Create OVN network action controller from ncm

Split out part of ncm microservice to act as the
Onv4k8s network action controller for the orchestrator.
No code changes really - just moving around to fit the
architectural plan.

Issue-ID: MULTICLOUD-1029
Signed-off-by: Eric Multanen <eric.w.multanen@intel.com>
Change-Id: I17292ac72d041050269f05fc4a0c2a6ca741aeb5

1 files changed, 290 insertions, 0 deletions

diff --git a/src/ovnaction/api/chainhandler.go b/src/ovnaction/api/chainhandler.go
new file mode 100644
index 00000000..52ed18e5
--- /dev/null
+++ b/src/ovnaction/api/chainhandler.go
@@ -0,0 +1,290 @@
+/*
+ * 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 api
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+
+	moduleLib "github.com/onap/multicloud-k8s/src/ovnaction/pkg/module"
+	"github.com/onap/multicloud-k8s/src/orchestrator/pkg/infra/validation"
+	pkgerrors "github.com/pkg/errors"
+
+	"github.com/gorilla/mux"
+)
+
+// Used to store backend implementations objects
+// Also simplifies mocking for unit testing purposes
+type chainHandler struct {
+	// Interface that implements workload intent operations
+	// We will set this variable with a mock interface for testing
+	client moduleLib.ChainManager
+}
+
+func validateRoutingNetwork(r moduleLib.RoutingNetwork) error {
+	errs := validation.IsValidName(r.NetworkName)
+	if len(errs) > 0 {
+		return pkgerrors.Errorf("Invalid routing network name: %v", errs)
+	}
+
+	err := validation.IsIpv4Cidr(r.Subnet)
+	if err != nil {
+		return pkgerrors.Wrap(err, "Invalid routing network subnet")
+	}
+
+	err = validation.IsIpv4(r.GatewayIP)
+	if err != nil {
+		return pkgerrors.Wrap(err, "Invalid routing network gateway IP")
+	}
+
+	return nil
+}
+
+// validateNetworkChain checks that the network chain string input follows the
+// generic format:  "app=app1,net1,app=app2,net2, ..... ,netN-1,app=appN"
+// assume "app=app1" can conform to validation.IsValidLabel() with an "="
+func validateNetworkChain(chain string) error {
+	elems := strings.Split(chain, ",")
+
+	// chain needs at least two apps and a network
+	if len(elems) < 3 {
+		return pkgerrors.Errorf("Network chain is too short")
+	}
+
+	// chain needs to have an odd number of elements
+	if len(elems)%2 == 0 {
+		return pkgerrors.Errorf("Invalid network chain - even number of elements")
+	}
+
+	for i, s := range elems {
+		// allows whitespace in comma separated elements
+		t := strings.TrimSpace(s)
+		// if even element, verify a=b format
+		if i%2 == 0 {
+			if strings.Index(t, "=") < 1 {
+				return pkgerrors.Errorf("Invalid deployment label element of network chain")
+			}
+			errs := validation.IsValidLabel(t)
+			if len(errs) > 0 {
+				return pkgerrors.Errorf("Invalid deployment label element: %v", errs)
+			}
+		} else {
+			errs := validation.IsValidName(t)
+			if len(errs) > 0 {
+				return pkgerrors.Errorf("Invalid network element of network chain: %v", errs)
+			}
+		}
+	}
+	return nil
+}
+
+// Check for valid format of input parameters
+func validateChainInputs(ch moduleLib.Chain) error {
+	// validate metadata
+	err := moduleLib.IsValidMetadata(ch.Metadata)
+	if err != nil {
+		return pkgerrors.Wrap(err, "Invalid network chain metadata")
+	}
+
+	if strings.ToLower(ch.Spec.ChainType) != moduleLib.RoutingChainType {
+		return pkgerrors.Wrap(err, "Invalid network chain type")
+	}
+
+	for _, r := range ch.Spec.RoutingSpec.LeftNetwork {
+		err = validateRoutingNetwork(r)
+		if err != nil {
+			return err
+		}
+	}
+
+	for _, r := range ch.Spec.RoutingSpec.RightNetwork {
+		err = validateRoutingNetwork(r)
+		if err != nil {
+			return err
+		}
+	}
+
+	err = validateNetworkChain(ch.Spec.RoutingSpec.NetworkChain)
+	if err != nil {
+		return err
+	}
+
+	errs := validation.IsValidName(ch.Spec.RoutingSpec.Namespace)
+	if len(errs) > 0 {
