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reconcile_build.go
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reconcile_build.go
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package image
import (
"context"
"fmt"
"strconv"
"github.com/pkg/errors"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
buildapi "github.com/pivotal/kpack/pkg/apis/build/v1alpha2"
corev1alpha1 "github.com/pivotal/kpack/pkg/apis/core/v1alpha1"
)
const (
BuildRunningReason = "BuildRunning"
ResolverNotReadyReason = "ResolverNotReady"
UnknownStateReason = "UnknownState"
BuildFailedReason = "BuildFailed"
UpToDateReason = "UpToDate"
NotUpToDateMessage = "Builder is not up to date. The latest stack and buildpacks may not be in use."
)
func (c *Reconciler) reconcileBuild(ctx context.Context, image *buildapi.Image, latestBuild *buildapi.Build, sourceResolver *buildapi.SourceResolver, builder buildapi.BuilderResource, buildCacheName string) (buildapi.ImageStatus, error) {
currentBuildNumber, err := buildCounter(latestBuild)
if err != nil {
return buildapi.ImageStatus{}, errors.Wrap(err, "error parsing the image build number")
}
result, err := isBuildRequired(image, latestBuild, sourceResolver, builder)
if err != nil {
return buildapi.ImageStatus{}, errors.Wrap(err, "error determining if an image build is needed")
}
priorityClass := ""
if c.EnablePriorityClasses {
priorityClass = result.PriorityClass
}
switch result.ConditionStatus {
case corev1.ConditionTrue:
nextBuildNumber := currentBuildNumber + 1
build := image.Build(sourceResolver, builder, latestBuild, result.ReasonsStr, result.ChangesStr, nextBuildNumber, priorityClass)
build, err = c.Client.KpackV1alpha2().Builds(build.Namespace).Create(ctx, build, metav1.CreateOptions{})
if err != nil {
return buildapi.ImageStatus{}, errors.WithMessage(err, fmt.Sprintf("error creating build '%s' in namespace '%s'", build.Name, build.Namespace))
}
return buildapi.ImageStatus{
Status: corev1alpha1.Status{
Conditions: scheduledBuildCondition(build, builder),
},
BuildCounter: nextBuildNumber,
BuildCacheName: buildCacheName,
LatestBuildRef: build.BuildRef(),
LatestBuildReason: build.BuildReason(),
LatestImage: image.LatestForImage(latestBuild),
LatestStack: build.Stack(),
LatestBuildImageGeneration: build.ImageGeneration(),
}, nil
case corev1.ConditionUnknown:
fallthrough
case corev1.ConditionFalse:
return buildapi.ImageStatus{
Status: corev1alpha1.Status{
Conditions: noScheduledBuild(result.ConditionStatus, builder, latestBuild, sourceResolver),
},
LatestBuildRef: latestBuild.BuildRef(),
LatestBuildReason: latestBuild.BuildReason(),
LatestBuildImageGeneration: latestBuild.ImageGeneration(),
LatestImage: image.LatestForImage(latestBuild),
LatestStack: latestBuild.Stack(),
BuildCounter: currentBuildNumber,
BuildCacheName: buildCacheName,
}, nil
default:
return buildapi.ImageStatus{}, errors.Errorf("Error: unexpected build needed condition %s", result.ConditionStatus)
}
}
func noScheduledBuild(buildNeeded corev1.ConditionStatus, builder buildapi.BuilderResource, build *buildapi.Build, sourceResolver *buildapi.SourceResolver) corev1alpha1.Conditions {
ready := corev1alpha1.Condition{
Type: corev1alpha1.ConditionReady,
Status: corev1.ConditionUnknown,
LastTransitionTime: corev1alpha1.VolatileTime{Inner: metav1.Now()},
}
switch {
case !builder.Ready():
ready.Status = corev1.ConditionFalse
ready.Reason = buildapi.BuilderNotReady
ready.Message = builderError(builder)
case buildNeeded == corev1.ConditionUnknown && !sourceResolver.Ready():
ready.Status = corev1.ConditionUnknown
ready.Reason = ResolverNotReadyReason
ready.Message = fmt.Sprintf("Error: SourceResolver '%s' is not ready", sourceResolver.GetName())
case buildNeeded == corev1.ConditionUnknown && sourceResolver.Ready():
ready.Status = corev1.ConditionUnknown
ready.Reason = UnknownStateReason
ready.Message = "Error: Build status unknown"
case build.Status.GetCondition(corev1alpha1.ConditionSucceeded).IsTrue():
ready.Status = corev1.ConditionTrue
ready.Reason = UpToDateReason
ready.Message = defaultMessageIfNil(build.Status.GetCondition(corev1alpha1.ConditionSucceeded), "Last build succeeded")
default:
ready.Status = unknownStatusIfNil(build.Status.GetCondition(corev1alpha1.ConditionSucceeded))
ready.Reason = BuildFailedReason
ready.Message = fmt.Sprintf("Error: Build '%s' in namespace '%s' failed: %s", build.Name, build.Namespace, defaultMessageIfNil(build.Status.GetCondition(corev1alpha1.ConditionSucceeded), "unknown error"))
}
return corev1alpha1.Conditions{ready, builderReadyCondition(builder), builderUpToDateCondition(builder)}
}
func unknownStatusIfNil(condition *corev1alpha1.Condition) corev1.ConditionStatus {
if condition == nil {
return corev1.ConditionUnknown
}
return condition.Status
}
// Copies the message from the specified condition, or fills in a default message if nil.
