Posted March 8, 2017

Apache Mesos 1.2.0 Released

The latest Mesos release, 1.2.0, is now available for download. This release includes the following features and improvements:

  • MESOS-5931 - Experimental support for auto backend in Mesos Containerizer, prefering overlayfs then aufs. Please note that the bind backend needs to be specified explicitly through the agent flag --image_provisioner_backend since it requires the sandbox already existed.

  • MESOS-6402 - Experimental support for rlimit in Mesos containerizer. The isolator adds support for setting POSIX resource limits (rlimits) for containers launched using the Mesos containerizer. POSIX rlimits can be used to control the resources a process can consume. See docs for details.

  • MESOS-6419 - Experimental: Teardown unregistered frameworks. The master now treats recovered frameworks very similarly to frameworks that are registered but currently disconnected. For example, recovered frameworks will be reported via the normal “frameworks” key when querying HTTP endpoints. This means there is no longer a concept of “orphan tasks”: if the master knows about a task, the task will be running under a framework. Similarly, “teardown” operations on recovered frameworks will now work correctly.

  • MESOS-6460 - Experimental: Container Attach and Exec. This feature adds new Agent APIs for attaching a remote client to the stdin, stdout, and stderr of a running Mesos task, as well as an API for launching new processes inside the same container as a running Mesos task and attaching to its stdin, stdout, and stderr. At a high level, these APIs mimic functionality similar to docker attach and docker exec. The primary motivation for such functionality is to enable users to debug their running Mesos tasks.

  • MESOS-6758 - Experimental support for ‘Basic’ auth docker private registry on Mesos Containerizer. Until now, the mesos containerizer always assumed Bearer auth, but we now also support basic auth for private registries. Please note that the AWS ECS uses Basic authorization but it does not work yet due to the redirect issue MESOS-5172.

More than 200 other bug fixes and improvements made it into this release. For full release notes with all features and bug fixes, please refer to the CHANGELOG.


Rolling upgrades from a Mesos 1.1.0 cluster to Mesos 1.2.0 are straightforward. There are just some minor, backwards compatible deprecations. Please refer to the upgrade guide for detailed information on upgrading to Mesos 1.2.0.

Try it out

We encourage you to try out this release and let us know what you think. If you run into any issues, please let us know on the user mailing list and IRC.


Thanks to the 56 contributors who made Mesos 1.2.0 possible:

Aaron Wood, Abhishek Dasgupta, Adam B, Alexander Rojas, Alexander Rukletsov, Alex Clemmer, Anand Mazumdar, Andrew Schwartzmeyer, Anindya Sinha, Armand Grillet, Avinash Sridharan, Benjamin Bannier, Benjamin Hindman, Benjamin Mahler, Bruce Merry, Chengwei Yang, Daniel Pravat, David Forsythe, Dmitry Zhuk, Gastón Kleiman, Gilbert Song, Greg Mann, Guangya Liu, Haosdent Huang, Ilya Pronin, Jacob Janco, James Peach, Jan Schlicht, Jay Guo, Jeff Malnick, Jiang Yan Xu, Jie Yu, Joerg Schad Johannes Unterstein, Joris Van Remoortere, Joseph Wu, Kevin Klues, Lior Zeno, Manuwela Kanade, Megha Sharma, Michael Park, Miguel Bernadin, Neil Conway, Nicholas Sun, Qian Zhang, Ronald Petty, Santhosh Kumar Shanmugham, Sivaram Kannan, Srinivas Brahmaroutu, Thomas Maurice, Till Toenshoff, Tomasz Janiszewski, Vijay Srinivasaraghavan, Vinod Kone, Yubo Li, and Zhitao Li.