Can I get dpkg to ignore an error returned from a post-installation script?

Question

I'm trying to create a Puppeteer function in GCP which can be triggered by Pub/Sub messages. The function is callable, but doesn't behave as expected and throws a Timeout Error once browser tries to initialize. Could the trigger possibly be using a NodeJS environment different from HTTP trigger?

I'm also very new to NodeJS, so I apologize ahead of time if the issue is blatantly obvious.

I've created an HTTP trigger for the function which behaves as expected. I copy/paste the Puppeteer Function below into the index.js when creating the Cloud Function, but separated in example for clarity that both triggers are running the identical function.

Puppeteer Function

const puppeteer = require('puppeteer');

scrapeUglyWebsite = () => {
    return new Promise(async(resolve, reject) => {
        await puppeteer.launch({
            headless: true,
            args: ['--no-sandbox']
        })
            .then(async (browser) => {
                const page = await browser.newPage();
                await page.goto('http://suzannecollinsbooks.com/', {waitUntil: 'load', timeout: 0})
                    .then(async () => {
                        //Wait for content to load
                        await page.waitForFunction('document.body !== null && document.body.innerText.includes(\'Jon Scieszka\')');
                        //Evaluate page contents
                        const dom_eval = await page.evaluate(() => document.body.innerText.includes("Here’s a picture of me with a rat"));
                        await browser.close();
                        resolve(dom_eval);
                    });
            }).catch((err) => {
                reject(err);
            });
    });
};

HTTP Trigger - index.js

exports.cloudFunctionTest = (req, res) => {
    scrapeUglyWebsite()
        .then((results) => {
            if(results) {
                res.send('Suzanne Collins takes pictures with rats.');
            } else {
                res.send("Suzzane Collins doesn't take pictures with rats.");
            };
        })
        .catch((err) => {
            res.send(err.toString());
        });

Pub/Sub Trgger - index.js

exports.cloudFunctionTest = (data, context) => {
    scrapeUglyWebsite()
        .then((results) => {
            if(results) {
                console.log('Suzanne Collins takes pictures with rats.');
            } else {
                console.log("Suzzane Collins doesn't take pictures with rats.");
            };
        })
        .catch((err) => {
            console.log(err.toString());
        });
};

package.json

{
  "name": "test",
  "version": "0.0.1",
  "engines": {
    "node": "8"
  },
  "dependencies": {
    "puppeteer": "^1.6.0"
  }
}

HTTP Trigger behaves correctly with the expected result

Suzanne Collins takes pictures with rats.

Pub/Sub Trigger throws the following error with no output

TimeoutError: Timed out after 30000 ms while trying to connect to Chrome! The only Chrome revision guaranteed to work is r662092

Solution

You can edit the post install script at /var/lib/dpkg/info/astah-community.postinst to comment out a portion that is failing. Or you can just rename/remove that file to prevent dpkg from running it at all.

Once you've done one of those you can use dpkg --configure astah-community to have dpkg retry the configuration process, and hopefully have that succeed.

Comments

[wool.in.silver]

Yes, that worked! Thankyou.

[soger]

Thanks, worked for me too, just don't try to do it with aptitude, for some reason it keeps replacing my edited postinst script. But apt-get worked for me.

[Sanjay Vamja]

More details given here: billauer.co.il/blog/2019/07/apt-install-force-installed

[Elvis Ciotti]

Worked to remove mysql-server failing on ubuntu 20. thanks. /var/lib/dpkg/info/mysql-server-*