mirror of
https://github.com/microsoft/playwright.git
synced 2025-06-26 21:40:17 +00:00
fix(docs): add back troubleshooting.md (#605)
This is mostly copied from Puppeteer's troubleshooting.md, with everything under a Chromium header and a few tweaks to make things make sense for Playwright. We can add other browsers to this document once we figure out how to troubleshoot them. Fixes #583
This commit is contained in:
Joel Einbinder
Andrey Lushnikov
parent
866c60254b
commit
3b2993ffe9
293
docs/troubleshooting.md
Normal file
293
docs/troubleshooting.md
Normal file
@ -0,0 +1,293 @@
|
||||
# Troubleshooting
|
||||
|
||||
<!-- GEN:toc -->
|
||||
- [Chromium](#chromium)
|
||||
* [Chrome headless doesn't launch on Windows](#chrome-headless-doesnt-launch-on-windows)
|
||||
* [Chrome headless doesn't launch on Linux/WSL](#chrome-headless-doesnt-launch-on-linuxwsl)
|
||||
* [Setting Up Chrome Linux Sandbox](#setting-up-chrome-linux-sandbox)
|
||||
- [[recommended] Enable user namespace cloning](#recommended-enable-user-namespace-cloning)
|
||||
- [[alternative] Setup setuid sandbox](#alternative-setup-setuid-sandbox)
|
||||
* [Running Playwright on Travis CI](#running-playwright-on-travis-ci)
|
||||
* [Running Playwright on CircleCI](#running-playwright-on-circleci)
|
||||
* [Running Playwright in Docker](#running-playwright-in-docker)
|
||||
- [Tips](#tips)
|
||||
- [Code Transpilation Issues](#code-transpilation-issues)
|
||||
<!-- GEN:stop -->
|
||||
## Chromium
|
||||
|
||||
### Chrome headless doesn't launch on Windows
|
||||
|
||||
Some [chrome policies](https://support.google.com/chrome/a/answer/7532015?hl=en) might enforce running Chrome/Chromium
|
||||
with certain extensions.
|
||||
|
||||
Playwright passes `--disable-extensions` flag by default and will fail to launch when such policies are active.
|
||||
|
||||
To work around this, try running without the flag:
|
||||
|
||||
```js
|
||||
const browser = await playwright.chromium.launch({
|
||||
ignoreDefaultArgs: ['--disable-extensions'],
|
||||
});
|
||||
```
|
||||
|
||||
> Context: [Puppetteer#3681](https://github.com/puppeteer/puppeteer/issues/3681#issuecomment-447865342).
|
||||
|
||||
### Chrome headless doesn't launch on Linux/WSL
|
||||
|
||||
Make sure all the necessary dependencies are installed. You can run `ldd chrome | grep not` on a Linux
|
||||
machine to check which dependencies are missing. The common ones are provided below.
