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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 (
"github.com/onap/multicloud-k8s/src/orchestrator/pkg/infra/db"
pkgerrors "github.com/pkg/errors"
)
// Chain defines the high level structure of a network chain document
type Chain struct {
Metadata Metadata `json:"metadata" yaml:"metadata"`
Spec NetworkChainingSpec `json:"spec" yaml:"spec"`
}
// NetworkChainingSpec contains the specification of a network chain
type NetworkChainingSpec struct {
ChainType string `json:"type"`
RoutingSpec RouteSpec `json:"routingSpec"`
}
// RouteSpec contains the routing specificaiton of a network chain
type RouteSpec struct {
LeftNetwork []RoutingNetwork `json:"leftNetwork"`
RightNetwork []RoutingNetwork `json:"rightNetwork"`
NetworkChain string `json:"networkChain"`
Namespace string `json:"namespace"`
}
// RoutingNetwork contains the route networkroute network details for en element of a network chain
type RoutingNetwork struct {
NetworkName string `json:"networkName"`
GatewayIP string `json:"gatewayIp"`
Subnet string `json:"subnet"`
}
// ChainKey is the key structure that is used in the database
type ChainKey struct {
Project string `json:"project"`
CompositeApp string `json:"compositeapp"`
CompositeAppVersion string `json:"compositeappversion"`
NetControlIntent string `json:"netcontrolintent"`
NetworkChain string `json:"networkchain"`
}
// CrChain is the structure for the Network Chain Custom Resource
type CrChain struct {
APIVersion string `yaml:"apiVersion"`
Kind string `yaml:"kind"`
Chain Chain
}
// RoutingChainType is currently only defined chaining type
const RoutingChainType = "routing"
// ChainingAPIVersion is the kubernetes version of a network chain custom resource
const ChainingAPIVersion = "k8s.plugin.opnfv.org/v1"
// ChainingKind is the Kind string for a network chain
const ChainingKind = "NetworkChaining"
// ChainManager is an interface exposing the Chain functionality
type ChainManager interface {
CreateChain(ch Chain, pr, ca, caver, netctrlint string, exists bool) (Chain, error)
GetChain(name, pr, ca, caver, netctrlint string) (Chain, error)
GetChains(pr, ca, caver, netctrlint string) ([]Chain, error)
DeleteChain(name, pr, ca, caver, netctrlint string) error
}
// ChainClient implements the Manager
// It will also be used to maintain some localized state
type ChainClient struct {
db ClientDbInfo
}
// NewChainClient returns an instance of the ChainClient
// which implements the Manager
func NewChainClient() *ChainClient {
return &ChainClient{
db: ClientDbInfo{
storeName: "orchestrator",
tagMeta: "chainmetadata",
},
}
}
// CreateChain - create a new Chain
func (v *ChainClient) CreateChain(ch Chain, pr, ca, caver, netctrlint string, exists bool) (Chain, error) {
//Construct key and tag to select the entry
key := ChainKey{
Project: pr,
CompositeApp: ca,
CompositeAppVersion: caver,
NetControlIntent: netctrlint,
NetworkChain: ch.Metadata.Name,
}
//Check if the Network Control Intent exists
_, err := NewNetControlIntentClient().GetNetControlIntent(netctrlint, pr, ca, caver)
if err != nil {
return Chain{}, pkgerrors.Errorf("Network Control Intent %v does not exist", netctrlint)
}
//Check if this Chain already exists
_, err = v.GetChain(ch.Metadata.Name, pr, ca, caver, netctrlint)
if err == nil && !exists {
return Chain{}, pkgerrors.New("Chain already exists")
}
err = db.DBconn.Insert(v.db.storeName, key, nil, v.db.tagMeta, ch)
if err != nil {
return Chain{}, pkgerrors.Wrap(err, "Creating DB Entry")
}
return ch, nil
}
// GetChain returns the Chain for corresponding name
func (v *ChainClient) GetChain(name, pr, ca, caver, netctrlint string) (Chain, error) {
//Construct key and tag to select the entry
key := ChainKey{
Project: pr,
CompositeApp: ca,
CompositeAppVersion: caver,
NetControlIntent: netctrlint,
NetworkChain: name,
}
value, err := db.DBconn.Find(v.db.storeName, key, v.db.tagMeta)
if err != nil {
return Chain{}, pkgerrors.Wrap(err, "Get Chain")
}
//value is a byte array
if value != nil {
ch := Chain{}
err = db.DBconn.Unmarshal(value[0], &ch)
if err != nil {
return Chain{}, pkgerrors.Wrap(err, "Unmarshalling Value")
}
return ch, nil
}
return Chain{}, pkgerrors.New("Error getting Chain")
}
// GetChains returns all of the Chains for for the given network control intent
func (v *ChainClient) GetChains(pr, ca, caver, netctrlint string) ([]Chain, error) {
//Construct key and tag to select the entry
key := ChainKey{
Project: pr,
CompositeApp: ca,
CompositeAppVersion: caver,
NetControlIntent: netctrlint,
NetworkChain: "",
}
var resp []Chain
values, err := db.DBconn.Find(v.db.storeName, key, v.db.tagMeta)
if err != nil {
return []Chain{}, pkgerrors.Wrap(err, "Get Chains")
}
for _, value := range values {
cp := Chain{}
err = db.DBconn.Unmarshal(value, &cp)
if err != nil {
return []Chain{}, pkgerrors.Wrap(err, "Unmarshalling Value")
}
resp = append(resp, cp)
}
return resp, nil
}
// DeleteChain deletes the Chain from the database
func (v *ChainClient) DeleteChain(name, pr, ca, caver, netctrlint string) error {
//Construct key and tag to select the entry
key := ChainKey{
Project: pr,
CompositeApp: ca,
CompositeAppVersion: caver,
NetControlIntent: netctrlint,
NetworkChain: name,
}
err := db.DBconn.Remove(v.db.storeName, key)
if err != nil {
return pkgerrors.Wrap(err, "Delete Chain Entry;")
}
return nil
}
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