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deployment.go
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deployment.go
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package veneers
import (
"sort"
"github.com/gonum/graph"
"github.com/gonum/graph/search"
kapi "github.com/GoogleCloudPlatform/kubernetes/pkg/api"
osgraph "github.com/openshift/origin/pkg/api/graph"
kubeedges "github.com/openshift/origin/pkg/api/kubegraph"
kubegraph "github.com/openshift/origin/pkg/api/kubegraph/nodes"
buildedges "github.com/openshift/origin/pkg/build/graph"
buildgraph "github.com/openshift/origin/pkg/build/graph/nodes"
deployedges "github.com/openshift/origin/pkg/deploy/graph"
deploygraph "github.com/openshift/origin/pkg/deploy/graph/nodes"
imagegraph "github.com/openshift/origin/pkg/image/graph/nodes"
)
// DeploymentPipelineMap describes a single deployment config and the objects
// that contributed to that deployment.
type DeploymentPipelineMap map[*deploygraph.DeploymentConfigNode][]ImagePipeline
// ImagePipeline represents a build, its output, and any inputs. The input
// to a build may be another ImagePipeline.
type ImagePipeline struct {
Image ImageTagLocation
Build *buildgraph.BuildConfigNode
// If set, the base image used by the build
BaseImage ImageTagLocation
// If set, the source repository that inputs to the build
Source SourceLocation
}
type DeploymentFlow struct {
Deployment *deploygraph.DeploymentConfigNode
Images []ImagePipeline
}
// ServiceReference is a service and the DeploymentConfigs it covers
type ServiceReference struct {
Service *kubegraph.ServiceNode
CoveredDCs []*deploygraph.DeploymentConfigNode
CoveredRCs []*kubegraph.ReplicationControllerNode
CoveredPods []*kubegraph.PodNode
}
// ServiceGroup is a related set of resources that should be displayed together
// logically. They are usually sorted internally.
type ServiceGroup struct {
Services []ServiceReference
Deployments []DeploymentFlow
Builds []ImagePipeline
}
// ImageTagLocation identifies the source or destination of an image. Represents
// both a tag in a Docker image repository, as well as a tag in an OpenShift image stream.
type ImageTagLocation interface {
ID() int
ImageSpec() string
ImageTag() string
}
// SourceLocation identifies a repository that is an input to a build.
type SourceLocation interface {
ID() int
}
// DeploymentPipelines returns a map of DeploymentConfigs to the deployment flows that create them,
// extracted from the provided Graph.
func DeploymentPipelines(g osgraph.Graph) (DeploymentPipelineMap, osgraph.NodeSet) {
covered := make(osgraph.NodeSet)
g = g.EdgeSubgraph(osgraph.ReverseGraphEdge)
flows := make(DeploymentPipelineMap)
for _, node := range g.NodeList() {
switch t := node.(type) {
case *deploygraph.DeploymentConfigNode:
covered.Add(t.ID())
images := []ImagePipeline{}
for _, n := range g.Neighbors(node) {
// find incoming image edges only
switch g.EdgeKind(g.EdgeBetween(node, n)) {
case deployedges.TriggersDeploymentEdgeKind, deployedges.UsedInDeploymentEdgeKind:
if flow, ok := ImagePipelineFromNode(g, n, covered); ok {
images = append(images, flow)
}
}
}
output := []ImagePipeline{}
// ensure the list of images is ordered the same as what is in the template
if template := t.DeploymentConfig.Template.ControllerTemplate.Template; template != nil {
deployedges.EachTemplateImage(
&template.Spec,
deployedges.DeploymentConfigHasTrigger(t.DeploymentConfig),
func(image deployedges.TemplateImage, err error) {
if err != nil {
return
}
for i := range images {
switch t := images[i].Image.(type) {
case *imagegraph.ImageStreamTagNode:
if image.Ref != nil {
continue
}
from := image.From
if t.ImageStream.Name != from.Name || t.ImageStream.Namespace != from.Namespace {
continue
}
output = append(output, images[i])
return
case *imagegraph.DockerImageRepositoryNode:
if image.From != nil {
continue
}
ref1, ref2 := t.Ref.Minimal(), image.Ref.DockerClientDefaults().Minimal()
if ref1 != ref2 {
continue
}
output = append(output, images[i])
return
}
}
},
)
}
flows[t] = output
}
}
return flows, covered
}
// ImagePipelineFromNode attempts to locate a build flow from the provided node. If no such
// build flow can be located, false is returned.
