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handler.go
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handler.go
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package druid
import (
"context"
"crypto/sha1"
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"regexp"
"sort"
autoscalev2beta2 "k8s.io/api/autoscaling/v2beta2"
networkingv1 "k8s.io/api/networking/v1"
storage "k8s.io/api/storage/v1"
"github.com/druid-io/druid-operator/apis/druid/v1alpha1"
appsv1 "k8s.io/api/apps/v1"
v1 "k8s.io/api/core/v1"
"k8s.io/api/policy/v1beta1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/intstr"
"sigs.k8s.io/controller-runtime/pkg/client"
logf "sigs.k8s.io/controller-runtime/pkg/log"
)
const (
druidOpResourceHash = "druidOpResourceHash"
broker = "broker"
coordinator = "coordinator"
overlord = "overlord"
middleManager = "middleManager"
indexer = "indexer"
historical = "historical"
router = "router"
defaultCommonConfigMountPath = "/druid/conf/druid/_common"
finalizerName = "deletepvc.finalizers.druid.apache.org"
)
var logger = logf.Log.WithName("druid_operator_handler")
func deployDruidCluster(sdk client.Client, m *v1alpha1.Druid, emitEvents EventEmitter) error {
if m.Spec.Ignored {
return nil
}
if err := verifyDruidSpec(m); err != nil {
e := fmt.Errorf("invalid DruidSpec[%s:%s] due to [%s]", m.Kind, m.Name, err.Error())
emitEvents.EmitEventGeneric(m, "DruidOperatorInvalidSpec", "", e)
return nil
}
allNodeSpecs, err := getAllNodeSpecsInDruidPrescribedOrder(m)
if err != nil {
e := fmt.Errorf("invalid DruidSpec[%s:%s] due to [%s]", m.Kind, m.Name, err.Error())
emitEvents.EmitEventGeneric(m, "DruidOperatorInvalidSpec", "", e)
return nil
}
statefulSetNames := make(map[string]bool)
deploymentNames := make(map[string]bool)
serviceNames := make(map[string]bool)
configMapNames := make(map[string]bool)
podDisruptionBudgetNames := make(map[string]bool)
hpaNames := make(map[string]bool)
ingressNames := make(map[string]bool)
pvcNames := make(map[string]bool)
ls := makeLabelsForDruid(m.Name)
commonConfig, err := makeCommonConfigMap(m, ls)
if err != nil {
return err
}
commonConfigSHA, err := getObjectHash(commonConfig)
if err != nil {
return err
}
if _, err := sdkCreateOrUpdateAsNeeded(sdk,
func() (object, error) { return makeCommonConfigMap(m, ls) },
func() object { return makeConfigMapEmptyObj() },
alwaysTrueIsEqualsFn, noopUpdaterFn, m, configMapNames, emitEvents); err != nil {
return err
}
/*
Default Behavior: Finalizer shall be always executed resulting in deletion of pvc post deletion of Druid CR
When the object (druid CR) has for deletion time stamp set, execute the finalizer
Finalizer shall execute the following flow :
1. Get sts List and PVC List
2. Range and Delete sts first and then delete pvc. PVC must be deleted after sts termination has been executed
else pvc finalizer shall block deletion since a pod/sts is referencing it.
3. Once delete is executed we block program and return.
*/
if m.Spec.DisablePVCDeletionFinalizer == false {
md := m.GetDeletionTimestamp() != nil
if md {
return executeFinalizers(sdk, m, emitEvents)
}
/*
If finalizer isn't present add it to object meta.
In case cr is already deleted do not call this function
*/
cr := checkIfCRExists(sdk, m, emitEvents)
if cr {
if !ContainsString(m.ObjectMeta.Finalizers, finalizerName) {
m.SetFinalizers(append(m.GetFinalizers(), finalizerName))
_, err := writers.Update(context.Background(), sdk, m, m, emitEvents)
if err != nil {
return err
}
}
}
}
for _, elem := range allNodeSpecs {
key := elem.key
nodeSpec := elem.spec
//Name in k8s must pass regex '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*'
//So this unique string must follow same.