|
||||
|
||||
<details>
|
||||
<summary>Debian (e.g. Ubuntu) Dependencies</summary>
|
||||
|
||||
```
|
||||
gconf-service
|
||||
libasound2
|
||||
libatk1.0-0
|
||||
libatk-bridge2.0-0
|
||||
libc6
|
||||
libcairo2
|
||||
libcups2
|
||||
libdbus-1-3
|
||||
libexpat1
|
||||
libfontconfig1
|
||||
libgcc1
|
||||
libgconf-2-4
|
||||
libgdk-pixbuf2.0-0
|
||||
libglib2.0-0
|
||||
libgtk-3-0
|
||||
libnspr4
|
||||
libpango-1.0-0
|
||||
libpangocairo-1.0-0
|
||||
libstdc++6
|
||||
libx11-6
|
||||
libx11-xcb1
|
||||
libxcb1
|
||||
libxcomposite1
|
||||
libxcursor1
|
||||
libxdamage1
|
||||
libxext6
|
||||
libxfixes3
|
||||
libxi6
|
||||
libxrandr2
|
||||
libxrender1
|
||||
libxss1
|
||||
libxtst6
|
||||
ca-certificates
|
||||
fonts-liberation
|
||||
libappindicator1
|
||||
libnss3
|
||||
lsb-release
|
||||
xdg-utils
|
||||
wget
|
||||
```
|
||||
</details>
|
||||
|
||||
<details>
|
||||
<summary>CentOS Dependencies</summary>
|
||||
|
||||
```
|
||||
pango.x86_64
|
||||
libXcomposite.x86_64
|
||||
libXcursor.x86_64
|
||||
libXdamage.x86_64
|
||||
libXext.x86_64
|
||||
libXi.x86_64
|
||||
libXtst.x86_64
|
||||
cups-libs.x86_64
|
||||
libXScrnSaver.x86_64
|
||||
libXrandr.x86_64
|
||||
GConf2.x86_64
|
||||
alsa-lib.x86_64
|
||||
atk.x86_64
|
||||
gtk3.x86_64
|
||||
ipa-gothic-fonts
|
||||
xorg-x11-fonts-100dpi
|
||||
xorg-x11-fonts-75dpi
|
||||
xorg-x11-utils
|
||||
xorg-x11-fonts-cyrillic
|
||||
xorg-x11-fonts-Type1
|
||||
xorg-x11-fonts-misc
|
||||
```
|
||||
|
||||
After installing dependencies you need to update nss library using this command
|
||||
|
||||
```
|
||||
yum update nss -y
|
||||
```
|
||||
</details>
|
||||
|
||||
<details>
|
||||
<summary>Check out discussions</summary>
|
||||
|
||||
- [Puppeteer#290](https://github.com/puppeteer/puppeteer/issues/290) - Debian troubleshooting <br/>
|
||||
- [Puppeteer#391](https://github.com/puppeteer/puppeteer/issues/391) - CentOS troubleshooting <br/>
|
||||
- [Puppeteer#379](https://github.com/puppeteer/puppeteer/issues/379) - Alpine troubleshooting <br/>
|
||||
</details>
|
||||
|
||||
Please file new issues in this repo for things relating to Playwright.
|
||||
|
||||
### Setting Up Chrome Linux Sandbox
|
||||
|
||||
In order to protect the host environment from untrusted web content, Chrome uses [multiple layers of sandboxing](https://chromium.googlesource.com/chromium/src/+/HEAD/docs/linux_sandboxing.md). For this to work properly,
|
||||
the host should be configured first. If there's no good sandbox for Chrome to use, it will crash
|
||||
with the error `No usable sandbox!`.
|
||||
|
||||
If you **absolutely trust** the content you open in Chrome, you can launch Chrome
|
||||
with the `--no-sandbox` argument:
|
||||
|
||||
```js
|
||||
const browser = await playwright.chromium.launch({args: ['--no-sandbox', '--disable-setuid-sandbox']});
|
||||
```
|
||||
|
||||
> **NOTE**: Running without a sandbox is **strongly discouraged**. Consider configuring a sandbox instead.
|
||||
|
||||
There are 2 ways to configure a sandbox in Chromium.
|
||||
|
||||
#### [recommended] Enable [user namespace cloning](http://man7.org/linux/man-pages/man7/user_namespaces.7.html)
|
||||
|
||||
User namespace cloning is only supported by modern kernels. Unprivileged user namespaces are generally fine to enable,
|
||||
but in some cases they open up more kernel attack surface for (unsandboxed) non-root processes to elevate to
|
||||
kernel privileges.
