Move cluster management into its own microservice

Split out the cluster provider and cluster APIs
and packages into a separate microservice to align
with the architecture.

Issue-ID: MULTICLOUD-1029
Signed-off-by: Eric Multanen <eric.w.multanen@intel.com>
Change-Id: I08f357b5a488004a2389b72a178ae33e101d1540

1 files changed, 485 insertions, 0 deletions

diff --git a/src/clm/api/clusterhandler.go b/src/clm/api/clusterhandler.go
new file mode 100644
index 00000000..84dd3230
--- /dev/null
+++ b/src/clm/api/clusterhandler.go
@@ -0,0 +1,485 @@
+/*
+ * 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 (
+	"bytes"
+	"encoding/base64"
+	"encoding/json"
+	"io"
+	"io/ioutil"
+	"mime"
+	"mime/multipart"
+	"net/http"
+	"net/textproto"
+
+	clusterPkg "github.com/onap/multicloud-k8s/src/clm/pkg/cluster"
+
+	"github.com/gorilla/mux"
+)
+
+// Used to store backend implementations objects
+// Also simplifies mocking for unit testing purposes
+type clusterHandler struct {
+	// Interface that implements Cluster operations
+	// We will set this variable with a mock interface for testing
+	client clusterPkg.ClusterManager
+}
+
+// Create handles creation of the ClusterProvider entry in the database
+func (h clusterHandler) createClusterProviderHandler(w http.ResponseWriter, r *http.Request) {
+	var p clusterPkg.ClusterProvider
+
+	err := json.NewDecoder(r.Body).Decode(&p)
+
+	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 p.Metadata.Name == "" {
+		http.Error(w, "Missing name in POST request", http.StatusBadRequest)
+		return
+	}
+
+	ret, err := h.client.CreateClusterProvider(p)
+	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 ClusterProvider Name
+// Returns a ClusterProvider
+func (h clusterHandler) getClusterProviderHandler(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	name := vars["name"]
+	var ret interface{}
+	var err error
+
+	if len(name) == 0 {
+		ret, err = h.client.GetClusterProviders()
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+	} else {
+		ret, err = h.client.GetClusterProvider(name)
+		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 ClusterProvider  Name
+func (h clusterHandler) deleteClusterProviderHandler(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	name := vars["name"]
+
+	err := h.client.DeleteClusterProvider(name)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	w.WriteHeader(http.StatusNoContent)
+}
+
+// Create handles creation of the Cluster entry in the database
+func (h clusterHandler) createClusterHandler(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	provider := vars["provider-name"]
+	var p clusterPkg.Cluster
+	var q clusterPkg.ClusterContent
+
+	// Implemenation using multipart form
+	// Review and enable/remove at a later date
+	// Set Max size to 16mb here
+	err := r.ParseMultipartForm(16777216)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusUnprocessableEntity)
+		return
+	}
+
+	jsn := bytes.NewBuffer([]byte(r.FormValue("metadata")))
+	err = json.NewDecoder(jsn).Decode(&p)
+	switch {
+	case err == io.EOF:
+		http.Error(w, "Empty body", http.StatusBadRequest)
+		return
+	case err != nil:
+		http.Error(w, err.Error(), http.StatusUnprocessableEntity)
+		return
+	}
+
+	//Read the file section and ignore the header
+	file, _, err := r.FormFile("file")
+	if err != nil {
+		http.Error(w, "Unable to process file", http.StatusUnprocessableEntity)
+		return
+	}
+
+	defer file.Close()
+
+	//Convert the file content to base64 for storage
+	content, err := ioutil.ReadAll(file)
+	if err != nil {
+		http.Error(w, "Unable to read file", http.StatusUnprocessableEntity)
+		return
+	}
+
+	q.Kubeconfig = base64.StdEncoding.EncodeToString(content)
+
+	// Name is required.
+	if p.Metadata.Name == "" {
+		http.Error(w, "Missing name in POST request", http.StatusBadRequest)
+		return
+	}
+
+	ret, err := h.client.CreateCluster(provider, p, q)
+	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 Cluster Name
+// Returns a Cluster
+func (h clusterHandler) getClusterHandler(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	provider := vars["provider-name"]
+	name := vars["name"]
+
+	label := r.URL.Query().Get("label")
+	if len(label) != 0 {
+		ret, err := h.client.GetClustersWithLabel(provider, label)
+		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
+		}
+		return
+	}
+
+	// handle the get all clusters case - return a list of only the json parts
+	if len(name) == 0 {
+		var retList []clusterPkg.Cluster
+
+		ret, err := h.client.GetClusters(provider)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+
+		for _, cl := range ret {
+			retList = append(retList, clusterPkg.Cluster{Metadata: cl.Metadata})
+		}
+
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		err = json.NewEncoder(w).Encode(retList)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		return
+	}
+
+	accepted, _, err := mime.ParseMediaType(r.Header.Get("Accept"))
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusNotAcceptable)
+		return
+	}
+
+	retCluster, err := h.client.GetCluster(provider, name)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	retKubeconfig, err := h.client.GetClusterContent(provider, name)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	switch accepted {
