Пример #1
0
// List the routes registered in my system
func getRoutes(rw http.ResponseWriter, req *http.Request) {
	routes, err := common.GetRoutes()
	if err != nil {
		writeError(rw, req, err, http.StatusInternalServerError)
		return
	}
	writeBody(rw, req, routes, http.StatusOK)
}
Пример #2
0
func (n None) Init() error {
	// load services
	services, err := common.GetServices()
	if err != nil {
		return err
	}
	// apply services
	err = common.SetServices(services)
	if err != nil {
		return err
	}

	// load routes
	routes, err := common.GetRoutes()
	if err != nil {
		return err
	}
	// apply routes
	err = common.SetRoutes(routes)
	if err != nil {
		return err
	}

	// load certs
	certs, err := common.GetCerts()
	if err != nil {
		return err
	}
	// apply certs
	err = common.SetCerts(certs)
	if err != nil {
		return err
	}

	// load vips
	vips, err := common.GetVips()
	if err != nil {
		return err
	}
	// apply vips
	err = common.SetVips(vips)
	if err != nil {
		return err
	}
	return nil
}
Пример #3
0
// DeleteRoute tells all members to remove the route from their database.
// rolls back on failure
func (r Redis) DeleteRoute(route core.Route) error {
	conn := pool.Get()
	defer conn.Close()

	oldRoutes, err := common.GetRoutes()
	// this should not return nil to ensure the route is gone from entire cluster
	if err != nil && !strings.Contains(err.Error(), "No Route Found") {
		return err
	}

	// publishJson to others
	err = r.publishJson(conn, "delete-route", route)
	if err != nil {
		// if i failed to publishJson, request should fail
		return err
	}

	actionHash := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("delete-route %s", route))))

	// ensure all members applied action
	err = r.waitForMembers(conn, actionHash)
	if err != nil {
		uActionHash := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("set-routes", oldRoutes))))
		// cleanup rollback cruft. clear actionHash ensures no mistakes on re-submit
		defer conn.Do("DEL", uActionHash, actionHash)
		// attempt rollback - no need to waitForMembers here
		uerr := r.publishJson(conn, "set-routes", oldRoutes)
		if uerr != nil {
			err = fmt.Errorf("%v - %v", err, uerr)
		}
		return err
	}

	if database.CentralStore {
		return database.DeleteRoute(route)
	}

	return nil
}
Пример #4
0
// SetRoutes tells all members to replace the routes in their database with a new set.
// rolls back on failure
func (r Redis) SetRoutes(routes []core.Route) error {
	conn := pool.Get()
	defer conn.Close()

	oldRoutes, err := common.GetRoutes()
	if err != nil {
		return err
	}

	// publishJson to others
	err = r.publishJson(conn, "set-routes", routes)
	if err != nil {
		// if i failed to publishJson, request should fail
		return err
	}

	actionHash := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("set-routes %s", routes))))

	// ensure all members applied action
	err = r.waitForMembers(conn, actionHash)
	if err != nil {
		uActionHash := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("set-routes %s", oldRoutes))))
		// cleanup rollback cruft. clear actionHash ensures no mistakes on re-submit
		defer conn.Do("DEL", uActionHash, actionHash)
		// attempt rollback - no need to waitForMembers here
		uerr := r.publishJson(conn, "set-routes", oldRoutes)
		if uerr != nil {
			err = fmt.Errorf("%v - %v", err, uerr)
		}
		return err
	}

	if database.CentralStore {
		return database.SetRoutes(routes)
	}

	return nil
}
Пример #5
0
func (n None) GetRoutes() ([]core.Route, error) {
	return common.GetRoutes()
}
Пример #6
0
// GetRoutes gets a list of routes from the database, or another cluster member.
func (r *Redis) GetRoutes() ([]core.Route, error) {
	if database.CentralStore {
		return database.GetRoutes()
	}

	conn := pool.Get()
	defer conn.Close()

