/
instance_handler.go
640 lines (539 loc) · 18 KB
/
instance_handler.go
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// Copyright 2016 IBM Corporation
//
// 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 eureka
import (
"encoding/json"
"fmt"
"net"
"net/http"
"net/url"
"strings"
"time"
log "github.com/Sirupsen/logrus"
"github.com/ant0ine/go-json-rest/rest"
"github.com/amalgam8/amalgam8/registry/server/env"
"github.com/amalgam8/amalgam8/registry/store"
"github.com/amalgam8/amalgam8/registry/utils/i18n"
)
func (routes *Routes) registerInstance(w rest.ResponseWriter, r *rest.Request) {
var err error
var reg InstanceWrapper
appid := r.PathParam(RouteParamAppID)
if appid == "" {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "application id is required",
}).Warn("Failed to register instance")
i18n.Error(r, w, http.StatusBadRequest, i18n.EurekaErrorApplicationIdentifierMissing)
return
}
if err = r.DecodeJsonPayload(®); err != nil {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": err,
}).Warn("Failed to register instance")
i18n.Error(r, w, http.StatusBadRequest, i18n.ErrorInstanceRegistrationFailed)
return
}
if reg.Inst == nil {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "instance is required",
}).Warn("Failed to register instance")
i18n.Error(r, w, http.StatusBadRequest, i18n.EurekaErrorRequiredFieldsMissing)
return
}
inst := reg.Inst
if inst.Application == "" {
inst.Application = appid
}
if inst.HostName == "" || inst.Application == "" || inst.VIPAddr == "" || inst.IPAddr == "" {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "hostname, application, vipaddress and IPaddress are required",
}).Warnf("Failed to register instance %+v", inst)
i18n.Error(r, w, http.StatusBadRequest, i18n.EurekaErrorRequiredFieldsMissing)
return
}
if appid != inst.Application {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "application name mismatch",
}).Warnf("Failed to register instance %+v", inst)
i18n.Error(r, w, http.StatusBadRequest, i18n.EurekaErrorApplicationMismatch)
return
}
si, err := Translate(inst)
if err != nil {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": err,
}).Errorf("Failed to register instance %+v", inst)
i18n.Error(r, w, http.StatusBadRequest, i18n.ErrorInstanceRegistrationFailed)
return
}
catalog := routes.catalog(w, r)
if catalog == nil {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "catalog is nil",
}).Errorf("Failed to register instance %+v", inst)
// error response set by routes.catalog()
return
}
var sir *store.ServiceInstance
if sir, err = catalog.Register(si); err != nil {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": err,
}).Warnf("Failed to register instance %+v", inst)
if regerr, ok := err.(*store.Error); ok {
switch regerr.Code {
case store.ErrorNoInstanceServiceName:
i18n.Error(r, w, http.StatusBadRequest, i18n.ErrorNoServiceName)
case store.ErrorInstanceServiceNameTooLong:
i18n.Error(r, w, http.StatusBadRequest, i18n.ErrorServiceNameTooLong, store.ServiceNameMaxLength)
case store.ErrorInstanceEndpointValueTooLong:
i18n.Error(r, w, http.StatusBadRequest, i18n.ErrorEndpointValueTooLong, store.EndpointValueMaxLength)
case store.ErrorInstanceStatusLengthTooLong:
i18n.Error(r, w, http.StatusBadRequest, i18n.ErrorStatusLengthTooLong, store.StatusMaxLength)
case store.ErrorInstanceMetaDataTooLong:
i18n.Error(r, w, http.StatusBadRequest, i18n.ErrorMetaDataTooLong, store.MetadataMaxLength)
default:
i18n.Error(r, w, http.StatusInternalServerError, i18n.ErrorInstanceRegistrationFailed)
}
} else {
i18n.Error(r, w, http.StatusInternalServerError, i18n.ErrorInstanceRegistrationFailed)
}
return
} else if sir == nil {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "instance is nil",
}).Warnf("Failed to register instance %+v", inst)
i18n.Error(r, w, http.StatusInternalServerError, i18n.ErrorNilObject)
return
} else if sir.ID == "" {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "instance id is empty",
}).Warnf("Failed to register instance %s", sir)
i18n.Error(r, w, http.StatusInternalServerError, i18n.ErrorInstanceIdentifierMissing)
return
}
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
}).Infof("Instance %s registered", sir)
r.Env[env.ServiceInstance] = sir
w.WriteHeader(http.StatusNoContent)
}
func extractTagsFromMetadata(jsonString json.RawMessage) ([]string, error) {
var md map[string]interface{}