nodeSpecUniqueStr := makeNodeSpecificUniqueString(m, key)
lm := makeLabelsForNodeSpec(&nodeSpec, m, m.Name, nodeSpecUniqueStr)
// create configmap first
nodeConfig, err := makeConfigMapForNodeSpec(&nodeSpec, m, lm, nodeSpecUniqueStr)
if err != nil {
return err
}
nodeConfigSHA, err := getObjectHash(nodeConfig)
if err != nil {
return err
}
if _, err := sdkCreateOrUpdateAsNeeded(sdk,
func() (object, error) { return nodeConfig, nil },
func() object { return makeConfigMapEmptyObj() },
alwaysTrueIsEqualsFn, noopUpdaterFn, m, configMapNames, emitEvents); err != nil {
return err
}
//create services before creating statefulset
firstServiceName := ""
services := firstNonNilValue(nodeSpec.Services, m.Spec.Services).([]v1.Service)
for _, svc := range services {
if _, err := sdkCreateOrUpdateAsNeeded(sdk,
func() (object, error) { return makeService(&svc, &nodeSpec, m, lm, nodeSpecUniqueStr) },
func() object { return makeServiceEmptyObj() }, alwaysTrueIsEqualsFn,
func(prev, curr object) { (curr.(*v1.Service)).Spec.ClusterIP = (prev.(*v1.Service)).Spec.ClusterIP },
m, serviceNames, emitEvents); err != nil {
return err
}
if firstServiceName == "" {
firstServiceName = svc.ObjectMeta.Name
}
}
nodeSpec.Ports = append(nodeSpec.Ports, v1.ContainerPort{ContainerPort: nodeSpec.DruidPort, Name: "druid-port"})
if nodeSpec.Kind == "Deployment" {
if deployCreateUpdateStatus, err := sdkCreateOrUpdateAsNeeded(sdk,
func() (object, error) {
return makeDeployment(&nodeSpec, m, lm, nodeSpecUniqueStr, fmt.Sprintf("%s-%s", commonConfigSHA, nodeConfigSHA), firstServiceName)
},
func() object { return makeDeploymentEmptyObj() },
deploymentIsEquals, noopUpdaterFn, m, deploymentNames, emitEvents); err != nil {
return err
} else if m.Spec.RollingDeploy {
if deployCreateUpdateStatus == resourceUpdated {
return nil
}
// Ignore isObjFullyDeployed() for the first iteration ie cluster creation
// will force cluster creation in parallel, post first iteration rolling updates
// will be sequential.
if m.Generation > 1 {
// Check Deployment rolling update status, if in-progress then stop here
done, err := isObjFullyDeployed(sdk, nodeSpec, nodeSpecUniqueStr, m, func() object { return makeDeploymentEmptyObj() }, emitEvents)
if !done {
return err
}
}
}
} else {
// scalePVCForSTS to be only called only if volumeExpansion is supported by the storage class.
// Ignore for the first iteration ie cluster creation, else get sts shall unnecessary log errors.
if m.Generation > 1 && m.Spec.ScalePvcSts {
if isVolumeExpansionEnabled(sdk, m, &nodeSpec, emitEvents) {
err := scalePVCForSts(sdk, &nodeSpec, nodeSpecUniqueStr, m, emitEvents)
if err != nil {
return err
}
}
}
// Create/Update StatefulSet
if stsCreateUpdateStatus, err := sdkCreateOrUpdateAsNeeded(sdk,
func() (object, error) {
return makeStatefulSet(&nodeSpec, m, lm, nodeSpecUniqueStr, fmt.Sprintf("%s-%s", commonConfigSHA, nodeConfigSHA), firstServiceName)
},
func() object { return makeStatefulSetEmptyObj() },
statefulSetIsEquals, noopUpdaterFn, m, statefulSetNames, emitEvents); err != nil {
return err
} else if m.Spec.RollingDeploy {
if stsCreateUpdateStatus == resourceUpdated {
// we just updated, give sts controller some time to update status of replicas after update
return nil
}
// Default is set to true
execCheckCrashStatus(sdk, &nodeSpec, m, emitEvents)
// Ignore isObjFullyDeployed() for the first iteration ie cluster creation
// will force cluster creation in parallel, post first iteration rolling updates
// will be sequential.
if m.Generation > 1 {
//Check StatefulSet rolling update status, if in-progress then stop here
done, err := isObjFullyDeployed(sdk, nodeSpec, nodeSpecUniqueStr, m, func() object { return makeStatefulSetEmptyObj() }, emitEvents)
if !done {
return err
}
}
}
// Default is set to true
execCheckCrashStatus(sdk, &nodeSpec, m, emitEvents)
}
// Create Ingress Spec
if nodeSpec.Ingress != nil {
if _, err := sdkCreateOrUpdateAsNeeded(sdk,
func() (object, error) {
return makeIngress(&nodeSpec, m, ls, nodeSpecUniqueStr)
},
func() object { return makeIngressEmptyObj() },
alwaysTrueIsEqualsFn, noopUpdaterFn, m, ingressNames, emitEvents); err != nil {
return err
}
}
// Create PodDisruptionBudget
if nodeSpec.PodDisruptionBudgetSpec != nil {
if _, err := sdkCreateOrUpdateAsNeeded(sdk,
func() (object, error) { return makePodDisruptionBudget(&nodeSpec, m, lm, nodeSpecUniqueStr) },