	// get known members(other than me) to 'poll' for routes
	members, _ := redis.Strings(conn.Do("SMEMBERS", "members"))
	if len(members) == 0 {
		// should only happen on new cluster
		// assume i'm ok to be master so don't reset imported routes
		config.Log.Trace("[cluster] - Assuming OK to be master, using routes from my database...")
		return common.GetRoutes()
	}
	for i := range members {
		if members[i] == self {
			// if i'm in the list of members, new requests should have failed while `waitForMembers`ing
			config.Log.Trace("[cluster] - Assuming I was in sync, using routes from my database...")
			return common.GetRoutes()
		}
	}

	c, err := redis.DialURL(config.ClusterConnection, redis.DialConnectTimeout(15*time.Second), redis.DialPassword(config.ClusterToken))
	if err != nil {
		return nil, fmt.Errorf("Failed to reach redis for routes subscriber - %v", err)
	}
	defer c.Close()

	message := make(chan interface{})
	subconn := redis.PubSubConn{c}

	// subscribe to channel that routes will be published on
	if err := subconn.Subscribe("routes"); err != nil {
		return nil, fmt.Errorf("Failed to reach redis for routes subscriber - %v", err)
	}
	defer subconn.Close()

	// listen always
	go func() {
		for {
			message <- subconn.Receive()
		}
	}()

	// todo: maybe use ttl?
	// timeout is how long to wait for the listed members to come back online
	timeout := time.After(time.Duration(20) * time.Second)

	// loop attempts for timeout, allows last dead members to start back up
	for {
		select {
		case <-timeout:
			return nil, fmt.Errorf("Timed out waiting for routes from %v", strings.Join(members, ", "))
		default:
			// request routes from each member until successful
			for _, member := range members {
				// memberTimeout is how long to wait for a member to respond with list of routes
				memberTimeout := time.After(3 * time.Second)

				// ask a member for its routes
				config.Log.Trace("[cluster] - Attempting to request routes from %v...", member)
				_, err := conn.Do("PUBLISH", "portal", fmt.Sprintf("get-routes %s", member))
				if err != nil {
					return nil, err
				}

				// wait for member to respond
				for {
					select {
					case <-memberTimeout:
						config.Log.Debug("[cluster] - Timed out waiting for routes from %v", member)
						goto nextRouteMember
					case msg := <-message:
						switch v := msg.(type) {
						case redis.Message:
							config.Log.Trace("[cluster] - Received message on 'routes' channel")
							var routes []core.Route
							err = parseBody(v.Data, &routes)
							if err != nil {
								return nil, fmt.Errorf("Failed to marshal routes - %v", err.Error())
							}
							config.Log.Trace("[cluster] - Routes from cluster: %#v\n", routes)
							return routes, nil
						case error:
							return nil, fmt.Errorf("Subscriber failed to receive routes - %v", v.Error())
						}
					}
				}
			nextRouteMember:
			}
		}
	}
}
Пример #7
0
// subscribe listens on the portal channel and acts based on messages received
func (r Redis) subscribe() {
	config.Log.Info("[cluster] - Redis subscribing on %s...", config.ClusterConnection)

	// listen for published messages
	for {
		switch v := r.subconn.Receive().(type) {
		case redis.Message:
			switch pdata := strings.FieldsFunc(string(v.Data), keepSubstrings); pdata[0] {
			// SERVICES ///////////////////////////////////////////////////////////////////////////////////////////////
			case "get-services":
				if len(pdata) != 2 {
					config.Log.Error("[cluster] - member not passed in message")
					break
				}
				member := pdata[1]

