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console_server.go
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console_server.go
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package main
import (
"encoding/json"
"errors"
"fmt"
"io"
"log"
"net/http"
"os"
"path"
"strings"
"text/tabwriter"
"time"
"github.com/gorilla/mux"
"github.com/skupperproject/skupper/pkg/utils"
"github.com/skupperproject/skupper/pkg/utils/tlscfg"
"github.com/skupperproject/skupper/pkg/version"
"github.com/skupperproject/skupper/api/types"
"github.com/skupperproject/skupper/client"
"github.com/skupperproject/skupper/pkg/certs"
"github.com/skupperproject/skupper/pkg/data"
"github.com/skupperproject/skupper/pkg/event"
"github.com/skupperproject/skupper/pkg/qdr"
)
const (
HttpInternalServerError string = "HttpServerError"
HttpAuthFailure string = "HttpAuthenticationFailure"
SiteVersionConflict string = "SiteVersionConflict"
)
type ConsoleServer struct {
agentPool *qdr.AgentPool
tokens *TokenManager
links *LinkManager
services *ServiceManager
policies *PolicyManager
accessRevoker *AccessRevoker
}
func newConsoleServer(cli *client.VanClient, config *certs.TlsConfigRetriever, eventHandler event.EventHandlerInterface) *ConsoleServer {
pool := qdr.NewAgentPool("amqps://"+types.QualifiedServiceName(types.LocalTransportServiceName, cli.Namespace)+":5671", config)
return &ConsoleServer{
agentPool: pool,
tokens: newTokenManager(cli),
links: newLinkManager(cli, pool, eventHandler),
services: newServiceManager(cli, eventHandler),
policies: newPolicyManager(cli),
accessRevoker: newAccessRevoker(cli),
}
}
func authenticate(dir string, user string, password string) bool {
filename := path.Join(dir, user)
file, err := os.Open(filename)
if err != nil {
if errors.Is(err, os.ErrNotExist) {
event.Recordf(HttpAuthFailure, "Failed to authenticate %s, no such user exists", user)
} else {
event.Recordf(HttpAuthFailure, "Failed to authenticate %s: %s", user, err)
}
return false
}
defer file.Close()
bytes, err := io.ReadAll(file)
if err != nil {
event.Recordf(HttpAuthFailure, "Failed to authenticate %s: %s", user, err)
return false
}
return string(bytes) == password
}
func authenticated(h http.Handler) http.Handler {
dir := os.Getenv("METRICS_USERS")
if dir != "" {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
user, password, _ := r.BasicAuth()
if authenticate(dir, user, password) {
h.ServeHTTP(w, r)
} else {
w.Header().Set("WWW-Authenticate", "Basic realm=skupper")
http.Error(w, "Unauthorized", http.StatusUnauthorized)
}
})
} else {
return h
}
}
type VersionInfo struct {
ServiceControllerVersion string `json:"service_controller_version"`
RouterVersion string `json:"router_version"`
SiteVersion string `json:"site_version"`
}
func (server *ConsoleServer) httpInternalError(w http.ResponseWriter, err error) {
event.Record(HttpInternalServerError, err.Error())
http.Error(w, err.Error(), http.StatusInternalServerError)
}
func (server *ConsoleServer) version() http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
v := VersionInfo{
ServiceControllerVersion: version.Version,
}
agent, err := server.agentPool.Get()
if err != nil {
server.httpInternalError(w, fmt.Errorf("Could not get management agent : %s", err))
return
}
router, err := agent.GetLocalRouter()
server.agentPool.Put(agent)
if err != nil {
