// 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
}
// 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)
}
}