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Add service alias support

Signed-off-by: Jana Radhakrishnan <mrjana@docker.com>
This commit is contained in:
Jana Radhakrishnan 2016-06-14 16:40:54 -07:00
parent 179f08a3f2
commit acac7ee812
6 changed files with 118 additions and 35 deletions

View file

@ -353,7 +353,7 @@ func (ep *endpoint) addToCluster() error {
ingressPorts = ep.ingressPorts
}
if err := c.addServiceBinding(ep.svcName, ep.svcID, n.ID(), ep.ID(), ep.virtualIP, ingressPorts, ep.Iface().Address().IP); err != nil {
if err := c.addServiceBinding(ep.svcName, ep.svcID, n.ID(), ep.ID(), ep.virtualIP, ingressPorts, ep.svcAliases, ep.Iface().Address().IP); err != nil {
return err
}
}
@ -364,6 +364,7 @@ func (ep *endpoint) addToCluster() error {
ServiceID: ep.svcID,
VirtualIP: ep.virtualIP.String(),
IngressPorts: ingressPorts,
Aliases: ep.svcAliases,
EndpointIP: ep.Iface().Address().IP.String(),
})
@ -399,7 +400,7 @@ func (ep *endpoint) deleteFromCluster() error {
ingressPorts = ep.ingressPorts
}
if err := c.rmServiceBinding(ep.svcName, ep.svcID, n.ID(), ep.ID(), ep.virtualIP, ingressPorts, ep.Iface().Address().IP); err != nil {
if err := c.rmServiceBinding(ep.svcName, ep.svcID, n.ID(), ep.ID(), ep.virtualIP, ingressPorts, ep.svcAliases, ep.Iface().Address().IP); err != nil {
return err
}
}
@ -554,6 +555,7 @@ func (c *controller) handleEpTableEvent(ev events.Event) {
vip := net.ParseIP(epRec.VirtualIP)
ip := net.ParseIP(epRec.EndpointIP)
ingressPorts := epRec.IngressPorts
aliases := epRec.Aliases
if name == "" || ip == nil {
logrus.Errorf("Invalid endpoint name/ip received while handling service table event %s", value)
@ -562,7 +564,7 @@ func (c *controller) handleEpTableEvent(ev events.Event) {
if isAdd {
if svcID != "" {
if err := c.addServiceBinding(svcName, svcID, nid, eid, vip, ingressPorts, ip); err != nil {
if err := c.addServiceBinding(svcName, svcID, nid, eid, vip, ingressPorts, aliases, ip); err != nil {
logrus.Errorf("Failed adding service binding for value %s: %v", value, err)
return
}
@ -571,7 +573,7 @@ func (c *controller) handleEpTableEvent(ev events.Event) {
n.addSvcRecords(name, ip, nil, true)
} else {
if svcID != "" {
if err := c.rmServiceBinding(svcName, svcID, nid, eid, vip, ingressPorts, ip); err != nil {
if err := c.rmServiceBinding(svcName, svcID, nid, eid, vip, ingressPorts, aliases, ip); err != nil {
logrus.Errorf("Failed adding service binding for value %s: %v", value, err)
return
}