+	case "multipart/form-data":
+		mpw := multipart.NewWriter(w)
+		w.Header().Set("Content-Type", mpw.FormDataContentType())
+		w.WriteHeader(http.StatusOK)
+		pw, err := mpw.CreatePart(textproto.MIMEHeader{"Content-Type": {"application/json"}, "Content-Disposition": {"form-data; name=metadata"}})
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		if err := json.NewEncoder(pw).Encode(retCluster); err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		pw, err = mpw.CreatePart(textproto.MIMEHeader{"Content-Type": {"application/octet-stream"}, "Content-Disposition": {"form-data; name=file; filename=kubeconfig"}})
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		kcBytes, err := base64.StdEncoding.DecodeString(retKubeconfig.Kubeconfig)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		_, err = pw.Write(kcBytes)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+	case "application/json":
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		err = json.NewEncoder(w).Encode(retCluster)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+	case "application/octet-stream":
+		w.Header().Set("Content-Type", "application/octet-stream")
+		w.WriteHeader(http.StatusOK)
+		kcBytes, err := base64.StdEncoding.DecodeString(retKubeconfig.Kubeconfig)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		_, err = w.Write(kcBytes)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+	default:
+		http.Error(w, "set Accept: multipart/form-data, application/json or application/octet-stream", http.StatusMultipleChoices)
+		return
+	}
+}
+
+// Delete handles DELETE operations on a particular Cluster Name
+func (h clusterHandler) deleteClusterHandler(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	provider := vars["provider-name"]
+	name := vars["name"]
+
+	err := h.client.DeleteCluster(provider, name)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	w.WriteHeader(http.StatusNoContent)
+}
+
+// Create handles creation of the ClusterLabel entry in the database
+func (h clusterHandler) createClusterLabelHandler(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	provider := vars["provider-name"]
+	cluster := vars["cluster-name"]
+	var p clusterPkg.ClusterLabel
+
+	err := json.NewDecoder(r.Body).Decode(&p)
+
+	// LabelName is required.
+	if p.LabelName == "" {
+		http.Error(w, "Missing label name in POST request", http.StatusBadRequest)
+		return
+	}
+
+	ret, err := h.client.CreateClusterLabel(provider, cluster, p)
+	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 Cluster Label
+// Returns a ClusterLabel
+func (h clusterHandler) getClusterLabelHandler(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	provider := vars["provider-name"]
+	cluster := vars["cluster-name"]
+	label := vars["label"]
+
+	var ret interface{}
+	var err error
+
+	if len(label) == 0 {
+		ret, err = h.client.GetClusterLabels(provider, cluster)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+	} else {
+		ret, err = h.client.GetClusterLabel(provider, cluster, label)
+		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 ClusterLabel Name
+func (h clusterHandler) deleteClusterLabelHandler(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	provider := vars["provider-name"]
+	cluster := vars["cluster-name"]
+	label := vars["label"]
+
+	err := h.client.DeleteClusterLabel(provider, cluster, label)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	w.WriteHeader(http.StatusNoContent)
+}
+
+// Create handles creation of the ClusterKvPairs entry in the database
+func (h clusterHandler) createClusterKvPairsHandler(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	provider := vars["provider-name"]
+	cluster := vars["cluster-name"]
+	var p clusterPkg.ClusterKvPairs
+
+	err := json.NewDecoder(r.Body).Decode(&p)
+
+	// KvPairsName is required.
+	if p.Metadata.Name == "" {
+		http.Error(w, "Missing Key Value pair name in POST request", http.StatusBadRequest)
+		return
+	}
+
+	ret, err := h.client.CreateClusterKvPairs(provider, cluster, p)
+	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 Cluster Key Value Pair
+// Returns a ClusterKvPairs
+func (h clusterHandler) getClusterKvPairsHandler(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	provider := vars["provider-name"]
+	cluster := vars["cluster-name"]
+	kvpair := vars["kvpair"]
+
+	var ret interface{}
+	var err error
+
+	if len(kvpair) == 0 {
+		ret, err = h.client.GetAllClusterKvPairs(provider, cluster)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+	} else {
+		ret, err = h.client.GetClusterKvPairs(provider, cluster, kvpair)
+		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 Cluster Name
+func (h clusterHandler) deleteClusterKvPairsHandler(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	provider := vars["provider-name"]
+	cluster := vars["cluster-name"]
+	kvpair := vars["kvpair"]
+
+	err := h.client.DeleteClusterKvPairs(provider, cluster, kvpair)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	w.WriteHeader(http.StatusNoContent)
+}