func ImagePipelineFromNode(g osgraph.Graph, n graph.Node, covered osgraph.NodeSet) (ImagePipeline, bool) {
flow := ImagePipeline{}
switch node := n.(type) {
case *buildgraph.BuildConfigNode:
covered.Add(n.ID())
base, src, _ := findBuildInputs(g, n, covered)
flow.Build = node
flow.BaseImage = base
flow.Source = src
return flow, true
case ImageTagLocation:
covered.Add(n.ID())
flow.Image = node
for _, input := range g.Neighbors(n) {
switch g.EdgeKind(g.EdgeBetween(n, input)) {
case buildedges.BuildOutputEdgeKind:
covered.Add(input.ID())
build := input.(*buildgraph.BuildConfigNode)
if flow.Build != nil {
// report this as an error (unexpected duplicate input build)
}
if build.BuildConfig == nil {
// report this as as a missing build / broken link
break
}
base, src, _ := findBuildInputs(g, input, covered)
flow.Build = build
flow.BaseImage = base
flow.Source = src
}
}
return flow, true
default:
return flow, false
}
}
func findBuildInputs(g osgraph.Graph, n graph.Node, covered osgraph.NodeSet) (base ImageTagLocation, source SourceLocation, err error) {
// find inputs to the build
for _, input := range g.Neighbors(n) {
switch g.EdgeKind(g.EdgeBetween(n, input)) {
case buildedges.BuildInputEdgeKind:
if source != nil {
// report this as an error (unexpected duplicate source)
}
covered.Add(input.ID())
source = input.(SourceLocation)
case buildedges.BuildInputImageEdgeKind:
if base != nil {
// report this as an error (unexpected duplicate input build)
}
covered.Add(input.ID())
base = input.(ImageTagLocation)
}
}
return
}
// ServiceAndDeploymentGroups breaks the provided graph of API relationships into ServiceGroup objects,
// ordered consistently. Groups are organized so that overlapping Services and DeploymentConfigs are
// part of the same group, Deployment Configs are each in their own group, and then BuildConfigs are
// part of the last service group.
func ServiceAndDeploymentGroups(g osgraph.Graph) []ServiceGroup {
deploys, covered := DeploymentPipelines(g)
other := g.Subgraph(UncoveredDeploymentFlowNodes(covered), UncoveredDeploymentFlowEdges(covered))
components := search.Tarjan(other)
serviceGroups := []ServiceGroup{}
for _, c := range components {
group := ServiceGroup{}
matches := osgraph.NodesByKind(other, c, kubegraph.ServiceNodeKind, deploygraph.DeploymentConfigNodeKind)
svcs, dcs, _ := matches[0], matches[1], matches[2]
for _, n := range svcs {
coveredDCs := []*deploygraph.DeploymentConfigNode{}
coveredRCs := []*kubegraph.ReplicationControllerNode{}
coveredPods := []*kubegraph.PodNode{}
for _, neighbor := range other.Neighbors(n) {
switch other.EdgeKind(g.EdgeBetween(neighbor, n)) {
case kubeedges.ExposedThroughServiceEdgeKind:
containerNode := osgraph.GetTopLevelContainerNode(g, neighbor)
switch castCoveredNode := containerNode.(type) {
case *deploygraph.DeploymentConfigNode:
coveredDCs = append(coveredDCs, castCoveredNode)
case *kubegraph.ReplicationControllerNode:
coveredRCs = append(coveredRCs, castCoveredNode)
case *kubegraph.PodNode:
coveredPods = append(coveredPods, castCoveredNode)
}
}
}
group.Services = append(group.Services, ServiceReference{
Service: n.(*kubegraph.ServiceNode),
CoveredDCs: coveredDCs,
CoveredRCs: coveredRCs,
CoveredPods: coveredPods,
})
}
sort.Sort(SortedServiceReferences(group.Services))
for _, n := range dcs {
d := n.(*deploygraph.DeploymentConfigNode)
group.Deployments = append(group.Deployments, DeploymentFlow{
Deployment: d,
Images: deploys[d],
})
}
sort.Sort(SortedDeploymentPipelines(group.Deployments))
if len(dcs) == 0 || len(svcs) == 0 {
unknown := g.SubgraphWithNodes(c, osgraph.ExistingDirectEdge)
for _, n := range unknown.NodeList() {
g.PredecessorEdges(n, osgraph.AddGraphEdgesTo(unknown), buildedges.BuildOutputEdgeKind)
}
unknown = unknown.EdgeSubgraph(osgraph.ReverseGraphEdge)
for _, n := range unknown.RootNodes() {
if flow, ok := ImagePipelineFromNode(unknown, n, make(osgraph.NodeSet)); ok {
group.Builds = append(group.Builds, flow)
}
}
}
sort.Sort(SortedImagePipelines(group.Builds))
serviceGroups = append(serviceGroups, group)
}
sort.Sort(SortedServiceGroups(serviceGroups))
return serviceGroups
}
// UncoveredDeploymentFlowEdges preserves (and duplicates) edges that were not
// covered by a deployment flow. As a special case, it preserves edges between
// Services and DeploymentConfigs.