server.httpInternalError(w, fmt.Errorf("Error retrieving local router version: %s", err))
return
}
v.RouterVersion = router.Version
v.SiteVersion = router.Site.Version
if wantsJsonOutput(r) {
bytes, err := json.MarshalIndent(v, "", " ")
if err != nil {
server.httpInternalError(w, fmt.Errorf("Error writing version: %s", err))
return
}
fmt.Fprintf(w, string(bytes)+"\n")
} else {
tw := tabwriter.NewWriter(w, 0, 4, 1, ' ', 0)
fmt.Fprintln(tw, "site\t"+v.SiteVersion)
fmt.Fprintln(tw, "service-controller\t"+v.ServiceControllerVersion)
fmt.Fprintln(tw, "router\t"+v.RouterVersion)
tw.Flush()
}
})
}
func (server *ConsoleServer) site() http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintln(w, os.Getenv("SKUPPER_SITE_ID"))
})
}
const (
MaxFieldLength int = 60
)
func wrap(text string, width int) []string {
words := strings.Fields(text)
wrapped := []string{}
line := ""
for _, word := range words {
if len(word)+len(line)+1 > width {
wrapped = append(wrapped, line)
line = word
} else {
if line == "" {
line = word
} else {
line = line + " " + word
}
}
}
wrapped = append(wrapped, line)
return wrapped
}
func wantsJsonOutput(r *http.Request) bool {
options := r.URL.Query()
output := options.Get("output")
return output == "json"
}
func (server *ConsoleServer) serveEvents() http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
e := event.Query()
if wantsJsonOutput(r) {
bytes, err := json.MarshalIndent(e, "", " ")
if err != nil {
server.httpInternalError(w, fmt.Errorf("Error writing events: %s", err))
return
}
fmt.Fprintf(w, string(bytes)+"\n")
} else {
tw := tabwriter.NewWriter(w, 0, 4, 1, ' ', 0)
fmt.Fprintln(tw, fmt.Sprintf("%s\t%s\t%s\t%s", "NAME", "COUNT", " ", "AGE"))
for _, group := range e {
fmt.Fprintln(tw, fmt.Sprintf("%s\t%d\t%s\t%s", group.Name, group.Total, " ", time.Since(group.LastOccurrence).Round(time.Second)))
for _, detail := range group.Counts {
if len(detail.Key) > MaxFieldLength {
lines := wrap(detail.Key, MaxFieldLength)
for i, line := range lines {
if i == 0 {
fmt.Fprintln(tw, fmt.Sprintf("%s\t%d\t%s\t%s", " ", detail.Count, line, time.Since(detail.LastOccurrence).Round(time.Second)))
} else {
fmt.Fprintln(tw, fmt.Sprintf("%s\t%s\t%s\t%s", " ", " ", line, ""))
}
}
} else {
fmt.Fprintln(tw, fmt.Sprintf("%s\t%d\t%s\t%s", " ", detail.Count, detail.Key, time.Since(detail.LastOccurrence).Round(time.Second)))
}
}
}
tw.Flush()
}
})
}
func (server *ConsoleServer) serveSites(jsonByDefault bool) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
d := server.getData(w)
if d != nil {
if jsonByDefault || wantsJsonOutput(r) {
bytes, err := json.MarshalIndent(d.Sites, "", " ")
if err != nil {
server.httpInternalError(w, fmt.Errorf("Error writing json: %s", err))
} else {
fmt.Fprintf(w, string(bytes)+"\n")
}
} else {
tw := tabwriter.NewWriter(w, 0, 4, 1, ' ', 0)
fmt.Fprintln(tw, fmt.Sprintf("%s\t%s\t%s\t%s\t%s\t%s\t%s", "ID", "NAME", "EDGE", "VERSION", "NAMESPACE", "URL", "CONNECTED TO"))
for _, site := range d.Sites {
siteVersion := site.Version
if err := server.links.cli.VerifySiteCompatibility(site.Version); err != nil {
siteVersion += fmt.Sprintf(" (incompatible - %v)", err)
}
fmt.Fprintln(tw, fmt.Sprintf("%s\t%s\t%t\t%s\t%s\t%s\t%s", site.SiteId, site.SiteName, site.Edge, siteVersion, site.Namespace, site.Url, strings.Join(site.Connected, " ")))
}
tw.Flush()
}
}
