Processes

Agent Check

Overview

The Process Check lets you:

• Collect resource usage metrics for specific running processes on any host: CPU, memory, I/O, number of threads, etc.
• Use Process Monitors: configure thresholds for how many instances of a specific process ought to be running and get alerts when the thresholds aren’t met (see Service Checks below).

Setup

Installation

The Process Check is included in the Datadog Agent package, so you don’t need to install anything else on your server.

Configuration

Unlike many checks, the Process Check doesn’t monitor anything useful by default. You must configure which processes you want to monitor, and how.

1. While there’s no standard default check configuration, here’s an example process.d/conf.yaml that monitors SSH/SSHD processes. See the sample process.d/conf.yaml for all available configuration options:

   init_config:
   
   instances:
    ## @param name - string - required
    ## Used to uniquely identify your metrics
    ## as they are tagged with this name in Datadog.
    #
    - name: ssh
   
      ## @param search_string - list of strings - required
      ## If one of the elements in the list matches, it return the count of
      ## all the processes that match the string exactly by default.
      ## Change this behavior with the parameter `exact_match: false`.
      #
      search_string: ["ssh", "sshd"]

   Some process metrics require either running the Datadog collector as the same user as the monitored process or privileged access to be retrieved. Where the former option is not desired, and to avoid running the Datadog collector as root, the try_sudo option lets the Process Check try using sudo to collect this metric. As of now, only the open_file_descriptors metric on Unix platforms is taking advantage of this setting. Note: the appropriate sudoers rules have to be configured for this to work:

   dd-agent ALL=NOPASSWD: /bin/ls /proc/*/fd/

2. Restart the Agent.

Validation

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

Data Collected

Metrics

All metrics are per instance configured in process.yaml, and are tagged process_name:<instance_name>.

Events

The Process Check does not include any events.

Service Checks

process.up:

The Agent submits this service check for each instance in process.yaml, tagging each with process:<name>.

For an instance with no thresholds specified, the service check has a status of either CRITICAL (zero processes running) or OK (at least one process running).

For an instance with thresholds specified, consider this example:

instances:
  - name: my_worker_process
    search_string: ["/usr/local/bin/worker"]
    thresholds:
      critical: [1, 7]
      warning: [3, 5]

The Agent submits a process.up tagged process:my_worker_process whose status is:

• CRITICAL when there are less than 1 or more than 7 worker processes
• WARNING when there are 1, 2, 6, or 7 worker processes
• OK when there are 3, 4, or 5 worker processes

Troubleshooting

Need help? Contact Datadog support.

Further Reading

To get a better idea of how (or why) to monitor process resource consumption with Datadog, check out this series of blog posts about it.