From e1c4269763999e3b359fff19ad170e0110d3b457 Mon Sep 17 00:00:00 2001 From: Daniel P. Berrangé Date: Fri, 2 Oct 2020 12:32:43 +0100 Subject: block: deprecate the sheepdog block driver This thread from a little over a year ago: http://lists.wpkg.org/pipermail/sheepdog/2019-March/thread.html states that sheepdog is no longer actively developed. The only mentioned users are some companies who are said to have it for legacy reasons with plans to replace it by Ceph. There is talk about cutting out existing features to turn it into a simple demo of how to write a distributed block service. There is no evidence of anyone working on that idea: https://github.com/sheepdog/sheepdog/commits/master No real commits to git since Jan 2018, and before then just some minor technical debt cleanup. There is essentially no activity on the mailing list aside from patches to QEMU that get CC'd due to our MAINTAINERS entry. Fedora packages for sheepdog failed to build from upstream source because of the more strict linker that no longer merges duplicate global symbols. Fedora patches it to add the missing "extern" annotations and presumably other distros do to, but upstream source remains broken. There is only basic compile testing, no functional testing of the driver. Since there are no build pre-requisites the sheepdog driver is currently enabled unconditionally. This would result in configure issuing a deprecation warning by default for all users. Thus the configure default is changed to disable it, requiring users to pass --enable-sheepdog to build the driver. Reviewed-by: Markus Armbruster Reviewed-by: Thomas Huth Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Daniel P. Berrangé Message-Id: <20201002113243.2347710-3-berrange@redhat.com> Reviewed-by: Neal Gompa Signed-off-by: Kevin Wolf --- docs/system/deprecated.rst | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'docs/system') diff --git a/docs/system/deprecated.rst b/docs/system/deprecated.rst index 09ec8b1ae8..2ac3bfd5e9 100644 --- a/docs/system/deprecated.rst +++ b/docs/system/deprecated.rst @@ -390,6 +390,15 @@ The above, converted to the current supported format:: json:{"file.driver":"rbd", "file.pool":"rbd", "file.image":"name"} +``sheepdog`` driver (since 5.2.0) +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +The ``sheepdog`` block device driver is deprecated. The corresponding upstream +server project is no longer actively maintained. Users are recommended to switch +to an alternative distributed block device driver such as RBD. The +``qemu-img convert`` command can be used to liberate existing data by moving +it out of sheepdog volumes into an alternative storage backend. + linux-user mode CPUs -------------------- -- cgit v1.2.3-55-g7522