if err := json.Unmarshal(jsonString, &md); err != nil {
return nil, err
}
var tags []string
if val, ok := md[metadataTags]; ok {
sval := strings.TrimSpace(fmt.Sprintf("%v", val))
if sval != "" {
sval = strings.Replace(sval, ";", ",", -1)
tags = strings.Split(sval, ",")
for i := range tags {
tags[i] = strings.TrimSpace(tags[i])
}
}
}
return tags, nil
}
func (routes *Routes) deregisterInstance(w rest.ResponseWriter, r *rest.Request) {
appid := r.PathParam(RouteParamAppID)
if appid == "" {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "application id is required",
}).Warn("Failed to deregister instance")
i18n.Error(r, w, http.StatusBadRequest, i18n.EurekaErrorApplicationIdentifierMissing)
return
}
iid := r.PathParam(RouteParamInstanceID)
if iid == "" {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "instance id is required",
}).Warn("Failed to deregister instance")
i18n.Error(r, w, http.StatusBadRequest, i18n.ErrorInstanceIdentifierMissing)
return
}
uid := buildUniqueInstanceID(appid, iid)
catalog := routes.catalog(w, r)
if catalog == nil {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "catalog is nil",
}).Errorf("Failed to deregister instance %s", uid)
// error response set by routes.catalog()
return
}
si, err := catalog.Deregister(uid)
if err != nil {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": err,
}).Warnf("Failed to deregister instance %s", uid)
i18n.Error(r, w, http.StatusGone, i18n.ErrorInstanceNotFound)
return
}
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
}).Infof("Instance id %s deregistered", uid)
r.Env[env.ServiceInstance] = si
w.WriteHeader(http.StatusOK)
}
func (routes *Routes) renewInstance(w rest.ResponseWriter, r *rest.Request) {
appid := r.PathParam(RouteParamAppID)
if appid == "" {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "application id is required",
}).Warn("Failed to renew instance")
i18n.Error(r, w, http.StatusBadRequest, i18n.EurekaErrorApplicationIdentifierMissing)
return
}
iid := r.PathParam(RouteParamInstanceID)
if iid == "" {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "instance id is required",
}).Warn("Failed to renew instance")
i18n.Error(r, w, http.StatusBadRequest, i18n.ErrorInstanceIdentifierMissing)
return
}
uid := buildUniqueInstanceID(appid, iid)
catalog := routes.catalog(w, r)
if catalog == nil {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "catalog is nil",
}).Errorf("Failed to renew instance %s", uid)
// error response set by routes.catalog()
return
}
si, err := catalog.Renew(uid)
if err != nil {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": err,
}).Warnf("Failed to renew instance %s", uid)
i18n.Error(r, w, http.StatusGone, i18n.ErrorInstanceNotFound)
return
}
r.Env[env.ServiceInstance] = si
w.WriteHeader(http.StatusOK)
}
func (routes *Routes) getInstanceByAppAndID(w rest.ResponseWriter, r *rest.Request) {
appid := r.PathParam(RouteParamAppID)
if appid == "" {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "application id is required",
}).Warn("Failed to query instance")
i18n.Error(r, w, http.StatusBadRequest, i18n.EurekaErrorApplicationIdentifierMissing)
return
}
iid := r.PathParam(RouteParamInstanceID)
if iid == "" {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "instance id is required",
}).Warn("Failed to query instance")
i18n.Error(r, w, http.StatusBadRequest, i18n.ErrorInstanceIdentifierMissing)
return
}
uid := buildUniqueInstanceID(appid, iid)
catalog := routes.catalog(w, r)
if catalog == nil {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "catalog is nil",
}).Errorf("Failed to query instance %s", uid)
// error response set by routes.catalog()
return
}
si, err := catalog.Instance(uid)
if err != nil {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": err,
}).Warnf("Failed to query instance %s", uid)
i18n.Error(r, w, http.StatusNotFound, i18n.ErrorInstanceNotFound)
return
}
r.Env[env.ServiceInstance] = si
inst := buildInstanceFromRegistry(si)
err = w.WriteJson(&InstanceWrapper{inst})
if err != nil {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": err,
}).Warnf("Failed to encode instance %s", uid)
i18n.Error(r, w, http.StatusInternalServerError, i18n.ErrorEncoding)
return
}
}
func (routes *Routes) getInstanceByID(w rest.ResponseWriter, r *rest.Request) {
iid := r.PathParam(RouteParamInstanceID)
if iid == "" {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "instance id is required",
