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Gracefully remove LB endpoints from services 

This patch attempts to allow endpoints to complete servicing connections
while being removed from a service.  The change adds a flag to the
endpoint.deleteServiceInfoFromCluster() method to indicate whether this
removal should fully remove connectivity through the load balancer
to the endpoint or should just disable directing further connections to
the endpoint.  If the flag is 'false', then the load balancer assigns
a weight of 0 to the endpoint but does not remove it as a linux load
balancing destination.  It does remove the endpoint as a docker load
balancing endpoint but tracks it in a special map of "disabled-but-not-
destroyed" load balancing endpoints.  This allows traffic to continue
flowing, at least under Linux.  If the flag is 'true', then the code
removes the endpoint entirely as a load balancing destination.

The sandbox.DisableService() method invokes deleteServiceInfoFromCluster()
with the flag sent to 'false', while the endpoint.sbLeave() method invokes
it with the flag set to 'true' to complete the removal on endpoint
finalization.  Renaming the endpoint invokes deleteServiceInfoFromCluster()
with the flag set to 'true' because renaming attempts to completely
remove and then re-add each endpoint service entry.

The controller.rmServiceBinding() method, which carries out the operation,
similarly gets a new flag for whether to fully remove the endpoint.  If
the flag is false, it does the job of moving the endpoint from the
load balancing set to the 'disabled' set.  It then removes or
de-weights the entry in the OS load balancing table via
network.rmLBBackend().  It removes the service entirely via said method
ONLY IF there are no more live or disabled load balancing endpoints.
Similarly network.addLBBackend() requires slight tweaking to properly
manage the disabled set.

Finally, this change requires propagating the status of disabled
service endpoints via the networkDB.  Accordingly, the patch includes
both code to generate and handle service update messages.  It also
augments the service structure with a ServiceDisabled boolean to convey
whether an endpoint should ultimately be removed or just disabled.
This, naturally, required a rebuild of the protocol buffer code as well.

Signed-off-by: Chris Telfer <ctelfer@docker.com>
This commit is contained in:
Chris Telfer 2018-02-14 17:04:23 -05:00
parent 3d6425dedf
commit 7d7412f957
9 changed files with 231 additions and 106 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

