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-rw-r--r--src/ncm/pkg/module/chaining.go209
1 files changed, 209 insertions, 0 deletions
diff --git a/src/ncm/pkg/module/chaining.go b/src/ncm/pkg/module/chaining.go
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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
+}