func() object { return makePodDisruptionBudgetEmptyObj() },
alwaysTrueIsEqualsFn, noopUpdaterFn, m, podDisruptionBudgetNames, emitEvents); err != nil {
return err
}
}
// Create HPA Spec
if nodeSpec.HPAutoScaler != nil {
if _, err := sdkCreateOrUpdateAsNeeded(sdk,
func() (object, error) {
return makeHorizontalPodAutoscaler(&nodeSpec, m, ls, nodeSpecUniqueStr)
},
func() object { return makeHorizontalPodAutoscalerEmptyObj() },
alwaysTrueIsEqualsFn, noopUpdaterFn, m, hpaNames, emitEvents); err != nil {
return err
}
}
if nodeSpec.PersistentVolumeClaim != nil {
for _, pvc := range nodeSpec.PersistentVolumeClaim {
if _, err := sdkCreateOrUpdateAsNeeded(sdk,
func() (object, error) { return makePersistentVolumeClaim(&pvc, &nodeSpec, m, lm, nodeSpecUniqueStr) },
func() object { return makePersistentVolumeClaimEmptyObj() }, alwaysTrueIsEqualsFn,
noopUpdaterFn,
m, pvcNames, emitEvents); err != nil {
return err
}
}
}
}
// Ignore on cluster creation
if m.Generation > 1 && m.Spec.DeleteOrphanPvc {
if err := deleteOrphanPVC(sdk, m, emitEvents); err != nil {
return err
}
}
//update status and delete unwanted resources
updatedStatus := v1alpha1.DruidClusterStatus{}
updatedStatus.StatefulSets = deleteUnusedResources(sdk, m, statefulSetNames, ls,
func() objectList { return makeStatefulSetListEmptyObj() },
func(listObj runtime.Object) []object {
items := listObj.(*appsv1.StatefulSetList).Items
result := make([]object, len(items))
for i := 0; i < len(items); i++ {
result[i] = &items[i]
}
return result
}, emitEvents)
sort.Strings(updatedStatus.StatefulSets)
updatedStatus.Deployments = deleteUnusedResources(sdk, m, deploymentNames, ls,
func() objectList { return makeDeloymentListEmptyObj() },
func(listObj runtime.Object) []object {
items := listObj.(*appsv1.DeploymentList).Items
result := make([]object, len(items))
for i := 0; i < len(items); i++ {
result[i] = &items[i]
}
return result
}, emitEvents)
sort.Strings(updatedStatus.Deployments)
updatedStatus.HPAutoScalers = deleteUnusedResources(sdk, m, hpaNames, ls,
func() objectList { return makeHorizontalPodAutoscalerListEmptyObj() },
func(listObj runtime.Object) []object {
items := listObj.(*autoscalev2beta2.HorizontalPodAutoscalerList).Items
result := make([]object, len(items))
for i := 0; i < len(items); i++ {
result[i] = &items[i]
}
return result
}, emitEvents)
sort.Strings(updatedStatus.HPAutoScalers)
updatedStatus.Ingress = deleteUnusedResources(sdk, m, ingressNames, ls,
func() objectList { return makeIngressListEmptyObj() },
func(listObj runtime.Object) []object {
items := listObj.(*networkingv1.IngressList).Items
result := make([]object, len(items))
for i := 0; i < len(items); i++ {
result[i] = &items[i]
}
return result
}, emitEvents)
sort.Strings(updatedStatus.Ingress)
updatedStatus.PodDisruptionBudgets = deleteUnusedResources(sdk, m, podDisruptionBudgetNames, ls,
func() objectList { return makePodDisruptionBudgetListEmptyObj() },
func(listObj runtime.Object) []object {
items := listObj.(*v1beta1.PodDisruptionBudgetList).Items
result := make([]object, len(items))
for i := 0; i < len(items); i++ {
result[i] = &items[i]
}
return result
}, emitEvents)
sort.Strings(updatedStatus.PodDisruptionBudgets)
updatedStatus.Services = deleteUnusedResources(sdk, m, serviceNames, ls,
func() objectList { return makeServiceListEmptyObj() },
func(listObj runtime.Object) []object {
items := listObj.(*v1.ServiceList).Items
result := make([]object, len(items))
for i := 0; i < len(items); i++ {
result[i] = &items[i]
}
return result
}, emitEvents)
sort.Strings(updatedStatus.Services)
updatedStatus.ConfigMaps = deleteUnusedResources(sdk, m, configMapNames, ls,
func() objectList { return makeConfigMapListEmptyObj() },
func(listObj runtime.Object) []object {
items := listObj.(*v1.ConfigMapList).Items
result := make([]object, len(items))
for i := 0; i < len(items); i++ {
result[i] = &items[i]
}
return result
}, emitEvents)
sort.Strings(updatedStatus.ConfigMaps)
podList, _ := readers.List(context.TODO(), sdk, m, makeLabelsForDruid(m.Name), emitEvents, func() objectList { return makePodList() }, func(listObj runtime.Object) []object {
items := listObj.(*v1.PodList).Items
result := make([]object, len(items))
for i := 0; i < len(items); i++ {
result[i] = &items[i]
}
return result
})
updatedStatus.Pods = getPodNames(podList)
sort.Strings(updatedStatus.Pods)
// All druid nodes are in Ready state.
