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bc.go
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package analysis
import (
"fmt"
"sort"
"strings"
"time"
"github.com/gonum/graph"
"github.com/gonum/graph/topo"
"k8s.io/kubernetes/pkg/api/unversioned"
osgraph "github.com/openshift/origin/pkg/api/graph"
buildapi "github.com/openshift/origin/pkg/build/api"
buildedges "github.com/openshift/origin/pkg/build/graph"
buildgraph "github.com/openshift/origin/pkg/build/graph/nodes"
imageapi "github.com/openshift/origin/pkg/image/api"
imageedges "github.com/openshift/origin/pkg/image/graph"
imagegraph "github.com/openshift/origin/pkg/image/graph/nodes"
)
const (
TagNotAvailableWarning = "ImageStreamTagNotAvailable"
LatestBuildFailedErr = "LatestBuildFailed"
MissingRequiredRegistryErr = "MissingRequiredRegistry"
MissingOutputImageStreamErr = "MissingOutputImageStream"
CyclicBuildConfigWarning = "CyclicBuildConfig"
MissingImageStreamTagWarning = "MissingImageStreamTag"
MissingImageStreamImageWarning = "MissingImageStreamImage"
)
// FindUnpushableBuildConfigs checks all build configs that will output to an IST backed by an ImageStream and checks to make sure their builds can push.
func FindUnpushableBuildConfigs(g osgraph.Graph, f osgraph.Namer) []osgraph.Marker {
markers := []osgraph.Marker{}
// note, unlike with Inputs, ImageStreamImage is not a valid type for build output
bc:
for _, bcNode := range g.NodesByKind(buildgraph.BuildConfigNodeKind) {
for _, istNode := range g.SuccessorNodesByEdgeKind(bcNode, buildedges.BuildOutputEdgeKind) {
for _, uncastImageStreamNode := range g.SuccessorNodesByEdgeKind(istNode, imageedges.ReferencedImageStreamGraphEdgeKind) {
imageStreamNode := uncastImageStreamNode.(*imagegraph.ImageStreamNode)
if !imageStreamNode.IsFound {
markers = append(markers, osgraph.Marker{
Node: bcNode,
RelatedNodes: []graph.Node{istNode},
Severity: osgraph.ErrorSeverity,
Key: MissingOutputImageStreamErr,
Message: fmt.Sprintf("%s is pushing to %s, but the image stream for that tag does not exist.",
f.ResourceName(bcNode), f.ResourceName(istNode)),
})
continue
}
if len(imageStreamNode.Status.DockerImageRepository) == 0 {
markers = append(markers, osgraph.Marker{
Node: bcNode,
RelatedNodes: []graph.Node{istNode},
Severity: osgraph.ErrorSeverity,
Key: MissingRequiredRegistryErr,
Message: fmt.Sprintf("%s is pushing to %s, but the administrator has not configured the integrated Docker registry.",
f.ResourceName(bcNode), f.ResourceName(istNode)),
Suggestion: osgraph.Suggestion("oc adm registry -h"),
})
continue bc
}
}
}
}
return markers
}
// FindMissingInputImageStreams checks all build configs and confirms that their From element exists
//
// Precedence of failures:
// 1. A build config's input points to an image stream that does not exist
// 2. A build config's input uses an image stream tag reference in an existing image stream, but no images within the image stream have that tag assigned
// 3. A build config's input uses an image stream image reference in an exisiting image stream, but no images within the image stream have the supplied image hexadecimal ID
func FindMissingInputImageStreams(g osgraph.Graph, f osgraph.Namer) []osgraph.Marker {
markers := []osgraph.Marker{}
for _, bcNode := range g.NodesByKind(buildgraph.BuildConfigNodeKind) {
for _, bcInputNode := range g.PredecessorNodesByEdgeKind(bcNode, buildedges.BuildInputImageEdgeKind) {
switch bcInputNode.(type) {
case *imagegraph.ImageStreamTagNode:
for _, uncastImageStreamNode := range g.SuccessorNodesByEdgeKind(bcInputNode, imageedges.ReferencedImageStreamGraphEdgeKind) {
imageStreamNode := uncastImageStreamNode.(*imagegraph.ImageStreamNode)
// note, BuildConfig.Spec.BuildSpec.Strategy.[Docker|Source|Custom]Stragegy.From Input of ImageStream has been converted to ImageStreamTag on the vX to api conversion