}).Warn("Failed to query instance")
i18n.Error(r, w, http.StatusBadRequest, i18n.ErrorInstanceIdentifierMissing)
return
}
uid := buildUniqueInstanceID("", iid)
catalog := routes.catalog(w, r)
if catalog == nil {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "catalog is nil",
}).Errorf("Failed to query instance %s", uid)
// error response set by routes.catalog()
return
}
services := catalog.ListServices(nil)
if services == nil {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "services list is nil",
}).Warnf("Failed to query instance %s", uid)
i18n.Error(r, w, http.StatusNotFound, i18n.ErrorInstanceNotFound)
return
}
for _, svc := range services {
insts, err := catalog.List(svc.ServiceName, nil)
// The service might be removed by other user in the middle
if err != nil {
continue
}
for _, si := range insts {
if strings.HasSuffix(si.ID, uid) {
r.Env[env.ServiceInstance] = si
inst := buildInstanceFromRegistry(si)
err = w.WriteJson(&InstanceWrapper{inst})
if err != nil {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": err,
}).Warnf("Failed to encode instance %s", si.ID)
i18n.Error(r, w, http.StatusInternalServerError, i18n.ErrorEncoding)
}
return
}
}
}
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "no such instance",
}).Errorf("Failed to query instance %s", uid)
i18n.Error(r, w, http.StatusNotFound, i18n.ErrorInstanceNotFound)
}
func (routes *Routes) setStatus(w rest.ResponseWriter, r *rest.Request) {
appid := r.PathParam(RouteParamAppID)
if appid == "" {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "application id is required",
}).Warn("Failed to set instances status")
i18n.Error(r, w, http.StatusBadRequest, i18n.EurekaErrorApplicationIdentifierMissing)
return
}
iid := r.PathParam(RouteParamInstanceID)
if iid == "" {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "instance id is required",
}).Warn("Failed to set instances status")
i18n.Error(r, w, http.StatusBadRequest, i18n.ErrorInstanceIdentifierMissing)
return
}
uid := buildUniqueInstanceID(appid, iid)
status := r.URL.Query().Get("value")
if status == "" {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "status value is required",
}).Warn("Failed to set instances status")
i18n.Error(r, w, http.StatusBadRequest, i18n.EurekaErrorStatusMissing)
return
}
catalog := routes.catalog(w, r)
if catalog == nil {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "catalog is nil",
}).Errorf("Failed to set instance %s status", uid)
// error response set by routes.catalog()
return
}
si, err := catalog.Instance(uid)
if err != nil {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": err,
}).Warnf("Failed to set instance %s status", uid)
i18n.Error(r, w, http.StatusNotFound, i18n.ErrorInstanceNotFound)
return
}
if si.ServiceName != appid {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": "Application id does not match",
}).Warnf("Failed to set instance %s status. service_name: %s", uid, si.ServiceName)
i18n.Error(r, w, http.StatusBadRequest, i18n.ErrorInstanceNotFound)
return
}
si, err = catalog.SetStatus(uid, status)
if err != nil {
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
"error": err,
}).Warnf("Failed to set instance %s status", uid)
i18n.Error(r, w, http.StatusInternalServerError, i18n.ErrorInstanceNotFound)
return
}
routes.logger.WithFields(log.Fields{
"namespace": r.Env[env.Namespace],
}).Infof("Instance %s status was changed. old: %s, new: %s", uid, si.Status, status)
r.Env[env.ServiceInstance] = si
w.WriteHeader(http.StatusOK)
}
func buildUniqueInstanceID(appid, iid string) string {
return fmt.Sprintf("%s:%s", appid, iid)
}
func buildExtensionFromInstance(inst *Instance) (map[string]interface{}, error) {
copyInst := *inst
// Clear all fields that we want to override later
copyInst.Status = ""
copyInst.OvrStatus = ""
copyInst.ActionType = ""
copyInst.Metadata = nil
copyInst.LastUpdatedTs = nil
copyInst.LastDirtyTs = nil
copyInst.Lease = nil
ext, err := json.Marshal(copyInst)
if err != nil {
return nil, err
}
return map[string]interface{}{extEureka: string(ext), extVIP: copyInst.VIPAddr}, nil
}
// Translate translates eureka instance into store instance
func Translate(inst *Instance) (*store.ServiceInstance, error) {
var err error
// Get the instance ID
// In the old eureka client versions (1.1.x) the instance ID is NOT explicitly set in the request data,
// but it is part of the DatacenterInfo class.
