126 lines
3.7 KiB
Go
126 lines
3.7 KiB
Go
/*
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Copyright 2016 The Kubernetes 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 kubectl
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import (
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"fmt"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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federationapi "k8s.io/kubernetes/federation/apis/federation/v1beta1"
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"k8s.io/kubernetes/pkg/api/v1"
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)
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// ClusterGeneratorV1Beta1 supports stable generation of a
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// federation/cluster resource.
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type ClusterGeneratorV1Beta1 struct {
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// Name of the cluster context (required)
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Name string
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// ClientCIDR is the CIDR range in which the Kubernetes APIServer
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// is available for the client (optional)
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ClientCIDR string
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// ServerAddress is the APIServer address of the Kubernetes cluster
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// that is being registered (required)
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ServerAddress string
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// SecretName is the name of the secret that stores the credentials
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// for the Kubernetes cluster that is being registered (optional)
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SecretName string
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}
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// Ensure it supports the generator pattern that uses parameter
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// injection.
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var _ Generator = &ClusterGeneratorV1Beta1{}
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// Ensure it supports the generator pattern that uses parameters
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// specified during construction.
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var _ StructuredGenerator = &ClusterGeneratorV1Beta1{}
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// Generate returns a cluster resource using the specified parameters.
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func (s ClusterGeneratorV1Beta1) Generate(genericParams map[string]interface{}) (runtime.Object, error) {
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err := ValidateParams(s.ParamNames(), genericParams)
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if err != nil {
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return nil, err
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}
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clustergen := &ClusterGeneratorV1Beta1{}
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params := map[string]string{}
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for key, value := range genericParams {
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strVal, isString := value.(string)
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if !isString {
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return nil, fmt.Errorf("expected string, saw %v for '%s'", value, key)
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}
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params[key] = strVal
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}
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clustergen.Name = params["name"]
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clustergen.ClientCIDR = params["client-cidr"]
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clustergen.ServerAddress = params["server-address"]
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clustergen.SecretName = params["secret"]
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return clustergen.StructuredGenerate()
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}
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// ParamNames returns the set of supported input parameters when using
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// the parameter injection generator pattern.
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func (s ClusterGeneratorV1Beta1) ParamNames() []GeneratorParam {
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return []GeneratorParam{
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{"name", true},
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{"client-cidr", false},
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{"server-address", true},
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{"secret", false},
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}
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}
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// StructuredGenerate outputs a federation cluster resource object
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// using the configured fields.
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func (s ClusterGeneratorV1Beta1) StructuredGenerate() (runtime.Object, error) {
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if err := s.validate(); err != nil {
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return nil, err
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}
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if s.ClientCIDR == "" {
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s.ClientCIDR = "0.0.0.0/0"
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}
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if s.SecretName == "" {
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s.SecretName = s.Name
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}
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cluster := &federationapi.Cluster{
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ObjectMeta: metav1.ObjectMeta{
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Name: s.Name,
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},
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Spec: federationapi.ClusterSpec{
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ServerAddressByClientCIDRs: []federationapi.ServerAddressByClientCIDR{
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{
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ClientCIDR: s.ClientCIDR,
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ServerAddress: s.ServerAddress,
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},
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},
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SecretRef: &v1.LocalObjectReference{
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Name: s.SecretName,
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},
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},
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}
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return cluster, nil
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}
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// validate validates required fields are set to support structured
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// generation.
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func (s ClusterGeneratorV1Beta1) validate() error {
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if len(s.Name) == 0 {
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return fmt.Errorf("name must be specified")
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}
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if len(s.ServerAddress) == 0 {
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return fmt.Errorf("server address must be specified")
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}
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return nil
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}
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