96
libnetwork/agent.go
View File

@ -638,14 +638,15 @@ func (ep *endpoint) addServiceInfoToCluster(sb *sandbox) error {
}
buf, err := proto.Marshal(&EndpointRecord{
Name: name,
ServiceName: ep.svcName,
ServiceID: ep.svcID,
VirtualIP: ep.virtualIP.String(),
IngressPorts: ingressPorts,
Aliases: ep.svcAliases,
TaskAliases: ep.myAliases,
EndpointIP: ep.Iface().Address().IP.String(),
Name: name,
ServiceName: ep.svcName,
ServiceID: ep.svcID,
VirtualIP: ep.virtualIP.String(),
IngressPorts: ingressPorts,
Aliases: ep.svcAliases,
TaskAliases: ep.myAliases,
EndpointIP: ep.Iface().Address().IP.String(),
ServiceDisabled: false,
})
if err != nil {
return err
@ -663,7 +664,7 @@ func (ep *endpoint) addServiceInfoToCluster(sb *sandbox) error {
return nil
}
func (ep *endpoint) deleteServiceInfoFromCluster(sb *sandbox, method string) error {
func (ep *endpoint) deleteServiceInfoFromCluster(sb *sandbox, fullRemove bool, method string) error {
if ep.isAnonymous() && len(ep.myAliases) == 0 {
return nil
}
@ -677,6 +678,15 @@ func (ep *endpoint) deleteServiceInfoFromCluster(sb *sandbox, method string) err
defer sb.Service.Unlock()
logrus.Debugf("deleteServiceInfoFromCluster from %s START for %s %s", method, ep.svcName, ep.ID())
// Avoid a race w/ with a container that aborts preemptively. This would
// get caught in disableServceInNetworkDB, but we check here to make the
// nature of the condition more clear.
// See comment in addServiceInfoToCluster()
if e := sb.getEndpoint(ep.ID()); e == nil {
logrus.Warnf("deleteServiceInfoFromCluster suppressing service resolution ep is not anymore in the sandbox %s", ep.ID())
return nil
}
c := n.getController()
agent := c.getAgent()
@ -686,9 +696,13 @@ func (ep *endpoint) deleteServiceInfoFromCluster(sb *sandbox, method string) err
}
if agent != nil {
// First delete from networkDB then locally
if err := agent.networkDB.DeleteEntry(libnetworkEPTable, n.ID(), ep.ID()); err != nil {
logrus.Warnf("deleteServiceInfoFromCluster NetworkDB DeleteEntry failed for %s %s err:%s", ep.id, n.id, err)
// First update the networkDB then locally
if fullRemove {
if err := agent.networkDB.DeleteEntry(libnetworkEPTable, n.ID(), ep.ID()); err != nil {
logrus.Warnf("deleteServiceInfoFromCluster NetworkDB DeleteEntry failed for %s %s err:%s", ep.id, n.id, err)
}
} else {
disableServiceInNetworkDB(agent, n, ep)
}
}
@ -699,7 +713,7 @@ func (ep *endpoint) deleteServiceInfoFromCluster(sb *sandbox, method string) err
if n.ingress {
ingressPorts = ep.ingressPorts
}
if err := c.rmServiceBinding(ep.svcName, ep.svcID, n.ID(), ep.ID(), name, ep.virtualIP, ingressPorts, ep.svcAliases, ep.myAliases, ep.Iface().Address().IP, "deleteServiceInfoFromCluster", true); err != nil {
if err := c.rmServiceBinding(ep.svcName, ep.svcID, n.ID(), ep.ID(), name, ep.virtualIP, ingressPorts, ep.svcAliases, ep.myAliases, ep.Iface().Address().IP, "deleteServiceInfoFromCluster", true, fullRemove); err != nil {
return err
}
} else {
@ -715,6 +729,35 @@ func (ep *endpoint) deleteServiceInfoFromCluster(sb *sandbox, method string) err
return nil
}
func disableServiceInNetworkDB(a *agent, n *network, ep *endpoint) {
var epRec EndpointRecord
logrus.Debugf("disableServiceInNetworkDB for %s %s", ep.svcName, ep.ID())
// Update existing record to indicate that the service is disabled
