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5. Monitor database with Percona Monitoring and Management (PMM)

In this section you will learn how to monitor Percona Server for MongoDB with Percona Monitoring and Management (PMM) .

Note

Only PMM 2.x versions are supported by the Operator.

PMM is a client/server application. It includes the PMM Server and the number of PMM Clients running on each node with the database you wish to monitor.

A PMM Client collects needed metrics and sends gathered data to the PMM Server. As a user, you connect to the PMM Server to see database metrics on a number of dashboards .

PMM Server and PMM Client are installed separately.

Install PMM Server

You must have PMM server up and running. You can run PMM Server as a Docker image, a virtual appliance, or on an AWS instance. Please refer to the official PMM documentation for the installation instructions.

Install PMM Client

To install PMM Client as a side-car container in your Kubernetes-based environment, do the following:

  1. Authorize PMM Client within PMM Server.

    1. Generate the PMM Server API Key . Specify the Admin role when getting the API Key.

    Warning: The API key is not rotated automatically.

    1. Edit the deploy/secrets.yaml secrets file and specify the PMM API key for the PMM_SERVER_API_KEY option.

    2. Apply the configuration for the changes to take effect.

      $ kubectl apply -f deploy/secrets.yaml -n <namespace>

    1. Edit the deploy/secrets.yaml secrets file and specify the following:

    2. The user name of your PMM Server (admin by default) in the PMM_SERVER_USER key

    3. The password you set for the PMM Server during its installation in the PMM_SERVER_PASSWORD key.

    4. Apply the configuration for the changes to take effect.

      $ kubectl apply -f deploy/secrets.yaml -n <namespace>

  2. Update the pmm section in the deploy/cr.yaml file:

    • Set pmm.enabled=true.
    • Specify your PMM Server hostname / an IP address for the pmm.serverHost option. The PMM Server IP address should be resolvable and reachable from within your cluster.

      pmm:
    enabled: true
    image: percona/pmm-client:{{pmm2recommended}}
    serverHost: monitoring-service
    3. Apply the changes:

    $ kubectl apply -f deploy/cr.yaml -n <namespace>

  3. Check that corresponding Pods are not in a cycle of stopping and restarting. This cycle occurs if there are errors on the previous steps:

    $ kubectl get pods -n <namespace>
$ kubectl logs <cluster-name>-rs0-0 -c pmm-client -n <namespace>

Check the metrics

Let’s see how the collected data is visualized in PMM.

  1. Log in to PMM server.
  2. Click MongoDB from the left-hand navigation menu. You land on the Instances Overview page.
  3. Select your cluster from the Clusters drop-down menu and the desired time range on the top of the page. You should see the metrics.
  4. Click MongoDB → Other dashboards to see the list of available dashboards that allow you to drill down to the metrics you are interested in.

Next steps

What’s next

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Last update: 2024-09-15