id := inst.ID
if id == "" {
id, err = resolveInstanceID(inst)
if err != nil {
return nil, err
}
}
uid := buildUniqueInstanceID(inst.Application, id)
tags, err := extractTagsFromMetadata(inst.Metadata)
if err != nil {
return nil, err
}
ext, err := buildExtensionFromInstance(inst)
if err != nil {
return nil, err
}
ttl := defaultDurationInt
var lastRenewal time.Time
if inst.Lease != nil && inst.Lease.DurationInt > 0 {
ttl = inst.Lease.DurationInt
lastRenewal = time.Unix(inst.Lease.LastRenewalTs/1e3, (inst.Lease.LastRenewalTs%1e3)*1e6)
}
// Secure port is preferred over un-secure port.
endpoint := &store.Endpoint{Type: "tcp", Value: inst.HostName}
if inst.SecPort != nil && inst.SecPort.Enabled == "true" {
endpoint = &store.Endpoint{Type: "https", Value: fmt.Sprintf("%s:%v", inst.HostName, inst.SecPort.Value)}
} else if inst.Port != nil && inst.Port.Enabled == "true" {
endpoint = &store.Endpoint{Type: "tcp", Value: fmt.Sprintf("%s:%v", inst.HostName, inst.Port.Value)}
}
si := &store.ServiceInstance{
ID: uid,
ServiceName: inst.Application,
Endpoint: endpoint,
Status: inst.Status,
Tags: tags,
TTL: time.Duration(ttl) * time.Second,
LastRenewal: lastRenewal,
Metadata: inst.Metadata,
Extension: ext,
}
return si, nil
}
func buildInstanceFromRegistry(si *store.ServiceInstance) *Instance {
inst := buildDefaultInstance(si)
if si.Extension != nil {
if ext, ok := si.Extension[extEureka]; ok {
json.Unmarshal([]byte(ext.(string)), &inst)
}
}
return inst
}
func buildDefaultInstance(si *store.ServiceInstance) *Instance {
inst := &Instance{
Application: si.ServiceName,
VIPAddr: si.ServiceName,
GroupName: "UNKNOWN",
Status: si.Status,
Datacenter: &DatacenterInfo{
Class: "com.netflix.appinfo.InstanceInfo$DefaultDataCenterInfo",
Name: "MyOwn",
},
Lease: &LeaseInfo{
RegistrationTs: si.RegistrationTime.Unix(),
DurationInt: uint32(si.TTL / time.Second),
LastRenewalTs: si.LastRenewal.Unix(),
},
CountryID: 1,
CordServer: "false",
ActionType: "ADDED",
OvrStatus: "UNKNOWN",
LastDirtyTs: fmt.Sprintf("%d", si.RegistrationTime.UnixNano()/int64(time.Millisecond)),
LastUpdatedTs: fmt.Sprintf("%d", si.RegistrationTime.UnixNano()/int64(time.Millisecond)),
Metadata: si.Metadata,
}
if si.Endpoint != nil && len(si.Endpoint.Value) > 0 {
inst.HostName = si.Endpoint.Value
u, err := url.Parse(si.Endpoint.Value)
if err == nil {
host, port, _ := net.SplitHostPort(u.Host)
if port != "" {
if u.Scheme == "https" || si.Endpoint.Type == "https" {
inst.SecPort = &Port{Enabled: "true", Value: port}
} else {
inst.Port = &Port{Enabled: "true", Value: port}
}
}
if host != "" {
inst.HostName = host
}
}
inst.IPAddr = inst.HostName
}
return inst
}