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Do not restart cluster when scaling up #4964

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Do not restart cluster when scaling up #4964

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1f18573
k8s: use dedicated method to compute old conf hash
alenkacz May 27, 2022
e46291c
k8s: ignore seed_servers field when computing config hash
alenkacz May 28, 2022
1f2496c
k8s: add integration test for scaling up
alenkacz May 30, 2022
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131 changes: 80 additions & 51 deletions src/go/k8s/controllers/redpanda/cluster_controller_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -33,21 +33,21 @@ import (
"sigs.k8s.io/controller-runtime/pkg/client/fake"
)

var _ = Describe("RedPandaCluster controller", func() {
const (
timeout = time.Second * 30
interval = time.Second * 1

adminPort = 9644
kafkaPort = 9092
pandaProxyPort = 8082
schemaRegistryPort = 8081
redpandaConfigurationFile = "redpanda.yaml"
replicas = 1
redpandaContainerTag = "x"
redpandaContainerImage = "vectorized/redpanda"
)
const (
timeout = time.Second * 30
interval = time.Second * 1

adminPort = 9644
kafkaPort = 9092
pandaProxyPort = 8082
schemaRegistryPort = 8081
redpandaConfigurationFile = "redpanda.yaml"
replicas = 1
redpandaContainerTag = "x"
redpandaContainerImage = "vectorized/redpanda"
)

var _ = Describe("RedPandaCluster controller", func() {
Context("When creating RedpandaCluster", func() {
It("Should create Redpanda cluster with corresponding resources", func() {
resourceRedpanda := corev1.ResourceList{
Expand Down Expand Up @@ -259,48 +259,13 @@ var _ = Describe("RedPandaCluster controller", func() {
}, timeout, interval).Should(BeTrue())
})
It("creates redpanda cluster with tls enabled", func() {
resources := corev1.ResourceList{
corev1.ResourceCPU: resource.MustParse("1"),
corev1.ResourceMemory: resource.MustParse("2Gi"),
}

key := types.NamespacedName{
Name: "redpanda-test-tls",
Namespace: "default",
}
redpandaCluster := &v1alpha1.Cluster{
ObjectMeta: metav1.ObjectMeta{
Name: key.Name,
Namespace: key.Namespace,
},
Spec: v1alpha1.ClusterSpec{
Image: redpandaContainerImage,
Version: redpandaContainerTag,
Replicas: pointer.Int32Ptr(replicas),
Configuration: v1alpha1.RedpandaConfig{
KafkaAPI: []v1alpha1.KafkaAPI{
{
Port: kafkaPort,
TLS: v1alpha1.KafkaAPITLS{Enabled: true, RequireClientAuth: true},
},
},
AdminAPI: []v1alpha1.AdminAPI{{Port: adminPort}},
},
Resources: v1alpha1.RedpandaResourceRequirements{
ResourceRequirements: corev1.ResourceRequirements{
Limits: resources,
Requests: resources,
},
Redpanda: nil,
},
},
}
redpandaCluster := rpCluster()
Expect(k8sClient.Create(context.Background(), redpandaCluster)).Should(Succeed())

By("Creating StatefulSet")
var sts appsv1.StatefulSet
Eventually(func() bool {
err := k8sClient.Get(context.Background(), key, &sts)
err := k8sClient.Get(context.Background(), types.NamespacedName{Name: redpandaCluster.Name, Namespace: redpandaCluster.Namespace}, &sts)
return err == nil &&
*sts.Spec.Replicas == replicas
}, timeout, interval).Should(BeTrue())
Expand Down Expand Up @@ -690,6 +655,31 @@ var _ = Describe("RedPandaCluster controller", func() {
rc.Status.Nodes.ExternalBootstrap != nil
}, timeout, interval).Should(BeTrue())
})
It("does not trigger restart when scaling up", func() {
redpandaCluster := rpCluster()
redpandaCluster.Name = "no-restart-cluster"
key := types.NamespacedName{Name: redpandaCluster.Name, Namespace: redpandaCluster.Namespace}
Expect(k8sClient.Create(context.Background(), redpandaCluster)).Should(Succeed())

By("Creating StatefulSet")
var sts appsv1.StatefulSet
Eventually(func() bool {
err := k8sClient.Get(context.Background(), key, &sts)
return err == nil &&
*sts.Spec.Replicas == replicas
}, timeout, interval).Should(BeTrue())

// configmap annotation should not change when scaling up replicas
// to avoid unnecessary cluster restart
configMapHash := sts.Annotations[res.ConfigMapHashAnnotationKey]
var existingCluster v1alpha1.Cluster
Expect(k8sClient.Get(context.Background(), key, &existingCluster)).Should(Succeed())
var repliasP1 int32 = replicas + 1
existingCluster.Spec.Replicas = &repliasP1
Expect(k8sClient.Update(context.Background(), &existingCluster)).Should(Succeed())
newConfigMapHash := sts.Annotations[res.ConfigMapHashAnnotationKey]
Expect(newConfigMapHash).Should(Equal(configMapHash))
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Better using Consistently(func ...) in this case, even if it takes more time

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Also the sts is not reloaded

})
})

Context("Calling reconcile", func() {
Expand Down Expand Up @@ -737,6 +727,45 @@ var _ = Describe("RedPandaCluster controller", func() {
Entry("Random image pull policy", "asdvasd", Not(Succeed())))
})

func rpCluster() *v1alpha1.Cluster {
resources := corev1.ResourceList{
corev1.ResourceCPU: resource.MustParse("1"),
corev1.ResourceMemory: resource.MustParse("2Gi"),
}

key := types.NamespacedName{
Name: "redpanda-test-tls",
Namespace: "default",
}
return &v1alpha1.Cluster{
ObjectMeta: metav1.ObjectMeta{
Name: key.Name,
Namespace: key.Namespace,
},
Spec: v1alpha1.ClusterSpec{
Image: redpandaContainerImage,
Version: redpandaContainerTag,
Replicas: pointer.Int32Ptr(replicas),
Configuration: v1alpha1.RedpandaConfig{
KafkaAPI: []v1alpha1.KafkaAPI{
{
Port: kafkaPort,
TLS: v1alpha1.KafkaAPITLS{Enabled: true, RequireClientAuth: true},
},
},
AdminAPI: []v1alpha1.AdminAPI{{Port: adminPort}},
},
Resources: v1alpha1.RedpandaResourceRequirements{
ResourceRequirements: corev1.ResourceRequirements{
Limits: resources,
Requests: resources,
},
Redpanda: nil,
},
},
}
}

func findPort(ports []corev1.ServicePort, name string) int32 {
for _, port := range ports {
if port.Name == name {
Expand Down