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dc.go
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dc.go
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package analysis
import (
"fmt"
"github.com/gonum/graph"
osgraph "github.com/openshift/origin/pkg/api/graph"
buildedges "github.com/openshift/origin/pkg/build/graph"
buildutil "github.com/openshift/origin/pkg/build/util"
deployedges "github.com/openshift/origin/pkg/deploy/graph"
deploygraph "github.com/openshift/origin/pkg/deploy/graph/nodes"
imageedges "github.com/openshift/origin/pkg/image/graph"
imagegraph "github.com/openshift/origin/pkg/image/graph/nodes"
)
const (
MissingImageStreamErr = "MissingImageStream"
MissingImageStreamTagWarning = "MissingImageStreamTag"
MissingReadinessProbeWarning = "MissingReadinessProbe"
)
// FindDeploymentConfigTriggerErrors checks for possible failures in deployment config
// image change triggers.
//
// Precedence of failures:
// 1. The image stream for the tag of interest does not exist.
// 2. The image stream tag does not exist.
func FindDeploymentConfigTriggerErrors(g osgraph.Graph, f osgraph.Namer) []osgraph.Marker {
markers := []osgraph.Marker{}
for _, uncastDcNode := range g.NodesByKind(deploygraph.DeploymentConfigNodeKind) {
dcNode := uncastDcNode.(*deploygraph.DeploymentConfigNode)
marker := ictMarker(g, f, dcNode)
if marker != nil {
markers = append(markers, *marker)
}
}
return markers
}
// ictMarker inspects the image change triggers for the provided deploymentconfig and returns
// a marker in case of the following two scenarios:
//
// 1. The image stream pointed by the dc trigger doen not exist.
// 2. The image stream tag pointed by the dc trigger does not exist and there is no build in
// flight that could push to the tag.
func ictMarker(g osgraph.Graph, f osgraph.Namer, dcNode *deploygraph.DeploymentConfigNode) *osgraph.Marker {
for _, uncastIstNode := range g.PredecessorNodesByEdgeKind(dcNode, deployedges.TriggersDeploymentEdgeKind) {
if istNode := uncastIstNode.(*imagegraph.ImageStreamTagNode); !istNode.Found() {
// The image stream for the tag of interest does not exist.
if isNode, exists := doesImageStreamExist(g, uncastIstNode); !exists {
return &osgraph.Marker{
Node: dcNode,
RelatedNodes: []graph.Node{uncastIstNode, isNode},
Severity: osgraph.ErrorSeverity,
Key: MissingImageStreamErr,
Message: fmt.Sprintf("The image trigger for %s will have no effect because %s does not exist.",
f.ResourceName(dcNode), f.ResourceName(isNode)),
// TODO: Suggest `oc create imagestream` once we have that.
}
}
for _, bcNode := range buildedges.BuildConfigsForTag(g, istNode) {
// Avoid warning for the dc image trigger in case there is a build in flight.
if latestBuild := buildedges.GetLatestBuild(g, bcNode); latestBuild != nil && !buildutil.IsBuildComplete(latestBuild.Build) {
return nil
}
}
// The image stream tag of interest does not exist.
return &osgraph.Marker{
Node: dcNode,
RelatedNodes: []graph.Node{uncastIstNode},
Severity: osgraph.WarningSeverity,
Key: MissingImageStreamTagWarning,
Message: fmt.Sprintf("The image trigger for %s will have no effect until %s is imported or created by a build.",
f.ResourceName(dcNode), f.ResourceName(istNode)),
}
}
}
return nil
}
func doesImageStreamExist(g osgraph.Graph, istag graph.Node) (graph.Node, bool) {
for _, imagestream := range g.SuccessorNodesByEdgeKind(istag, imageedges.ReferencedImageStreamGraphEdgeKind) {
return imagestream, imagestream.(*imagegraph.ImageStreamNode).Found()
}
for _, imagestream := range g.SuccessorNodesByEdgeKind(istag, imageedges.ReferencedImageStreamImageGraphEdgeKind) {
return imagestream, imagestream.(*imagegraph.ImageStreamNode).Found()
}
return nil, false
}
// FindDeploymentConfigReadinessWarnings inspects deploymentconfigs and reports those that
// don't have readiness probes set up.
func FindDeploymentConfigReadinessWarnings(g osgraph.Graph, f osgraph.Namer, setProbeCommand string) []osgraph.Marker {
markers := []osgraph.Marker{}
Node:
for _, uncastDcNode := range g.NodesByKind(deploygraph.DeploymentConfigNodeKind) {
dcNode := uncastDcNode.(*deploygraph.DeploymentConfigNode)
if t := dcNode.Spec.Template; t != nil && len(t.Spec.Containers) > 0 {
for _, container := range t.Spec.Containers {
if container.ReadinessProbe != nil {
continue Node
}
}
// All of the containers in the deployment config lack a readiness probe
markers = append(markers, osgraph.Marker{
Node: uncastDcNode,
Severity: osgraph.WarningSeverity,
Key: MissingReadinessProbeWarning,
Message: fmt.Sprintf("%s has no readiness probe to verify pods are ready to accept traffic or ensure deployment is successful.",
f.ResourceName(dcNode)),
Suggestion: osgraph.Suggestion(fmt.Sprintf("%s %s --readiness ...", setProbeCommand, f.ResourceName(dcNode))),
})
continue Node
}
}
return markers
}