// prior to our reaching this point in the code; so there is not need to check for that type vs. ImageStreamTag or ImageStreamImage;
tagNode, _ := bcInputNode.(*imagegraph.ImageStreamTagNode)
imageStream := imageStreamNode.Object().(*imageapi.ImageStream)
if _, ok := imageStream.Status.Tags[tagNode.ImageTag()]; !ok {
markers = append(markers, osgraph.Marker{
Node: bcNode,
RelatedNodes: []graph.Node{bcInputNode,
imageStreamNode},
Severity: osgraph.WarningSeverity,
Key: MissingImageStreamTagWarning,
Message: fmt.Sprintf("%s builds from %s, but the image stream tag does not exist.", f.ResourceName(bcNode), f.ResourceName(bcInputNode)),
Suggestion: osgraph.Suggestion(fmt.Sprintf("examine analysis of build config outputs from this command and see if they build %s", f.ResourceName(bcInputNode))),
})
}
}
case *imagegraph.ImageStreamImageNode:
for _, uncastImageStreamNode := range g.SuccessorNodesByEdgeKind(bcInputNode, imageedges.ReferencedImageStreamImageGraphEdgeKind) {
imageStreamNode := uncastImageStreamNode.(*imagegraph.ImageStreamNode)
imageNode, _ := bcInputNode.(*imagegraph.ImageStreamImageNode)
imageStream := imageStreamNode.Object().(*imageapi.ImageStream)
found, imageID, suggestion := validImageStreamImage(imageNode, imageStream)
if !found {
markers = append(markers, osgraph.Marker{
Node: bcNode,
RelatedNodes: []graph.Node{bcInputNode,
imageStreamNode},
Severity: osgraph.WarningSeverity,
Key: MissingImageStreamImageWarning,
Message: fmt.Sprintf("%s builds from %s, but the image stream image does not exist.", f.ResourceName(bcNode), f.ResourceName(bcInputNode)),
Suggestion: osgraph.Suggestion(fmt.Sprintf(suggestion, imageID, f.ResourceName(imageStreamNode))),
})
}
}
}
}
}
return markers
}
// FindCircularBuilds checks all build configs for cycles
func FindCircularBuilds(g osgraph.Graph, f osgraph.Namer) []osgraph.Marker {
// Filter out all but ImageStreamTag and BuildConfig nodes
nodeFn := osgraph.NodesOfKind(imagegraph.ImageStreamTagNodeKind, buildgraph.BuildConfigNodeKind)
// Filter out all but BuildInputImage and BuildOutput edges
edgeFn := osgraph.EdgesOfKind(buildedges.BuildInputImageEdgeKind, buildedges.BuildOutputEdgeKind)
// Create desired subgraph
sub := g.Subgraph(nodeFn, edgeFn)
markers := []osgraph.Marker{}
// Check for cycles
for _, cycle := range topo.CyclesIn(sub) {
nodeNames := []string{}
for _, node := range cycle {
nodeNames = append(nodeNames, f.ResourceName(node))
}
markers = append(markers, osgraph.Marker{
Node: cycle[0],
RelatedNodes: cycle,
Severity: osgraph.WarningSeverity,
Key: CyclicBuildConfigWarning,
Message: fmt.Sprintf("Cycle detected in build configurations: %s", strings.Join(nodeNames, " -> ")),
})
}
return markers
}
// FindPendingTags inspects all imageStreamTags that serve as outputs to builds.
//
// Precedence of failures:
// 1. A build config points to the non existent tag but no current build exists.
// 2. A build config points to the non existent tag but the latest build has failed.
func FindPendingTags(g osgraph.Graph, f osgraph.Namer) []osgraph.Marker {
markers := []osgraph.Marker{}
for _, uncastIstNode := range g.NodesByKind(imagegraph.ImageStreamTagNodeKind) {
istNode := uncastIstNode.(*imagegraph.ImageStreamTagNode)
if bcNode, points := buildPointsToTag(g, uncastIstNode); points && !istNode.Found() {
latestBuild := latestBuild(g, bcNode)
// A build config points to the non existent tag but no current build exists.
if latestBuild == nil {
markers = append(markers, osgraph.Marker{
Node: graph.Node(bcNode),
RelatedNodes: []graph.Node{uncastIstNode},
Severity: osgraph.WarningSeverity,
Key: TagNotAvailableWarning,
Message: fmt.Sprintf("%s needs to be imported or created by a build.", f.ResourceName(istNode)),
Suggestion: osgraph.Suggestion(fmt.Sprintf("oc start-build %s", f.ResourceName(bcNode))),
})
continue
}
// A build config points to the non existent tag but something is going on with
// the latest build.