})
}
func (server *ConsoleServer) serveServices() http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
d := server.getData(w)
if d != nil {
if wantsJsonOutput(r) {
bytes, err := json.MarshalIndent(d.Services, "", " ")
if err != nil {
server.httpInternalError(w, fmt.Errorf("Error writing json: %s", err))
} else {
fmt.Fprintf(w, string(bytes)+"\n")
}
} else {
tw := tabwriter.NewWriter(w, 0, 4, 1, ' ', 0)
fmt.Fprintln(tw, fmt.Sprintf("%s\t%s\t%s\t%s", "ADDRESS", "PROTOCOL", "TARGET", "SITE"))
for _, s := range d.Services {
var service *data.Service
if hs, ok := s.(data.HttpService); ok {
service = &hs.Service
}
if ts, ok := s.(data.TcpService); ok {
service = &ts.Service
}
if service != nil {
fmt.Fprintln(tw, fmt.Sprintf("%s\t%s\t%s\t%s", service.Address, service.Protocol, "", ""))
for _, target := range service.Targets {
fmt.Fprintln(tw, fmt.Sprintf("%s\t%s\t%s\t%s", "", "", target.Name, target.SiteId))
}
}
}
tw.Flush()
}
}
})
}
func removeEmpty(input []string) []string {
output := []string{}
for _, s := range input {
if s != "" {
output = append(output, s)
}
}
return output
}
func (server *ConsoleServer) checkService() http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
agent, err := server.agentPool.Get()
if err != nil {
server.httpInternalError(w, fmt.Errorf("Could not get management agent : %s", err))
} else {
// what is the name of the service to check?
vars := mux.Vars(r)
if address, ok := vars["name"]; ok {
data, err := checkService(agent, address)
server.agentPool.Put(agent)
if err != nil {
server.httpInternalError(w, err)
} else {
if wantsJsonOutput(r) {
bytes, err := json.MarshalIndent(data, "", " ")
if err != nil {
server.httpInternalError(w, fmt.Errorf("Error writing json: %s", err))
} else {
fmt.Fprintf(w, string(bytes)+"\n")
}
} else {
if len(data.Observations) > 0 {
for _, observation := range data.Observations {
fmt.Fprintln(w, observation)
}
if data.HasDetailObservations() {
fmt.Fprintln(w, "")
fmt.Fprintln(w, "Details:")
fmt.Fprintln(w, "")
tw := tabwriter.NewWriter(w, 0, 4, 1, ' ', 0)
for _, site := range data.Details {
for i, observation := range site.Observations {
if i == 0 {
fmt.Fprintln(tw, fmt.Sprintf("%s\t%s", site.SiteId, observation))
} else {
fmt.Fprintln(tw, fmt.Sprintf("%s\t%s", "", observation))
}
}
}
tw.Flush()
}
} else {
fmt.Fprintln(w, "No issues found")
}
}
}
} else {
http.Error(w, "Invalid path", http.StatusNotFound)
}
}
})
}
func (server *ConsoleServer) getData(w http.ResponseWriter) *data.ConsoleData {
agent, err := server.agentPool.Get()
if err != nil {
server.httpInternalError(w, fmt.Errorf("Could not get management agent : %s", err))
return nil
}
data, err := getConsoleData(agent)
server.agentPool.Put(agent)
if err != nil {
server.httpInternalError(w, err)
return nil
}
return data
}
func (server *ConsoleServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
data := server.getData(w)
if data != nil {
bytes, err := json.MarshalIndent(data, "", " ")
if err != nil {
server.httpInternalError(w, fmt.Errorf("Error writing json: %s", err))
} else {
fmt.Fprintf(w, string(bytes)+"\n")
}
}
}
func (server *ConsoleServer) writeJson(obj interface{}, w http.ResponseWriter) {
bytes, err := json.MarshalIndent(obj, "", " ")
if err != nil {
server.httpInternalError(w, fmt.Errorf("Error writing json: %s", err))
} else {