// In case any druid node goes into a bad state, it shall be handled in above rollingDeploy block
updatedStatus.DruidNodeStatus = *newDruidNodeTypeStatus(v1.ConditionTrue, v1alpha1.DruidClusterReady, "", nil)
// In case of rolling Deploy not present OR any error not catched in the above block, check the pod ready
// state and condition and patch the status with the CR
for _, po := range podList {
for _, c := range po.(*v1.Pod).Status.Conditions {
if c.Type == v1.PodReady && c.Status == v1.ConditionFalse {
updatedStatus.DruidNodeStatus = *newDruidNodeTypeStatus(v1.ConditionTrue, v1alpha1.DruidNodeErrorState, po.GetName(), errors.New(c.Reason))
}
}
}
err = druidClusterStatusPatcher(sdk, updatedStatus, m, emitEvents)
if err != nil {
return err
}
return nil
}
func deleteSTSAndPVC(sdk client.Client, drd *v1alpha1.Druid, stsList, pvcList []object, emitEvents EventEmitter) error {
for _, sts := range stsList {
err := writers.Delete(context.TODO(), sdk, drd, sts, emitEvents, &client.DeleteAllOfOptions{})
if err != nil {
return err
}
}
for i := range pvcList {
err := writers.Delete(context.TODO(), sdk, drd, pvcList[i], emitEvents, &client.DeleteAllOfOptions{})
if err != nil {
return err
}
}
return nil
}
func checkIfCRExists(sdk client.Client, m *v1alpha1.Druid, emitEvents EventEmitter) bool {
_, err := readers.Get(context.TODO(), sdk, m.Name, m, func() object { return makeDruidEmptyObj() }, emitEvents)
if err != nil {
return false
} else {
return true
}
}
func deleteOrphanPVC(sdk client.Client, drd *v1alpha1.Druid, emitEvents EventEmitter) error {
podList, err := readers.List(context.TODO(), sdk, drd, makeLabelsForDruid(drd.Name), emitEvents, func() objectList { return makePodList() }, func(listObj runtime.Object) []object {
items := listObj.(*v1.PodList).Items
result := make([]object, len(items))
for i := 0; i < len(items); i++ {
result[i] = &items[i]
}
return result
})
if err != nil {
return err
}
pvcLabels := map[string]string{
"druid_cr": drd.Name,
}
pvcList, err := readers.List(context.TODO(), sdk, drd, pvcLabels, emitEvents, func() objectList { return makePersistentVolumeClaimListEmptyObj() }, func(listObj runtime.Object) []object {
items := listObj.(*v1.PersistentVolumeClaimList).Items
result := make([]object, len(items))
for i := 0; i < len(items); i++ {
result[i] = &items[i]
}
return result
})
if err != nil {
return err
}
// Fix: https://github.com/druid-io/druid-operator/issues/149
for _, pod := range podList {
if pod.(*v1.Pod).Status.Phase != v1.PodRunning {
return nil
}
for _, status := range pod.(*v1.Pod).Status.Conditions {
if status.Status != v1.ConditionTrue {
return nil
}
}
}
mountedPVC := make([]string, len(podList))
for _, pod := range podList {
if pod.(*v1.Pod).Spec.Volumes != nil {
for _, vol := range pod.(*v1.Pod).Spec.Volumes {
if vol.PersistentVolumeClaim != nil && pod.(*v1.Pod).Status.Phase != v1.PodPending {
if !ContainsString(mountedPVC, vol.PersistentVolumeClaim.ClaimName) {
mountedPVC = append(mountedPVC, vol.PersistentVolumeClaim.ClaimName)
}
}
}
}
}
if mountedPVC != nil {
for i, pvc := range pvcList {
if !ContainsString(mountedPVC, pvc.GetName()) {
err := writers.Delete(context.TODO(), sdk, drd, pvcList[i], emitEvents, &client.DeleteAllOfOptions{})
if err != nil {
return err
} else {
msg := fmt.Sprintf("Deleted orphaned pvc [%s:%s] successfully", pvcList[i].GetName(), drd.Namespace)
logger.Info(msg, "name", drd.Name, "namespace", drd.Namespace)
}
}
}
}
return nil
}
func executeFinalizers(sdk client.Client, m *v1alpha1.Druid, emitEvents EventEmitter) error {
if ContainsString(m.ObjectMeta.Finalizers, finalizerName) {
pvcLabels := map[string]string{
"druid_cr": m.Name,
}
pvcList, err := readers.List(context.TODO(), sdk, m, pvcLabels, emitEvents, func() objectList { return makePersistentVolumeClaimListEmptyObj() }, func(listObj runtime.Object) []object {
items := listObj.(*v1.PersistentVolumeClaimList).Items
result := make([]object, len(items))
for i := 0; i < len(items); i++ {
result[i] = &items[i]
}
return result
})
if err != nil {
return err
}
stsList, err := readers.List(context.TODO(), sdk, m, makeLabelsForDruid(m.Name), emitEvents, func() objectList { return makeStatefulSetListEmptyObj() }, func(listObj runtime.Object) []object {
items := listObj.(*appsv1.StatefulSetList).Items
result := make([]object, len(items))
for i := 0; i < len(items); i++ {
result[i] = &items[i]
}
return result
})
if err != nil {
return err
}
msg := fmt.Sprintf("Trigerring finalizer for CR [%s] in namespace [%s]", m.Name, m.Namespace)
// sendEvent(sdk, m, v1.EventTypeNormal, DruidFinalizer, msg)
logger.Info(msg)
if err := deleteSTSAndPVC(sdk, m, stsList, pvcList, emitEvents); err != nil {
return err
} else {
msg := fmt.Sprintf("Finalizer success for CR [%s] in namespace [%s]", m.Name, m.Namespace)
// sendEvent(sdk, m, v1.EventTypeNormal, DruidFinalizerSuccess, msg)
logger.Info(msg)
}
// remove our finalizer from the list and update it.
