Problem with docker integration

[JBustin]

Hello,

I try to run my cypress + percy integration tests in docker, for a sandboxed integration in CI.
Cypress run command works.
Percy-cypress exec command also works without PERCY_TOKEN.
But Percy-cypress exec command fails with PERCY_TOKEN.
It seems that there is a problem when percy-cypress tries to push data to percy-agent :

The request we sent was:

Method: POST
URL: http://localhost:5338/percy/snapshot

No response was received within the timeout.

https://on.cypress.io/request
...

My dockerfile :

FROM cypress/base:10
RUN mkdir -p /usr/app/src
WORKDIR /usr/app/src
COPY .docker/cypress/package* ./cypress.json ./
ENV CI=1
RUN npm ci
CMD ["npm", "start"]

And the package.json used to build the docker image :

{
  "name": "cypress-container",
  "version": "1.0.0",
  "main": "index.js",
  "scripts": {
    "start": "percy exec -t 350 -- cypress run"
  },
  "dependencies": {
    "@percy/cypress": "^2.3.1",
    "cypress": "^4.5.0"
  }
}

Am I missing something ?
Is there an other way to use cypress + percy inside docker ?

Regards

Ps: other thing, failing builds never finish

[percy] stopping percy...
[percy] waiting for 3 snapshots to complete...

[JBustin]

After a lot of tests, I cannot reproduce my own previous error, but I have a new one, more expected :

(node:18) UnhandledPromiseRejectionWarning: Error: Page crashed!
    at Page._onTargetCrashed (/usr/app/src/node_modules/puppeteer/lib/Page.js:200:28)
    at CDPSession.Page.client.on (/usr/app/src/node_modules/puppeteer/lib/Page.js:120:57)

It seems that puppeteer is not proper configured to run in docker : puppeteer/puppeteer#1321 (comment)

Puppeteer is runned by percy. Any idea to resolve it ?

Regards

[Edit] could not there be an official docker image for percy-cypress ?

[JBustin]

I've finally find the trick by using --shm-size docker option :

docker run --shm-size=256m ...

Just look at the builds that never finish...

And probably, some tricks to improve the docker image. I think it should be great to share a docker image or Dockerfile example.