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change master service to headless service

This commit is contained in:
Chris Lu 2020-08-01 18:01:15 -07:00
parent bcd4d42404
commit f65a532f78
3 changed files with 200 additions and 28 deletions
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22
README.md Normal file
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@ -0,0 +1,22 @@
# SeaweedFS Operator
## Installation
## Development
Follow the instructions in https://sdk.operatorframework.io/docs/golang/quickstart/
```
$ git clone https://github.com/seaweedfs/seaweedfs-operator
$ cd seaweedfs-operator
# register the CRD with the Kubernetes
$ make install
# run the operator locally outside the Kubernetes cluster
$ make run ENABLE_WEBHOOKS=false
# From another terminal in the same directory
$ kubectl apply -f config/samples/objectstore_v100_master.yaml
```

25
controllers/objectstore/master_controller.go
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@ -23,10 +23,8 @@ import (
"github.com/go-logr/logr"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
@ -51,30 +49,17 @@ func (r *MasterReconciler) Reconcile(req ctrl.Request) (ctrl.Result, error) {
// your logic here
log.Info("start Reconcile ...")
master, done, result, err := r.findMasterInstance(req, ctx, log)
master, done, result, err := r.findMasterCustomResourceInstance(ctx, log, req)
if done {
return result, err
}
// Check if the deployment already exists, if not create a new one
found := &appsv1.Deployment{}
err = r.Get(ctx, types.NamespacedName{Name: master.Name, Namespace: master.Namespace}, found)
if err != nil && errors.IsNotFound(err) {
// Define a new deployment
dep := r.deploymentForMaster(master)
log.Info("Creating a new Deployment", "Deployment.Namespace", dep.Namespace, "Deployment.Name", dep.Name)
err = r.Create(ctx, dep)
if err != nil {
log.Error(err, "Failed to create new Deployment", "Deployment.Namespace", dep.Namespace, "Deployment.Name", dep.Name)
return ctrl.Result{}, err
if done, result, err = r.ensureMasterStatefulSet(ctx, log, master); done {
return result, err
}
// Deployment created successfully - return and requeue
return ctrl.Result{Requeue: true}, nil
} else if err != nil {
log.Error(err, "Failed to get Deployment")
return ctrl.Result{}, err
if done, result, err = r.ensureMasterService(ctx, log, master); done {
return result, err
}
log.Info("Get deployment " + found.Name)
// Update the Memcached status with the pod names
// List the pods for this memcached's deployment

