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/*
* Copyright 2020 Intel Corporation, Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package module
import (
pkgerrors "github.com/pkg/errors"
)
// Cluster contains the parameters needed for a Cluster
type Cluster struct {
MetaData ClusterMeta `json:"metadata"`
Specification ClusterSpec `json:"spec"`
}
type ClusterMeta struct {
ClusterReference string `json:"name"`
Description string `json:"description"`
UserData1 string `json:"userData1"`
UserData2 string `json:"userData2"`
}
type ClusterSpec struct {
ClusterProvider string `json:"cluster-provider"`
ClusterName string `json:"cluster-name"`
LoadBalancerIP string `json:"loadbalancer-ip"`
}
type ClusterKey struct {
Project string `json:"project"`
LogicalCloudName string `json:"logical-cloud-name"`
ClusterReference string `json:"clname"`
}
// ClusterManager is an interface that exposes the connection
// functionality
type ClusterManager interface {
CreateCluster(project, logicalCloud string, c Cluster) (Cluster, error)
GetCluster(project, logicalCloud, name string) (Cluster, error)
GetAllClusters(project, logicalCloud string) ([]Cluster, error)
DeleteCluster(project, logicalCloud, name string) error
UpdateCluster(project, logicalCloud, name string, c Cluster) (Cluster, error)
}
// ClusterClient implements the ClusterManager
// It will also be used to maintain some localized state
type ClusterClient struct {
storeName string
tagMeta string
util Utility
}
// ClusterClient returns an instance of the ClusterClient
// which implements the ClusterManager
func NewClusterClient() *ClusterClient {
service := DBService{}
return &ClusterClient{
storeName: "orchestrator",
tagMeta: "cluster",
util: service,
}
}
// Create entry for the cluster reference resource in the database
func (v *ClusterClient) CreateCluster(project, logicalCloud string, c Cluster) (Cluster, error) {
//Construct key consisting of name
key := ClusterKey{
Project: project,
LogicalCloudName: logicalCloud,
ClusterReference: c.MetaData.ClusterReference,
}
//Check if project exists
err := v.util.CheckProject(project)
if err != nil {
return Cluster{}, pkgerrors.New("Unable to find the project")
}
//check if logical cloud exists
err = v.util.CheckLogicalCloud(project, logicalCloud)
if err != nil {
return Cluster{}, pkgerrors.New("Unable to find the logical cloud")
}
//Check if this Cluster reference already exists
_, err = v.GetCluster(project, logicalCloud, c.MetaData.ClusterReference)
if err == nil {
return Cluster{}, pkgerrors.New("Cluster reference already exists")
}
err = v.util.DBInsert(v.storeName, key, nil, v.tagMeta, c)
if err != nil {
return Cluster{}, pkgerrors.Wrap(err, "Creating DB Entry")
}
return c, nil
}
// Get returns Cluster for corresponding cluster reference
func (v *ClusterClient) GetCluster(project, logicalCloud, clusterReference string) (Cluster, error) {
//Construct the composite key to select the entry
key := ClusterKey{
Project: project,
LogicalCloudName: logicalCloud,
ClusterReference: clusterReference,
}
value, err := v.util.DBFind(v.storeName, key, v.tagMeta)
if err != nil {
return Cluster{}, pkgerrors.Wrap(err, "Get Cluster reference")
}
//value is a byte array
if value != nil {
cl := Cluster{}
err = v.util.DBUnmarshal(value[0], &cl)
if err != nil {
return Cluster{}, pkgerrors.Wrap(err, "Unmarshaling value")
}
return cl, nil
}
return Cluster{}, pkgerrors.New("Cluster Reference does not exist")
}
// GetAll returns all cluster references in the logical cloud
func (v *ClusterClient) GetAllClusters(project, logicalCloud string) ([]Cluster, error) {
//Construct the composite key to select clusters
key := ClusterKey{
Project: project,
LogicalCloudName: logicalCloud,
ClusterReference: "",
}
var resp []Cluster
values, err := v.util.DBFind(v.storeName, key, v.tagMeta)
if err != nil {
return []Cluster{}, pkgerrors.Wrap(err, "Get All Cluster references")
}
if len(values) == 0 {
return []Cluster{}, pkgerrors.New("No Cluster References associated")
}
for _, value := range values {
cl := Cluster{}
err = v.util.DBUnmarshal(value, &cl)
if err != nil {
return []Cluster{}, pkgerrors.Wrap(err, "Unmarshaling values")
}
resp = append(resp, cl)
}
return resp, nil
}
// Delete the Cluster reference entry from database
func (v *ClusterClient) DeleteCluster(project, logicalCloud, clusterReference string) error {
//Construct the composite key to select the entry
key := ClusterKey{
Project: project,
LogicalCloudName: logicalCloud,
ClusterReference: clusterReference,
}
err := v.util.DBRemove(v.storeName, key)
if err != nil {
return pkgerrors.Wrap(err, "Delete Cluster Reference")
}
return nil
}
// Update an entry for the Cluster reference in the database
func (v *ClusterClient) UpdateCluster(project, logicalCloud, clusterReference string, c Cluster) (Cluster, error) {
key := ClusterKey{
Project: project,
LogicalCloudName: logicalCloud,
ClusterReference: clusterReference,
}
//Check for name mismatch in cluster reference
if c.MetaData.ClusterReference != clusterReference {
return Cluster{}, pkgerrors.New("Cluster Reference mismatch")
}
//Check if this Cluster reference exists
_, err := v.GetCluster(project, logicalCloud, clusterReference)
if err != nil {
return Cluster{}, pkgerrors.New("Cluster Reference does not exist")
}
err = v.util.DBInsert(v.storeName, key, nil, v.tagMeta, c)
if err != nil {
return Cluster{}, pkgerrors.Wrap(err, "Updating DB Entry")
}
return c, nil
}
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