View file

@ -72,6 +72,8 @@ type EndpointRecord struct {
EndpointIP string `protobuf:"bytes,5,opt,name=endpoint_ip,json=endpointIp,proto3" json:"endpoint_ip,omitempty"`
// IngressPorts exposed by the service to which this endpoint belongs.
IngressPorts []*PortConfig `protobuf:"bytes,6,rep,name=ingress_ports,json=ingressPorts" json:"ingress_ports,omitempty"`
// A list of aliases which are alternate names for the service
Aliases []string `protobuf:"bytes,7,rep,name=aliases" json:"aliases,omitempty"`
}
func (m *EndpointRecord) Reset() { *m = EndpointRecord{} }
@ -120,7 +122,7 @@ func (this *EndpointRecord) GoString() string {
if this == nil {
return "nil"
}
s := make([]string, 0, 10)
s := make([]string, 0, 11)
s = append(s, "&libnetwork.EndpointRecord{")
s = append(s, "Name: "+fmt.Sprintf("%#v", this.Name)+",\n")
s = append(s, "ServiceName: "+fmt.Sprintf("%#v", this.ServiceName)+",\n")
@ -130,6 +132,7 @@ func (this *EndpointRecord) GoString() string {
if this.IngressPorts != nil {
s = append(s, "IngressPorts: "+fmt.Sprintf("%#v", this.IngressPorts)+",\n")
}
s = append(s, "Aliases: "+fmt.Sprintf("%#v", this.Aliases)+",\n")
s = append(s, "}")
return strings.Join(s, "")
}
@ -228,6 +231,21 @@ func (m *EndpointRecord) MarshalTo(data []byte) (int, error) {
i += n
}
}
if len(m.Aliases) > 0 {
for _, s := range m.Aliases {
data[i] = 0x3a
i++
l = len(s)
for l >= 1<<7 {
data[i] = uint8(uint64(l)&0x7f | 0x80)
l >>= 7
i++
}
data[i] = uint8(l)
i++
i += copy(data[i:], s)
}
}
return i, nil
}
@ -326,6 +344,12 @@ func (m *EndpointRecord) Size() (n int) {
n += 1 + l + sovAgent(uint64(l))
}
}
if len(m.Aliases) > 0 {
for _, s := range m.Aliases {
l = len(s)
n += 1 + l + sovAgent(uint64(l))
}
}
return n
}
@ -372,6 +396,7 @@ func (this *EndpointRecord) String() string {
`VirtualIP:` + fmt.Sprintf("%v", this.VirtualIP) + `,`,
`EndpointIP:` + fmt.Sprintf("%v", this.EndpointIP) + `,`,
`IngressPorts:` + strings.Replace(fmt.Sprintf("%v", this.IngressPorts), "PortConfig", "PortConfig", 1) + `,`,
`Aliases:` + fmt.Sprintf("%v", this.Aliases) + `,`,
`}`,
}, "")
return s
@ -602,6 +627,35 @@ func (m *EndpointRecord) Unmarshal(data []byte) error {
return err
}
iNdEx = postIndex
case 7:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field Aliases", wireType)
}
var stringLen uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowAgent
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := data[iNdEx]
iNdEx++
stringLen |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
intStringLen := int(stringLen)
if intStringLen < 0 {
return ErrInvalidLengthAgent
}
postIndex := iNdEx + intStringLen
if postIndex > l {
return io.ErrUnexpectedEOF
}
m.Aliases = append(m.Aliases, string(data[iNdEx:postIndex]))
iNdEx = postIndex
default:
iNdEx = preIndex
skippy, err := skipAgent(data[iNdEx:])
@ -865,29 +919,30 @@ var (
)
var fileDescriptorAgent = []byte{
// 384 bytes of a gzipped FileDescriptorProto
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// 397 bytes of a gzipped FileDescriptorProto
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}

View file

@ -31,6 +31,9 @@ message EndpointRecord {
// IngressPorts exposed by the service to which this endpoint belongs.
repeated PortConfig ingress_ports = 6;
// A list of aliases which are alternate names for the service
repeated string aliases = 7;
}
// PortConfig specifies an exposed port which can be

View file

@ -70,6 +70,7 @@ type endpoint struct {
svcID string
svcName string
virtualIP net.IP
svcAliases []string
ingressPorts []*PortConfig
dbIndex uint64
dbExists bool
@ -98,6 +99,7 @@ func (ep *endpoint) MarshalJSON() ([]byte, error) {
epMap["svcID"] = ep.svcID
epMap["virtualIP"] = ep.virtualIP.String()
epMap["ingressPorts"] = ep.ingressPorts
epMap["svcAliases"] = ep.svcAliases
return json.Marshal(epMap)
}
@ -198,6 +200,11 @@ func (ep *endpoint) UnmarshalJSON(b []byte) (err error) {
ep.virtualIP = net.ParseIP(vip.(string))
}
sal, _ := json.Marshal(epMap["svcAliases"])
var svcAliases []string
json.Unmarshal(sal, &svcAliases)
ep.svcAliases = svcAliases
pc, _ := json.Marshal(epMap["ingressPorts"])
var ingressPorts []*PortConfig
json.Unmarshal(pc, &ingressPorts)
@ -231,6 +238,9 @@ func (ep *endpoint) CopyTo(o datastore.KVObject) error {
dstEp.svcID = ep.svcID
dstEp.virtualIP = ep.virtualIP
dstEp.svcAliases = make([]string, len(ep.svcAliases))
copy(dstEp.svcAliases, ep.svcAliases)
dstEp.ingressPorts = make([]*PortConfig, len(ep.ingressPorts))
copy(dstEp.ingressPorts, ep.ingressPorts)
@ -935,12 +945,13 @@ func CreateOptionAlias(name string, alias string) EndpointOption {
}
// CreateOptionService function returns an option setter for setting service binding configuration
func CreateOptionService(name, id string, vip net.IP, ingressPorts []*PortConfig) EndpointOption {
func CreateOptionService(name, id string, vip net.IP, ingressPorts []*PortConfig, aliases []string) EndpointOption {
return func(ep *endpoint) {
ep.svcName = name
ep.svcID = id
ep.virtualIP = vip
ep.ingressPorts = ingressPorts
ep.svcAliases = aliases
}
}

