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329 lines
9.6 KiB
329 lines
9.6 KiB
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package main
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import (
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"encoding/json"
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"flag"
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"fmt"
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"io"
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"io/ioutil"
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"log"
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"net"
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"net/http"
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"os"
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"strings"
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"github.com/ghodss/yaml"
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"github.com/gorilla/mux"
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"github.com/kubernetes/deployment-manager/manager/manager"
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"github.com/kubernetes/deployment-manager/manager/repository"
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"github.com/kubernetes/deployment-manager/util"
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)
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var deployments = []Route{
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{"ListDeployments", "/deployments", "GET", listDeploymentsHandlerFunc, ""},
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{"GetDeployment", "/deployments/{deployment}", "GET", getDeploymentHandlerFunc, ""},
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{"CreateDeployment", "/deployments", "POST", createDeploymentHandlerFunc, "JSON"},
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{"DeleteDeployment", "/deployments/{deployment}", "DELETE", deleteDeploymentHandlerFunc, ""},
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{"PutDeployment", "/deployments/{deployment}", "PUT", putDeploymentHandlerFunc, "JSON"},
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{"ListManifests", "/deployments/{deployment}/manifests", "GET", listManifestsHandlerFunc, ""},
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{"GetManifest", "/deployments/{deployment}/manifests/{manifest}", "GET", getManifestHandlerFunc, ""},
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{"Expand", "/expand", "POST", expandHandlerFunc, ""},
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{"ListTypes", "/types", "GET", listTypesHandlerFunc, ""},
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{"ListTypeInstances", "/types/{type}/instances", "GET", listTypeInstancesHandlerFunc, ""},
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}
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var (
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maxLength = flag.Int64("maxLength", 1024, "The maximum length (KB) of a template.")
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expanderName = flag.String("expander", "expandybird-service", "The DNS name of the expander service.")
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expanderURL = flag.String("expanderURL", "", "The URL for the expander service.")
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deployerName = flag.String("deployer", "resourcifier-service", "The DNS name of the deployer service.")
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deployerURL = flag.String("deployerURL", "", "The URL for the deployer service.")
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)
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var backend manager.Manager
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func init() {
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if !flag.Parsed() {
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flag.Parse()
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}
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routes = append(routes, deployments...)
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backend = newManager()
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}
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func newManager() manager.Manager {
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expander := manager.NewExpander(getServiceURL(*expanderURL, *expanderName), manager.NewTypeResolver())
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deployer := manager.NewDeployer(getServiceURL(*deployerURL, *deployerName))
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r := repository.NewMapBasedRepository()
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return manager.NewManager(expander, deployer, r)
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}
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func getServiceURL(serviceURL, serviceName string) string {
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if serviceURL == "" {
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serviceURL = makeEnvVariableURL(serviceName)
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if serviceURL == "" {
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addrs, err := net.LookupHost(serviceName)
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if err != nil || len(addrs) < 1 {
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log.Fatalf("cannot resolve service:%v. environment:%v", serviceName, os.Environ())
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}
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serviceURL = fmt.Sprintf("https://%s", addrs[0])
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}
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}
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return serviceURL
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}
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// makeEnvVariableURL takes a service name and returns the value of the
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// environment variable that identifies its URL, if it exists, or the empty
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// string, if it doesn't.
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func makeEnvVariableURL(str string) string {
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prefix := makeEnvVariableName(str)
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url := os.Getenv(prefix + "_PORT")
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return strings.Replace(url, "tcp", "http", 1)
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}
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// makeEnvVariableName is copied from the Kubernetes source,
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// which is referenced by the documentation for service environment variables.
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func makeEnvVariableName(str string) string {
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// TODO: If we simplify to "all names are DNS1123Subdomains" this
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// will need two tweaks:
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// 1) Handle leading digits
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// 2) Handle dots
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return strings.ToUpper(strings.Replace(str, "-", "_", -1))
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}
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func listDeploymentsHandlerFunc(w http.ResponseWriter, r *http.Request) {
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handler := "manager: list deployments"
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util.LogHandlerEntry(handler, r)
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l, err := backend.ListDeployments()
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if err != nil {
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util.LogAndReturnError(handler, http.StatusInternalServerError, err, w)
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return
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}
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var names []string
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for _, d := range l {
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names = append(names, d.Name)
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}
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util.LogHandlerExitWithJSON(handler, w, names, http.StatusOK)
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}
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func getDeploymentHandlerFunc(w http.ResponseWriter, r *http.Request) {
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handler := "manager: get deployment"
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util.LogHandlerEntry(handler, r)
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name, err := getPathVariable(w, r, "deployment", handler)
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if err != nil {
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return
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}
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d, err := backend.GetDeployment(name)
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if err != nil {
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util.LogAndReturnError(handler, http.StatusBadRequest, err, w)
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return
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}
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util.LogHandlerExitWithJSON(handler, w, d, http.StatusOK)
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}
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func createDeploymentHandlerFunc(w http.ResponseWriter, r *http.Request) {
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handler := "manager: create deployment"
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util.LogHandlerEntry(handler, r)
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defer r.Body.Close()
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t := getTemplate(w, r, handler)
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if t != nil {
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d, err := backend.CreateDeployment(t)
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if err != nil {
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util.LogAndReturnError(handler, http.StatusBadRequest, err, w)
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return
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}
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util.LogHandlerExitWithJSON(handler, w, d, http.StatusCreated)
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return
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}
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}
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func deleteDeploymentHandlerFunc(w http.ResponseWriter, r *http.Request) {
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handler := "manager: delete deployment"
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util.LogHandlerEntry(handler, r)
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defer r.Body.Close()
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name, err := getPathVariable(w, r, "deployment", handler)
