def _write_network(self, settings):
entries = net_util.translate_network(settings)
nameservers = []
searchdomains = []
dev_names = entries.keys()
for (device, info) in entries.items():
# Skip the loopback interface.
if device.startswith('lo'):
continue
dev = self.getnetifname(device)
LOG.info('Configuring interface %s', dev)
if info.get('bootproto') == 'static':
LOG.debug('Configuring dev %s with %s / %s', dev,
info.get('address'), info.get('netmask'))
# Configure an ipv4 address.
ifconfig = (info.get('address') + ' netmask ' +
info.get('netmask'))
# Configure the gateway.
self.updatercconf('defaultrouter', info.get('gateway'))
if 'dns-nameservers' in info:
nameservers.extend(info['dns-nameservers'])
if 'dns-search' in info:
searchdomains.extend(info['dns-search'])
else:
ifconfig = 'DHCP'
self.updatercconf('ifconfig_' + dev, ifconfig)
# Try to read the /etc/resolv.conf or just start from scratch if that
# fails.
try:
resolvconf = ResolvConf(util.load_file(self.resolv_conf_fn))
resolvconf.parse()
except IOError:
util.logexc(LOG, "Failed to parse %s, use new empty file",
self.resolv_conf_fn)
resolvconf = ResolvConf('')
resolvconf.parse()
# Add some nameservers
for server in nameservers:
try:
resolvconf.add_nameserver(server)
except ValueError:
util.logexc(LOG, "Failed to add nameserver %s", server)
# And add any searchdomains.
for domain in searchdomains:
try:
resolvconf.add_search_domain(domain)
except ValueError:
util.logexc(LOG, "Failed to add search domain %s", domain)
util.write_file(self.resolv_conf_fn, str(resolvconf), 0o644)
return dev_names
def update_resolve_conf_file(fn, dns_servers, search_servers):
try:
r_conf = ResolvConf(util.load_file(fn))
r_conf.parse()
empty = False
except IOError:
LOG.info("Failed at parsing %s creating an empty instance", fn)
r_conf = ResolvConf('')
r_conf.parse()
empty = True
if dns_servers:
for s in dns_servers:
try:
r_conf.add_nameserver(s)
empty = False
except ValueError:
util.logexc(LOG, "Failed at adding nameserver %s", s)
if search_servers:
for s in search_servers:
try:
r_conf.add_search_domain(s)
except ValueError:
util.logexc(LOG, "Failed at adding search domain %s", s)
if empty is False:
write_resolv_conf_file(fn, r_conf)
def _resolve_conf(self, settings):
nameservers = settings.dns_nameservers
searchdomains = settings.dns_searchdomains
for interface in settings.iter_interfaces():
for subnet in interface.get("subnets", []):
if "dns_nameservers" in subnet:
nameservers.extend(subnet["dns_nameservers"])
if "dns_search" in subnet:
searchdomains.extend(subnet["dns_search"])
# Try to read the /etc/resolv.conf or just start from scratch if that
# fails.
try:
resolvconf = ResolvConf(
util.load_file(
subp.target_path(self.target, self.resolv_conf_fn)
)
)
resolvconf.parse()
except IOError:
util.logexc(
LOG,
"Failed to parse %s, use new empty file",
subp.target_path(self.target, self.resolv_conf_fn),
)
resolvconf = ResolvConf("")
resolvconf.parse()
# Add some nameservers
for server in set(nameservers):
try:
resolvconf.add_nameserver(server)
except ValueError:
util.logexc(LOG, "Failed to add nameserver %s", server)
# And add any searchdomains.
for domain in set(searchdomains):
try:
resolvconf.add_search_domain(domain)
except ValueError:
util.logexc(LOG, "Failed to add search domain %s", domain)
util.write_file(
subp.target_path(self.target, self.resolv_conf_fn),
str(resolvconf),
0o644,
)
def update_resolve_conf_file(fn, dns_servers, search_servers):
try:
r_conf = ResolvConf(util.load_file(fn))
r_conf.parse()
except IOError:
util.logexc(LOG, "Failed at parsing %s reverting to an empty "
"instance", fn)
r_conf = ResolvConf('')
r_conf.parse()
if dns_servers:
for s in dns_servers:
try:
r_conf.add_nameserver(s)
except ValueError:
util.logexc(LOG, "Failed at adding nameserver %s", s)
if search_servers:
for s in search_servers:
try:
r_conf.add_search_domain(s)
except ValueError:
util.logexc(LOG, "Failed at adding search domain %s", s)
util.write_file(fn, str(r_conf), 0o644)
def remove_resolve_conf_file(fn):
r_conf = ResolvConf('')
r_conf.parse()
write_resolv_conf_file(fn, r_conf)