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|
{
config,
lib,
pkgs,
...
}:
let
# qemu 9.1.2 no longer supports strings being passed instead of some
# integer parameters. incus already has the fix, but it hasn't made it
# into a release yet.
# see: https://github.com/lxc/incus/issues/1522
incusPatch = pkgs.fetchpatch {
name = "1531.patch";
url = "https://github.com/lxc/incus/pull/1531.patch";
sha256 = "sha256-tM/+JRH0OwR3bM8gk3yNo9SSAEMqpS2HP+OzooV3DJY=";
};
incus = pkgs.incus.overrideAttrs (attrs: {
patches = (attrs.patches or [ ]) ++ [ incusPatch ];
});
toYAML = lib.generators.toYAML { };
cloudInitConfiguration = {
users = [
{
name = "admin";
groups = "users";
sudo = "ALL=(ALL) NOPASSWD:ALL";
plain_text_passwd = "example";
lock_passwd = false;
}
];
# ssh configuration
allow_public_ssh_keys = true;
disable_root = true;
packages = [ "openssh-server" ];
runcmd = [
[
"systemctl"
"enable"
"ssh.service"
]
];
};
in
{
networking.firewall = {
# needed so that the nixos firewall does not block
# DHCP+DNS requests from incus, and to prevent conflicts
# between the two firewalls.
trustedInterfaces = [ "incusbr0" ];
allowedTCPPorts = [ 23 ];
};
# needed so inscus instances can connect to the proxy.
boot.kernelModules = [ "br_netfilter" ];
virtualisation.incus = {
enable = true;
package = incus;
preseed = {
networks = [
{
config = {
"ipv4.address" = "10.0.100.1/24";
"ipv4.nat" = "true";
};
name = "incusbr0";
type = "bridge";
}
];
profiles = [
# this default profile gets applied to all
# new instances without an explicitly set profile.
{
name = "default";
config = { };
devices = {
eth0 = {
name = "eth0";
network = "incusbr0";
type = "nic";
};
root = {
path = "/";
pool = "default";
size = "35GiB";
type = "disk";
};
};
}
# this profile is the one we want to apply to an ubuntu example vm.
# it is provisioned with a static ipv4 (for nat-ted proxy)
# and cloud-init configuration
{
name = "vm-1";
# config applied to new instances,
# this is how we can best control
# vm provisioning semi-declaratively.
# for options, see: https://linuxcontainers.org/incus/docs/main/reference/instance_options/
config = {
# `vendor` is usually for defaults, but it doesn't actually matter here.
# NOTE: cloud-init requires either the incus-agent to be running,
# or that the image is a special cloud image. i.e. `images:ubuntu/22.04/cloud`.
"cloud-init.vendor-data" = ''
#cloud-config
${toYAML cloudInitConfiguration}
'';
};
devices = {
eth0 = {
name = "eth0";
network = "incusbr0";
type = "nic";
# this is necessary for our nat proxy configuration.
# see: https://linuxcontainers.org/incus/docs/main/reference/devices_proxy/#nat-mode
"ipv4.address" = "10.0.100.123";
};
proxy = {
type = "proxy";
listen = "tcp:127.0.0.1:2222";
connect = "tcp:0.0.0.0:22";
nat = true;
};
root = {
path = "/";
pool = "default";
size = "35GiB";
type = "disk";
};
};
}
];
storage_pools = [
{
config = {
source = "/var/lib/incus/storage-pools/default";
};
driver = "dir";
name = "default";
}
];
};
};
# `incus-admin` essentially gives you root access anyway,
# let users in `wheel` use it freely.
users.groups."incus-admin".members = config.users.groups."wheel".members;
}
|
