114 lines
3.2 KiB
Go
114 lines
3.2 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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"strings"
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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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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/apis/extensions"
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)
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// DeploymentGeneratorV1 supports stable generation of a deployment
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type DeploymentBasicGeneratorV1 struct {
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Name string
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Images []string
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}
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// Ensure it supports the generator pattern that uses parameters specified during construction
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var _ StructuredGenerator = &DeploymentBasicGeneratorV1{}
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func (DeploymentBasicGeneratorV1) ParamNames() []GeneratorParam {
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return []GeneratorParam{
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{"name", true},
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{"image", true},
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}
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}
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func (s DeploymentBasicGeneratorV1) Generate(params map[string]interface{}) (runtime.Object, error) {
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err := ValidateParams(s.ParamNames(), params)
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if err != nil {
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return nil, err
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}
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name, isString := params["name"].(string)
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if !isString {
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return nil, fmt.Errorf("expected string, saw %v for 'name'", name)
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}
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imageStrings, isArray := params["image"].([]string)
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if !isArray {
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return nil, fmt.Errorf("expected []string, found :%v", imageStrings)
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}
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delegate := &DeploymentBasicGeneratorV1{Name: name, Images: imageStrings}
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return delegate.StructuredGenerate()
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}
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// StructuredGenerate outputs a deployment object using the configured fields
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func (s *DeploymentBasicGeneratorV1) 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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podSpec := api.PodSpec{Containers: []api.Container{}}
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for _, imageString := range s.Images {
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// Retain just the image name
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imageSplit := strings.Split(imageString, "/")
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name := imageSplit[len(imageSplit)-1]
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// Remove any tag or hash
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if strings.Contains(name, ":") {
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name = strings.Split(name, ":")[0]
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} else if strings.Contains(name, "@") {
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name = strings.Split(name, "@")[0]
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}
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podSpec.Containers = append(podSpec.Containers, api.Container{Name: name, Image: imageString})
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}
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// setup default label and selector
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labels := map[string]string{}
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labels["app"] = s.Name
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selector := metav1.LabelSelector{MatchLabels: labels}
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deployment := extensions.Deployment{
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ObjectMeta: api.ObjectMeta{
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Name: s.Name,
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Labels: labels,
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},
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Spec: extensions.DeploymentSpec{
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Replicas: 1,
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Selector: &selector,
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Template: api.PodTemplateSpec{
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ObjectMeta: api.ObjectMeta{
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Labels: labels,
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},
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Spec: podSpec,
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},
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},
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}
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return &deployment, nil
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}
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// validate validates required fields are set to support structured generation
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func (s *DeploymentBasicGeneratorV1) 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.Images) == 0 {
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return fmt.Errorf("at least one image must be specified")
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}
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return nil
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}
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