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ingester.go
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ingester.go
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package manifests
import (
"fmt"
"path"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
policyv1 "k8s.io/api/policy/v1"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/util/intstr"
"k8s.io/utils/pointer"
"sigs.k8s.io/controller-runtime/pkg/client"
"github.com/grafana/loki/operator/internal/manifests/internal/config"
"github.com/grafana/loki/operator/internal/manifests/storage"
)
// BuildIngester builds the k8s objects required to run Loki Ingester
func BuildIngester(opts Options) ([]client.Object, error) {
statefulSet := NewIngesterStatefulSet(opts)
if opts.Gates.HTTPEncryption {
if err := configureIngesterHTTPServicePKI(statefulSet, opts); err != nil {
return nil, err
}
}
if err := storage.ConfigureStatefulSet(statefulSet, opts.ObjectStorage, opts.Gates.OpenShift.Enabled); err != nil {
return nil, err
}
if opts.Gates.GRPCEncryption {
if err := configureIngesterGRPCServicePKI(statefulSet, opts); err != nil {
return nil, err
}
}
if opts.Gates.HTTPEncryption || opts.Gates.GRPCEncryption {
caBundleName := signingCABundleName(opts.Name)
if err := configureServiceCA(&statefulSet.Spec.Template.Spec, caBundleName); err != nil {
return nil, err
}
}
if opts.Gates.RestrictedPodSecurityStandard {
if err := configurePodSpecForRestrictedStandard(&statefulSet.Spec.Template.Spec); err != nil {
return nil, err
}
}
if err := configureHashRingEnv(&statefulSet.Spec.Template.Spec, opts); err != nil {
return nil, err
}
if err := configureProxyEnv(&statefulSet.Spec.Template.Spec, opts); err != nil {
return nil, err
}
if err := configureReplication(&statefulSet.Spec.Template, opts.Stack.Replication, LabelIngesterComponent, opts.Name); err != nil {
return nil, err
}
return []client.Object{
statefulSet,
NewIngesterGRPCService(opts),
NewIngesterHTTPService(opts),
newIngesterPodDisruptionBudget(opts),
}, nil
}
// NewIngesterStatefulSet creates a deployment object for an ingester
func NewIngesterStatefulSet(opts Options) *appsv1.StatefulSet {
l := ComponentLabels(LabelIngesterComponent, opts.Name)
a := commonAnnotations(opts.ConfigSHA1, opts.ObjectStorage.SecretSHA1, opts.CertRotationRequiredAt)
podSpec := corev1.PodSpec{
Affinity: configureAffinity(LabelIngesterComponent, opts.Name, opts.Gates.DefaultNodeAffinity, opts.Stack.Template.Ingester),
Volumes: []corev1.Volume{
{
Name: configVolumeName,
VolumeSource: corev1.VolumeSource{
ConfigMap: &corev1.ConfigMapVolumeSource{
DefaultMode: &defaultConfigMapMode,
LocalObjectReference: corev1.LocalObjectReference{
Name: lokiConfigMapName(opts.Name),
},
},
},
},
},
Containers: []corev1.Container{
{
Image: opts.Image,
Name: "loki-ingester",
Resources: corev1.ResourceRequirements{
Limits: opts.ResourceRequirements.Ingester.Limits,
Requests: opts.ResourceRequirements.Ingester.Requests,
},
Args: []string{
"-target=ingester",
fmt.Sprintf("-config.file=%s", path.Join(config.LokiConfigMountDir, config.LokiConfigFileName)),
fmt.Sprintf("-runtime-config.file=%s", path.Join(config.LokiConfigMountDir, config.LokiRuntimeConfigFileName)),
"-config.expand-env=true",
},
ReadinessProbe: lokiReadinessProbe(),
LivenessProbe: lokiLivenessProbe(),
Ports: []corev1.ContainerPort{
{
Name: lokiHTTPPortName,
ContainerPort: httpPort,
Protocol: protocolTCP,
},
{
Name: lokiGRPCPortName,
ContainerPort: grpcPort,
Protocol: protocolTCP,
},
{
Name: lokiGossipPortName,
ContainerPort: gossipPort,
Protocol: protocolTCP,
},
},
VolumeMounts: []corev1.VolumeMount{
{
Name: configVolumeName,
ReadOnly: false,
MountPath: config.LokiConfigMountDir,
},
{
Name: storageVolumeName,
ReadOnly: false,
MountPath: dataDirectory,
},
{
Name: walVolumeName,
ReadOnly: false,
MountPath: walDirectory,
},
},
TerminationMessagePath: "/dev/termination-log",
TerminationMessagePolicy: "File",
ImagePullPolicy: "IfNotPresent",
},
},
}
if opts.Stack.Template != nil && opts.Stack.Template.Ingester != nil {
podSpec.Tolerations = opts.Stack.Template.Ingester.Tolerations
podSpec.NodeSelector = opts.Stack.Template.Ingester.NodeSelector
}
return &appsv1.StatefulSet{
TypeMeta: metav1.TypeMeta{
Kind: "StatefulSet",
APIVersion: appsv1.SchemeGroupVersion.String(),
},
ObjectMeta: metav1.ObjectMeta{
Name: IngesterName(opts.Name),
Labels: l,
},
Spec: appsv1.StatefulSetSpec{
PodManagementPolicy: appsv1.OrderedReadyPodManagement,
RevisionHistoryLimit: pointer.Int32(10),
Replicas: pointer.Int32(opts.Stack.Template.Ingester.Replicas),
Selector: &metav1.LabelSelector{
MatchLabels: labels.Merge(l, GossipLabels()),
},
Template: corev1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("loki-ingester-%s", opts.Name),
Labels: labels.Merge(l, GossipLabels()),
Annotations: a,
},
Spec: podSpec,
},
VolumeClaimTemplates: []corev1.PersistentVolumeClaim{
{
ObjectMeta: metav1.ObjectMeta{
Labels: l,
Name: storageVolumeName,
},
Spec: corev1.PersistentVolumeClaimSpec{
AccessModes: []corev1.PersistentVolumeAccessMode{
// TODO: should we verify that this is possible with the given storage class first?
