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        <xi:include href="special/vm-tools.section.xml" />

     

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doc/builders/special/vm-tools.section.md

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       # vmTools {#sec-vm-tools}

     

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       A set of VM related utilities, that help in building some packages in more advanced scenarios.

     

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       ## `vmTools.createEmptyImage` {#vm-tools-createEmptyImage}

     

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       A bash script fragment that produces a disk image at `destination`.

     

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       ### Attributes

     

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       * `size`. The disk size, in MiB.

     

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       * `fullName`. Name that will be written to `${destination}/nix-support/full-name`.

     

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       * `destination` (optional, default `$out`). Where to write the image files.

     

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       ## `vmTools.runInLinuxVM` {#vm-tools-runInLinuxVM}

     

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       Run a derivation in a Linux virtual machine (using Qemu/KVM). By default, there is no disk image; the root filesystem is

     

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       a `tmpfs`, and the nix store is shared with the host (via the 9P protocol). Thus, any pure Nix derivation should run

     

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       unmodified.

     

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       If the build fails and Nix is run with the `-K` option, a script `run-vm` will be left behind in the temporary build

     

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       directory that allows you to boot into the VM and debug it interactively.

     

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       ### Attributes

     

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       * `preVM` (optional). Shell command to be evaluated *before* the VM is started (i.e., on the host).

     

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       * `memSize` (optional, default `512`). The memory size of the VM in megabytes.

     

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       * `diskImage` (optional). A file system image to be attached to `/dev/sda` (Note that currently we expect the image to

     

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         contain a filesystem, not a full disk image with a partition table etc).

     

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       ### Examples

     

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       ```nix

     

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       # Build the derivation hello inside a VM

     

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       runInLinuxVM hello

     

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       # Build inside a VM with extra memory

     

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       runInLinuxVM (hello.overrideAttrs (_: { memSize = 1024; }))

     

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       # Use VM with a disk image (implicitly sets `diskImage`, see `vmTools.createEmptyImage`)

     

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       runInLinuxVM (hello.overrideAttrs (_: { preVM = createEmptyImage { size = 1024; fullName = "vm-image"; }; }))

     

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       ```

     

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       <!-- TODO

     

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       ## `vmTools.extractFs` {#vm-tools-extractFs}

     

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       ## `vmTools.extractMTDfs` {#vm-tools-extractMTDfs}

     

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       -->

     

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       ## `vmTools.runInLinuxImage` {#vm-tools-runInLinuxImage}

     

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       Like [](#vm-tools-runInLinuxVM), but run the build not using the `stdenv` from the Nix store, but using the tools

     

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       provided by `/bin`, `/usr/bin`, etc. from the specified filesystem image, which typically is a filesystem containing a

     

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       non-NixOS Linux distribution.

     

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       ## `vmTools.makeImageTestScript` {#vm-tools-makeImageTestScript}

     

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       Generate a script that can be used to run an interactive session in the given image.

     

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       ### Examples

     

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       ```nix

     

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       # Create a script for running a Fedora 27 VM

     

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       makeImageTestScript diskImages.fedora27x86_64

     

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       # Create a script for running an Ubuntu 20.04 VM

     

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       makeImageTestScript diskImages.ubuntu2004x86_64

     

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       ```

     

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       ## `vmTools.diskImageFuns` {#vm-tools-diskImageFuns}

     

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       A set of functions that build a predefined set of minimal Linux distributions images.

     

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       ### Images

     

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       * Fedora

     

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         * `fedora26x86_64`

     

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         * `fedora27x86_64`

     

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       * CentOS

     

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         * `centos6i386`

     

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         * `centos6x86_64`

     

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         * `centos7x86_64`

     

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       * Ubuntu

     

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         * `ubuntu1404i386`

     

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         * `ubuntu1404x86_64`

     

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         * `ubuntu1604i386`

     

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         * `ubuntu1604x86_64`

     

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         * `ubuntu1804i386`

     

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         * `ubuntu1804x86_64`

     

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         * `ubuntu2004i386`

     

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         * `ubuntu2004x86_64`

     

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       * Debian

     

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         * `debian9i386`

     

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         * `debian9x86_64`

     

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         * `debian10i386`

     

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         * `debian10x86_64`

     

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       ### Attributes

     

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       * `size` (optional, defaults to `4096`). The size of the image, in megabytes.

     

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       * `extraPackages` (optional). A list names of additional packages from the distribution that should be included in the

     

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         image.

     

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       ### Examples

     

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       ```nix

     

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       # 8G image containing Firefox in addition to the default packages.

     

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       diskImageFuns.ubuntu2004x86_64 { extraPackages = [ "firefox" ]; size = 8192; }

     

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       ```

     

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       ## `vmTools.diskImageExtraFuns` {#vm-tools-diskImageExtraFuns}

     

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       Shorthand for `vmTools.diskImageFuns.<attr> { extraPackages = ... }`.

     

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       ## `vmTools.diskImages` {#vm-tools-diskImages}

     

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       Shorthand for `vmTools.diskImageFuns.<attr> { }`.

doc/manpage-urls.json

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         "mpd(1)": "https://mpd.readthedocs.io/en/latest/mpd.1.html",

     

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         "mpd.conf(5)": "https://mpd.readthedocs.io/en/latest/mpd.conf.5.html",

     

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         "nix.conf(5)": "https://nixos.org/manual/nix/stable/command-ref/conf-file.html",

     

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         "journald.conf(5)": "https://www.freedesktop.org/software/systemd/man/journald.conf.html",

     

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         "logind.conf(5)": "https://www.freedesktop.org/software/systemd/man/logind.conf.html",

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         "mpd(1)": "https://mpd.readthedocs.io/en/latest/mpd.1.html",

     

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         "mpd.conf(5)": "https://mpd.readthedocs.io/en/latest/mpd.conf.5.html",

     

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         "nix.conf(5)": "https://nixos.org/manual/nix/stable/command-ref/conf-file.html",

     

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         "mount(5)": "https://linux.die.net/man/8/mount",

     

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         "journald.conf(5)": "https://www.freedesktop.org/software/systemd/man/journald.conf.html",

     

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         "logind.conf(5)": "https://www.freedesktop.org/software/systemd/man/logind.conf.html",