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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"
"github.com/golang/glog"
deploy "github.com/openshift/origin/pkg/deploy/api"
image "github.com/openshift/origin/pkg/image/api"
route "github.com/openshift/origin/pkg/route/api"
)
// Pipeline holds components
type Pipeline struct {
From string
InputImage *ImageRef
Build *BuildRef
Image *ImageRef
Deployment *DeploymentConfigRef
Labels map[string]string
}
// NewImagePipeline creates a new pipeline with components that are not
// expected to be built
func NewImagePipeline(from string, image *ImageRef) (*Pipeline, error) {
return &Pipeline{
From: from,
Image: image,
}, nil
}
// NewBuildPipeline creates a new pipeline with components that are
// expected to be built
func NewBuildPipeline(from string, input *ImageRef, outputDocker bool, strategy *BuildStrategyRef, source *SourceRef) (*Pipeline, error) {
name, ok := NameSuggestions{source, input}.SuggestName()
if !ok {
name = fmt.Sprintf("app%d", rand.Intn(10000))
}
output := &ImageRef{
DockerImageReference: image.DockerImageReference{
Name: name,
Tag: image.DefaultImageTag,
},
OutputImage: true,
AsImageStream: !outputDocker,
}
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,
}
return &Pipeline{
From: from,
InputImage: input,
Image: output,
Build: build,
}, nil
}
// NeedsDeployment sets the pipeline for deployment
func (p *Pipeline) NeedsDeployment(env Environment, labels map[string]string, name string) error {
if p.Deployment != nil {
return nil
}
p.Deployment = &DeploymentConfigRef{
Name: name,
Images: []*ImageRef{
p.Image,
},
Env: env,
Labels: labels,
}
return nil
}
// Objects converts all the components in the pipeline into runtime objects
func (p *Pipeline) Objects(accept, objectAccept Acceptor) (Objects, error) {
objects := Objects{}
if p.InputImage != nil && p.InputImage.AsImageStream && accept.Accept(p.InputImage) {
repo, err := p.InputImage.ImageStream()
if err != nil {
return nil, err
}
if objectAccept.Accept(repo) {
objects = append(objects, repo)
}
}
if p.Image != nil && p.Image.AsImageStream && accept.Accept(p.Image) {
repo, err := p.Image.ImageStream()
if err != nil {
return nil, err
}
if objectAccept.Accept(repo) {
objects = append(objects, repo)
}
}
if p.Build != nil && accept.Accept(p.Build) {
build, err := p.Build.BuildConfig()
if err != nil {
return nil, err
}
if objectAccept.Accept(build) {
objects = append(objects, build)
}
}
if p.Deployment != nil && accept.Accept(p.Deployment) {
dc, err := p.Deployment.DeploymentConfig()
if err != nil {
return nil, err
}
if objectAccept.Accept(dc) {
objects = append(objects, dc)
}
}
return objects, nil
}
// PipelineGroup is a group of Pipelines
type PipelineGroup []*Pipeline
// Reduce squashes all common components from the pipelines
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, ""
}
type sortablePorts []kapi.ContainerPort
func (s sortablePorts) Len() int { return len(s) }
func (s sortablePorts) Less(i, j int) bool { return s[i].ContainerPort < s[j].ContainerPort }
func (s sortablePorts) Swap(i, j int) {
p := s[i]
s[i] = s[j]
s[j] = p
}
// portName returns a unique key for the given port and protocol which can be used as a service port name
func portName(port int, protocol kapi.Protocol) string {
if protocol == "" {
protocol = kapi.ProtocolTCP
}
return strings.ToLower(fmt.Sprintf("%d-%s", port, protocol))
}
// AddServices sets up services for the provided objects
func AddServices(objects Objects, firstPortOnly bool) Objects {
svcs := []runtime.Object{}
for _, o := range objects {
switch t := o.(type) {
case *deploy.DeploymentConfig:
name, generateName := makeValidServiceName(t.Name)
svc := &kapi.Service{
ObjectMeta: kapi.ObjectMeta{
Name: name,
GenerateName: generateName,
Labels: t.Labels,
},
Spec: kapi.ServiceSpec{
Selector: t.Template.ControllerTemplate.Selector,
},
}
svcPorts := map[string]struct{}{}
for _, container := range t.Template.ControllerTemplate.Template.Spec.Containers {
ports := sortablePorts(container.Ports)
sort.Sort(&ports)
for _, p := range ports {
name := portName(p.ContainerPort, p.Protocol)
_, exists := svcPorts[name]
if exists {
continue
}
svcPorts[name] = struct{}{}
svc.Spec.Ports = append(svc.Spec.Ports, kapi.ServicePort{
Name: name,
Port: p.ContainerPort,
Protocol: p.Protocol,
TargetPort: kutil.NewIntOrStringFromInt(p.ContainerPort),
})
if firstPortOnly {
break
}
}
}
if len(svc.Spec.Ports) == 0 {
glog.Warningf("A service will not be generated for DeploymentConfig %q because no exposed ports were detected. Use 'oc expose dc %q --port=[port] --generator=service/v1' to create a service.", t.Name, t.Name)
continue
}
svcs = append(svcs, svc)
}
}
return append(objects, svcs...)
