9c722e474d
- Added a backdoor option to the interactive run-vms script. This allows me to intergrate the virtual network approach with Disnix
- Small documentation fixes
Some explanation:
The nixos-build-vms command line tool can be used to build a virtual network of a network.nix specification.
For example, a network configuration (network.nix) could look like this:
{
test1 =
{pkgs, config, ...}:
{
services.openssh.enable = true;
...
};
test2 =
{pkgs, config, ...}:
{
services.openssh.enable = true;
services.xserver.enable = true;
}
;
}
By typing the following instruction:
$ nixos-build-vms -n network.nix
a virtual network is built, which can be started by typing:
$ ./result/bin/run-vms
It is also possible to enable a backdoor. In this case *.socket files are stored in the current directory
which can be used by the end-user to invoke remote instruction on a VM in the network through a Unix
domain socket.
For example by building the network with the following instructions:
$ nixos-build-vms -n network.nix --use-backdoor
and launching the virtual network:
$ ./result/bin/run-vms
You can find two socket files in your current directory, namely: test1.socket and test2.socket.
These Unix domain sockets can be used to remotely administer the test1 and test2 machine
in the virtual network.
For example by running:
$ socat ./test1.socket stdio
ls /root
You can retrieve the contents of the /root directory of the virtual machine with identifier test1
svn path=/nixos/trunk/; revision=24410
67 lines
1.4 KiB
Bash
67 lines
1.4 KiB
Bash
#! @shell@ -e
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# Shows the usage of this command to the user
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showUsage()
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{
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echo "Usage: $0 -n network_expr -i infrastructure_expr"
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echo "Options:"
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echo
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echo "-n,--network Network Nix expression which captures properties of machines in the network"
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echo "--use-backdoor Indicates that the backdoor must be enabled so that the VMs can be accessed through a UNIX domain socket"
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echo "--show-trace Shows the output trace"
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echo "-h,--help Shows the usage of this command"
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}
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# Parse valid argument options
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PARAMS=`getopt -n $0 -o n:h -l network:,use-backdoor,show-trace,help -- "$@"`
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if [ $? != 0 ]
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then
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showUsage
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exit 1
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fi
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eval set -- "$PARAMS"
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# Evaluate valid options
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while [ "$1" != "--" ]
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do
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case "$1" in
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-n|--network)
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networkExpr=`readlink -f $2`
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;;
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--use-backdoor)
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useBackdoorArg="--arg useBackdoor true"
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;;
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--show-trace)
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showTraceArg="--show-trace"
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;;
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-h|--help)
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showUsage
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exit 0
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;;
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esac
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shift
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done
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# Validate the given options
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if [ "$networkExpr" = "" ]
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then
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echo "ERROR: A network expression must be specified!" >&2
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exit 1
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fi
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if [ -z "$NIXOS" ]
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then
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NIXOS=/etc/nixos/nixos
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fi
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# Build a network of VMs
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nix-build $NIXOS/modules/installer/tools/nixos-build-vms/build-vms.nix --argstr networkExpr $networkExpr --argstr nixos $NIXOS --argstr nixpkgs $NIXPKGS_ALL $useBackdoorArg $showTraceArg
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