				if member == self {
					svcs, err := common.GetServices()
					if err != nil {
						config.Log.Error("[cluster] - Failed to get services - %v", err.Error())
						break
					}
					services, err := json.Marshal(svcs)
					if err != nil {
						config.Log.Error("[cluster] - Failed to marshal services - %v", err.Error())
						break
					}
					config.Log.Debug("[cluster] - get-services requested, publishing my services")
					conn := pool.Get()
					conn.Do("PUBLISH", "services", fmt.Sprintf("%s", services))
					conn.Close()
				}
			case "set-services":
				if len(pdata) != 2 {
					config.Log.Error("[cluster] - services not passed in message")
					break
				}
				services, err := marshalSvcs([]byte(pdata[1]))
				if err != nil {
					config.Log.Error("[cluster] - Failed to marshal services - %v", err.Error())
					break
				}
				err = common.SetServices(*services)
				if err != nil {
					config.Log.Error("[cluster] - Failed to set services - %v", err.Error())
					break
				}
				actionHash := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("set-services %s", *services))))
				config.Log.Trace("[cluster] - set-services hash - %v", actionHash)
				conn := pool.Get()
				conn.Do("SADD", actionHash, self)
				conn.Close()
				config.Log.Debug("[cluster] - set-services successful")
			case "set-service":
				if len(pdata) != 2 {
					// shouldn't happen unless redis is not secure and someone manually `publishJson`es
					config.Log.Error("[cluster] - service not passed in message")
					break
				}
				svc, err := marshalSvc([]byte(pdata[1]))
				if err != nil {
					config.Log.Error("[cluster] - Failed to marshal service - %v", err.Error())
					break
				}
				err = common.SetService(svc)
				if err != nil {
					config.Log.Error("[cluster] - Failed to set service - %v", err.Error())
					break
				}
				actionHash := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("set-service %s", *svc))))
				config.Log.Trace("[cluster] - set-service hash - %v", actionHash)
				conn := pool.Get()
				conn.Do("SADD", actionHash, self)
				conn.Close()
				config.Log.Debug("[cluster] - set-service successful")
			case "delete-service":
				if len(pdata) != 2 {
					config.Log.Error("[cluster] - service id not passed in message")
					break
				}
				svcId := pdata[1]
				err := common.DeleteService(svcId)
				if err != nil {
					config.Log.Error("[cluster] - Failed to delete service - %v", err.Error())
					break
				}
				actionHash := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("delete-service %s", svcId))))
				config.Log.Trace("[cluster] - delete-service hash - %v", actionHash)
				conn := pool.Get()
				conn.Do("SADD", actionHash, self)
				conn.Close()
				config.Log.Debug("[cluster] - delete-service successful")
			// SERVERS ///////////////////////////////////////////////////////////////////////////////////////////////
			case "set-servers":
				if len(pdata) != 3 {
					config.Log.Error("[cluster] - service id not passed in message")
					break
				}
				svcId := pdata[2]
				servers, err := marshalSrvs([]byte(pdata[1]))
				if err != nil {
					config.Log.Error("[cluster] - Failed to marshal server - %v", err.Error())
					break
				}
				err = common.SetServers(svcId, *servers)
				if err != nil {
					config.Log.Error("[cluster] - Failed to set servers - %v", err.Error())
					break
				}
				actionHash := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("set-servers %s %s", *servers, svcId))))
				config.Log.Trace("[cluster] - set-servers hash - %v", actionHash)
				conn := pool.Get()
				conn.Do("SADD", actionHash, self)
				conn.Close()
				config.Log.Debug("[cluster] - set-servers successful")
			case "set-server":
				if len(pdata) != 3 {
					// shouldn't happen unless redis is not secure and someone manually publishJson
					config.Log.Error("[cluster] - service id not passed in message")
					break
				}
				svcId := pdata[2]
				server, err := marshalSrv([]byte(pdata[1]))
				if err != nil {
					config.Log.Error("[cluster] - Failed to marshal server - %v", err.Error())
					break
				}
				err = common.SetServer(svcId, server)
				if err != nil {
					config.Log.Error("[cluster] - Failed to set server - %v", err.Error())
					break
				}
				actionHash := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("set-server %s %s", *server, svcId))))
				config.Log.Trace("[cluster] - set-server hash - %v", actionHash)
				conn := pool.Get()
				conn.Do("SADD", actionHash, self)
				conn.Close()
				config.Log.Debug("[cluster] - set-server successful")
			case "delete-server":
				if len(pdata) != 3 {
					config.Log.Error("[cluster] - service id not passed in message")
					break
				}
				srvId := pdata[1]
				svcId := pdata[2]
				err := common.DeleteServer(svcId, srvId)
				if err != nil {
					config.Log.Error("[cluster] - Failed to delete server - %v", err.Error())
					break
				}
				actionHash := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("delete-server %s %s", srvId, svcId))))
				config.Log.Trace("[cluster] - delete-server hash - %v", actionHash)
				conn := pool.Get()
				conn.Do("SADD", actionHash, self)
				conn.Close()
				config.Log.Debug("[cluster] - delete-server successful")
			// ROUTES ///////////////////////////////////////////////////////////////////////////////////////////////
			case "get-routes":

