from typing import TYPE_CHECKING
if TYPE_CHECKING:
from render import Render
try:
from .error import RenderError
from .validations import allowed_dns_opt_or_raise
except ImportError:
from error import RenderError
from validations import allowed_dns_opt_or_raise
class Dns:
def __init__(self, render_instance: "Render"):
self._render_instance = render_instance
self._dns_options: set[str] = set()
self._dns_searches: set[str] = set()
self._dns_nameservers: set[str] = set()
self._auto_add_dns_opts_from_values()
self._auto_add_dns_searches_from_values()
self._auto_add_dns_nameservers_from_values()
def _get_dns_opt_keys(self):
return [self._get_key_from_opt(opt) for opt in self._dns_options]
def _get_key_from_opt(self, opt):
return opt.split(":")[0]
def _auto_add_dns_opts_from_values(self):
values = self._render_instance.values
for dns_opt in values.get("network", {}).get("dns_opts", []):
self.add_dns_opt(dns_opt)
def _auto_add_dns_searches_from_values(self):
values = self._render_instance.values
for dns_search in values.get("network", {}).get("dns_searches", []):
self.add_dns_search(dns_search)
def _auto_add_dns_nameservers_from_values(self):
values = self._render_instance.values
for dns_nameserver in values.get("network", {}).get("dns_nameservers", []):
self.add_dns_nameserver(dns_nameserver)
def add_dns_search(self, dns_search):
if dns_search in self._dns_searches:
raise RenderError(f"DNS Search [{dns_search}] already added")
self._dns_searches.add(dns_search)
def add_dns_nameserver(self, dns_nameserver):
if dns_nameserver in self._dns_nameservers:
raise RenderError(f"DNS Nameserver [{dns_nameserver}] already added")
self._dns_nameservers.add(dns_nameserver)
def add_dns_opt(self, dns_opt):
# eg attempts:3
key = allowed_dns_opt_or_raise(self._get_key_from_opt(dns_opt))
if key in self._get_dns_opt_keys():
raise RenderError(f"DNS Option [{key}] already added")
self._dns_options.add(dns_opt)
def has_dns_opts(self):
return len(self._dns_options) > 0
def has_dns_searches(self):
return len(self._dns_searches) > 0
def has_dns_nameservers(self):
return len(self._dns_nameservers) > 0
def render_dns_searches(self):
return sorted(self._dns_searches)
def render_dns_opts(self):
return sorted(self._dns_options)
def render_dns_nameservers(self):
return sorted(self._dns_nameservers)