Documentation for Mesosphere DC/OS 1.9

Welcome to the documentation for DC/OS 1.9. For information about new and changed features, see the release notes.

Release Notes

Release notes for DC/OS 1.9.…Read More


The overview topics help you get started and learn the DC/OS fundamentals.…Read More

Installing, Patching, and Upgrading

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The DC/OS web interface provides a rich graphical view of your DC/OS cluster. With the web interface you can view the current state of your entire cluster and DC/OS services. The web interface is installed as a part of your DC/OS installation.…Read More


You can use the DC/OS command-line interface (CLI) to manage your cluster nodes, install DC/OS packages, inspect the cluster state, and administer the DC/OS service subcommands.…Read More

Administering Clusters

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DC/OS provides a number of tools out-of-the-box, ranging from basic network connectivity between containers to more advanced features, such as load balancing and service discovery.…Read More


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DC/OS applications lose their state when they terminate and are relaunched. In some contexts, for instance, if your application uses MySQL, or if you are using a stateful service like Kafka or Cassandra, you’ll want your application to preserve its state. Configure Mesos mount disk resources to enable users to create tasks that can be restarted without data loss. Learn how to create stateful applications.…Read More


The metrics component provides metrics from DC/OS cluster hosts, containers running on those hosts, and from applications running on DC/OS that send StatsD metrics to the Mesos Metrics Module. The metrics component is natively integrated with DC/OS and is available per-host from the /system/v1/metrics/v0 HTTP API endpoint.…Read More

Monitoring, Logging, and Debugging

Monitoring the health of all the pieces that make up DC/OS is vital to datacenter operators and for troubleshooting hard-to-diagnose bugs. You can monitor the health of your cluster components from the DC/OS UI component health page. The component health page displays information from the system health API, which monitors the core DC/OS components.…Read More

Deploying Jobs

You can create scheduled jobs in DC/OS without installing a separate service. Create and administer jobs in the DC/OS web interface, the DC/OS CLI, or via an API.…Read More

Deploying Services and Pods

DC/OS uses Marathon to manage processes and services. Marathon is the “init system” for DC/OS. Marathon starts and monitors your applications and services, automatically healing failures.…Read More


This is a collection of tutorials about using DC/OS.…Read More

API Reference


The DC/OS API is a collection of routes backed by DC/OS components that are made available through an API gateway called Admin Router.…Read More

Developing DC/OS Services

This section describes the developer-specific DC/OS components, explaining what is necessary to package and provide your own service on DC/OS.…Read More