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if err != nil {
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return
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}
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d, err := backend.DeleteDeployment(name, true)
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if err != nil {
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util.LogAndReturnError(handler, http.StatusBadRequest, err, w)
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return
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}
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util.LogHandlerExitWithJSON(handler, w, d, http.StatusOK)
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}
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func putDeploymentHandlerFunc(w http.ResponseWriter, r *http.Request) {
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handler := "manager: update deployment"
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util.LogHandlerEntry(handler, r)
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defer r.Body.Close()
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name, err := getPathVariable(w, r, "deployment", handler)
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if err != nil {
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return
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}
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t := getTemplate(w, r, handler)
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if t != nil {
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d, err := backend.PutDeployment(name, t)
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if err != nil {
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util.LogAndReturnError(handler, http.StatusBadRequest, err, w)
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return
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}
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util.LogHandlerExitWithJSON(handler, w, d, http.StatusCreated)
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}
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}
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func getPathVariable(w http.ResponseWriter, r *http.Request, variable, handler string) (string, error) {
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vars := mux.Vars(r)
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variable, ok := vars[variable]
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if !ok {
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e := fmt.Errorf("%s parameter not found in URL", variable)
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util.LogAndReturnError(handler, http.StatusBadRequest, e, w)
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return "", e
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}
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return variable, nil
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}
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func getTemplate(w http.ResponseWriter, r *http.Request, handler string) *manager.Template {
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util.LogHandlerEntry(handler, r)
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b := io.LimitReader(r.Body, *maxLength*1024)
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y, err := ioutil.ReadAll(b)
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if err != nil {
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util.LogAndReturnError(handler, http.StatusBadRequest, err, w)
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return nil
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}
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// Reject the input if it exceeded the length limit,
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// since we may not have read all of it into the buffer.
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if _, err = b.Read(make([]byte, 0, 1)); err != io.EOF {
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e := fmt.Errorf("template exceeds maximum length of %d KB", *maxLength)
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util.LogAndReturnError(handler, http.StatusBadRequest, e, w)
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return nil
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}
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if err := r.Body.Close(); err != nil {
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util.LogAndReturnError(handler, http.StatusInternalServerError, err, w)
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return nil
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}
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j, err := yaml.YAMLToJSON(y)
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if err != nil {
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e := fmt.Errorf("%v\n%v", err, string(y))
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util.LogAndReturnError(handler, http.StatusBadRequest, e, w)
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return nil
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}
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t := &manager.Template{}
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if err := json.Unmarshal(j, t); err != nil {
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e := fmt.Errorf("%v\n%v", err, string(j))
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util.LogAndReturnError(handler, http.StatusBadRequest, e, w)
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return nil
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}
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return t
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}
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func listManifestsHandlerFunc(w http.ResponseWriter, r *http.Request) {
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handler := "manager: list manifests"
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util.LogHandlerEntry(handler, r)
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deploymentName, err := getPathVariable(w, r, "deployment", handler)
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if err != nil {
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return
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}
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m, err := backend.ListManifests(deploymentName)
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if err != nil {
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util.LogAndReturnError(handler, http.StatusInternalServerError, err, w)
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return
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}
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var manifestNames []string
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for _, manifest := range m {
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manifestNames = append(manifestNames, manifest.Name)
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}
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util.LogHandlerExitWithJSON(handler, w, manifestNames, http.StatusOK)
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}
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func getManifestHandlerFunc(w http.ResponseWriter, r *http.Request) {
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handler := "manager: get manifest"
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util.LogHandlerEntry(handler, r)
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deploymentName, err := getPathVariable(w, r, "deployment", handler)
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if err != nil {
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return
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}
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manifestName, err := getPathVariable(w, r, "manifest", handler)
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if err != nil {
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return
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}
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m, err := backend.GetManifest(deploymentName, manifestName)
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if err != nil {
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util.LogAndReturnError(handler, http.StatusBadRequest, err, w)
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return
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}
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util.LogHandlerExitWithJSON(handler, w, m, http.StatusOK)
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}
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func expandHandlerFunc(w http.ResponseWriter, r *http.Request) {
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handler := "manager: expand config"
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util.LogHandlerEntry(handler, r)
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defer r.Body.Close()
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t := getTemplate(w, r, handler)
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if t != nil {
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c, err := backend.Expand(t)
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if err != nil {
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util.LogAndReturnError(handler, http.StatusBadRequest, err, w)
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return
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}
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util.LogHandlerExitWithJSON(handler, w, c, http.StatusCreated)
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return
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}
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}
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// Putting Type handlers here for now because deployments.go
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// currently owns its own Manager backend and doesn't like to share.
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func listTypesHandlerFunc(w http.ResponseWriter, r *http.Request) {
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handler := "manager: list types"
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util.LogHandlerEntry(handler, r)
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util.LogHandlerExitWithJSON(handler, w, backend.ListTypes(), http.StatusOK)
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}
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func listTypeInstancesHandlerFunc(w http.ResponseWriter, r *http.Request) {
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handler := "manager: list instances"
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util.LogHandlerEntry(handler, r)
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typeName, err := getPathVariable(w, r, "type", handler)
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if err != nil {
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return
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}
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util.LogHandlerExitWithJSON(handler, w, backend.ListInstances(typeName), http.StatusOK)
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}
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