docker-mcr.microsoft.com%2Fplaywright-blue)](https://hub.docker.com/_/microsoft-playwright)

This image is published on [Docker Hub](https://hub.docker.com/_/microsoft-playwright).

### Pull the image

```
$ docker pull mcr.microsoft.com/playwright:bionic
```

### Run the image

```
$ docker container run -it --rm --ipc=host --security-opt seccomp=seccomp_profile.json mcr.microsoft.com/playwright:bionic /bin/bash
```

[`seccomp_profile.json`](seccomp_profile.json) is needed to run Chromium with sandbox. This is
a [default Docker seccomp profile](https://github.com/docker/engine/blob/d0d99b04cf6e00ed3fc27e81fc3d94e7eda70af3/profiles/seccomp/default.json) with extra user namespace cloning permissions:

```json
[
  {
    "comment": "Allow create user namespaces",
    "names": [
      "clone",
      "setns",
      "unshare"
    ],
    "action": "SCMP_ACT_ALLOW",
    "args": [],
    "includes": {},
    "excludes": {}
  }
]
```

> **NOTE**: Using `--ipc=host` is recommended when using Chrome ([Docker docs](https://docs.docker.com/engine/reference/run/#ipc-settings---ipc)). Chrome can run out of memory without this flag.

### Using on CI

See our [Continuous Integration guides](../ci.md) for sample configs.

## Development

### Build the image

Use [`//docs/docker/build.sh`](build.sh) to build the image.

```
$ ./docs/docker/build.sh
```

The image will be tagged as `playwright:localbuild` and could be run as:

```
$ docker run --rm -it playwright:localbuild /bin/bash
```

> **NOTE**: any commit that changes docker image should also update [`//docs/docker/CURRENT_DOCKER_IMAGE_SIZE`](CURRENT_DOCKER_IMAGE_SIZE). Please run [`//docs/docker/docker-image-size.sh`](docker-image-size.sh) locally and commit updated number.

### Push

Docker images are published automatically by Github Actions. We currently publish the following
images:
- `mcr.microsoft.com/playwright:dev` - tip-of-tree image version.
- `mcr.microsoft.com/playwright:bionic` - last Playwright release docker image.
- `mcr.microsoft.com/playwright:sha-XXXXXXX` - docker image for every commit that changed
  docker files or browsers, marked with a [short sha](https://git-scm.com/book/en/v2/Git-Tools-Revision-Selection#Short-SHA-1) (first 7 digits of the SHA commit).


## Base images

`playwright:bionic` is based on Ubuntu 18.04 LTS (Bionic Beaver).

### Alpine

Browser builds for Firefox and WebKit are built for the [glibc](https://en.wikipedia.org/wiki/GNU_C_Library) library. Alpine Linux and other distributions that are based on the [musl](https://en.wikipedia.org/wiki/Musl) standard library are not supported.