|
||||
|
||||
```bash
|
||||
sudo sysctl -w kernel.unprivileged_userns_clone=1
|
||||
```
|
||||
|
||||
#### [alternative] Setup [setuid sandbox](https://chromium.googlesource.com/chromium/src/+/HEAD/docs/linux_suid_sandbox_development.md)
|
||||
|
||||
The setuid sandbox comes as a standalone executable and is located next to the Chromium that Playwright downloads. It is
|
||||
fine to re-use the same sandbox executable for different Chromium versions, so the following could be
|
||||
done only once per host environment:
|
||||
|
||||
```bash
|
||||
# cd to the downloaded instance
|
||||
cd <project-dir-path>/node_modules/playwright/.local-chromium/linux-<revision>/chrome-linux/
|
||||
sudo chown root:root chrome_sandbox
|
||||
sudo chmod 4755 chrome_sandbox
|
||||
# copy sandbox executable to a shared location
|
||||
sudo cp -p chrome_sandbox /usr/local/sbin/chrome-devel-sandbox
|
||||
# export CHROME_DEVEL_SANDBOX env variable
|
||||
export CHROME_DEVEL_SANDBOX=/usr/local/sbin/chrome-devel-sandbox
|
||||
```
|
||||
|
||||
You might want to export the `CHROME_DEVEL_SANDBOX` env variable by default. In this case, add the following to the `~/.bashrc`
|
||||
or `.zshenv`:
|
||||
|
||||
```bash
|
||||
export CHROME_DEVEL_SANDBOX=/usr/local/sbin/chrome-devel-sandbox
|
||||
```
|
||||
|
||||
|
||||
### Running Playwright on Travis CI
|
||||
|
||||
> 👋 We run our tests for Playwright on Travis CI - see our [`.travis.yml`](https://github.com/microsoft/playwright/blob/master/.travis.yml) for reference.
|
||||
|
||||
Tips-n-tricks:
|
||||
- The `libnss3` package must be installed in order to run Chromium on Ubuntu Trusty
|
||||
- [user namespace cloning](http://man7.org/linux/man-pages/man7/user_namespaces.7.html) should be enabled to support
|
||||
proper sandboxing
|
||||
- [xvfb](https://en.wikipedia.org/wiki/Xvfb) should be launched in order to run Chromium in non-headless mode (e.g. to test Chrome Extensions)
|
||||
|
||||
To sum up, your `.travis.yml` might look like this:
|
||||
|
||||
```yml
|
||||
language: node_js
|
||||
dist: trusty
|
||||
addons:
|
||||
apt:
|
||||
packages:
|
||||
# This is required to run new chrome on old trusty
|
||||
- libnss3
|
||||
notifications:
|
||||
email: false
|
||||
cache:
|
||||
directories:
|
||||
- node_modules
|
||||
# allow headful tests
|
||||
before_install:
|
||||
# Enable user namespace cloning
|
||||
- "sysctl kernel.unprivileged_userns_clone=1"
|
||||
# Launch XVFB
|
||||
- "export DISPLAY=:99.0"
|
||||
- "sh -e /etc/init.d/xvfb start"
|
||||
```
|
||||
|
||||
### Running Playwright on CircleCI
|
||||
|
||||
Running Playwright smoothly on CircleCI requires the following steps:
|
||||
|
||||
1. Start with a [NodeJS
|
||||
image](https://circleci.com/docs/2.0/circleci-images/#nodejs) in your config
|
||||
like so:
|
||||
```yaml
|
||||
docker:
|
||||
- image: circleci/node:12 # Use your desired version
|
||||
environment:
|
||||
NODE_ENV: development # Only needed if playwright is in `devDependencies`
|
||||
```
|
||||
1. Dependencies like `libXtst6` probably need to be installed via `apt-get`,
|
||||
so use the
|
||||
[threetreeslight/puppeteer](https://circleci.com/orbs/registry/orb/threetreeslight/puppeteer)
|
||||
orb
|
||||
([instructions](https://circleci.com/orbs/registry/orb/threetreeslight/puppeteer#quick-start)),
|
||||
or paste parts of its
|
||||
[source](https://circleci.com/orbs/registry/orb/threetreeslight/puppeteer#orb-source)
|
||||
into your own config.