fmt.Fprintf(w, string(bytes)+"\n")
}
}
func (server *ConsoleServer) start(stopCh <-chan struct{}) error {
go server.listen()
go server.listenLocal()
go server.listenHealthz()
return nil
}
func cors(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
origin := r.Header.Get("Origin")
if origin == "" {
origin = "*"
}
w.Header().Set("Access-Control-Allow-Origin", origin)
w.Header().Set("Access-Control-Allow-Methods", "GET,POST,DELETE")
next.ServeHTTP(w, r)
})
}
func (server *ConsoleServer) listen() {
addr := ":8080"
if os.Getenv("METRICS_PORT") != "" {
addr = ":" + os.Getenv("METRICS_PORT")
}
if os.Getenv("METRICS_HOST") != "" {
addr = os.Getenv("METRICS_HOST") + addr
}
log.Printf("Console server listening on %s", addr)
r := mux.NewRouter()
r.Handle("/DATA", authenticated(server))
r.Handle("/tokens", authenticated(serveTokens(server.tokens)))
r.Handle("/tokens/", authenticated(serveTokens(server.tokens)))
r.Handle("/tokens/{name}", authenticated(serveTokens(server.tokens)))
r.Handle("/downloadclaim/{name}", authenticated(downloadClaim(server.tokens)))
r.Handle("/links", authenticated(serveLinks(server.links)))
r.Handle("/links/", authenticated(serveLinks(server.links)))
r.Handle("/links/{name}", authenticated(serveLinks(server.links)))
r.Handle("/revokeaccess", authenticated(serveAccessRevoker(server.accessRevoker)))
r.Handle("/services", authenticated(serveServices(server.services)))
r.Handle("/services/", authenticated(serveServices(server.services)))
r.Handle("/services/{name}", authenticated(serveServices(server.services)))
r.Handle("/targets", authenticated(serveTargets(server.services)))
r.Handle("/targets/", authenticated(serveTargets(server.services)))
r.Handle("/version", authenticated(server.version()))
r.Handle("/site", authenticated(server.site()))
r.Handle("/sites", authenticated(server.serveSites(true)))
r.Handle("/events", authenticated(server.serveEvents()))
r.Handle("/policy/expose/{resourceType}/{resourceName}", authenticated(server.policies.expose()))
r.Handle("/policy/service/{name}", authenticated(server.policies.service()))
r.Handle("/policy/incominglink", authenticated(server.policies.incomingLink()))
r.Handle("/policy/outgoinglink/{hostname}", authenticated(server.policies.outgoingLink()))
r.Handle("/policy/list", authenticated(server.policies.dump()))
r.Handle("/servicecheck/{name}", authenticated(server.checkService()))
if os.Getenv("USE_CORS") != "" {
r.Use(cors)
}
srv := &http.Server{
Addr: addr,
Handler: r,
ReadTimeout: 60 * time.Second,
WriteTimeout: 60 * time.Second,
TLSConfig: tlscfg.Default(),
}
_, err := os.Stat("/etc/service-controller/console/tls.crt")
if err == nil {
log.Fatal(srv.ListenAndServeTLS("/etc/service-controller/console/tls.crt", "/etc/service-controller/console/tls.key"))
} else {
log.Fatal(srv.ListenAndServe())
}
}
func (server *ConsoleServer) listenLocal() {
addr := "localhost:8181"
r := mux.NewRouter()
r.Handle("/DATA", server)
r.Handle("/version", server.version())
r.Handle("/events", server.serveEvents())
r.Handle("/sites", server.serveSites(false))
r.Handle("/services", server.serveServices())
r.Handle("/servicecheck/{name}", server.checkService())
r.Handle("/policy/expose/{resourceType}/{resourceName}", server.policies.expose())
r.Handle("/policy/service/{name}", server.policies.service())
r.Handle("/policy/incominglink", server.policies.incomingLink())