inBuf, err := a.networkDB.GetEntry(libnetworkEPTable, n.ID(), ep.ID())
if err != nil {
logrus.Warnf("disableServiceInNetworkDB GetEntry failed for %s %s err:%s", ep.id, n.id, err)
return
}
// Should never fail
if err := proto.Unmarshal(inBuf, &epRec); err != nil {
logrus.Errorf("disableServiceInNetworkDB unmarshal failed for %s %s err:%s", ep.id, n.id, err)
return
}
epRec.ServiceDisabled = true
// Should never fail
outBuf, err := proto.Marshal(&epRec)
if err != nil {
logrus.Errorf("disableServiceInNetworkDB marshalling failed for %s %s err:%s", ep.id, n.id, err)
return
}
// Send update to the whole cluster
if err := a.networkDB.UpdateEntry(libnetworkEPTable, n.ID(), ep.ID(), outBuf); err != nil {
logrus.Warnf("disableServiceInNetworkDB UpdateEntry failed for %s %s err:%s", ep.id, n.id, err)
}
}
func (n *network) addDriverWatches() {
if !n.isClusterEligible() {
return
@ -844,7 +887,6 @@ func (c *controller) handleEpTableEvent(ev events.Event) {
nid string
eid string
value []byte
isAdd bool
epRec EndpointRecord
)
@ -853,12 +895,15 @@ func (c *controller) handleEpTableEvent(ev events.Event) {
nid = event.NetworkID
eid = event.Key
value = event.Value
isAdd = true
case networkdb.DeleteEvent:
nid = event.NetworkID
eid = event.Key
value = event.Value
case networkdb.UpdateEvent:
nid = event.NetworkID
eid = event.Key
value = event.Value
default:
logrus.Errorf("Unexpected update service table event = %#v", event)
return
}
@ -883,7 +928,8 @@ func (c *controller) handleEpTableEvent(ev events.Event) {
return
}
if isAdd {
switch ev.(type) {
case networkdb.CreateEvent:
logrus.Debugf("handleEpTableEvent ADD %s R:%v", eid, epRec)
if svcID != "" {
// This is a remote task part of a service
@ -897,11 +943,12 @@ func (c *controller) handleEpTableEvent(ev events.Event) {
logrus.Errorf("failed adding container name resolution for %s epRec:%v err:%v", eid, epRec, err)
}
}
} else {
case networkdb.DeleteEvent:
logrus.Debugf("handleEpTableEvent DEL %s R:%v", eid, epRec)
if svcID != "" {
// This is a remote task part of a service
if err := c.rmServiceBinding(svcName, svcID, nid, eid, containerName, vip, ingressPorts, serviceAliases, taskAliases, ip, "handleEpTableEvent", true); err != nil {
if err := c.rmServiceBinding(svcName, svcID, nid, eid, containerName, vip, ingressPorts, serviceAliases, taskAliases, ip, "handleEpTableEvent", true, true); err != nil {
logrus.Errorf("failed removing service binding for %s epRec:%v err:%v", eid, epRec, err)
return
}
@ -911,5 +958,18 @@ func (c *controller) handleEpTableEvent(ev events.Event) {
logrus.Errorf("failed removing container name resolution for %s epRec:%v err:%v", eid, epRec, err)
}
}
case networkdb.UpdateEvent:
logrus.Debugf("handleEpTableEvent UPD %s R:%v", eid, epRec)
// We currently should only get these to inform us that an endpoint
// is disabled. Report if otherwise.
if svcID == "" || !epRec.ServiceDisabled {
logrus.Errorf("Unexpected update table event for %s epRec:%v", eid, epRec)
return
}
// This is a remote task that is part of a service that is now disabled
if err := c.rmServiceBinding(svcName, svcID, nid, eid, containerName, vip, ingressPorts, serviceAliases, taskAliases, ip, "handleEpTableEvent", true, false); err != nil {
logrus.Errorf("failed disabling service binding for %s epRec:%v err:%v", eid, epRec, err)
return
}
}
}