|
||||
1. Lastly, if you’re using Playwright through Jest, then you may encounter an
|
||||
error spawning child processes:
|
||||
```
|
||||
[00:00.0] jest args: --e2e --spec --max-workers=36
|
||||
Error: spawn ENOMEM
|
||||
at ChildProcess.spawn (internal/child_process.js:394:11)
|
||||
```
|
||||
This is likely caused by Jest autodetecting the number of processes on the
|
||||
entire machine (`36`) rather than the number allowed to your container
|
||||
(`2`). To fix this, set `jest --maxWorkers=2` in your test command.
|
||||
|
||||
### Running Playwright in Docker
|
||||
|
||||
> 👋 We run our tests for Playwright in a Docker container - see our [`Dockerfile.linux`](https://github.com/microsoft/playwright/blob/master/.ci/node10/Dockerfile.linux) for reference.
|
||||
|
||||
|
||||
#### Tips
|
||||
|
||||
By default, Docker runs a container with a `/dev/shm` shared memory space 64MB.
|
||||
This is [typically too small](https://github.com/c0b/chrome-in-docker/issues/1) for Chrome
|
||||
and will cause Chrome to crash when rendering large pages. To fix, run the container with
|
||||
`docker run --shm-size=1gb` to increase the size of `/dev/shm`. Since Chrome 65, this is no
|
||||
longer necessary. Instead, launch the browser with the `--disable-dev-shm-usage` flag:
|
||||
|
||||
```js
|
||||
const browser = await playwright.chromium.launch({
|
||||
args: ['--disable-dev-shm-usage']
|
||||
});
|
||||
```
|
||||
|
||||
This will write shared memory files into `/tmp` instead of `/dev/shm`. See [crbug.com/736452](https://bugs.chromium.org/p/chromium/issues/detail?id=736452) for more details.
|
||||
|
||||
Seeing other weird errors when launching Chrome? Try running your container
|
||||
with `docker run --cap-add=SYS_ADMIN` when developing locally. Since the Dockerfile
|
||||
adds a `pptr` user as a non-privileged user, it may not have all the necessary privileges.
|
||||
|
||||
[dumb-init](https://github.com/Yelp/dumb-init) is worth checking out if you're
|
||||
experiencing a lot of zombies Chrome processes sticking around. There's special
|
||||
treatment for processes with PID=1, which makes it hard to terminate Chrome
|
||||
properly in some cases (e.g. in Docker).
|
||||
|
||||
|
||||
## Code Transpilation Issues
|
||||
|
||||
If you are using a JavaScript transpiler like babel or TypeScript, calling `evaluate()` with an async function might not work. This is because while `playwright` uses `Function.prototype.toString()` to serialize functions while transpilers could be changing the output code in such a way it's incompatible with `playwright`.
|
||||
|
||||
Some workarounds to this problem would be to instruct the transpiler not to mess up with the code, for example, configure TypeScript to use latest ecma version (`"target": "es2018"`). Another workaround could be using string templates instead of functions:
|
||||
|
||||
```js
|
||||
await page.evaluate(`(async() => {
|
||||
console.log('1');
|
||||
})()`);
|
||||
```
|
||||
|
||||
# Please file an issue
|
||||
|
||||
Playwright is a new project, and we are watching the issues very closely. As we solve common issues, this document will grow to include the common answers.
|
||||
@ -39,7 +39,8 @@ async function run() {
|
||||
{
|
||||
const readme = await Source.readFile(path.join(PROJECT_DIR, 'README.md'));
|
||||
const api = await Source.readFile(path.join(PROJECT_DIR, 'docs', 'api.md'));
|
||||
const mdSources = [readme, api];
|
||||
const troubleshooting = await Source.readFile(path.join(PROJECT_DIR, 'docs', 'troubleshooting.md'));
|
||||
const mdSources = [readme, api, troubleshooting];
|
||||
|
||||
const preprocessor = require('./preprocessor');
|
||||
messages.push(...await preprocessor.runCommands(mdSources, VERSION));
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user