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pipeline.go
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pipeline.go
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package app
import (
"fmt"
"math/rand"
"regexp"
"sort"
"strings"
kapi "github.com/GoogleCloudPlatform/kubernetes/pkg/api"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api/validation"
"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
kutil "github.com/GoogleCloudPlatform/kubernetes/pkg/util"
deploy "github.com/openshift/origin/pkg/deploy/api"
)
type Pipeline struct {
From string
InputImage *ImageRef
Build *BuildRef
Image *ImageRef
Deployment *DeploymentConfigRef
}
func NewImagePipeline(from string, image *ImageRef) (*Pipeline, error) {
return &Pipeline{
From: from,
Image: image,
}, nil
}
func NewBuildPipeline(from string, input *ImageRef, strategy *BuildStrategyRef, source *SourceRef) (*Pipeline, error) {
pipeline := &Pipeline{
From: from,
}
strategy.Base = input
name, ok := NameSuggestions{source, input}.SuggestName()
if !ok {
name = fmt.Sprintf("app%d", rand.Intn(10000))
}
output := &ImageRef{
Name: name,
Tag: "latest",
AsImageRepository: true,
}
if input != nil {
// TODO: assumes that build doesn't change the image metadata. In the future
// we could get away with deferred generation possibly.
output.Info = input.Info
}
build := &BuildRef{
Source: source,
Input: input,
Strategy: strategy,
Output: output,
}
pipeline.InputImage = input
pipeline.Image = output
pipeline.Build = build
return pipeline, nil
}
func (p *Pipeline) NeedsDeployment(env Environment) error {
if p.Deployment != nil {
return nil
}
p.Deployment = &DeploymentConfigRef{
Images: []*ImageRef{
p.Image,
},
Env: env,
}
return nil
}
func (p *Pipeline) Objects(accept Acceptor) (Objects, error) {
objects := Objects{}
if p.InputImage != nil && p.InputImage.AsImageRepository && accept.Accept(p.InputImage) {
repo, err := p.InputImage.ImageRepository()
if err != nil {
return nil, err
}
objects = append(objects, repo)
}
if p.Image != nil && p.Image.AsImageRepository && accept.Accept(p.Image) {
repo, err := p.Image.ImageRepository()
if err != nil {
return nil, err
}
objects = append(objects, repo)
}
if p.Build != nil && accept.Accept(p.Build) {
build, err := p.Build.BuildConfig()
if err != nil {
return nil, err
}
objects = append(objects, build)
}
if p.Deployment != nil && accept.Accept(p.Deployment) {
dc, err := p.Deployment.DeploymentConfig()
if err != nil {
return nil, err
}
objects = append(objects, dc)
}
return objects, nil
}
type PipelineGroup []*Pipeline
func (g PipelineGroup) Reduce() error {
var deployment *DeploymentConfigRef
for _, p := range g {
if p.Deployment == nil || p.Deployment == deployment {
continue
}
if deployment == nil {
deployment = p.Deployment
} else {
deployment.Images = append(deployment.Images, p.Deployment.Images...)
deployment.Env = NewEnvironment(deployment.Env, p.Deployment.Env)
p.Deployment = deployment
}
}
return nil
}
func (g PipelineGroup) String() string {
s := []string{}
for _, p := range g {
s = append(s, p.From)
}
return strings.Join(s, "+")
}
const maxServiceNameLength = 24
var invalidServiceChars = regexp.MustCompile("[^-a-z0-9]")
func makeValidServiceName(name string) (string, string) {
if ok, _ := validation.ValidateServiceName(name, false); ok {
return name, ""
}
name = strings.ToLower(name)
name = invalidServiceChars.ReplaceAllString(name, "")
name = strings.TrimFunc(name, func(r rune) bool { return r == '-' })
switch {
case len(name) == 0:
return "", "service-"
case len(name) > maxServiceNameLength:
name = name[:maxServiceNameLength]
}
return name, ""
}
func sortedPorts(ports []kapi.Port) []int {
result := []int{}
for _, p := range ports {
result = append(result, p.ContainerPort)
}
sort.Ints(result)
return result
}
func AddServices(objects Objects) Objects {
svcs := []runtime.Object{}
for _, o := range objects {
switch t := o.(type) {
case *deploy.DeploymentConfig:
for _, container := range t.Template.ControllerTemplate.Template.Spec.Containers {
ports := sortedPorts(container.Ports)
for _, p := range ports {
name, generateName := makeValidServiceName(t.Name)
svcs = append(svcs, &kapi.Service{
ObjectMeta: kapi.ObjectMeta{
Name: name,
GenerateName: generateName,
Labels: t.Labels,
},
Spec: kapi.ServiceSpec{
ContainerPort: kutil.NewIntOrStringFromInt(p),
Port: p,
Selector: t.Template.ControllerTemplate.Selector,
},
})
break
}
break
}
}
}
return append(svcs, objects...)
}
type Objects []runtime.Object
type Acceptor interface {
Accept(from interface{}) bool
}
type acceptFirst struct {
handled map[interface{}]struct{}
}
func NewAcceptFirst() Acceptor {
return &acceptFirst{make(map[interface{}]struct{})}
}
func (s *acceptFirst) Accept(from interface{}) bool {
if _, ok := s.handled[from]; ok {
return false
}
s.handled[from] = struct{}{}
return true
}