View file

@ -37,7 +37,7 @@ func newService(name string, id string, ingressPorts []*PortConfig) *service {
}
}
func (c *controller) addServiceBinding(name, sid, nid, eid string, vip net.IP, ingressPorts []*PortConfig, ip net.IP) error {
func (c *controller) addServiceBinding(name, sid, nid, eid string, vip net.IP, ingressPorts []*PortConfig, aliases []string, ip net.IP) error {
var (
s *service
addService bool
@ -61,6 +61,9 @@ func (c *controller) addServiceBinding(name, sid, nid, eid string, vip net.IP, i
// Add endpoint IP to special "tasks.svc_name" so that the
// applications have access to DNS RR.
n.(*network).addSvcRecords("tasks."+name, ip, nil, false)
for _, alias := range aliases {
n.(*network).addSvcRecords("tasks."+alias, ip, nil, false)
}
// Add service name to vip in DNS, if vip is valid. Otherwise resort to DNS RR
svcIP := vip
@ -68,6 +71,9 @@ func (c *controller) addServiceBinding(name, sid, nid, eid string, vip net.IP, i
svcIP = ip
}
n.(*network).addSvcRecords(name, svcIP, nil, false)
for _, alias := range aliases {
n.(*network).addSvcRecords(alias, svcIP, nil, false)
}
s.Lock()
defer s.Unlock()
@ -107,7 +113,7 @@ func (c *controller) addServiceBinding(name, sid, nid, eid string, vip net.IP, i
return nil
}
func (c *controller) rmServiceBinding(name, sid, nid, eid string, vip net.IP, ingressPorts []*PortConfig, ip net.IP) error {
func (c *controller) rmServiceBinding(name, sid, nid, eid string, vip net.IP, ingressPorts []*PortConfig, aliases []string, ip net.IP) error {
var rmService bool
n, err := c.NetworkByID(nid)
@ -125,6 +131,9 @@ func (c *controller) rmServiceBinding(name, sid, nid, eid string, vip net.IP, in
// Delete the special "tasks.svc_name" backend record.
n.(*network).deleteSvcRecords("tasks."+name, ip, nil, false)
for _, alias := range aliases {
n.(*network).deleteSvcRecords("tasks."+alias, ip, nil, false)
}
// Make sure to remove the right IP since if vip is
// not valid we would have added a DNS RR record.
@ -133,6 +142,9 @@ func (c *controller) rmServiceBinding(name, sid, nid, eid string, vip net.IP, in
svcIP = ip
}
n.(*network).deleteSvcRecords(name, svcIP, nil, false)
for _, alias := range aliases {
n.(*network).deleteSvcRecords(alias, svcIP, nil, false)
}
s.Lock()
defer s.Unlock()

View file

@ -7,11 +7,11 @@ import (
"net"
)
func (c *controller) addServiceBinding(name, sid, nid, eid string, vip net.IP, ingressPorts []*PortConfig, ip net.IP) error {
func (c *controller) addServiceBinding(name, sid, nid, eid string, vip net.IP, ingressPorts []*PortConfig, aliases []string, ip net.IP) error {
return fmt.Errorf("not supported")
}
func (c *controller) rmServiceBinding(name, sid, nid, eid string, vip net.IP, ingressPorts []*PortConfig, ip net.IP) error {
func (c *controller) rmServiceBinding(name, sid, nid, eid string, vip net.IP, ingressPorts []*PortConfig, aliases []string, ip net.IP) error {
return fmt.Errorf("not supported")
}