179
controllers/objectstore/master_controller_ensure.go
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@ -5,15 +5,20 @@ import (
"time"
"github.com/go-logr/logr"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
"sigs.k8s.io/controller-runtime"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/intstr"
ctrl "sigs.k8s.io/controller-runtime"
"github.com/seaweedfs/seaweedfs-operator/apis/objectstore/v100"
objectstorev100 "github.com/seaweedfs/seaweedfs-operator/apis/objectstore/v100"
)
func (r *MasterReconciler) findMasterInstance(req controllerruntime.Request, ctx context.Context, log logr.Logger) (*v100.Master, bool, controllerruntime.Result, error) {
func (r *MasterReconciler) findMasterCustomResourceInstance(ctx context.Context, log logr.Logger, req ctrl.Request) (*objectstorev100.Master, bool, ctrl.Result, error) {
// fetch the master instance
master := &v100.Master{}
master := &objectstorev100.Master{}
err := r.Get(ctx, req.NamespacedName, master)
if err != nil {
if errors.IsNotFound(err) {
@ -21,12 +26,172 @@ func (r *MasterReconciler) findMasterInstance(req controllerruntime.Request, ctx
// Owned objects are automatically garbage collected. For additional cleanup logic use finalizers.
// Return and don't requeue
log.Info("Master resource not found. Ignoring since object must be deleted")
return nil, true, controllerruntime.Result{RequeueAfter: time.Second * 5}, nil
return nil, true, ctrl.Result{RequeueAfter: time.Second * 5}, nil
}
// Error reading the object - requeue the request.
log.Error(err, "Failed to get Master")
return nil, true, controllerruntime.Result{}, err
return nil, true, ctrl.Result{}, err
}
log.Info("Get master " + master.Name)
return master, false, controllerruntime.Result{}, nil
return master, false, ctrl.Result{}, nil
}
func (r *MasterReconciler) ensureMasterStatefulSet(ctx context.Context, log logr.Logger, master *objectstorev100.Master) (bool, ctrl.Result, error) {
// fetch the master instance
masterCluster := &appsv1.StatefulSet{}
err := r.Get(ctx, types.NamespacedName{Name: master.Name, Namespace: master.Namespace}, masterCluster)
if err != nil && errors.IsNotFound(err) {
// Define a new deployment
dep := r.createMasterStatefulSet(master)
log.Info("Creating a new master cluster statefulset", "Deployment.Namespace", dep.Namespace, "Deployment.Name", dep.Name)
err = r.Create(ctx, dep)
if err != nil {
log.Error(err, "Failed to create new Deployment", "Deployment.Namespace", dep.Namespace, "Deployment.Name", dep.Name)
return true, ctrl.Result{}, err
}
// Deployment created successfully - return and requeue
return true, ctrl.Result{Requeue: true}, nil
} else if err != nil {
log.Error(err, "Failed to get Deployment")
return true, ctrl.Result{}, err
}
log.Info("Get master cluster " + masterCluster.Name)
return false, ctrl.Result{}, nil
}
// deploymentForMaster returns a memcached Deployment object
func (r *MasterReconciler) createMasterStatefulSet(m *objectstorev100.Master) *appsv1.StatefulSet {
labels := lablesForMaster(m.Name)
replicas := int32(3)
enableServiceLinks := false
dep := &appsv1.StatefulSet{
ObjectMeta: metav1.ObjectMeta{
Name: m.Name,
Namespace: m.Namespace,
},
Spec: appsv1.StatefulSetSpec{
Replicas: &replicas,
Selector: &metav1.LabelSelector{
MatchLabels: labels,
},
Template: corev1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: labels,
},
Spec: corev1.PodSpec{
Volumes: nil,
InitContainers: nil,
Containers: []corev1.Container{{
Image: "chrislusf/seaweedfs:latest",
Name: "master",
Env: []corev1.EnvVar{
{
Name: "POD_IP",
ValueFrom: &corev1.EnvVarSource{
FieldRef: &corev1.ObjectFieldSelector{
FieldPath: "status.podIP",
},
},
},
{
Name: "POD_NAME",
ValueFrom: &corev1.EnvVarSource{
FieldRef: &corev1.ObjectFieldSelector{
FieldPath: "metadata.name",
},
},
},
{
Name: "NAMESPACE",
ValueFrom: &corev1.EnvVarSource{
FieldRef: &corev1.ObjectFieldSelector{
FieldPath: "metadata.namespace",
},
},
},
},
Command: []string{"weed", "master", "-volumeSizeLimitMB=1000", "-ip=${POD_NAME}"},
Ports: []corev1.ContainerPort{
{
ContainerPort: 9333,
Name: "swfs-master",
},
{
ContainerPort: 19333,
},
},
}},
EnableServiceLinks: &enableServiceLinks,
},
},
},
}
// Set master instance as the owner and controller
// ctrl.SetControllerReference(m, dep, r.Scheme)
return dep
}
func (r *MasterReconciler) ensureMasterService(ctx context.Context, log logr.Logger, master *objectstorev100.Master) (bool, ctrl.Result, error) {
// fetch the master instance
masterService := &corev1.Service{}
err := r.Get(ctx, types.NamespacedName{Name: master.Name, Namespace: master.Namespace}, masterService)
if err != nil && errors.IsNotFound(err) {
// Define a new deployment
dep := r.createMasterService(master)
log.Info("Creating a new master cluster statefulset", "Deployment.Namespace", dep.Namespace, "Deployment.Name", dep.Name)
err = r.Create(ctx, dep)
if err != nil {
log.Error(err, "Failed to create new Deployment", "Deployment.Namespace", dep.Namespace, "Deployment.Name", dep.Name)
return true, ctrl.Result{}, err
}
// Deployment created successfully - return and requeue
return true, ctrl.Result{Requeue: true}, nil
} else if err != nil {
log.Error(err, "Failed to get Deployment")
return true, ctrl.Result{}, err
}
log.Info("Get master cluster " + masterService.Name)
return false, ctrl.Result{}, nil
}
// deploymentForMaster returns a memcached Deployment object
func (r *MasterReconciler) createMasterService(m *objectstorev100.Master) *corev1.Service {
labels := lablesForMaster(m.Name)
dep := &corev1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: m.Name,
Namespace: m.Namespace,
},
Spec: corev1.ServiceSpec{
ClusterIP: "None",
Ports: []corev1.ServicePort{
{
Name: "swfs-master",
Protocol: corev1.Protocol("TCP"),
Port: 9333,
TargetPort: intstr.IntOrString{
Type: intstr.Int,
IntVal: 9333,
},
},
{
Name: "swfs-master-grpc",
Protocol: corev1.Protocol("TCP"),
Port: 19333,
TargetPort: intstr.IntOrString{
Type: intstr.Int,
IntVal: 19333,
},
},
},
Selector: labels,
},
}
// Set master instance as the owner and controller
// ctrl.SetControllerReference(m, dep, r.Scheme)
return dep
}