bundlewrap/bundles/unbound/metadata.py

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defaults = {
'apt': {
'packages': {
'unbound': {},
'unbound-anchor': {},
},
},
'cron': {
'unbound_refresh_root-hints': '{} {} * * {} root wget -q -O/etc/unbound/root-hints.txt https://www.internic.net/domain/named.root'.format(
node.magic_number%60,
node.magic_number%24,
node.magic_number%7,
),
},
'nameservers': {
'127.0.0.1',
},
'unbound': {
'max_ttl': 3600,
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'cache_size': '512M',
},
}
@metadata_reactor.provides(
'unbound/threads',
'unbound/cache_slabs',
)
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def cpu_cores_to_config_values(metadata):
num_cpus = metadata.get('vm/cpu', 1)
return {
'unbound': {
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'threads': num_cpus*2,
'cache_slabs': 2**(num_cpus-1).bit_length(),
},
}
@metadata_reactor.provides(
'iptables/bundle_rules/unbound',
)
def iptables(metadata):
identifiers = metadata.get('unbound/restrict-to', set())
rules = set()
if identifiers:
for identifier in sorted(identifiers):
resolved = repo.libs.tools.resolve_identifier(repo, identifier)
for address in resolved['ipv4']:
rules.add(f'iptables -A INPUT -p tcp -s {address} --dport 53 -j ACCEPT')
rules.add(f'iptables -A INPUT -p udp -s {address} --dport 53 -j ACCEPT')
for address in resolved['ipv6']:
rules.add(f'ip6tables -A INPUT -p tcp -s {address} --dport 53 -j ACCEPT')
rules.add(f'ip6tables -A INPUT -p udp -s {address} --dport 53 -j ACCEPT')
return {
'iptables': {
'bundle_rules': {
'unbound': list(sorted(rules)),
},
},
}