Release Notes for 1.10.0 Release Candidate 1

These are the release notes for DC/OS 1.10.0 Release Candidate 1.

This release candidate is for testing only and not to be used in production.

DC/OS 1.10 Release Candidate 1 has a number of limitations that will be resolved at GA time.

  • You must upgrade Marathon-LB before upgrading to DC/OS 1.10.0. See the upgrade section for more information.
  • During upgrade to 1.10, there is a brief moment when the DNS resolution does not work. If a health check runs at that moment, it will fail and services will be reported as unhealthy.

Please try out the new features and updated data services. Provide any feedback through our support channel:

DC/OS 1.10 includes many new capabilities and expands the collection of data and developer services, with a focus on:

  • Core DC/OS service continuity - System resilience, IAM scalability & simplified upgrades.
  • Robust security - Custom CA certificate & file-based secrets support. Enterprise
  • Enterprise-ready networking - New DC/OS Edge-LB for higher availability and security. Enterprise
  • Data services enhancements across the board.
    • Rolling configuration update and upgrade support via the CLI. Enterprise
    • Ability to deploy Data Services into folders to enable multi team deployments. Enterprise
    • Ability to deploy to CNI-Based virtual networks.


New Features and Capabilities

Apache Mesos 1.4 and Marathon 1.5 Integrated.

  • DC/OS 1.10.0 is based on Mesos 1.4.0, here using master branch (pre-release) SHA 013f7e21, with over 1200 commits since the previous Mesos version. View the changelog.

  • DC/OS 1.10.0 is integrated with the latest release of Marathon, version 1.5. Resulting breaking changes and new features are documented below. For more information about Marathon 1.5, consult the Marathon changelog.


  • Configurable Spartan upstreams for domains (dnames). You can now configure Spartan to delegate a particular domain (e.g. “*”) to a particular upstream.

  • Increased CNI network support. DC/OS now supports any type of CNI network. View the documentation.

  • Edge-LB load balancer. Enterprise

    Edge-LB load balances Mesos tasks. Not supported in strict security mode in DC/OS Beta 1. View the documentation.

Security Enterprise

  • Custom CA certificate support. Installation time configuration options have been added that allow you to configure DC/OS Enterprise to use a custom CA certificate and corresponding private key, which DC/OS then uses for issuing all component certificates. The custom CA certificate can be an intermediate CA certificate so that that all certificates used within the DC/OS cluster derive from your organization’s X.509 certification hierarchy.

  • Enhanced secrets management with file-based secrets. You can now make a secret available to your service in the sandbox of the task. View the documentation.

  • Vastly improved IAM scalability and performance characteristics. The new system removes hard limits on the number of users, groups, and permissions that can be stored, and shows stable read and write performance as the dataset grows.

  • Docker pullConfig parameter. Use this parameter in your service definition to authenticate to a private Docker registry. View the documentation.

  • Enterprise CLI permissions management commands. It is now possible to manage permissions to protect resources using the DC/OS Enterprise CLI.

Updated DC/OS Data Services

  • Rolling Configuration Update and Upgrades support via the CLI.
  • Ability to deploy Data Services into Folders to enable multi team deployments. Enterprise
  • Ability to deploy to CNI-Based Virtual Networks.

The following updated data services packages are also in beta and are compatible with DC/OS 1.10.0.


  • Node and cluster health checks. Write your own custom health checks or use the predefined checks to access and use information about your cluster, including available ports, Mesos agent status, and IP detect script validation. View the documentation.
  • Enhanced upgrades with backup and restore. Enterprise
  • Enhanced upgrades with pre/post flight checks.
  • Universal Container Runtime (UCR). Adds port mapping support for containers running on the CNI network. Port mapping support allows UCR to have a default bridge network, similar to Docker’s default bridge network. This gives UCR feature parity with Docker Engine enabling use of Mesos Runtime as the default container runtime.
  • Scale and performance limits.


  • DC/OS 1.10.0 requires DC/OS CLI 0.5.x.

  • DC/OS CLI 0.5.x adds multi-cluster support with dcos cluster commands. Multi-cluster support has a number of consequences:

    • DC/OS CLI 0.4.x and 0.5.x use a different structure for the location of configuration files. DC/OS CLI 0.4.x has a single configuration file, which by default is stored in ~/.dcos/dcos.toml. DC/OS CLI 0.5.x has a configuration file for each connected cluster, which by default are stored in ~/.dcos/clusters/<cluster_id>/dcos.toml.
    • DC/OS CLI 0.5.x introduces the dcos cluster setup command to configure a connection to a cluster and log into the cluster.
    • Note:
      • Updating to the DC/OS CLI 0.5.x and running any CLI command triggers conversion from the old to the new configuration structure.
      • After you call dcos cluster setup, (or after conversion has occurred), if you attempt to update the cluster configuration using a dcos config set command, the command prints a warning message saying the command is deprecated and cluster configuration state may now be corrupted.
    • If you have the DCOS_CONFIG environment variable configured:
      • After conversion to the new configuration structure, DCOS_CONFIG is no longer honored.
      • Before you call dcos cluster setup, you can change the configuration pointed to by DCOS_CONFIG using dcos config set. This command prints a warning message saying the command is deprecated and recommends using dcos cluster setup.


