2019-09-26 15:42:56 +00:00
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.. _ceph-releases-general:
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2015-03-15 20:59:14 +00:00
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2019-09-26 15:42:56 +00:00
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=======================
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Ceph Releases (general)
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=======================
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.. toctree::
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:maxdepth: 1
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Understanding the release cycle
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-------------------------------
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Starting with the Nautilus release (14.2.0), there is a new stable release cycle
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every year, targeting the month of March. Each stable release series will receive a name
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(e.g., 'Mimic') and a major release number (e.g., 13 for Mimic because 'M' is
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the 13th letter of the alphabet).
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Releases are named after a species of cephalopod (usually the common
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name, since the latin names are harder to remember or pronounce).
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Version numbers have three components, *x.y.z*. *x* identifies the release
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cycle (e.g., 13 for Mimic). *y* identifies the release type:
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2022-01-12 02:04:44 +00:00
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* x.0.z - development versions
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* x.1.z - release candidates (for test clusters, brave users)
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* x.2.z - stable/bugfix releases (for users)
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Release candidates (x.1.z)
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^^^^^^^^^^^^^^^^^^^^^^^^^^
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There is a feature freeze roughly two months prior to the planned
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initial stable release, after which focus shifts to stabilization and
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bug fixes only.
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* Release candidate release every 1-2 weeks
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* Intended for final testing and validation of the upcoming stable release
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Stable releases (x.2.z)
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^^^^^^^^^^^^^^^^^^^^^^^
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Once the initial stable release is made (x.2.0), there are
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semi-regular bug-fix point releases with bug fixes and (occasionally)
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feature backports. Bug fixes are accumulated and included in
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the next point release.
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* Stable point release every 4 to 6 weeks
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* Intended for production deployments
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* Bug fix backports for 2 full release cycles (2 years).
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* Online, rolling upgrade support and testing from the last two (2)
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stable release(s) (starting from Luminous).
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* Online, rolling upgrade support and testing from prior stable point
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releases
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For each stable release:
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* `Integration and upgrade tests
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<https://github.com/ceph/ceph/tree/master/qa/suites/>`_ are run on a regular basis
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and `their results <http://pulpito.ceph.com/>`_ analyzed by Ceph
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developers.
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* `Issues <http://tracker.ceph.com/projects/ceph/issues?query_id=27>`_
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fixed in the development branch (master) are scheduled to be backported.
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* When an issue found in the stable release is `reported
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<http://tracker.ceph.com/projects/ceph/issues/new>`_, it is
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triaged by Ceph developers.
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* The `stable releases and backport team <http://tracker.ceph.com/projects/ceph-releases/wiki>`_
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publishes ``point releases`` including fixes that have been backported to the stable release.
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Lifetime of stable releases
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---------------------------
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The lifetime of a stable release series is calculated to be approximately 24
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months (i.e., two 12 month release cycles) after the month of the first release.
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For example, Mimic (13.2.z) will reach end of life (EOL) shortly after Octopus
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(15.2.0) is released. The lifetime of a release may vary because it depends on
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how quickly the stable releases are published.
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Detailed information on all releases, past and present, can be found at :ref:`ceph-releases-index`
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