Inconsistent connection parameters in credentials settings for smooth migration

[Svetlana Maltseva]

An old project could have difficulties with the connection if they move from mongodb-odb to atlas broker

With the old broker app uses environment variables (VCAP_SERVICES):
{
"mongodb-odb": [{
"label": "mongodb-odb",
"provider": null,
"plan": "standalone_small",
"name": "test4",
"tags": ["mongodb"],
"instance_name": "test4",
"binding_name": null,
"credentials": {
"database": "default",
"password": "password",
"servers": ["10.0.9.9:28000"],
"ssl": false,
"uri": "mongodb://username:password@10.0.9.9:28000/default?authSource=admin",
"username": "username"
},
"syslog_drain_url": null,
"volume_mounts": []
}]
}
And the users have the possibility to use either uri or set parameters using servers/users/pass/etc for connection

If we install app with Atlas, we will have something like:
{
"mongodb-atlas-aws": [{
"label": "mongodb-atlas-aws",
"provider": null,
"plan": "M10",
"name": "aws-test",
"tags": [],
"instance_name": "aws-test",
"binding_name": null,
"credentials": {
"username": "username",
"password": "password",
"uri": "mongodb+srv://ca6aaf79-5741-4ba0.xqzpq.mongodb.net"
},
"syslog_drain_url": null,
"volume_mounts": []
}]
}
As we can see, the users would have to rewrite their apps for making them work again:
if uri was used for connection then we do not have user/pass/defaultdbname ( connection documentation
mongodb://[username:password@]host1[:port1][,...hostN[:portN]][/[defaultauthdb][?options]]
Also, we could use format (ruby, probably some other languges/libraries)
client = Mongo::Client.new(
credentials["servers"],
:database => credentials["database"],
:user => credentials["username"],
:password => credentials["password"],
:auth_source => "admin"
)

In the end, I believe our credentials should be similar, otherwise, this will lead to fixing and pushing apps again. (let's not forget about if someone already uses atlas broker)

[Jason Mimick]

Working for Alpha release Fix: #4