func UncoveredDeploymentFlowEdges(covered osgraph.NodeSet) osgraph.EdgeFunc {
return func(g osgraph.Interface, head, tail graph.Node, edgeKind string) bool {
if edgeKind == kubeedges.ExposedThroughServiceEdgeKind {
return osgraph.AddReversedEdge(g, head, tail, osgraph.ReferencedByEdgeKind)
}
if covered.Has(head.ID()) && covered.Has(tail.ID()) {
return false
}
return osgraph.AddReversedEdge(g, head, tail, osgraph.ReferencedByEdgeKind)
}
}
// UncoveredDeploymentFlowNodes includes nodes that either services or deployment
// configs, or which haven't previously been covered.
func UncoveredDeploymentFlowNodes(covered osgraph.NodeSet) osgraph.NodeFunc {
return func(g osgraph.Interface, node graph.Node) bool {
switch node.(type) {
case *deploygraph.DeploymentConfigNode, *kubegraph.ServiceNode:
return true
}
return !covered.Has(node.ID())
}
}
// Sorts on the provided objects.
type SortedServiceReferences []ServiceReference
func (m SortedServiceReferences) Len() int { return len(m) }
func (m SortedServiceReferences) Swap(i, j int) { m[i], m[j] = m[j], m[i] }
func (m SortedServiceReferences) Less(i, j int) bool {
return CompareObjectMeta(&m[i].Service.ObjectMeta, &m[j].Service.ObjectMeta)
}
type SortedDeploymentPipelines []DeploymentFlow
func (m SortedDeploymentPipelines) Len() int { return len(m) }
func (m SortedDeploymentPipelines) Swap(i, j int) { m[i], m[j] = m[j], m[i] }
func (m SortedDeploymentPipelines) Less(i, j int) bool {
return CompareObjectMeta(&m[i].Deployment.ObjectMeta, &m[j].Deployment.ObjectMeta)
}
type SortedImagePipelines []ImagePipeline
func (m SortedImagePipelines) Len() int { return len(m) }
func (m SortedImagePipelines) Swap(i, j int) { m[i], m[j] = m[j], m[i] }
func (m SortedImagePipelines) Less(i, j int) bool {
return CompareImagePipeline(&m[i], &m[j])
}
type SortedServiceGroups []ServiceGroup
func (m SortedServiceGroups) Len() int { return len(m) }
func (m SortedServiceGroups) Swap(i, j int) { m[i], m[j] = m[j], m[i] }
func (m SortedServiceGroups) Less(i, j int) bool {
a, b := m[i], m[j]
switch {
case len(a.Services) != 0 && len(b.Services) != 0:
return CompareObjectMeta(&a.Services[0].Service.ObjectMeta, &b.Services[0].Service.ObjectMeta)
case len(a.Services) != 0:
return true
case len(b.Services) != 0:
return false
}
switch {
case len(a.Deployments) != 0 && len(b.Deployments) != 0:
return CompareObjectMeta(&a.Deployments[0].Deployment.ObjectMeta, &b.Deployments[0].Deployment.ObjectMeta)
case len(a.Deployments) != 0:
return true
case len(b.Deployments) != 0:
return false
}
switch {
case len(a.Builds) != 0 && len(b.Builds) != 0:
return CompareImagePipeline(&a.Builds[0], &b.Builds[0])
case len(a.Deployments) != 0:
return true
case len(b.Deployments) != 0:
return false
}
return true
}
func CompareObjectMeta(a, b *kapi.ObjectMeta) bool {
if a.Namespace == b.Namespace {
return a.Name < b.Name
}
return a.Namespace < b.Namespace
}
func CompareImagePipeline(a, b *ImagePipeline) bool {
switch {
case a.Build != nil && b.Build != nil:
return CompareObjectMeta(&a.Build.ObjectMeta, &b.Build.ObjectMeta)
case a.Build != nil:
return true
case b.Build != nil:
return false
}
if a.Image == nil || b.Image == nil {
return true
}
return a.Image.ImageSpec() < b.Image.ImageSpec()
}