Connection to Mongodb fails from Strapi on Heroku - mongodb

Question

I deployed Strapi CMS to Heroku, but I get this error
Error connecting to the Mongo database. Server selection timed out after 30000 ms
Log:
2020-05-27T17:43:55.398256+00:00 heroku[web.1]: Starting process with command `npm start`
2020-05-27T17:43:58.724121+00:00 app[web.1]:
2020-05-27T17:43:58.724143+00:00 app[web.1]: > strapi-oskogen-mongodb#0.1.0 start /app
2020-05-27T17:43:58.724143+00:00 app[web.1]: > strapi start
2020-05-27T17:43:58.724143+00:00 app[web.1]:
2020-05-27T17:44:02.234160+00:00 app[web.1]: (node:23) Warning: Accessing non-existent property 'count' of module exports inside circular dependency
2020-05-27T17:44:02.234179+00:00 app[web.1]: (Use `node --trace-warnings ...` to show where the warning was created)
2020-05-27T17:44:02.234732+00:00 app[web.1]: (node:23) Warning: Accessing non-existent property 'findOne' of module exports inside circular dependency
2020-05-27T17:44:02.234879+00:00 app[web.1]: (node:23) Warning: Accessing non-existent property 'remove' of module exports inside circular dependency
2020-05-27T17:44:02.235021+00:00 app[web.1]: (node:23) Warning: Accessing non-existent property 'updateOne' of module exports inside circular dependency
2020-05-27T17:44:32.238852+00:00 app[web.1]: [2020-05-27T17:44:32.238Z] debug ⛔️ Server wasn't able to start properly.
2020-05-27T17:44:32.253150+00:00 app[web.1]: [2020-05-27T17:44:32.253Z] error Error connecting to the Mongo database. Server selection timed out after 30000 ms
My environments settings:
database.js
** server.js **
** response.js **
** config vars **
Site works well on localhost with both dev and prod environment. So it connects to MongoDB on Atlas and no problem with that.
I do not have any addons installed on Heroku.
** packages.json **
On Atlas side I opened all IPs in white list.
Any idea? Thank you! :)

Answer 1

My configuration for deployment of Strapi 3.0.1 on Heroku, both for develop and production environments:
module.exports = ({ env }) => ({
defaultConnection: "default",
connections: {
default: {
connector: "mongoose",
settings: {
uri: env("DATABASE_URI"),
ssl: { rejectUnauthorized: false }
},
options: {
ssl: true,
authenticationDatabase: "",
useUnifiedTopology: true,
pool: {
min: 0,
max: 10,
idleTimeoutMillis: 30000,
createTimeoutMillis: 30000,
acquireTimeoutMillis: 30000
}
},
},
},
});
server.js
module.exports = ({ env }) => ({
host: env('HOST', '0.0.0.0'),
port: env.int('PORT', 443), <-- 443 was critical to make it work on production
});
.env - local file
DATABASE_URI="mongodb+srv://OdegXXXXXUser:OXXXX20#odXXXXcluster-h9o2e.mongodb.net/odeXXXXXndb?retryWrites=true&w=majority"
HOST="0.0.0.0"
PORT="1337"
Vars on Heroku:
DATABASE_URI er identical as on localhost, the same database.
I hope it will help to anybody :-)

Answer 2

make this your database.json
{
"defaultConnection": "default",
"connections": {
"default": {
"connector": "mongoose",
"settings": {
"client": "mongo",
"host": "${process.env.DATABASE_HOST}",
"port": "${process.env.DATABASE_PORT}",
"database": "${process.env.DATABASE_NAME}",
"username": "${process.env.DATABASE_USERNAME}",
"password": "${process.env.DATABASE_PASSWORD}",
},
"options": {}
}
}
}
Also make sure to add package-lock.json to your git.ignore file.
then do
git add .
git commit -m "(message) "
git push heroku master
then
heroku open
Start your app servers too