r.Handle("/policy/outgoinglink/{hostname}", server.policies.outgoingLink())
r.Handle("/policy/list", server.policies.dump())
log.Fatal(http.ListenAndServe(addr, r))
}
func (server *ConsoleServer) listenHealthz() {
addr := ":8182"
r := mux.NewRouter()
r.Handle("/healthz", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(200)
w.Write([]byte("ok"))
}))
log.Fatal(http.ListenAndServe(addr, r))
}
func set(m map[string]map[string]bool, k1 string, k2 string) {
m2, ok := m[k1]
if !ok {
m2 = map[string]bool{}
}
m2[k2] = true
m[k1] = m2
}
func getAllSites(routers []qdr.Router) []data.SiteQueryData {
sites := map[string]data.SiteQueryData{}
routerToSite := map[string]string{}
siteConnections := map[string]map[string]bool{}
for _, r := range routers {
routerToSite[r.Id] = r.Site.Id
site, exists := sites[r.Site.Id]
if !exists {
if !r.IsGateway() {
sites[r.Site.Id] = data.SiteQueryData{
Site: data.Site{
SiteId: r.Site.Id,
Version: r.Site.Version,
Platform: r.Site.Platform,
Edge: r.Edge && strings.Contains(r.Id, "skupper-router"),
Connected: []string{},
Gateway: false,
},
}
}
} else if r.Site.Version != site.Version {
event.Recordf(SiteVersionConflict, "Conflicting site version for %s: %s != %s", site.SiteId, site.Version, r.Site.Version)
}
}
for _, r := range routers {
for _, id := range r.ConnectedTo {
set(siteConnections, r.Site.Id, routerToSite[id])
}
}
list := []data.SiteQueryData{}
for _, s := range sites {
m := siteConnections[s.SiteId]
for key, _ := range m {
if key != s.SiteId {
s.Connected = append(s.Connected, key)
}
}
list = append(list, s)
}
return list
}
func getConsoleData(agent *qdr.Agent) (*data.ConsoleData, error) {
routers, err := agent.GetAllRouters()
if err != nil {
return nil, fmt.Errorf("Error retrieving routers: %s", err)
}
sites := getAllSites(routers)
querySites(agent, sites)
for i, s := range sites {
if s.Version == "" {
// prior to 0.5 there was no version in router metadata
// and site query did not return services, so they are
// retrieved here separately
err = getServiceInfo(agent, routers, &sites[i], data.NewNullNameMapping())
if err != nil {
return nil, fmt.Errorf("Error retrieving service data from old site %s: %s", s.SiteId, err)
}
}
}
gateways := queryGateways(agent, sites)
sites = append(sites, gateways...)
consoleData := &data.ConsoleData{}
consoleData.Merge(sites)
return consoleData, nil
}
func checkService(agent *qdr.Agent, address string) (*data.ServiceCheck, error) {
// get all routers of version 0.5 and up
routers, err := agent.GetAllRouters()
if err != nil {
return nil, fmt.Errorf("Error retrieving routers: %s", err)
}
allSites := getAllSites(routers)
serviceCheck := data.ServiceCheck{}
sites := map[string]data.Site{}
for _, site := range allSites {
// Non kubernetes sites do not yet have a Service Controller,
// this request won't be sent to avoid an unnecessary timeout.
if utils.DefaultStr(site.Platform, string(types.PlatformKubernetes)) != string(types.PlatformKubernetes) {
continue
}
if site.Version != "" {
sites[site.SiteId] = site.Site
serviceCheck.Details = append(serviceCheck.Details, data.ServiceDetail{
SiteId: site.SiteId,
})
}
}
err = checkServiceForSites(agent, address, &serviceCheck)
if err != nil {
return nil, fmt.Errorf("Error retrieving service detail: %s", err)
}
return &serviceCheck, nil
}