Date: Fri, 23 Mar 2018 15:43:19 -0400 From: Allan Jude <allanjude@freebsd.org> To: freebsd-hackers@freebsd.org Cc: =?UTF-8?B?S2FtaWxhIFNvdcSNa292w6E=?= <kamila@ksp.sk> Subject: Re: Easiest way to get a small VM disk image? Message-ID: <06bdc144-1cbd-c6e8-3a7c-f7110627a1d4@freebsd.org> In-Reply-To: <CAO7yDHrMqj%2B2r23zaHRP9YyvX9DBmV5WnpOFZGf2NtayQ%2BAc-Q@mail.gmail.com> References: <CAO7yDHrMqj%2B2r23zaHRP9YyvX9DBmV5WnpOFZGf2NtayQ%2BAc-Q@mail.gmail.com>
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On 03/23/2018 11:42, Kamila Součková wrote: > Hello, > > I want to build an OpenNebula[1]-compatible VM image of FreeBSD 11.1. One > requirement for my use case is that the image should initially be small > (not as in "take up little physical space", but as in "the size of the > virtual disk as visible in the VM should be small". Specifically, I want > the virtual disk size to be no more than 3GB (which should not be a > problem, as the default installation of FreeBSD takes a lot less than 3G). > > The VM images available in the official downloads have a virtual size of > 20GB. Therefore I need to somehow build my own image (or shrink the > existing ones). Here are the approaches I have thought about: > > - Create and partition an empty disk image, rsync the contents of the > official image into it. Problems: AFAIK requires a FreeBSD host to build > (in order to be able to create a UFS filesystem); requires juggling around > with loopback mounts and such. Probably still the most feasible option, but > I am not sure, which is why I'm asking. > - Create an empty image, boot it in a VM and install from an installation > ISO. Problem: not sure how to automate; might not get 1:1 parity with the > official VM image > - Somehow shrink the existing image. Problem: How? > - Find out how the official images are built and do that with a smaller > size. This is where this list comes in :-) > > Which (of these, or any other) is the easiest way to get a small image? > > Thanks a lot! > > Kamila > > [1] https://opennebula.org/ > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" > You should be able to generate a version of the official images easily: do an svn checkout, then: make -j <#cpus> buildworld buildkernel cd release make VMSIZE=2944M SWAPSIZE=128M VMFORMATS=raw DESTDIR=/tmp -DNOSRC -DNOPORTS -DNOPKG -DWITH_VMIMAGES vm-install Will create the image in /tmp/vmimages VMFORMATS can also be qcow2, vmdk, or vhd -- Allan Jude
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