I try to connect to a managed MongoDB from an Express/NodeJS component hosted in Digital Ocean apps. The MongoDB database is added as component to the app. This created a DATABASE_URL env variable and I’m using that.
But my express app crashes with MongoServerSelectionError: self signed certificate in certificate chain
What could cause that? I can connect from MongoDB compass, but that is a different connection string. (with certificate)
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Hello, have you tried using the certificate that is provided by the bound environment variable?
And use the ssl cert provided by ${<db-name>.CA_CERT} (mapping to whatever env name you would like when you connect, making sure to specify the sslCA:
https://mongoosejs.com/docs/tutorials/ssl.html#ssl-validation
Thanks, not sure if this is the best way, but this works:
let mongoCertPath = path.resolve("./ca-certificate.crt");
if (process.env.CA_CERT) {
fs.writeFileSync(mongoCertPath, process.env.CA_CERT);
}
let client = new MongoClient(process.env.DATABASE_URL, {
sslCA: mongoCertPath,
});
let clientPromise = client.connect();
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