				if len(pdata) != 2 {
					config.Log.Error("[cluster] - member not passed in message")
					break
				}
				member := pdata[1]

				if member == self {
					rts, err := common.GetRoutes()
					if err != nil {
						config.Log.Error("[cluster] - Failed to get routes - %v", err.Error())
						break
					}
					routes, err := json.Marshal(rts)
					if err != nil {
						config.Log.Error("[cluster] - Failed to marshal routes - %v", err.Error())
						break
					}
					config.Log.Debug("[cluster] - get-routes requested, publishing my routes")
					conn := pool.Get()
					conn.Do("PUBLISH", "routes", fmt.Sprintf("%s", routes))
					conn.Close()
				}
			case "set-routes":
				if len(pdata) != 2 {
					config.Log.Error("[cluster] - routes not passed in message")
					break
				}

				var routes []core.Route
				err := parseBody([]byte(pdata[1]), &routes)
				if err != nil {
					config.Log.Error("[cluster] - Failed to marshal routes - %v", err.Error())
					break
				}
				err = common.SetRoutes(routes)
				if err != nil {
					config.Log.Error("[cluster] - Failed to set routes - %v", err.Error())
					break
				}
				actionHash := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("set-routes %s", routes))))
				config.Log.Trace("[cluster] - set-routes hash - %v", actionHash)
				conn := pool.Get()
				conn.Do("SADD", actionHash, self)
				conn.Close()
				config.Log.Debug("[cluster] - set-routes successful")
			case "set-route":
				if len(pdata) != 2 {
					// shouldn't happen unless redis is not secure and someone manually `publishJson`es
					config.Log.Error("[cluster] - route not passed in message")
					break
				}
				var rte core.Route
				err := parseBody([]byte(pdata[1]), &rte)
				if err != nil {
					config.Log.Error("[cluster] - Failed to marshal route - %v", err.Error())
					break
				}
				err = common.SetRoute(rte)
				if err != nil {
					config.Log.Error("[cluster] - Failed to set route - %v", err.Error())
					break
				}
				actionHash := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("set-route %s", rte))))
				config.Log.Trace("[cluster] - set-route hash - %v", actionHash)
				conn := pool.Get()
				conn.Do("SADD", actionHash, self)
				conn.Close()
				config.Log.Debug("[cluster] - set-route successful")
			case "delete-route":
				if len(pdata) != 2 {
					config.Log.Error("[cluster] - route not passed in message")
					break
				}
				var rte core.Route
				err := parseBody([]byte(pdata[1]), &rte)
				if err != nil {
					config.Log.Error("[cluster] - Failed to marshal route - %v", err.Error())
					break
				}
				err = common.DeleteRoute(rte)
				if err != nil {
					config.Log.Error("[cluster] - Failed to delete route - %v", err.Error())
					break
				}
				actionHash := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("delete-route %s", rte))))
				config.Log.Trace("[cluster] - delete-route hash - %v", actionHash)
				conn := pool.Get()
				conn.Do("SADD", actionHash, self)
				conn.Close()
				config.Log.Debug("[cluster] - delete-route successful")
			// CERTS ///////////////////////////////////////////////////////////////////////////////////////////////
			case "get-certs":
				if len(pdata) != 2 {
					config.Log.Error("[cluster] - member not passed in message")
					break
				}

