14 DAY TRIAL // The development team behind Docker, the number one open-source application container engine for GNU/Linux operating systems, have had the pleasure of announcing that they have been working hard on the next major release of the software, Docker 1.10, which should be out in the coming weeks.
On January 15, 2016, the Docker devs announced the release of the first RC (Release Candidate) build for Docker 1.10, informing users about some important tips on updating engines and migrating images to new IDs, as the new version of the Docker Engine will store filesystem data and images in containers a bit differently.
How differently, you might ask? Well, Docker 1.10 will provide a more secure foundation for writing layers and images, a migration step will be available when upgrading old images, there will be a new distribution manifest, along with pull functionality, as well as a migration tool for minimizing the migration time.
"Starting from v1.10 we completely change the way Docker addresses the image data on disk. Previously, every image and layer used a randomly assigned UUID. In 1.10 we implemented a content addressable method using an ID, based on a secure hash of the image and layer data," said Arnaud Porterie in the announcement.
Docker 1.10 Release Candidate 1 is now available for testing
If you're interested in Docker and the new changes it brings, we strongly recommend that you take a look at the very long changelog attached at the end of the article for the RC1 version. Also, don't hesitate to read the entire announcement to learn how to prepare for the upgrade from Docker 1.9 or previous versions.
For those of you wishing to take the first Release Candidate build of the upcoming Docker 1.10 release for a test drive right now on your GNU/Linux operating systems, we've prepared downloads for a 64-bit universal binary and the source archive. Please keep in mind, though, that this is a pre-release version, not suitable for production use.