Use a single image for the container and the init-container of Reaper

CHANGELOG/CHANGELOG-1.15.md

@@ -17,4 +17,5 @@ When cutting a new release, update the `unreleased` heading to the tag being gen
 * [BUGFIX] [#1266](https://github.com/k8ssandra/k8ssandra-operator/issues/1266) MedusaConfigurations must now be namespace local to the K8ssandraCluster they are attached to, a webhook error will be thrown otherwise (for new clusters only). Additionally, ReplicatedSecrets should only pick up secrets from their local namespace to replicate.
 * [BUGFIX] [#1217](https://github.com/k8ssandra/k8ssandra-operator/issues/1217) Medusa storage secrets now use a ReplicatedSecret for synchronization, fixing an issue where changes to the secrets were not propagating. Additionally, fix a number of issues with local testing on ARM Macs.
 * [BUGFIX] [#1253](https://github.com/k8ssandra/k8ssandra-operator/issues/1253) Medusa storage secrets are now labelled with a unique label.
-* [FEATURE] [#1260](https://github.com/k8ssandra/k8ssandra-operator/issues/1260) Update controller-gen to version 0.14.0.
+* [FEATURE] [#1260](https://github.com/k8ssandra/k8ssandra-operator/issues/1260) Update controller-gen to version 0.14.0.
+* [BUGFIX] [1287](https://github.com/k8ssandra/k8ssandra-operator/pull/1287) Use the same image for Reaper init and main containers

controllers/reaper/reaper_controller_test.go

@@ -194,10 +194,9 @@ func testCreateReaper(t *testing.T, ctx context.Context, k8sClient client.Client
 	assert.Len(t, deployment.OwnerReferences, 1, "deployment owner reference not set")
 	assert.Equal(t, rpr.UID, deployment.OwnerReferences[0].UID, "deployment owner reference has wrong uid")
 
-	// init container should be a default image and thus should not contain the latest tag; pull policy should be the
-	// default one (IfNotPresent)
-	assert.Equal(t, "docker.io/thelastpickle/cassandra-reaper:"+reaper.DefaultVersion, deployment.Spec.Template.Spec.InitContainers[0].Image)
-	assert.Equal(t, corev1.PullIfNotPresent, deployment.Spec.Template.Spec.InitContainers[0].ImagePullPolicy)
+	// init container should use the same image and tag as the main container.
+	assert.Equal(t, deployment.Spec.Template.Spec.Containers[0].Image, deployment.Spec.Template.Spec.InitContainers[0].Image)
+	assert.Equal(t, deployment.Spec.Template.Spec.Containers[0].ImagePullPolicy, deployment.Spec.Template.Spec.InitContainers[0].ImagePullPolicy)
 
 	// main container is a custom image where the tag isn't specified, so it should default to latest, and pull policy
 	// to Always.

pkg/reaper/deployment.go

@@ -212,7 +212,6 @@ func NewDeployment(reaper *api.Reaper, dc *cassdcapi.CassandraDatacenter, keysto
 		})
 	}
 
-	initImage := reaper.Spec.InitContainerImage.ApplyDefaults(defaultImage)
 	mainImage := reaper.Spec.ContainerImage.ApplyDefaults(defaultImage)
 
 	initContainerResources := computeInitContainerResources(reaper.Spec.InitContainerResources)
@@ -236,7 +235,7 @@ func NewDeployment(reaper *api.Reaper, dc *cassdcapi.CassandraDatacenter, keysto
 				},
 				Spec: corev1.PodSpec{
 					Affinity:       reaper.Spec.Affinity,
-					InitContainers: computeInitContainers(reaper, initImage, envVars, volumeMounts, initContainerResources),
+					InitContainers: computeInitContainers(reaper, mainImage, envVars, volumeMounts, initContainerResources),
 					Containers: []corev1.Container{
 						{
 							Name:            "reaper",
@@ -265,7 +264,7 @@ func NewDeployment(reaper *api.Reaper, dc *cassdcapi.CassandraDatacenter, keysto
 					ServiceAccountName: reaper.Spec.ServiceAccountName,
 					Tolerations:        reaper.Spec.Tolerations,
 					SecurityContext:    reaper.Spec.PodSecurityContext,
-					ImagePullSecrets:   computeImagePullSecrets(reaper, mainImage, initImage),
+					ImagePullSecrets:   computeImagePullSecrets(reaper, mainImage),
 					Volumes:            volumes,
 				},
 			},
@@ -311,7 +310,7 @@ func computeMainContainerResources(resourceRequirements *corev1.ResourceRequirem
 
 func computeInitContainers(
 	reaper *api.Reaper,
-	initImage *images.Image,
+	mainImage *images.Image,
 	envVars []corev1.EnvVar,
 	volumeMounts []corev1.VolumeMount,
 	resourceRequirements *corev1.ResourceRequirements) []corev1.Container {
@@ -320,8 +319,8 @@ func computeInitContainers(
 		initContainers = append(initContainers,
 			corev1.Container{
 				Name:            "reaper-schema-init",
-				Image:           initImage.String(),
-				ImagePullPolicy: initImage.PullPolicy,
+				Image:           mainImage.String(),
+				ImagePullPolicy: mainImage.PullPolicy,
 				SecurityContext: reaper.Spec.InitContainerSecurityContext,
 				Env:             envVars,
 				Args:            []string{"schema-migration"},
@@ -332,12 +331,8 @@ func computeInitContainers(
 	return initContainers
 }
 
-func computeImagePullSecrets(reaper *api.Reaper, mainImage, initImage *images.Image) []corev1.LocalObjectReference {
-	if reaper.Spec.SkipSchemaMigration {
-		return images.CollectPullSecrets(mainImage)
-	} else {
-		return images.CollectPullSecrets(mainImage, initImage)
-	}
+func computeImagePullSecrets(reaper *api.Reaper, mainImage *images.Image) []corev1.LocalObjectReference {
+	return images.CollectPullSecrets(mainImage)
 }
 
 func computeProbe(probeTemplate *corev1.Probe) *corev1.Probe {