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# vi: ts=4 expandtab
#
# Copyright (C) 2016 Canonical Ltd.
#
# Author: Wesley Wiedenmeier <wesley.wiedenmeier@canonical.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3, as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
This module initializes lxd using 'lxd init'
Example config:
#cloud-config
lxd:
init:
network_address: <ip addr>
network_port: <port>
storage_backend: <zfs/dir>
storage_create_device: <dev>
storage_create_loop: <size>
storage_pool: <name>
trust_password: <password>
bridge:
mode: <new, existing or none>
name: <name>
ipv4_address: <ip addr>
ipv4_netmask: <cidr>
ipv4_dhcp_first: <ip addr>
ipv4_dhcp_last: <ip addr>
ipv4_dhcp_leases: <size>
ipv4_nat: <bool>
ipv6_address: <ip addr>
ipv6_netmask: <cidr>
ipv6_nat: <bool>
domain: <domain>
"""
from cloudinit import util
def handle(name, cfg, cloud, log, args):
# Get config
lxd_cfg = cfg.get('lxd')
if not lxd_cfg:
log.debug("Skipping module named %s, not present or disabled by cfg",
name)
return
if not isinstance(lxd_cfg, dict):
log.warn("lxd config must be a dictionary. found a '%s'",
type(lxd_cfg))
return
# Grab the configuration
init_cfg = lxd_cfg.get('init')
if not isinstance(init_cfg, dict):
log.warn("lxd/init config must be a dictionary. found a '%s'",
type(init_cfg))
init_cfg = {}
bridge_cfg = lxd_cfg.get('bridge')
if not isinstance(bridge_cfg, dict):
log.warn("lxd/bridge config must be a dictionary. found a '%s'",
type(bridge_cfg))
bridge_cfg = {}
# Install the needed packages
packages = []
if not util.which("lxd"):
packages.append('lxd')
if init_cfg.get("storage_backend") == "zfs" and not util.which('zfs'):
packages.append('zfs')
if len(packages):
try:
cloud.distro.install_packages(packages)
except util.ProcessExecutionError as exc:
log.warn("failed to install packages %s: %s", packages, exc)
return
# Set up lxd if init config is given
if init_cfg:
init_keys = (
'network_address', 'network_port', 'storage_backend',
'storage_create_device', 'storage_create_loop',
'storage_pool', 'trust_password')
cmd = ['lxd', 'init', '--auto']
for k in init_keys:
if init_cfg.get(k):
cmd.extend(["--%s=%s" %
(k.replace('_', '-'), str(init_cfg[k]))])
util.subp(cmd)
# Set up lxd-bridge if bridge config is given
dconf_comm = "debconf-communicate"
if bridge_cfg and util.which(dconf_comm):
debconf = bridge_to_debconf(bridge_cfg)
# Update debconf database
try:
log.debug("Setting lxd debconf via " + dconf_comm)
data = "\n".join(["set %s %s" % (k, v)
for k, v in debconf.items()]) + "\n"
util.subp(['debconf-communicate'], data)
except Exception:
util.logexc(log, "Failed to run '%s' for lxd with" % dconf_comm)
# Remove the existing configuration file (forces re-generation)
util.del_file("/etc/default/lxd-bridge")
# Run reconfigure
log.debug("Running dpkg-reconfigure for lxd")
util.subp(['dpkg-reconfigure', 'lxd',
'--frontend=noninteractive'])
elif bridge_cfg:
raise RuntimeError(
"Unable to configure lxd bridge without %s." + dconf_comm)
def bridge_to_debconf(bridge_cfg):
debconf = {}
if bridge_cfg.get("mode") == "none":
debconf["lxd/setup-bridge"] = "false"
debconf["lxd/bridge-name"] = ""
elif bridge_cfg.get("mode") == "existing":
debconf["lxd/setup-bridge"] = "false"
debconf["lxd/use-existing-bridge"] = "true"
debconf["lxd/bridge-name"] = bridge_cfg.get("name")
elif bridge_cfg.get("mode") == "new":
debconf["lxd/setup-bridge"] = "true"
if bridge_cfg.get("name"):
debconf["lxd/bridge-name"] = bridge_cfg.get("name")
if bridge_cfg.get("ipv4_address"):
debconf["lxd/bridge-ipv4"] = "true"
debconf["lxd/bridge-ipv4-address"] = \
bridge_cfg.get("ipv4_address")
debconf["lxd/bridge-ipv4-netmask"] = \
bridge_cfg.get("ipv4_netmask")
debconf["lxd/bridge-ipv4-dhcp-first"] = \
bridge_cfg.get("ipv4_dhcp_first")
debconf["lxd/bridge-ipv4-dhcp-last"] = \
bridge_cfg.get("ipv4_dhcp_last")
debconf["lxd/bridge-ipv4-dhcp-leases"] = \
bridge_cfg.get("ipv4_dhcp_leases")
debconf["lxd/bridge-ipv4-nat"] = \
bridge_cfg.get("ipv4_nat", "true")
if bridge_cfg.get("ipv6_address"):
debconf["lxd/bridge-ipv6"] = "true"
debconf["lxd/bridge-ipv6-address"] = \
bridge_cfg.get("ipv6_address")
debconf["lxd/bridge-ipv6-netmask"] = \
bridge_cfg.get("ipv6_netmask")
debconf["lxd/bridge-ipv6-nat"] = \
bridge_cfg.get("ipv6_nat", "false")
if bridge_cfg.get("domain"):
debconf["lxd/bridge-domain"] = bridge_cfg.get("domain")
else:
raise Exception("invalid bridge mode \"%s\"" % bridge_cfg.get("mode"))
return debconf
|