}
// AddRoutes sets up routes for the provided objects
func AddRoutes(objects Objects) Objects {
routes := []runtime.Object{}
for _, o := range objects {
switch t := o.(type) {
case *kapi.Service:
routes = append(routes, &route.Route{
ObjectMeta: kapi.ObjectMeta{
Name: t.Name,
Labels: t.Labels,
},
ServiceName: t.Name,
})
}
}
return append(objects, routes...)
}
type acceptNew struct{}
// AcceptNew only accepts runtime.Objects with an empty resource version.
var AcceptNew Acceptor = acceptNew{}
// Accept accepts any kind of object
func (acceptNew) Accept(from interface{}) bool {
_, meta, err := objectMetaData(from)
if err != nil {
return false
}
if len(meta.ResourceVersion) > 0 {
return false
}
return true
}
type acceptUnique struct {
typer runtime.ObjectTyper
objects map[string]struct{}
}
// Accept accepts any kind of object it hasn't accepted before
func (a *acceptUnique) Accept(from interface{}) bool {
obj, meta, err := objectMetaData(from)
if err != nil {
return false
}
_, kind, err := a.typer.ObjectVersionAndKind(obj)
if err != nil {
return false
}
key := fmt.Sprintf("%s/%s", kind, meta.Name)
_, exists := a.objects[key]
if exists {
return false
}
a.objects[key] = struct{}{}
return true
}
// NewAcceptUnique creates an acceptor that only accepts unique objects
// by kind and name
func NewAcceptUnique(typer runtime.ObjectTyper) Acceptor {
return &acceptUnique{
typer: typer,
objects: map[string]struct{}{},
}
}
func objectMetaData(raw interface{}) (runtime.Object, *kapi.ObjectMeta, error) {
obj, ok := raw.(runtime.Object)
if !ok {
return nil, nil, fmt.Errorf("%#v is not a runtime.Object", raw)
}
meta, err := kapi.ObjectMetaFor(obj)
if err != nil {
return nil, nil, err
}
return obj, meta, nil
}
type acceptBuildConfigs struct {
typer runtime.ObjectTyper
}
// Accept accepts BuildConfigs and ImageStreams
func (a *acceptBuildConfigs) Accept(from interface{}) bool {
obj, _, err := objectMetaData(from)
if err != nil {
return false
}
_, kind, err := a.typer.ObjectVersionAndKind(obj)
if err != nil {
return false
}
return kind == "BuildConfig" || kind == "ImageStream"
}
// NewAcceptBuildConfigs creates an acceptor accepting BuildConfig objects
// and ImageStreams objects.
func NewAcceptBuildConfigs(typer runtime.ObjectTyper) Acceptor {
return &acceptBuildConfigs{
typer: typer,
}
}
// Acceptors is a list of acceptors that behave like a single acceptor.
// All acceptors must accept an object for it to be accepted.
type Acceptors []Acceptor
// Accept iterates through all acceptors and determines whether the object
// should be accepted
func (aa Acceptors) Accept(from interface{}) bool {
for _, a := range aa {
if !a.Accept(from) {
return false
}
}
return true
}
type acceptAll struct{}
// AcceptAll accepts all objects
var AcceptAll Acceptor = acceptAll{}
// Accept accepts everything
func (acceptAll) Accept(_ interface{}) bool {
return true
}
// Objects is a set of runtime objects
type Objects []runtime.Object
// Acceptor is an interface for accepting objects
type Acceptor interface {
Accept(from interface{}) bool
}
type acceptFirst struct {
handled map[interface{}]struct{}
}
// NewAcceptFirst returns a new Acceptor
func NewAcceptFirst() Acceptor {
return &acceptFirst{make(map[interface{}]struct{})}
}
// Accept accepts any object it hasn't accepted before
func (s *acceptFirst) Accept(from interface{}) bool {
if _, ok := s.handled[from]; ok {
return false
}
s.handled[from] = struct{}{}
return true
}