123
libnetwork/agent.pb.go
View File

@ -77,6 +77,8 @@ type EndpointRecord struct {
Aliases []string `protobuf:"bytes,7,rep,name=aliases" json:"aliases,omitempty"`
// List of aliases task specific aliases
TaskAliases []string `protobuf:"bytes,8,rep,name=task_aliases,json=taskAliases" json:"task_aliases,omitempty"`
// Whether this enpoint's service has been disabled
ServiceDisabled bool `protobuf:"varint,9,opt,name=service_disabled,json=serviceDisabled,proto3" json:"service_disabled,omitempty"`
}
func (m *EndpointRecord) Reset() { *m = EndpointRecord{} }
@ -139,6 +141,13 @@ func (m *EndpointRecord) GetTaskAliases() []string {
return nil
}
func (m *EndpointRecord) GetServiceDisabled() bool {
if m != nil {
return m.ServiceDisabled
}
return false
}
// PortConfig specifies an exposed port which can be
// addressed using the given name. This can be later queried
// using a service discovery api or a DNS SRV query. The node
@ -202,7 +211,7 @@ func (this *EndpointRecord) GoString() string {
if this == nil {
return "nil"
}
s := make([]string, 0, 12)
s := make([]string, 0, 13)
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")
@ -214,6 +223,7 @@ func (this *EndpointRecord) GoString() string {
}
s = append(s, "Aliases: "+fmt.Sprintf("%#v", this.Aliases)+",\n")
s = append(s, "TaskAliases: "+fmt.Sprintf("%#v", this.TaskAliases)+",\n")
s = append(s, "ServiceDisabled: "+fmt.Sprintf("%#v", this.ServiceDisabled)+",\n")
s = append(s, "}")
return strings.Join(s, "")
}
@ -325,6 +335,16 @@ func (m *EndpointRecord) MarshalTo(dAtA []byte) (int, error) {
i += copy(dAtA[i:], s)
}
}
if m.ServiceDisabled {
dAtA[i] = 0x48
i++
if m.ServiceDisabled {
dAtA[i] = 1
} else {
dAtA[i] = 0
}
i++
}
return i, nil
}
@ -367,24 +387,6 @@ func (m *PortConfig) MarshalTo(dAtA []byte) (int, error) {
return i, nil
}
func encodeFixed64Agent(dAtA []byte, offset int, v uint64) int {
dAtA[offset] = uint8(v)
dAtA[offset+1] = uint8(v >> 8)
dAtA[offset+2] = uint8(v >> 16)
dAtA[offset+3] = uint8(v >> 24)
dAtA[offset+4] = uint8(v >> 32)
dAtA[offset+5] = uint8(v >> 40)
dAtA[offset+6] = uint8(v >> 48)
dAtA[offset+7] = uint8(v >> 56)
return offset + 8
}
func encodeFixed32Agent(dAtA []byte, offset int, v uint32) int {
dAtA[offset] = uint8(v)
dAtA[offset+1] = uint8(v >> 8)
dAtA[offset+2] = uint8(v >> 16)
dAtA[offset+3] = uint8(v >> 24)
return offset + 4
}
func encodeVarintAgent(dAtA []byte, offset int, v uint64) int {
for v >= 1<<7 {
dAtA[offset] = uint8(v&0x7f | 0x80)
@ -435,6 +437,9 @@ func (m *EndpointRecord) Size() (n int) {
n += 1 + l + sovAgent(uint64(l))
}
}
if m.ServiceDisabled {
n += 2
}
return n
}
@ -483,6 +488,7 @@ func (this *EndpointRecord) String() string {
`IngressPorts:` + strings.Replace(fmt.Sprintf("%v", this.IngressPorts), "PortConfig", "PortConfig", 1) + `,`,
`Aliases:` + fmt.Sprintf("%v", this.Aliases) + `,`,
`TaskAliases:` + fmt.Sprintf("%v", this.TaskAliases) + `,`,
`ServiceDisabled:` + fmt.Sprintf("%v", this.ServiceDisabled) + `,`,
`}`,
}, "")
return s
@ -771,6 +777,26 @@ func (m *EndpointRecord) Unmarshal(dAtA []byte) error {
}
m.TaskAliases = append(m.TaskAliases, string(dAtA[iNdEx:postIndex]))
iNdEx = postIndex
case 9:
if wireType != 0 {
return fmt.Errorf("proto: wrong wireType = %d for field ServiceDisabled", wireType)
}
var v int
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowAgent
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
v |= (int(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
m.ServiceDisabled = bool(v != 0)
default:
iNdEx = preIndex
skippy, err := skipAgent(dAtA[iNdEx:])
@ -1036,33 +1062,34 @@ var (
func init() { proto.RegisterFile("agent.proto", fileDescriptorAgent) }
var fileDescriptorAgent = []byte{
// 437 bytes of a gzipped FileDescriptorProto
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0x86, 0xf6, 0xef, 0x28, 0x84, 0xc1, 0x7a, 0x99, 0x05, 0xbd, 0xe8, 0xe8, 0xe6, 0x36, 0xf1, 0x2d,
0x5e, 0x2f, 0x33, 0x95, 0x5c, 0xac, 0xb2, 0xc0, 0xf9, 0x37, 0xb9, 0x58, 0x65, 0x28, 0x02, 0xf7,
0x7c, 0xb9, 0xce, 0x82, 0x7e, 0x14, 0xdc, 0xdc, 0x26, 0x23, 0x1b, 0x29, 0x16, 0xb9, 0x5f, 0xbf,
0xc5, 0xbd, 0xb3, 0xf0, 0xe7, 0x7d, 0xdc, 0xfb, 0x7d, 0x1f, 0x3b, 0x9f, 0xdb, 0xd8, 0xf9, 0xde,
0xc6, 0xce, 0x8f, 0x36, 0x76, 0x7e, 0xb5, 0xb1, 0xb3, 0x3d, 0xd0, 0xaf, 0x79, 0xf9, 0x37, 0x00,
0x00, 0xff, 0xff, 0x55, 0x29, 0x75, 0x5c, 0xd7, 0x02, 0x00, 0x00,
}