The GUI sidebar tabs have been updated to offer a more intuitive experience.

  • The “Deployments” subpage under the “Services” tab has been moved to a toggle-able modal in the “Services” page.
  • The “Security” tab has been removed. The “Secrets” tab that used to be under “Security” is now a top-level tab. Enterprise
  • The “Universe” tab has been renamed to “Catalog” and the “Installed” subpage has been removed.
  • The “System Overview” tab has been renamed to “Overview”.

Breaking Changes

  • Marathon Networking API Changes in 1.5 The networking section of the Marathon API has changed significantly in version 1.5. Marathon can still accept requests using the 1.4 version of the API, but it will always reply with the 1.5 version of the app definition. This will break tools that consume networking-related fields of the service definition. View the documentation.

  • TLS 1.0 is no longer enabled by default in Admin Router. Enterprise

    TLS 1.0 no longer meets common minimum security requirements. To use TLS 1.0, set adminrouter_tls_1_0_enabled to true in your config.yaml at install time. The default is false.

  • Marathon-LB 1.11.0 or greater is required for DC/OS 1.10.0. Before upgrading to 1.10.0, uninstall your existing Marathon-LB package and reinstall the updated version.

  • Moved file location for the DC/OS CA bundle in the sandbox of Mesos tasks from $MESOS_SANDBOX/.ssl/ca.crt to $MESOS_SANDBOX/.ssl/ca-bundle.crt and declared the new file path to be stable.

  • REX-Ray configuration change. DC/OS 1.10.0 upgrades REX-Ray from v03.3 to v0.9.0 and the REX-Ray configuration format has changed. If you have specified custom REX-Ray configuration in the rexray_config parameter of your config.yaml file, either update the configuration to the new format or remove rexray_config and set the parameter to rexray_config_preset: aws, which configures the rexray_config parameter to the default REX-Ray configuration bundled with DC/OS. This option has the benefit of automatically upgrading your cluster’s REX-Ray configuration when you upgrade to a newer version of DC/OS. Note: The rexray_config_preset: aws option is only relevant to DC/OS clusters running on AWS.

  • New flow to change the dcos_url and log in. The new command to set up your cluster URL is dcos cluster setup <dcos_url>. For details, see CLI.

  • Marathon Jenkins Plugin and Marathon-Client Breaking Change Marathon 1.5, released with DCOS 1.10, made breaking changes to the API around Docker and management of networks. This breaking change has not yet been incorporated in the marathon-client, which is used by the marathon jenkins plugin. Marathon client and Marathon Jenkins Plugin will work in general, however they will fail to propagate configurations for networks if working with DCOS 1.10 or Marathon 1.5. A solution will be provided for the DCOS 1.10 GA release.

Known Issues and Limitations

  • Upgrade: During upgrade to 1.10, there is a brief moment when the DNS resolution does not work. If a health check runs at that moment, it will fail and services will be reported as unhealthy.
  • DCOS-14534 - Marathon: Verbose Server Banner.
  • DCOS-14536 - UI Vulnerable to Clickjacking (aka UI Redressing).
  • DCOS-16547 - Task state does not update after the agent running it was removed from the cluster.
  • DCOS_OSS-1340 - Spartan “autoip” DNS should resolve to host IP for UCR in bridge network.
  • INFINITY-1143 - Update / Uninstall. DSE does not support rolling upgrade.
  • INFINITY-1809 - [Data Svc] DC/OS Service Update / Config Update / Maintenance.
  • MARATHON-7736 - Marathon Client does NOT work with Marathon 1.5

Major Issues Fixed Since 1.10.0 Beta 2

  • DCOS-15590 - DCOS cli confirm() is not non-interactive safe.
  • INFINITY-213 - Integrate with DC/OS access controls. Enterprise
  • INFINITY-1356 - Support strict mode for DSE. Enterprise
  • INFINITY-2003 - Make C/* backup and restore tests work in strict mode. Enterprise
  • INFINITY-2054 - Extend --replace={true|false} for CLI.