Install MongoDB software - PingIntelligence for APIs - 5.1

Update MongoDB default username and password

You can change the default username and password of MongoDB by editing the /opt/pingidentity/abs/mongo/abs_init.js file. Change the username and password and save the file. The following is a snippet of the abs_init.js file:

{
    user: “absuser”,
    pwd: “abs123",
    roles: [{ role: “clusterMonitor”, db: “admin” },
            { role: “readWrite”, db: “abs_metadata” },
            { role: “readWrite”, db: “abs_data” },
            { role: “readWrite”, db: “abs_mldata” },
            { role: “readWrite”, db: “local” } ]
});

Install MongoDB in replica set

• Copy /opt/pingidentity/abs/mongo/abs_init.js file to the MongoDB node.
• Copy /opt/pingidentity/abs/mongo/abs_rs.js file to the MongoDB node.

Download MongoDB on three nodes which would form the replica set for high-availability (HA).

Install MongoDB one each node:

1. Create the MongoDB directory structure: create mongo, data, logs, and key directory on each MongoDB node.

   # mkdir -p /opt/pingidentity/mongo/data /opt/pingidentity/mongo/logs \
   /opt/pingidentity/mongo/key

2. Download MongoDB 4.2 on each node and extract to /opt/pingidentity/mongo

   # cd /opt/pingidentity/
   /opt/pingidentity# wget \
   https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel70-4.2.0.tgz \
   -O mongodb.tgz && tar xzf mongodb.tgz -C /opt/pingidentity/mongo/ --strip-components=1

3. Update shell path variable and reload the shell.

   /opt/pingidentity# echo PATH=$PATH:/opt/pingidentity/mongo/bin >> ~/.bashrc;
   /opt/pingidentity# source ~/.bashrc

4. Start the MongoDB database on each node. absrs01 is the name of the replica set. You can choose your own name for the replica set.

   /opt/pingidentity# cd mongo
   /opt/pingidentity/mongo# mongod --dbpath ./data/ --logpath ./logs/mongo.log --port 27017 --replSet absrs01 --fork -bind_ip 0.0.0.0

   Note: bind_ip is required for MongoDB to accept connections coming from machines other than the local host.
5. Check MongoDB connectivity among the three nodes. On MongoDB node 1, run the following command to check connectivity with node 2:

   /opt/pingidentity/mongo# mongo --host <mongo node 2 IP address> --port 27017

6. Navigate to abs_rs.js file and edit to configure the IP address of the primary and secondary MongoDB nodes:

   rsconf = {
   	  _id: "absrs01",
   	  members: [
   	    {
   	     _id: 0,
   	     host: "127.0.0.1:27017",
   	     priority: 10
   	    },
   	    {
   	     _id: 1,
   	     host: "<Mongo Node 2 IP>:27017",
   	     priority: 2
   	    },
   	    {
   	     _id: 2,
   	     host: "<Mongo Node 3 IP>:27017",
   	     priority: 2
   	    }
   	   ]
   	};
   rs.initiate(rsconf)
   rs.conf();
   exit
   

   Note: Make sure the secondary MongoDB nodes are reachable, and their host names are resolvable from the primary MongoDB node.
7. Initiate the configuration by entering the following command on MongoDB node 1’s shell:

   /opt/pingidentity/mongo# mongo --port 27017 < abs_rs.js

8. Verify that all the MongoDB nodes are running. On each MongoDB node, enter the following:

    /opt/pingidentity/mongo# mongo --port 27017

   The primary node will display the following prompt:

   absrs01:PRIMARY>

   The secondary nodes will display the following prompt:

   absrs01:SECONDARY>

9. Create User and initialize the database using abs_init.js file after making necessary modifications.

   On the primary node (node 1) Enter the following command:

   # mongo --host <mongo node 1 IP> --port 27017 < abs_init.js

   Note: user name and password should be changed from the default values.
10. Generate a MongoDB key file.

    /opt/pingidentity/mongo# openssl rand -base64 741 >key/mongodb-keyfile

11. Change the key file permission.

     /opt/pingidentity/mongo# chmod 600 key/mongodb-keyfile

12. Copy the key file generated in step 11 on each node of the replica set
13. Shutdown MongoDB using the following command:

    # mongod --dbpath ./data --shutdown

14. Restart all the MongoDB nodes with a key file and enable MongoDB authentication.

    /opt/pingidentity/mongo# mongod --auth --dbpath ./data/ --logpath \
    ./logs/mongo.log --port 27017 --replSet absrs01 --fork --keyFile ./key/mongodb-keyfile -bind_ip 0.0.0.0

    Note:

    • bind_ip is required for MongoDB to accept connections coming from machines other than the local host.
    • The MongoDB cache size should be restricted to 25% of system memory. You can configure this by using MongoDB's wiredTigerCacheSizeGB option.

Starting MongoDB with SSL