+		return pkgerrors.Errorf("Invalid network chain route spec namespace: %v", errs)
+	}
+
+	return nil
+}
+
+// Create handles creation of the Chain entry in the database
+func (h chainHandler) createHandler(w http.ResponseWriter, r *http.Request) {
+	var ch moduleLib.Chain
+	vars := mux.Vars(r)
+	project := vars["project"]
+	compositeApp := vars["composite-app-name"]
+	compositeAppVersion := vars["version"]
+	netControlIntent := vars["net-control-intent"]
+
+	err := json.NewDecoder(r.Body).Decode(&ch)
+
+	switch {
+	case err == io.EOF:
+		http.Error(w, "Empty body", http.StatusBadRequest)
+		return
+	case err != nil:
+		http.Error(w, err.Error(), http.StatusUnprocessableEntity)
+		return
+	}
+
+	// Name is required.
+	if ch.Metadata.Name == "" {
+		http.Error(w, "Missing name in POST request", http.StatusBadRequest)
+		return
+	}
+
+	err = validateChainInputs(ch)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	ret, err := h.client.CreateChain(ch, project, compositeApp, compositeAppVersion, netControlIntent, false)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusCreated)
+	err = json.NewEncoder(w).Encode(ret)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+}
+
+// Put handles creation/update of the Chain entry in the database
+func (h chainHandler) putHandler(w http.ResponseWriter, r *http.Request) {
+	var ch moduleLib.Chain
+	vars := mux.Vars(r)
+	name := vars["name"]
+	project := vars["project"]
+	compositeApp := vars["composite-app-name"]
+	compositeAppVersion := vars["version"]
+	netControlIntent := vars["net-control-intent"]
+
+	err := json.NewDecoder(r.Body).Decode(&ch)
+
+	switch {
+	case err == io.EOF:
+		http.Error(w, "Empty body", http.StatusBadRequest)
+		return
+	case err != nil:
+		http.Error(w, err.Error(), http.StatusUnprocessableEntity)
+		return
+	}
+
+	// Name is required.
+	if ch.Metadata.Name == "" {
+		http.Error(w, "Missing name in PUT request", http.StatusBadRequest)
+		return
+	}
+
+	// Name in URL should match name in body
+	if ch.Metadata.Name != name {
+		fmt.Printf("bodyname = %v, name= %v\n", ch.Metadata.Name, name)
+		http.Error(w, "Mismatched name in PUT request", http.StatusBadRequest)
+		return
+	}
+
+	err = validateChainInputs(ch)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	ret, err := h.client.CreateChain(ch, project, compositeApp, compositeAppVersion, netControlIntent, true)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusCreated)
+	err = json.NewEncoder(w).Encode(ret)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+}
+
+// Get handles GET operations on a particular Chain Name
+// Returns a Chain
+func (h chainHandler) getHandler(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	name := vars["name"]
+	project := vars["project"]
+	compositeApp := vars["composite-app-name"]
+	compositeAppVersion := vars["version"]
+	netControlIntent := vars["net-control-intent"]
+	var ret interface{}
+	var err error
+
+	if len(name) == 0 {
+		ret, err = h.client.GetChains(project, compositeApp, compositeAppVersion, netControlIntent)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+	} else {
+		ret, err = h.client.GetChain(name, project, compositeApp, compositeAppVersion, netControlIntent)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusOK)
+	err = json.NewEncoder(w).Encode(ret)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+}
+
+// Delete handles DELETE operations on a particular Chain
+func (h chainHandler) deleteHandler(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	name := vars["name"]
+	project := vars["project"]
+	compositeApp := vars["composite-app-name"]
+	compositeAppVersion := vars["version"]
+	netControlIntent := vars["net-control-intent"]
+
+	err := h.client.DeleteChain(name, project, compositeApp, compositeAppVersion, netControlIntent)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	w.WriteHeader(http.StatusNoContent)
+}