63 lines
1.7 KiB
Go
63 lines
1.7 KiB
Go
/*
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Copyright 2021 The Dapr Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package kubernetes
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import (
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"fmt"
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"github.com/dapr/components-contrib/nameresolution"
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"github.com/dapr/kit/config"
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"github.com/dapr/kit/logger"
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)
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const (
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DefaultClusterDomain = "cluster.local"
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ClusterDomainKey = "clusterDomain"
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)
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type resolver struct {
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logger logger.Logger
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clusterDomain string
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}
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// NewResolver creates Kubernetes name resolver.
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func NewResolver(logger logger.Logger) nameresolution.Resolver {
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return &resolver{
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logger: logger,
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clusterDomain: DefaultClusterDomain,
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}
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}
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// Init initializes Kubernetes name resolver.
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func (k *resolver) Init(metadata nameresolution.Metadata) error {
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configInterface, err := config.Normalize(metadata.Configuration)
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if err != nil {
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return err
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}
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if config, ok := configInterface.(map[string]string); ok {
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clusterDomain := config[ClusterDomainKey]
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if clusterDomain != "" {
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k.clusterDomain = clusterDomain
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}
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}
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return nil
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}
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// ResolveID resolves name to address in Kubernetes.
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func (k *resolver) ResolveID(req nameresolution.ResolveRequest) (string, error) {
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// Dapr requires this formatting for Kubernetes services
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return fmt.Sprintf("%s-dapr.%s.svc.%s:%d", req.ID, req.Namespace, k.clusterDomain, req.Port), nil
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}
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