Resolver¶

config.core.v3.DnsResolverOptions¶

Configuration of DNS resolver option flags which control the behavior of the DNS resolver.

{
  "use_tcp_for_dns_lookups": "...",
  "no_default_search_domain": "..."
}

use_tcp_for_dns_lookups: (bool) Use TCP for all DNS queries instead of the default protocol UDP. Setting this value causes failure if the envoy.restart_features.use_apple_api_for_dns_lookups runtime value is true during server startup. Apple’s API only uses UDP for DNS resolution.

no_default_search_domain: (bool) Do not use the default search domains; only query hostnames as-is or as aliases.

DNS resolution configuration which includes the underlying dns resolver addresses and options.

{
  "resolvers": [],
  "dns_resolver_options": "{...}"
}

resolvers: (repeated config.core.v3.Address, REQUIRED) A list of dns resolver addresses. If specified, the DNS client library will perform resolution via the underlying DNS resolvers. Otherwise, the default system resolvers (e.g., /etc/resolv.conf) will be used. Setting this value causes failure if the envoy.restart_features.use_apple_api_for_dns_lookups runtime value is true during server startup. Apple’s API only allows overriding DNS resolvers via system settings.

dns_resolver_options: (config.core.v3.DnsResolverOptions) Configuration of DNS resolver option flags which control the behavior of the DNS resolver.