Can't connect to mongo atlas

[pfarah65]

I cannot connect to my mongoDB Atlast server, times out after 15 seconds.
This is my mongo url
mongo-url = "mongodb+srv://USERNAME:PASS@MYCLUSTER.mongodb.net/local"
Unable to connect to MongoDB using URL REDACTED@MYCLUSTER.mongodb.net/local: timed out after 15 seconds
I can connect to it using mongo with the same url, but I get an error when using monstache.
This command works from the same server:
/usr/bin/mongo "mongodb+srv://USERNAME:PASS@MYCLUSTER.mongodb.net/local"

[rwynn]

Have you tried without the +srv part?

mongodb://USERNAME:PASS@MYCLUSTER.mongodb.net/local

I've not tried this 3.6 feature before so not sure the mgo golang driver supports it yet.

Also, have you tried without connecting directly to local.

[pfarah65]

Yes, I tried those and it didn't work, thanks anyways, your work is appreciated in the community!

[rwynn]

If you can post just the type of account you are using on Atlas I can try to replicate it on my end.

And you said that you can connect remotely just not with monstache? I'm assuming you meant by same server the same server as monstache is running on. And not same server as mongod.

[pfarah65]

What do you mean the type of account?
Yes thats correct, same server running monstache.

[rwynn]

I just mean a free, basic, pro, enterprise. I ask because in the past I noticed that the free account had some bugs (could not read the oplog) that the paid accounts did not have.

When that bug occurred a long time ago I reported it to MongoDB and they fixed it. So at least at that time monstache was able to connect to Atlas. I even sent MongoDB a link to a test repo so they could replicate the issue -> https://github.com/rwynn/mgo-atlas-test. Note, since creating that repo Monstache has undergone lots of changes including switching providers for the mgo driver to https://github.com/globalsign/mgo.

[pfarah65]

I'm using the free version, I will check that out thanks.

[rwynn]

One more suggestion before I try to reproduce on my end. Have you tried with a config like this?

mongo-url = "mongodb://USERNAME:PASS@MYCLUSTER.mongodb.net"

[mongo-dial-settings]
ssl = true

[pfarah65]

Just tried it, I'm still getting "Unable to connect to MongoDB using URL timed out after 15 seconds

[pfarah65]

I was able to do a work around and change my link format like this:
mongodb://:@cluster0-shard-00-00-
rb899.mongodb.net:27017,cluster0-shard-00-01-
rb899.mongodb.net:27017,cluster0-shard-00-02-
rb899.mongodb.net:27017/?ssl=true&replicaSet=Cluster0-shard-
0&authSource=admin

[rwynn]

Not sure if this could be related. Since this is not merged maybe the default auth method is not yet supported? globalsign/mgo#282

[rwynn]

Ok, I was able to connect using the following combination:

• Use the old URI format not the one with mongodb+srv (so your workaround)
• Append &authMechanism=SCRAM-SHA-1 to the URL (this is key so that it doesn't use the old default)
• Configure monstache with change-stream-namespaces to listen for changes which uses the API instead of the default of trying to connect and tail the local.oplog.rs collection.

edit - to support direct connection to the oplog (without change-stream-namespaces) you might be able to follow the instructions here.

[rwynn]

Forget to mention that I tested with the whitelist set at connect from anywhere instead of an IP. It should still work with IP whitelisting I would assume.

[pfarah65]

Okay thanks for the help!