				member := pdata[1]

				if member == self {
					rts, err := common.GetCerts()
					if err != nil {
						config.Log.Error("[cluster] - Failed to get certs - %v", err.Error())
						break
					}
					certs, err := json.Marshal(rts)
					if err != nil {
						config.Log.Error("[cluster] - Failed to marshal certs - %v", err.Error())
						break
					}
					config.Log.Debug("[cluster] - get-certs requested, publishing my certs")
					conn := pool.Get()
					conn.Do("PUBLISH", "certs", fmt.Sprintf("%s", certs))
					conn.Close()
				}
			case "set-certs":
				if len(pdata) != 2 {
					config.Log.Error("[cluster] - certs not passed in message")
					break
				}
				var certs []core.CertBundle
				err := parseBody([]byte(pdata[1]), &certs)
				if err != nil {
					config.Log.Error("[cluster] - Failed to marshal certs - %v", err.Error())
					break
				}
				err = common.SetCerts(certs)
				if err != nil {
					config.Log.Error("[cluster] - Failed to set certs - %v", err.Error())
					break
				}
				actionHash := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("set-certs %s", certs))))
				config.Log.Trace("[cluster] - set-certs hash - %v", actionHash)
				conn := pool.Get()
				conn.Do("SADD", actionHash, self)
				conn.Close()
				config.Log.Debug("[cluster] - set-certs successful")
			case "set-cert":
				if len(pdata) != 2 {
					// shouldn't happen unless redis is not secure and someone manually `publishJson`es
					config.Log.Error("[cluster] - cert not passed in message")
					break
				}
				var crt core.CertBundle
				err := parseBody([]byte(pdata[1]), &crt)
				if err != nil {
					config.Log.Error("[cluster] - Failed to marshal cert - %v", err.Error())
					break
				}
				err = common.SetCert(crt)
				if err != nil {
					config.Log.Error("[cluster] - Failed to set cert - %v", err.Error())
					break
				}
				actionHash := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("set-cert %s", crt))))
				config.Log.Trace("[cluster] - set-cert hash - %v", actionHash)
				conn := pool.Get()
				conn.Do("SADD", actionHash, self)
				conn.Close()
				config.Log.Debug("[cluster] - set-cert successful")
			case "delete-cert":
				if len(pdata) != 2 {
					config.Log.Error("[cluster] - cert id not passed in message")
					break
				}
				var crt core.CertBundle
				err := parseBody([]byte(pdata[1]), &crt)
				if err != nil {
					config.Log.Error("[cluster] - Failed to marshal cert - %v", err.Error())
					break
				}
				err = common.DeleteCert(crt)
				if err != nil {
					config.Log.Error("[cluster] - Failed to delete cert - %v", err.Error())
					break
				}
				actionHash := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("delete-cert %s", crt))))
				config.Log.Trace("[cluster] - delete-cert hash - %v", actionHash)
				conn := pool.Get()
				conn.Do("SADD", actionHash, self)
				conn.Close()
				config.Log.Debug("[cluster] - delete-cert successful")
			default:
				config.Log.Error("[cluster] - Recieved unknown data on %v: %v", v.Channel, string(v.Data))
			}
		case error:
			config.Log.Error("[cluster] - Subscriber failed to receive - %v", v.Error())
			if strings.Contains(v.Error(), "closed network connection") {
				// clear balancer rules ("stop balancing if we are 'dead'")
				balance.SetServices(make([]core.Service, 0, 0))
				// exit so we don't get spammed with logs
				os.Exit(1)
			}
			continue
		}
	}
}