Which is the best config server for MongoDB?
Starting in MongoDB 3.2, config servers for sharded clusters can be deployed as a replica set (CSRS) instead of three mirrored config servers (SCCC). Using a replica set for the config servers improves consistency across the config servers, since MongoDB can take advantage of the standard replica set read and write protocols for the config data.
How to convert config servers to CSRs in MongoDB?
To convert your config servers from SCCC to CSRS, see the MongoDB 3.4 manual Upgrade Config Servers to Replica Set. Config servers store the metadata for a sharded cluster.
Can a MongoDB cluster be read only or offline?
Depending on the number of config servers impacted, the cluster may be read-only or offline for a period of time. Changed in version 3.4. Starting in MongoDB 3.2, config servers for sharded clusters can be deployed as a replica set (CSRS) instead of three mirrored config servers (SCCC).
What should the bind _ IP be for mongod?
mongos or mongod installed from official .deb and .rpm packages have the bind_ip configuration set to 127.0.0.1 by default. net.unixDomainSocket.pathPrefix ¶ Type : string
When does MongoDB read from the Admin database?
MongoDB reads from the admin database for authentication and authorization data and other internal uses. MongoDB reads from the config database when a mongos starts or after a change in the metadata, such as after a chunk migration. Shards also read chunk metadata from the config servers.
How to set mongod.conf bind _ IP?
Normally, mongod is run with the –config /etc/mongod.conf parameter. It’s easier to change the config file instead of hunting down the script what runs it as a daemon and getting systemd to reload and use it.
How to secure MongoDB installation in Ubuntu 20.04?
To do this, follow our tutorial on How To Secure MongoDB on Ubuntu 20.04. Assuming you followed the prerequisite initial server setup tutorial and enabled a UFW firewall on your server, your MongoDB installation will be inaccessible from the internet.
How to configure remote access for MongoDB?
In most cases, MongoDB should only be accessed from certain trusted locations, such as another server hosting an application. One way to configure this is to run the following command on your MongoDB server, which opens up access on MongoDB’s default port while explicitly only allowing the IP address of the other trusted server.