// TODO: Handle other build phases.
switch latestBuild.Build.Status.Phase {
case buildapi.BuildPhaseCancelled:
// TODO: Add a warning here.
case buildapi.BuildPhaseError:
// TODO: Add a warning here.
case buildapi.BuildPhaseComplete:
// We should never hit this. The output of our build is missing but the build is complete.
// Most probably the user has messed up?
case buildapi.BuildPhaseFailed:
// Since the tag hasn't been populated yet, we assume there hasn't been a successful
// build so far.
markers = append(markers, osgraph.Marker{
Node: graph.Node(latestBuild),
RelatedNodes: []graph.Node{uncastIstNode, graph.Node(bcNode)},
Severity: osgraph.ErrorSeverity,
Key: LatestBuildFailedErr,
Message: fmt.Sprintf("%s has failed.", f.ResourceName(latestBuild)),
Suggestion: osgraph.Suggestion(fmt.Sprintf("Inspect the build failure with 'oc logs %s'", f.ResourceName(latestBuild))),
})
default:
// Do nothing when latest build is new, pending, or running.
}
}
}
return markers
}
// validImageStreamImage will cycle through the imageStream.Status.Tags.[]TagEvent.DockerImageReference and determine whether an image with the hexadecimal image id
// associated with an ImageStreamImage reference in fact exists in a given ImageStream; on return, this method returns a true if does exist, and as well as the hexadecimal image
// id from the ImageStreamImage, as well as the appropriate message to add to the marker if the image was not found
func validImageStreamImage(imageNode *imagegraph.ImageStreamImageNode, imageStream *imageapi.ImageStream) (bool, string, string) {
dockerImageReference, err := imageapi.ParseDockerImageReference(imageNode.Name)
if err == nil {
for _, tagEventList := range imageStream.Status.Tags {
for _, tagEvent := range tagEventList.Items {
if strings.Contains(tagEvent.DockerImageReference, dockerImageReference.ID) {
return true, dockerImageReference.ID, ""
}
}
}
}
// check the images stream to see if any import images are in flight or have failed
annotation, ok := imageStream.Annotations[imageapi.DockerImageRepositoryCheckAnnotation]
if !ok {
return false, dockerImageReference.ID, "import the image with hexadecimal ID %s into the image stream %s"
}
if checkTime, err := time.Parse(time.RFC3339, annotation); err == nil {
// this time based annotation is set by pkg/image/controller/controller.go whenever import/tag operations are performed; unless
// in the midst of an import/tag operation, it stays set and serves as a timestamp for when the last operation occurred;
// so we will check if the image stream has been updated "recently";
// in case it is a slow link to the remote repo, see if if the check annotation occured within the last 5 minutes; if so, consider that as potentially "in progress"
compareTime := checkTime.Add(5 * time.Minute)
currentTime, _ := time.Parse(time.RFC3339, unversioned.Now().UTC().Format(time.RFC3339))
if compareTime.Before(currentTime) {
return false, dockerImageReference.ID, "import the image with hexadecimal ID %s into the image stream %s"
}
return false, dockerImageReference.ID, "a import of the image with hexadecimal ID %s into the image stream %s could be in progress; check again after a couple of minutes"
}
return false, dockerImageReference.ID, "an error occurred importing the image with hexadecimal ID %s into the image stream %s; inspect the images stream annotations for details"
}
// buildPointsToTag returns the buildConfig that points to the provided imageStreamTag.
func buildPointsToTag(g osgraph.Graph, istag graph.Node) (*buildgraph.BuildConfigNode, bool) {
for _, bcNode := range g.PredecessorNodesByEdgeKind(istag, buildedges.BuildOutputEdgeKind) {
return bcNode.(*buildgraph.BuildConfigNode), true
}
return nil, false
}
// latestBuild returns the latest build for the provided buildConfig.
func latestBuild(g osgraph.Graph, bc graph.Node) *buildgraph.BuildNode {
builds := []*buildapi.Build{}
buildNameToNode := map[string]*buildgraph.BuildNode{}
for _, buildNode := range g.SuccessorNodesByEdgeKind(bc, buildedges.BuildEdgeKind) {
build := buildNode.(*buildgraph.BuildNode)
buildNameToNode[build.Build.Name] = build
builds = append(builds, build.Build)
}
if len(builds) == 0 {
return nil
}
sort.Sort(sort.Reverse(buildapi.BuildPtrSliceByCreationTimestamp(builds)))
return buildNameToNode[builds[0].Name]
}