// We should always have a message for non-successful conditions, as that conveys
// information to the user about what is expected.
func defaultMessageIfNil(condition *corev1alpha1.Condition, defaultMessage string) string {
if condition == nil {
return defaultMessage
}
return condition.Message
}
func builderReadyCondition(builder buildapi.BuilderResource) corev1alpha1.Condition {
if !builder.Ready() {
return corev1alpha1.Condition{
Type: buildapi.ConditionBuilderReady,
Status: corev1.ConditionFalse,
Reason: buildapi.BuilderNotReady,
Message: builderError(builder),
LastTransitionTime: corev1alpha1.VolatileTime{Inner: metav1.Now()},
}
}
return corev1alpha1.Condition{
Type: buildapi.ConditionBuilderReady,
Status: corev1.ConditionTrue,
Reason: buildapi.BuilderReady,
LastTransitionTime: corev1alpha1.VolatileTime{Inner: metav1.Now()},
}
}
func builderUpToDateCondition(builder buildapi.BuilderResource) corev1alpha1.Condition {
if !builder.UpToDate() {
return corev1alpha1.Condition{
Type: buildapi.ConditionBuilderUpToDate,
Status: corev1.ConditionFalse,
Reason: buildapi.BuilderNotUpToDate,
Message: NotUpToDateMessage,
LastTransitionTime: corev1alpha1.VolatileTime{Inner: metav1.Now()},
}
}
return corev1alpha1.Condition{
Type: buildapi.ConditionBuilderUpToDate,
Status: corev1.ConditionTrue,
Reason: buildapi.BuilderUpToDate,
LastTransitionTime: corev1alpha1.VolatileTime{Inner: metav1.Now()},
}
}
func builderError(builder buildapi.BuilderResource) string {
errorMessage := fmt.Sprintf("Error: Builder '%s' is not ready in namespace '%s'", builder.GetName(), builder.GetNamespace())
if message := builder.ConditionReadyMessage(); message != "" {
errorMessage = fmt.Sprintf("%s; Message: %s", errorMessage, message)
}
return errorMessage
}
func scheduledBuildCondition(build *buildapi.Build, builder buildapi.BuilderResource) corev1alpha1.Conditions {
return corev1alpha1.Conditions{
{
Type: corev1alpha1.ConditionReady,
Status: corev1.ConditionUnknown,
Reason: BuildRunningReason,
Message: fmt.Sprintf("Build '%s' is executing", build.Name),
LastTransitionTime: corev1alpha1.VolatileTime{Inner: metav1.Now()},
},
{
Type: buildapi.ConditionBuilderReady,
Status: corev1.ConditionTrue,
Reason: buildapi.BuilderReady,
LastTransitionTime: corev1alpha1.VolatileTime{Inner: metav1.Now()},
},
builderUpToDateCondition(builder),
}
}
func buildCounter(build *buildapi.Build) (int64, error) {
if build == nil {
return 0, nil
}
buildNumber := build.Labels[buildapi.BuildNumberLabel]
return strconv.ParseInt(buildNumber, 10, 64)
}
func buildRunningCondition(build *buildapi.Build, builder buildapi.BuilderResource) corev1alpha1.Conditions {
message := defaultMessageIfNil(build.Status.GetCondition(corev1alpha1.ConditionSucceeded),
fmt.Sprintf("Build '%s' is executing", build.Name))
return corev1alpha1.Conditions{
{
Type: corev1alpha1.ConditionReady,
Status: corev1.ConditionUnknown,
Reason: BuildRunningReason,
Message: message,
LastTransitionTime: corev1alpha1.VolatileTime{Inner: metav1.Now()},
},
builderReadyCondition(builder),
builderUpToDateCondition(builder),
}
}