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I am pleased to announce general availability of the rolling builds for CentOS Linux. Todays release includes CentOS Linux 7 iso based install media and the generic cloud images.
CentOS Linux rolling builds are point in time snapshot media rebuild from original release time, to include all updates pushed to mirror.centos.org's repositories. This includes all security, bugfix, enhancement and general updates for CentOS Linux. Machines installed from this media will have all these updates pre-included and will look no different when compared with machines installed with older media that have been yum updated to the same point in time. All rpm/yum repos remain on mirror.centos.org with no changes in either layout or content.
We will aim to update and issue for release a new set of these files at the end of every month going forward. Each released filename includes a datestamp and a buildtag to indicate the content included. Files marked as 20141129_02 indicate that it includes all content released to mirror.centos.org upto ( and including ) the 29th of Nov 2014 and is the second build of that cycle. While all build's are made public at buildlogs.centos.org/, only those that pass our QA and testing cycles will be marked as released, to be included in buildlogs.centos.org/rolling/. We will also do interim builds as needed ( for development and testing purposes ) at different points in time, those builds will not be marked for general release, but will still be avilable publicly.
Since there is a need to test these images, the release will always lag few days behind the datestamp ( and therefore content included ) in the release. My aim is to automate as much of this as possible going forward to reduce this time lag as much as possible, however we might not be able to remove it completely.
With every cycle, we hope to increase the content made available in this rolling format. Immediate next steps include bringing the CentOS Linux 7 livemedia into the rolling releases followed by CentOS Linux 6 content from the next ( December 2014 ) cycle.
Due to the way the installer works in CentOS-5, and its point in time we have no plans on including CentOS-5 in this cycle at this point.
For the sake of uniformity and communication, the release media will be referenced by the month it reflects, not the month it was released in. Making this release the Nov 2014 Rolling release.
Other content formats like containers and vendor specific images will aim to start with the same cycle as the main CentOS Linux media, but might move to a more frequent build and release cycle if needed. Special Interest Groups ( http://wiki.centos.org/SpecialInterestGroup ) wanting to do media and installer releases should also consider using the rolling timelines to sync with.
Finally, I want to highlight that we will always consider doing a rolling release to address major security issues like the recent heartbleed, shellshock and poodle patches.
- ----------- CentOS Linux distro installer media:
File: CentOS-7-x86_64-DVD-20141129_02.iso Sha256sum: 85a46c62b5bfc701678bef7854bb73af4ccfb840dfcbfb2f9b2189e08fe9438c
File: CentOS-7-x86_64-Everything-20141129_02.iso Sha256sum: f9fdd8b12c9529a1e3bf7628ebee964b2aeb9fd66540de7b369e0fde6f7a4236
File: CentOS-7-x86_64-Minimal-20141129_02.iso Sha256sum: e1338d13178f1c66c17386b7ced0b1459c677ff9a1cf095ac4db377234cc03fa
Symlinks are provided that will always map to the latest released builds, as follows ( including their current mapping ) http://buildlogs.centos.org/rolling/7/isos/x86_64/CentOS-7-x86_64-DVD.iso - -> CentOS-7-x86_64-DVD-20141129_02.iso http://buildlogs.centos.org/rolling/7/isos/x86_64/CentOS-7-x86_64-Everything... - -> CentOS-7-x86_64-Everything-20141129_02.iso http://buildlogs.centos.org/rolling/7/isos/x86_64/CentOS-7-x86_64-Minimal.is... - -> CentOS-7-x86_64-Minimal-20141129_02.iso
These symlinks will be updated to point at the latest tested and released media and make for a good target in automation that requires CentOS Linux media.
- ---------- Cloud and Instance Images:
The CentOS Linux 7 GenericCloud image is built to include cloud-init from the Extras/ repository. The image is made available in multiple formats, with identical content. The cloud images are released via http://cloud.centos.org/centos/7/images/
File: CentOS-7-x86_64-GenericCloud-20141129_01.qcow2 Desc: is the reference image. Size: 944 MB Sha256Sum: 7710ffdd497cf00fc72c22a3fa7cc7adb3424d3542521ca8fbe19eba9ded403f
File: CentOS-7-x86_64-GenericCloud-20141129_01.qcow2c Desc: This is the same image, run through the qemu qcow2 internal compression setup - while this image is suiteable for development and play, it comes with non trivial i/o performance penalties and therefore not recommended for production. Size: 399MB Sha256Sum: db42e4fb9565e75f0acbe6b54a5b8822f3f1e9783fb1a553e1552c72ceaff8df
File: CentOS-7-x86_64-GenericCloud-20141129_01.qcow2.xz Desc: This is the regular qcow2 file, run through the xz compression tool. This gives a regular qcow2 file, suiteable for production use. Size: 266MB Sha256Sum: 9b0b38c48a24164c15c33625972b87835501b6994c3ee894f6b79ce40e7d5e54
File: CentOS-7-x86_64-GenericCloud-20141129_01.raw Desc: This is a raw format file for systems that dont consume qcow2 image types. Its also suiteable to use with "qemu-img convert" to render into different formats. Size: 8GB. Sha256Sum: 2e643310bdb3cda775905408dbfe378a5eed04e91db193165178afc5ed5492b8
Symlinks are provided that will always map to the latest released builds, as follows ( including their current mapping ) http://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud.qcow2 - -> CentOS-7-x86_64-GenericCloud-20141129_01.qcow2 http://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud.qcow2c - -> CentOS-7-x86_64-GenericCloud-20141129_01.qcow2c http://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud.qcow2.x... - -> CentOS-7-x86_64-GenericCloud-20141129_01.qcow2.xz http://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud.raw - -> CentOS-7-x86_64-GenericCloud-20141129_01.raw
These symlinks will be updated to point at the latest tested and released media and make for a good target in automation that requires CentOS Linux media.
- ---------- For more information and comments please join us on the centos-devel mailing list ( http://lists.centos.org/ )
Enjoy!
- -- Karanbir Singh, Project Lead, The CentOS Project