DC/OS cluster nodes generate logs that contain diagnostic and status information for DC/OS core components and DC/OS services.
Service, task, and node logs
The logging component provides an HTTP API
/system/v1/logs/ that exposes the system logs.
You can access information about DC/OS scheduler services, like Marathon or Kafka, with the following CLI command:
dcos service log --follow <scheduler-service-name>
You can access DC/OS task logs by running this CLI command:
dcos task log --follow <service-name>
You access the logs for the master node with the following CLI command:
dcos node log --leader
To access the logs for an agent node, run
dcos node to get the Mesos IDs of your nodes, then run the following CLI command:
dcos node log --mesos-id=<node-id>
You can download all the log files for your service from the Services > Services tab in the DC/OS GUI. You can also monitor stdout/stderr.
For more information, see the Service and Task Logs quick start guide.
DC/OS components use
systemd-journald to store their logs. To access the DC/OS core component logs, SSH into a node and run this command to see all logs:
journalctl -u "dcos-*" -b
You can view the logs for specific components by entering the component name. For example, to access Admin Router logs, run this command:
journalctl -u dcos-nginx -b
You can find which components are unhealthy in the DC/OS GUI Nodes tab.
Streaming logs from machines in your cluster isn’t always viable. Sometimes you need a history of what’s happened, which requires a method for storing and aggregating logs. These topics describe some of the most common solutions:
Getting started with DC/OS logging…Read More
Accessing system and component logs
You can restrict user access to system and component logs.…Read More
Configuring Task Log Output and Retention
Task environment variables that influence logging…Read More
Controlling Access to Task Logs
You can control user access to task logs by using Marathon groups for jobs and services. You can then assign permissions to access these groups, allowing you to control which logs a user can access.…Read More
You can aggregate your system logs by using ELK and Splunk.…Read More
The Logging API exposes node, component, and container (task) logs.…Read More
Logging API Examples
This topic provides common usage examples for the Logging API.…Read More