Add known issue for ceph rbd compatibility
Change-Id: Ic9693e08d2750c54a20e4e4d4ff060fc5741990e Related-Bug: 1716735
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@ -261,6 +261,26 @@ a stable charm update after the 17.08 release.
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https://bugs.launchpad.net/charm-heat/+bug/1714157
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Nova LXD Ceph support
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~~~~~~~~~~~~~~~~~~~~~
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Support for presentation of Ceph backed Cinder volumes to Nova LXD
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instances is supported in the Pike OpenStack release. This integration
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uses the Linux kernel RBD module and requires a minimum of a
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Linux 4.5 to support the default crush tunables for Luminous.
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Deployments using the release Xenial kernel (4.4) should set the crush
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tunables level to 'hammer':
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.. code:: bash
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juju run --unit ceph-mon/0 'sudo ceph osd crush tunables hammer'
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Xenial deployments using hardware enablement kernels (hwe) or
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deployments on later Ubuntu releases do not require this workaround.
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https://bugs.launchpad.net/charm-ceph/+bug/1716735
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Bugs Fixed
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==========
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