m.ObjectMeta.Finalizers = RemoveString(m.ObjectMeta.Finalizers, finalizerName)
_, err = writers.Update(context.TODO(), sdk, m, m, emitEvents)
if err != nil {
return err
}
}
return nil
}
func execCheckCrashStatus(sdk client.Client, nodeSpec *v1alpha1.DruidNodeSpec, m *v1alpha1.Druid, event EventEmitter) {
if m.Spec.ForceDeleteStsPodOnError == false {
return
} else {
if nodeSpec.PodManagementPolicy == "OrderedReady" {
checkCrashStatus(sdk, m, event)
}
}
}
func checkCrashStatus(sdk client.Client, drd *v1alpha1.Druid, emitEvents EventEmitter) error {
podList, err := readers.List(context.TODO(), sdk, drd, makeLabelsForDruid(drd.Name), emitEvents, func() objectList { return makePodList() }, func(listObj runtime.Object) []object {
items := listObj.(*v1.PodList).Items
result := make([]object, len(items))
for i := 0; i < len(items); i++ {
result[i] = &items[i]
}
return result
})
if err != nil {
return err
}
for _, p := range podList {
if p.(*v1.Pod).Status.ContainerStatuses[0].RestartCount > 1 {
for _, condition := range p.(*v1.Pod).Status.Conditions {
// condition.type Ready means the pod is able to service requests
if condition.Type == v1.ContainersReady {
// the below condition evalutes if a pod is in
// 1. pending state 2. failed state 3. unknown state
// OR condtion.status is false which evalutes if neither of these conditions are met
// 1. ContainersReady 2. PodInitialized 3. PodReady 4. PodScheduled
if p.(*v1.Pod).Status.Phase != v1.PodRunning || condition.Status == v1.ConditionFalse {
err := writers.Delete(context.TODO(), sdk, drd, p, emitEvents, &client.DeleteOptions{})
if err != nil {
return err
} else {
msg := fmt.Sprintf("Deleted pod [%s] in namespace [%s], since it was in crashloopback state.", p.GetName(), p.GetNamespace())
logger.Info(msg, "Object", stringifyForLogging(p, drd), "name", drd.Name, "namespace", drd.Namespace)
}
}
}
}
}
}
return nil
}
func deleteUnusedResources(sdk client.Client, drd *v1alpha1.Druid,
names map[string]bool, selectorLabels map[string]string, emptyListObjFn func() objectList, itemsExtractorFn func(obj runtime.Object) []object, emitEvents EventEmitter) []string {
listOpts := []client.ListOption{
client.InNamespace(drd.Namespace),
client.MatchingLabels(selectorLabels),
}
survivorNames := make([]string, 0, len(names))
listObj := emptyListObjFn()
if err := sdk.List(context.TODO(), listObj, listOpts...); err != nil {
e := fmt.Errorf("failed to list [%s] due to [%s]", listObj.GetObjectKind().GroupVersionKind().Kind, err.Error())
logger.Error(e, e.Error(), "name", drd.Name, "namespace", drd.Namespace)
} else {
for _, s := range itemsExtractorFn(listObj) {
if names[s.GetName()] == false {
err := writers.Delete(context.TODO(), sdk, drd, s, emitEvents, &client.DeleteOptions{})
if err != nil {
survivorNames = append(survivorNames, s.GetName())
}
} else {
survivorNames = append(survivorNames, s.GetName())
}
}
}
return survivorNames
}
func alwaysTrueIsEqualsFn(prev, curr object) bool {
return true
}
func noopUpdaterFn(prev, curr object) {
// do nothing
}
func sdkCreateOrUpdateAsNeeded(
sdk client.Client,
objFn func() (object, error),
emptyObjFn func() object,
isEqualFn func(prev, curr object) bool,
updaterFn func(prev, curr object),
drd *v1alpha1.Druid,
names map[string]bool,
emitEvent EventEmitter) (DruidNodeStatus, error) {
if obj, err := objFn(); err != nil {
return "", err
} else {
names[obj.GetName()] = true
addOwnerRefToObject(obj, asOwner(drd))
addHashToObject(obj)
prevObj := emptyObjFn()
if err := sdk.Get(context.TODO(), *namespacedName(obj.GetName(), obj.GetNamespace()), prevObj); err != nil {
if apierrors.IsNotFound(err) {
// resource does not exist, create it.
