61 lines
2.1 KiB
Go
61 lines
2.1 KiB
Go
/*
|
|
*
|
|
* Copyright 2018 gRPC authors.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*
|
|
*/
|
|
|
|
// Package dns implements a dns resolver to be installed as the default resolver
|
|
// in grpc.
|
|
package dns
|
|
|
|
import (
|
|
"time"
|
|
|
|
"google.golang.org/grpc/internal/resolver/dns"
|
|
"google.golang.org/grpc/resolver"
|
|
)
|
|
|
|
// SetResolvingTimeout sets the maximum duration for DNS resolution requests.
|
|
//
|
|
// This function affects the global timeout used by all channels using the DNS
|
|
// name resolver scheme.
|
|
//
|
|
// It must be called only at application startup, before any gRPC calls are
|
|
// made. Modifying this value after initialization is not thread-safe.
|
|
//
|
|
// The default value is 30 seconds. Setting the timeout too low may result in
|
|
// premature timeouts during resolution, while setting it too high may lead to
|
|
// unnecessary delays in service discovery. Choose a value appropriate for your
|
|
// specific needs and network environment.
|
|
func SetResolvingTimeout(timeout time.Duration) {
|
|
dns.ResolvingTimeout = timeout
|
|
}
|
|
|
|
// NewBuilder creates a dnsBuilder which is used to factory DNS resolvers.
|
|
//
|
|
// Deprecated: import grpc and use resolver.Get("dns") instead.
|
|
func NewBuilder() resolver.Builder {
|
|
return dns.NewBuilder()
|
|
}
|
|
|
|
// SetMinResolutionInterval sets the default minimum interval at which DNS
|
|
// re-resolutions are allowed. This helps to prevent excessive re-resolution.
|
|
//
|
|
// It must be called only at application startup, before any gRPC calls are
|
|
// made. Modifying this value after initialization is not thread-safe.
|
|
func SetMinResolutionInterval(d time.Duration) {
|
|
dns.MinResolutionInterval = d
|
|
}
|