Golang ResourceList Examples

Example #1

File: spawner_rc.go Project: calvix/kanto

// create pvc claim for couchdb pod, used for rc spawner
// pvc name is automatically generated by kubernetes
// @param cluster *CouchdbCluster - cluster that will be using this pvc
// @return *api.PersistentVolumeClaim - filled pvc claim struct ready to be created
func (cluster *CouchdbCluster) CouchdbPVClaim() *api.PersistentVolumeClaim {
	// resource list
	rsList := make(api.ResourceList)
	// SIZE
	rsList[api.ResourceStorage] = *(resource.NewQuantity(COUCHDB_VOLUME_SIZE, resource.BinarySI))

	// pvc SPEC, witch readWriteOnce access mode
	pvcSpec := api.PersistentVolumeClaimSpec{AccessModes: []api.PersistentVolumeAccessMode{api.ReadWriteOnce}}
	pvcSpec.Resources.Requests = api.ResourceList(rsList)
	// PVC
	pvc := api.PersistentVolumeClaim{Spec: pvcSpec}
	pvc.GenerateName = CLUSTER_PREFIX + cluster.Tag + "-"
	pvc.Labels = cluster.Labels

	return &pvc
}

Example #2

File: spawner_petset.go Project: calvix/kanto

// PetSet - available only in kubernetes v1.3+
// big advantage: it allow create persistentVolume template
// this template can create persistent volumeClaim for each POD automatically
//
// create petSet for couchdb cluster
// init all necessary struct for petSet and then via kube client creates it
// @ param cluster - struct CouchdbCluster - required:
// @return extensions.Deployment - created kube deployment
// @return error - errors that occur during creation
//
func (cluster *CouchdbCluster) CreatePetSet() (*apps.PetSet, error) {
	/*
		PET SET, included in kube 1.3+
		http://kubernetes-v1-3.github.io/docs/user-guide/petset/
		// TESTING - ALPHA
	*/
	// pod template with volumes
	podTemplate := *cluster.CouchdbPodTemplate(true, CLUSTER_PREFIX+cluster.Tag)
	// pet set spec label selector
	lSelector := unversioned.LabelSelector{MatchLabels: cluster.Labels}

	// pvc claim
	pvc := api.PersistentVolumeClaim{}
	pvc.Name = CLUSTER_PREFIX + cluster.Tag
	pvc.Annotations = make(map[string]string)
	pvc.Annotations["volume.alpha.kubernetes.io/storage-class"] = "anything"

	// resource list for pvc claim template
	rsList := make(api.ResourceList)
	// SIZE
	rsList[api.ResourceStorage] = *(resource.NewQuantity(5*1024*1024*1024, resource.BinarySI))
	// pvc SPEC
	pvcSpec := api.PersistentVolumeClaimSpec{}
	pvcSpec.Resources.Requests = api.ResourceList(rsList)

	pvc.Spec = pvcSpec
	// pet set specs
	petSetSPec := apps.PetSetSpec{Replicas: int(cluster.Replicas), Template: podTemplate,
		Selector: &lSelector, VolumeClaimTemplates: []api.PersistentVolumeClaim{pvc}}

	// pet set
	petSet := apps.PetSet{Spec: petSetSPec}
	petSet.Name = CLUSTER_PREFIX + cluster.Tag
	petSet.Labels = cluster.Labels

	// get a new kube extensions client
	c, err := KubeClientApps(KUBE_API)
	// check for errors
	if err != nil {
		ErrorLog("kube_control: createPetSet: Cannot connect to Kubernetes api ")
		ErrorLog(err)
		return nil, err
	} else {
		// create deployment
		return c.PetSets(cluster.Namespace).Create(&petSet)
	}
}