create, err := writers.Create(context.TODO(), sdk, drd, obj, emitEvent)
if err != nil {
return "", err
} else {
return create, nil
}
} else {
e := fmt.Errorf("Failed to get [%s:%s] due to [%s].", obj.GetObjectKind().GroupVersionKind().Kind, obj.GetName(), err.Error())
logger.Error(e, e.Error(), "Prev object", stringifyForLogging(prevObj, drd), "name", drd.Name, "namespace", drd.Namespace)
emitEvent.EmitEventGeneric(drd, string(druidOjectGetFail), "", err)
return "", e
}
} else {
// resource already exists, updated it if needed
if obj.GetAnnotations()[druidOpResourceHash] != prevObj.GetAnnotations()[druidOpResourceHash] || !isEqualFn(prevObj, obj) {
obj.SetResourceVersion(prevObj.GetResourceVersion())
updaterFn(prevObj, obj)
update, err := writers.Update(context.TODO(), sdk, drd, obj, emitEvent)
if err != nil {
return "", err
} else {
return update, err
}
} else {
return "", nil
}
}
}
}
func isObjFullyDeployed(sdk client.Client, nodeSpec v1alpha1.DruidNodeSpec, nodeSpecUniqueStr string, drd *v1alpha1.Druid, emptyObjFn func() object, emitEvent EventEmitter) (bool, error) {
// Get Object
obj, err := readers.Get(context.TODO(), sdk, nodeSpecUniqueStr, drd, emptyObjFn, emitEvent)
if err != nil {
return false, err
}
// In case obj is a statefulset or deployment, make sure the sts/deployment has successfully reconciled to desired state
// TODO: @AdheipSingh once https://github.com/kubernetes/kubernetes/blob/master/pkg/apis/apps/types.go#L217 k8s conditions detect sts fail errors.
if detectType(obj) == "*v1.StatefulSet" {
if obj.(*appsv1.StatefulSet).Status.CurrentRevision != obj.(*appsv1.StatefulSet).Status.UpdateRevision {
return false, nil
} else if obj.(*appsv1.StatefulSet).Status.CurrentReplicas != obj.(*appsv1.StatefulSet).Status.ReadyReplicas {
return false, nil
} else {
return obj.(*appsv1.StatefulSet).Status.CurrentRevision == obj.(*appsv1.StatefulSet).Status.UpdateRevision, nil
}
} else if detectType(obj) == "*v1.Deployment" {
for _, condition := range obj.(*appsv1.Deployment).Status.Conditions {
// This detects a failure condition, operator should send a rolling deployment failed event
if condition.Type == appsv1.DeploymentReplicaFailure {
return false, errors.New(condition.Reason)
} else if condition.Type == appsv1.DeploymentProgressing && condition.Status != v1.ConditionTrue || obj.(*appsv1.Deployment).Status.ReadyReplicas != obj.(*appsv1.Deployment).Status.Replicas {
return false, nil
} else {
return obj.(*appsv1.Deployment).Status.ReadyReplicas == obj.(*appsv1.Deployment).Status.Replicas, nil
}
}
}
return false, nil
}
// scalePVCForSts shall expand the sts volumeclaimtemplates size as well as N no of pvc supported by the sts.
// NOTE: To be called only if generation > 1
func scalePVCForSts(sdk client.Client, nodeSpec *v1alpha1.DruidNodeSpec, nodeSpecUniqueStr string, drd *v1alpha1.Druid, emitEvent EventEmitter) error {
getSTSList, err := readers.List(context.TODO(), sdk, drd, makeLabelsForDruid(drd.Name), emitEvent, func() objectList { return makeStatefulSetListEmptyObj() }, func(listObj runtime.Object) []object {
items := listObj.(*appsv1.StatefulSetList).Items
result := make([]object, len(items))
for i := 0; i < len(items); i++ {
result[i] = &items[i]
}
return result
})
if err != nil {
return nil
}
// Dont proceed unless all statefulsets are up and running.
