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|
# Module for Nova, a.k.a. OpenStack Compute.
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.virtualisation.nova;
nova = pkgs.nova;
novaConf = pkgs.writeText "nova.conf"
''
--nodaemon
--verbose
${cfg.extraConfig}
'';
in
{
###### interface
options = {
virtualisation.nova.enableSingleNode =
mkOption {
default = false;
description =
''
This option enables Nova, also known as OpenStack Compute,
a cloud computing system, as a single-machine
installation. That is, all of Nova's components are
enabled on this machine, using SQLite as Nova's database.
This is useful for evaluating and experimenting with Nova.
However, for a real cloud computing environment, you'll
want to enable some of Nova's services on other machines,
and use a database such as MySQL.
'';
};
virtualisation.nova.extraConfig =
mkOption {
default = "";
description =
''
Additional text appended to <filename>nova.conf</filename>,
the main Nova configuration file.
'';
};
};
###### implementation
config = mkIf cfg.enableSingleNode {
environment.systemPackages = [ nova pkgs.euca2ools pkgs.novaclient ];
environment.etc =
[ { source = novaConf;
target = "nova/nova.conf";
}
];
# Nova requires libvirtd and RabbitMQ.
virtualisation.libvirtd.enable = true;
services.rabbitmq.enable = true;
# `qemu-nbd' required the `nbd' kernel module.
boot.kernelModules = [ "nbd" ];
system.activationScripts.nova =
''
mkdir -m 755 -p /var/lib/nova
mkdir -m 755 -p /var/lib/nova/networks
mkdir -m 700 -p /var/lib/nova/instances
mkdir -m 700 -p /var/lib/nova/keys
# Allow the CA certificate generation script (called by
# nova-api) to work.
mkdir -m 700 -p /var/lib/nova/CA /var/lib/nova/CA/private
# Initialise the SQLite database.
${nova}/bin/nova-manage db sync
'';
# `nova-api' receives and executes external client requests from
# tools such as euca2ools. It listens on port 8773 (XML) and 8774
# (JSON).
jobs.nova_api =
{ name = "nova-api";
description = "Nova API service";
startOn = "ip-up";
# `openssl' is required to generate the CA. `openssh' is
# required to generate key pairs.
path = [ pkgs.openssl pkgs.openssh pkgs.bash ];
respawn = false;
exec = "${nova}/bin/nova-api --flagfile=${novaConf} --api_paste_config=${nova}/etc/nova/api-paste.ini";
};
# `nova-objectstore' is a simple image server. Useful if you're
# not running the OpenStack Imaging Service (Swift). It serves
# images placed in /var/lib/nova/images/.
jobs.nova_objectstore =
{ name = "nova-objectstore";
description = "Nova Simple Object Store Service";
startOn = "ip-up";
preStart =
''
mkdir -m 700 -p /var/lib/nova/images
'';
exec = "${nova}/bin/nova-objectstore --flagfile=${novaConf}";
};
# `nova-scheduler' schedules VM execution requests.
jobs.nova_scheduler =
{ name = "nova-scheduler";
description = "Nova Scheduler Service";
startOn = "ip-up";
exec = "${nova}/bin/nova-scheduler --flagfile=${novaConf}";
};
# `nova-compute' starts and manages virtual machines.
jobs.nova_compute =
{ name = "nova-compute";
description = "Nova Compute Service";
startOn = "ip-up";
path =
[ pkgs.sudo pkgs.vlan pkgs.nettools pkgs.iptables pkgs.qemu_kvm
pkgs.e2fsprogs pkgs.utillinux pkgs.multipath_tools pkgs.iproute
pkgs.bridge_utils
];
exec = "${nova}/bin/nova-compute --flagfile=${novaConf}";
};
# `nova-network' manages networks and allocates IP addresses.
jobs.nova_network =
{ name = "nova-network";
description = "Nova Network Service";
startOn = "ip-up";
path =
[ pkgs.sudo pkgs.vlan pkgs.dnsmasq pkgs.nettools pkgs.iptables
pkgs.iproute pkgs.bridge_utils pkgs.radvd
];
exec = "${nova}/bin/nova-network --flagfile=${novaConf}";
};
};
}
|