corev1.ReadWriteOnce,
},
Resources: corev1.ResourceRequirements{
Requests: map[corev1.ResourceName]resource.Quantity{
corev1.ResourceStorage: opts.ResourceRequirements.Ingester.PVCSize,
},
},
StorageClassName: pointer.String(opts.Stack.StorageClassName),
VolumeMode: &volumeFileSystemMode,
},
},
{
ObjectMeta: metav1.ObjectMeta{
Labels: l,
Name: walVolumeName,
},
Spec: corev1.PersistentVolumeClaimSpec{
AccessModes: []corev1.PersistentVolumeAccessMode{
// TODO: should we verify that this is possible with the given storage class first?
corev1.ReadWriteOnce,
},
Resources: corev1.ResourceRequirements{
Requests: map[corev1.ResourceName]resource.Quantity{
corev1.ResourceStorage: opts.ResourceRequirements.WALStorage.PVCSize,
},
},
StorageClassName: pointer.String(opts.Stack.StorageClassName),
VolumeMode: &volumeFileSystemMode,
},
},
},
},
}
}
// NewIngesterGRPCService creates a k8s service for the ingester GRPC endpoint
func NewIngesterGRPCService(opts Options) *corev1.Service {
labels := ComponentLabels(LabelIngesterComponent, opts.Name)
return &corev1.Service{
TypeMeta: metav1.TypeMeta{
Kind: "Service",
APIVersion: corev1.SchemeGroupVersion.String(),
},
ObjectMeta: metav1.ObjectMeta{
Name: serviceNameIngesterGRPC(opts.Name),
Labels: labels,
},
Spec: corev1.ServiceSpec{
ClusterIP: "None",
Ports: []corev1.ServicePort{
{
Name: lokiGRPCPortName,
Port: grpcPort,
Protocol: protocolTCP,
TargetPort: intstr.IntOrString{IntVal: grpcPort},
},
},
Selector: labels,
},
}
}
// NewIngesterHTTPService creates a k8s service for the ingester HTTP endpoint
func NewIngesterHTTPService(opts Options) *corev1.Service {
serviceName := serviceNameIngesterHTTP(opts.Name)
labels := ComponentLabels(LabelIngesterComponent, opts.Name)
return &corev1.Service{
TypeMeta: metav1.TypeMeta{
Kind: "Service",
APIVersion: corev1.SchemeGroupVersion.String(),
},
ObjectMeta: metav1.ObjectMeta{
Name: serviceName,
Labels: labels,
},
Spec: corev1.ServiceSpec{
Ports: []corev1.ServicePort{
{
Name: lokiHTTPPortName,
Port: httpPort,
Protocol: protocolTCP,
TargetPort: intstr.IntOrString{IntVal: httpPort},
},
},
Selector: labels,
},
}
}
func configureIngesterHTTPServicePKI(statefulSet *appsv1.StatefulSet, opts Options) error {
serviceName := serviceNameIngesterHTTP(opts.Name)
return configureHTTPServicePKI(&statefulSet.Spec.Template.Spec, serviceName)
}
func configureIngesterGRPCServicePKI(sts *appsv1.StatefulSet, opts Options) error {
serviceName := serviceNameIngesterGRPC(opts.Name)
return configureGRPCServicePKI(&sts.Spec.Template.Spec, serviceName)
}
// newIngesterPodDisruptionBudget returns a PodDisruptionBudget for the LokiStack
// Ingester pods.
func newIngesterPodDisruptionBudget(opts Options) *policyv1.PodDisruptionBudget {
l := ComponentLabels(LabelIngesterComponent, opts.Name)
// Default to 1 if not defined in ResourceRequirementsTable for a given size
mu := intstr.FromInt(1)
if opts.ResourceRequirements.Ingester.PDBMinAvailable > 0 {
mu = intstr.FromInt(opts.ResourceRequirements.Ingester.PDBMinAvailable)
}
return &policyv1.PodDisruptionBudget{
TypeMeta: metav1.TypeMeta{
Kind: "PodDisruptionBudget",
APIVersion: policyv1.SchemeGroupVersion.String(),
},
ObjectMeta: metav1.ObjectMeta{
Labels: l,
Name: IngesterName(opts.Name),
Namespace: opts.Namespace,
},
Spec: policyv1.PodDisruptionBudgetSpec{
Selector: &metav1.LabelSelector{
MatchLabels: l,
},
MinAvailable: &mu,
},
}
}