// This can cause the go routine to panic
for _, sts := range getSTSList {
if sts.(*appsv1.StatefulSet).Status.Replicas != sts.(*appsv1.StatefulSet).Status.ReadyReplicas {
return nil
}
}
// return nil, in case return err the program halts since sts would not be able
// we would like the operator to create sts.
sts, err := readers.Get(context.TODO(), sdk, nodeSpecUniqueStr, drd, func() object { return makeStatefulSetEmptyObj() }, emitEvent)
if err != nil {
return nil
}
pvcLabels := map[string]string{
"component": nodeSpec.NodeType,
}
pvcList, err := readers.List(context.TODO(), sdk, drd, pvcLabels, emitEvent, func() objectList { return makePersistentVolumeClaimListEmptyObj() }, func(listObj runtime.Object) []object {
items := listObj.(*v1.PersistentVolumeClaimList).Items
result := make([]object, len(items))
for i := 0; i < len(items); i++ {
result[i] = &items[i]
}
return result
})
if err != nil {
return nil
}
desVolumeClaimTemplateSize, currVolumeClaimTemplateSize, pvcSize := getVolumeClaimTemplateSizes(sts, nodeSpec, pvcList)
// current number of PVC can't be less than desired number of pvc
if len(pvcSize) < len(desVolumeClaimTemplateSize) {
return nil
}
// iterate over array for matching each index in desVolumeClaimTemplateSize, currVolumeClaimTemplateSize and pvcSize
for i := range desVolumeClaimTemplateSize {
// Validate Request, shrinking of pvc not supported
// desired size cant be less than current size
// in that case re-create sts/pvc which is a user execute manual step
desiredSize, _ := desVolumeClaimTemplateSize[i].AsInt64()
currentSize, _ := currVolumeClaimTemplateSize[i].AsInt64()
if desiredSize < currentSize {
e := fmt.Errorf("Request for Shrinking of sts pvc size [sts:%s] in [namespace:%s] is not Supported", sts.(*appsv1.StatefulSet).Name, sts.(*appsv1.StatefulSet).Namespace)
logger.Error(e, e.Error(), "name", drd.Name, "namespace", drd.Namespace)
emitEvent.EmitEventGeneric(drd, "DruidOperatorPvcReSizeFail", "", err)
return e
}
// In case size dont match and dessize > currsize, delete the sts using casacde=false / propagation policy set to orphan
// The operator on next reconcile shall create the sts with latest changes
if desiredSize != currentSize {
msg := fmt.Sprintf("Detected Change in VolumeClaimTemplate Sizes for Statefuleset [%s] in Namespace [%s], desVolumeClaimTemplateSize: [%s], currVolumeClaimTemplateSize: [%s]\n, deleteing STS [%s] with casacde=false]", sts.(*appsv1.StatefulSet).Name, sts.(*appsv1.StatefulSet).Namespace, desVolumeClaimTemplateSize[i].String(), currVolumeClaimTemplateSize[i].String(), sts.(*appsv1.StatefulSet).Name)
logger.Info(msg)
emitEvent.EmitEventGeneric(drd, "DruidOperatorPvcReSizeDetected", msg, nil)
if err := writers.Delete(context.TODO(), sdk, drd, sts, emitEvent, client.PropagationPolicy(metav1.DeletePropagationOrphan)); err != nil {
return err
} else {
msg := fmt.Sprintf("[StatefuleSet:%s] successfully deleted with casacde=false", sts.(*appsv1.StatefulSet).Name)
logger.Info(msg, "name", drd.Name, "namespace", drd.Namespace)
emitEvent.EmitEventGeneric(drd, "DruidOperatorStsOrphaned", msg, nil)
}
}
// In case size dont match, patch the pvc with the desiredsize from druid CR
for p := range pvcSize {
pSize, _ := pvcSize[p].AsInt64()
if desiredSize != pSize {
// use deepcopy
patch := client.MergeFrom(pvcList[p].(*v1.PersistentVolumeClaim).DeepCopy())
pvcList[p].(*v1.PersistentVolumeClaim).Spec.Resources.Requests[v1.ResourceStorage] = desVolumeClaimTemplateSize[i]
if err := writers.Patch(context.TODO(), sdk, drd, pvcList[p].(*v1.PersistentVolumeClaim), false, patch, emitEvent); err != nil {
return err
} else {
msg := fmt.Sprintf("[PVC:%s] successfully Patched with [Size:%s]", pvcList[p].(*v1.PersistentVolumeClaim).Name, desVolumeClaimTemplateSize[i].String())
logger.Info(msg, "name", drd.Name, "namespace", drd.Namespace)
}
}
}
}
return nil
}
// desVolumeClaimTemplateSize: the druid CR holds this value for a sts volumeclaimtemplate
// currVolumeClaimTemplateSize: the sts owned by druid CR holds this value in volumeclaimtemplate
// pvcSize: the pvc referenced by the sts holds this value
// type of vars is resource.Quantity. ref: https://godoc.org/k8s.io/apimachinery/pkg/api/resource
