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dns_filter: support SRV records (#12085)

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The filter responds to the SRV requests identifying the server targets, and address records for each target.

Signed-off-by: Alvin Baptiste <alvinsb@gmail.com>

Mirrored from https://github.com/envoyproxy/envoy @ d6b9cf7fce5065062940248f254d66cf77770ee9
master-ci-test
data-plane-api(CircleCI) 4 years ago
parent 46bf7af76c
commit 2365febc44
2 changed files with 150 additions and 4 deletions
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  1. 71
      envoy/data/dns/v3/dns_table.proto
  2. 83
      envoy/data/dns/v4alpha/dns_table.proto

71
envoy/data/dns/v3/dns_table.proto
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@ -39,8 +39,70 @@ message DnsTable {
}];
}
// This message type is extensible and can contain a list of addresses, clusters or
// dictate a different method for resolving the addresses for an endpoint
// Specify the service protocol using a numeric or string value
message DnsServiceProtocol {
oneof protocol_config {
option (validate.required) = true;
// Specify the protocol number for the service. Envoy will try to resolve the number to
// the protocol name. For example, 6 will resolve to "tcp". Refer to:
// https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml
// for protocol names and numbers
uint32 number = 1 [(validate.rules).uint32 = {lt: 255}];
// Specify the protocol name for the service.
string name = 2 [(validate.rules).string = {min_len: 1 well_known_regex: HTTP_HEADER_NAME}];
}
}
// Specify the target for a given DNS service
// [#next-free-field: 6]
message DnsServiceTarget {
// Specify the name of the endpoint for the Service. The name is a hostname or a cluster
oneof endpoint_type {
option (validate.required) = true;
// Use a resolvable hostname as the endpoint for a service.
string host_name = 1
[(validate.rules).string = {min_len: 1 well_known_regex: HTTP_HEADER_NAME}];
// Use a cluster name as the endpoint for a service.
string cluster_name = 2
[(validate.rules).string = {min_len: 1 well_known_regex: HTTP_HEADER_NAME}];
}
// The priority of the service record target
uint32 priority = 3 [(validate.rules).uint32 = {lt: 65536}];
// The weight of the service record target
uint32 weight = 4 [(validate.rules).uint32 = {lt: 65536}];
// The port to which the service is bound. This value is optional if the target is a
// cluster. Setting port to zero in this case makes the filter use the port value
// from the cluster host
uint32 port = 5 [(validate.rules).uint32 = {lt: 65536}];
}
// This message defines a service selection record returned for a service query in a domain
message DnsService {
// The name of the service without the protocol or domain name
string service_name = 1;
// The service protocol. This can be specified as a string or the numeric value of the protocol
DnsServiceProtocol protocol = 2;
// The service entry time to live. This is independent from the DNS Answer record TTL
google.protobuf.Duration ttl = 3 [(validate.rules).duration = {gte {seconds: 1}}];
// The list of targets hosting the service
repeated DnsServiceTarget targets = 4 [(validate.rules).repeated = {min_items: 1}];
}
// Define a list of service records for a given service
message DnsServiceList {
repeated DnsService services = 1 [(validate.rules).repeated = {min_items: 1}];
}
message DnsEndpoint {
option (udpa.annotations.versioning).previous_message_type =
"envoy.data.dns.v2alpha.DnsTable.DnsEndpoint";
@ -48,9 +110,14 @@ message DnsTable {
oneof endpoint_config {
option (validate.required) = true;
// Define a list of addresses to return for the specified endpoint
AddressList address_list = 1;
// Define a cluster whose addresses are returned for the specified endpoint
string cluster_name = 2;
// Define a DNS Service List for the specified endpoint
DnsServiceList service_list = 3;
}
}

83
envoy/data/dns/v4alpha/dns_table.proto
Unescape View File

@ -39,8 +39,82 @@ message DnsTable {
}];
}
// This message type is extensible and can contain a list of addresses, clusters or
// dictate a different method for resolving the addresses for an endpoint
// Specify the service protocol using a numeric or string value
message DnsServiceProtocol {
option (udpa.annotations.versioning).previous_message_type =
"envoy.data.dns.v3.DnsTable.DnsServiceProtocol";
oneof protocol_config {
option (validate.required) = true;
// Specify the protocol number for the service. Envoy will try to resolve the number to
// the protocol name. For example, 6 will resolve to "tcp". Refer to:
// https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml
// for protocol names and numbers
uint32 number = 1 [(validate.rules).uint32 = {lt: 255}];
// Specify the protocol name for the service.
string name = 2 [(validate.rules).string = {min_len: 1 well_known_regex: HTTP_HEADER_NAME}];
}
}
// Specify the target for a given DNS service
// [#next-free-field: 6]
message DnsServiceTarget {
option (udpa.annotations.versioning).previous_message_type =
"envoy.data.dns.v3.DnsTable.DnsServiceTarget";
// Specify the name of the endpoint for the Service. The name is a hostname or a cluster
oneof endpoint_type {
option (validate.required) = true;
// Use a resolvable hostname as the endpoint for a service.
string host_name = 1
[(validate.rules).string = {min_len: 1 well_known_regex: HTTP_HEADER_NAME}];
// Use a cluster name as the endpoint for a service.
string cluster_name = 2
[(validate.rules).string = {min_len: 1 well_known_regex: HTTP_HEADER_NAME}];
}
// The priority of the service record target
uint32 priority = 3 [(validate.rules).uint32 = {lt: 65536}];
// The weight of the service record target
uint32 weight = 4 [(validate.rules).uint32 = {lt: 65536}];
// The port to which the service is bound. This value is optional if the target is a
// cluster. Setting port to zero in this case makes the filter use the port value
// from the cluster host
uint32 port = 5 [(validate.rules).uint32 = {lt: 65536}];
}
// This message defines a service selection record returned for a service query in a domain
message DnsService {
option (udpa.annotations.versioning).previous_message_type =
"envoy.data.dns.v3.DnsTable.DnsService";
// The name of the service without the protocol or domain name
string service_name = 1;
// The service protocol. This can be specified as a string or the numeric value of the protocol
DnsServiceProtocol protocol = 2;
// The service entry time to live. This is independent from the DNS Answer record TTL
google.protobuf.Duration ttl = 3 [(validate.rules).duration = {gte {seconds: 1}}];
// The list of targets hosting the service
repeated DnsServiceTarget targets = 4 [(validate.rules).repeated = {min_items: 1}];
}
// Define a list of service records for a given service
message DnsServiceList {
option (udpa.annotations.versioning).previous_message_type =
"envoy.data.dns.v3.DnsTable.DnsServiceList";
repeated DnsService services = 1 [(validate.rules).repeated = {min_items: 1}];
}
message DnsEndpoint {
option (udpa.annotations.versioning).previous_message_type =
"envoy.data.dns.v3.DnsTable.DnsEndpoint";
@ -48,9 +122,14 @@ message DnsTable {
oneof endpoint_config {
option (validate.required) = true;
// Define a list of addresses to return for the specified endpoint
AddressList address_list = 1;
// Define a cluster whose addresses are returned for the specified endpoint
string cluster_name = 2;
// Define a DNS Service List for the specified endpoint
DnsServiceList service_list = 3;
}
}

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