Overview

This check collects TokuMX metrics, including:

• Opcounters.
• Replication lag.
• Cache table utilization and storage size.

Setup

Installation

The TokuMX check is included in the Datadog Agent package. No additional installation is needed on your server.

Configuration

Prepare TokuMX

1. Install the Python MongoDB module on your MongoDB server using the following command:

   sudo pip install --upgrade "pymongo<3.0"
   

2. You can verify that the module is installed using this command:

   python -c "import pymongo" 2>&1 | grep ImportError && \
   echo -e "\033[0;31mpymongo python module - Missing\033[0m" || \
   echo -e "\033[0;32mpymongo python module - OK\033[0m"
   

3. Start the Mongo shell. In the shell, create a read-only user for the Datadog Agent in the admin database:

   # Authenticate as the admin user.
   use admin
   db.auth("admin", "<YOUR_TOKUMX_ADMIN_PASSWORD>")
   # Add a user for Datadog Agent
   db.addUser("datadog", "<UNIQUEPASSWORD>", true)
   

4. Verify that you created the user with the following command (not in the Mongo shell).

   python -c 'from pymongo import Connection; print Connection().admin.authenticate("datadog", "<UNIQUEPASSWORD>")' | \
   grep True && \
   echo -e "\033[0;32mdatadog user - OK\033[0m" || \
   echo -e "\033[0;31mdatadog user - Missing\033[0m"
   

For more details about creating and managing users in MongoDB, see the MongoDB Security documentation.

Validation

Run the Agent’s status subcommand and look for tokumx under the Checks section.

Data Collected

Metrics

Events

Replication state changes:

This check emits an event each time a TokuMX node has a change in its replication state.

Service Checks

tokumx.can_connect
Returns CRITICAL if the Agent is unable to connect to the monitored TokuMX instance. Returns OK otherwise.
Statuses: ok, critical

Troubleshooting

Need help? Contact Datadog support.

Further Reading

• Monitor key TokuMX metrics for MongoDB applications.