func getVolumeClaimTemplateSizes(sts object, nodeSpec *v1alpha1.DruidNodeSpec, pvc []object) (desVolumeClaimTemplateSize, currVolumeClaimTemplateSize, pvcSize []resource.Quantity) {
for i := range nodeSpec.VolumeClaimTemplates {
desVolumeClaimTemplateSize = append(desVolumeClaimTemplateSize, nodeSpec.VolumeClaimTemplates[i].Spec.Resources.Requests[v1.ResourceStorage])
}
for i := range sts.(*appsv1.StatefulSet).Spec.VolumeClaimTemplates {
currVolumeClaimTemplateSize = append(currVolumeClaimTemplateSize, sts.(*appsv1.StatefulSet).Spec.VolumeClaimTemplates[i].Spec.Resources.Requests[v1.ResourceStorage])
}
for i := range pvc {
pvcSize = append(pvcSize, pvc[i].(*v1.PersistentVolumeClaim).Spec.Resources.Requests[v1.ResourceStorage])
}
return desVolumeClaimTemplateSize, currVolumeClaimTemplateSize, pvcSize
}
func isVolumeExpansionEnabled(sdk client.Client, m *v1alpha1.Druid, nodeSpec *v1alpha1.DruidNodeSpec, emitEvent EventEmitter) bool {
for _, nodeVCT := range nodeSpec.VolumeClaimTemplates {
sc, err := readers.Get(context.TODO(), sdk, *nodeVCT.Spec.StorageClassName, m, func() object { return makeStorageClassEmptyObj() }, emitEvent)
if err != nil {
return false
}
if sc.(*storage.StorageClass).AllowVolumeExpansion != boolFalse() {
return true
}
}
return false
}
func stringifyForLogging(obj object, drd *v1alpha1.Druid) string {
if bytes, err := json.Marshal(obj); err != nil {
logger.Error(err, err.Error(), fmt.Sprintf("Failed to serialize [%s:%s]", obj.GetObjectKind().GroupVersionKind().Kind, obj.GetName()), "name", drd.Name, "namespace", drd.Namespace)
return fmt.Sprintf("%v", obj)
} else {
return string(bytes)
}
}
func addHashToObject(obj object) error {
if sha, err := getObjectHash(obj); err != nil {
return err
} else {
annotations := obj.GetAnnotations()
if annotations == nil {
annotations = make(map[string]string)
obj.SetAnnotations(annotations)
}
annotations[druidOpResourceHash] = sha
return nil
}
}
func getObjectHash(obj object) (string, error) {
if bytes, err := json.Marshal(obj); err != nil {
return "", err
} else {
sha1Bytes := sha1.Sum(bytes)
return base64.StdEncoding.EncodeToString(sha1Bytes[:]), nil
}
}
func makeNodeSpecificUniqueString(m *v1alpha1.Druid, key string) string {
return fmt.Sprintf("druid-%s-%s", m.Name, key)
}
func makeCommonConfigMap(m *v1alpha1.Druid, ls map[string]string) (*v1.ConfigMap, error) {
prop := m.Spec.CommonRuntimeProperties
if m.Spec.Zookeeper != nil {
if zm, err := createZookeeperManager(m.Spec.Zookeeper); err != nil {
return nil, err
} else {
prop = prop + "\n" + zm.Configuration() + "\n"
}
}
if m.Spec.MetadataStore != nil {
if msm, err := createMetadataStoreManager(m.Spec.MetadataStore); err != nil {
return nil, err
} else {
prop = prop + "\n" + msm.Configuration() + "\n"
}
}
if m.Spec.DeepStorage != nil {
if dsm, err := createDeepStorageManager(m.Spec.DeepStorage); err != nil {
return nil, err
} else {
prop = prop + "\n" + dsm.Configuration() + "\n"
}
}
data := map[string]string{
"common.runtime.properties": prop,
}
if m.Spec.DimensionsMapPath != "" {
data["metricDimensions.json"] = m.Spec.DimensionsMapPath
}
cfg, err := makeConfigMap(
fmt.Sprintf("%s-druid-common-config", m.ObjectMeta.Name),
m.Namespace,
ls,
data)
return cfg, err
}
func makeConfigMapForNodeSpec(nodeSpec *v1alpha1.DruidNodeSpec, m *v1alpha1.Druid, lm map[string]string, nodeSpecUniqueStr string) (*v1.ConfigMap, error) {
data := map[string]string{
"runtime.properties": fmt.Sprintf("druid.port=%d\n%s", nodeSpec.DruidPort, nodeSpec.RuntimeProperties),
"jvm.config": fmt.Sprintf("%s\n%s", firstNonEmptyStr(nodeSpec.JvmOptions, m.Spec.JvmOptions), nodeSpec.ExtraJvmOptions),
}
log4jconfig := firstNonEmptyStr(nodeSpec.Log4jConfig, m.Spec.Log4jConfig)
if log4jconfig != "" {
data["log4j2.xml"] = log4jconfig
}
return makeConfigMap(
fmt.Sprintf("%s-config", nodeSpecUniqueStr),
m.Namespace,
lm,
data)
}
func makeConfigMap(name string, namespace string, labels map[string]string, data map[string]string) (*v1.ConfigMap, error) {
return &v1.ConfigMap{
TypeMeta: metav1.TypeMeta{
APIVersion: "v1",
Kind: "ConfigMap",
},
ObjectMeta: metav1.ObjectMeta{
Name: name,
Namespace: namespace,
Labels: labels,