3
libnetwork/agent.proto
View File

@ -37,6 +37,9 @@ message EndpointRecord {
// List of aliases task specific aliases
repeated string task_aliases = 8;
// Whether this enpoint's service has been disabled
bool service_disabled = 9;
}
// PortConfig specifies an exposed port which can be

14
libnetwork/endpoint.go
View File

@ -620,7 +620,7 @@ func (ep *endpoint) rename(name string) error {
}
if c.isAgent() {
if err = ep.deleteServiceInfoFromCluster(sb, "rename"); err != nil {
if err = ep.deleteServiceInfoFromCluster(sb, true, "rename"); err != nil {
return types.InternalErrorf("Could not delete service state for endpoint %s from cluster on rename: %v", ep.Name(), err)
}
} else {
@ -644,7 +644,7 @@ func (ep *endpoint) rename(name string) error {
}
defer func() {
if err != nil {
ep.deleteServiceInfoFromCluster(sb, "rename")
ep.deleteServiceInfoFromCluster(sb, true, "rename")
ep.name = oldName
ep.anonymous = oldAnonymous
ep.addServiceInfoToCluster(sb)
@ -755,8 +755,14 @@ func (ep *endpoint) sbLeave(sb *sandbox, force bool, options ...EndpointOption)
}
}
if ep.svcID != "" {
if err := ep.deleteServiceInfoFromCluster(sb, true, "sbLeave"); err != nil {
logrus.Warnf("Failed to clean up service info on container %s disconnect: %v", ep.name, err)
}
}
if err := sb.clearNetworkResources(ep); err != nil {
logrus.Warnf("Could not cleanup network resources on container %s disconnect: %v", ep.name, err)
logrus.Warnf("Failed to clean up network resources on container %s disconnect: %v", ep.name, err)
}
// Update the store about the sandbox detach only after we
@ -769,7 +775,7 @@ func (ep *endpoint) sbLeave(sb *sandbox, force bool, options ...EndpointOption)
}
if e := ep.deleteDriverInfoFromCluster(); e != nil {
logrus.Errorf("Could not delete endpoint state for endpoint %s from cluster: %v", ep.Name(), e)
logrus.Errorf("Failed to delete endpoint state for endpoint %s from cluster: %v", ep.Name(), e)
}
sb.deleteHostsEntries(n.getSvcRecords(ep))

2
libnetwork/sandbox.go
View File

@ -703,7 +703,7 @@ func (sb *sandbox) DisableService() (err error) {
}()
for _, ep := range sb.getConnectedEndpoints() {
if ep.isServiceEnabled() {
if err := ep.deleteServiceInfoFromCluster(sb, "DisableService"); err != nil {
if err := ep.deleteServiceInfoFromCluster(sb, false, "DisableService"); err != nil {
failedEps = append(failedEps, ep.Name())
logrus.Warnf("failed update state for endpoint %s into cluster: %v", ep.Name(), err)
}

7
libnetwork/service.go
View File

@ -79,13 +79,18 @@ func (s *service) printIPToEndpoint(ip string) (string, bool) {
return s.ipToEndpoint.String(ip)
}
type lbBackend struct {
ip net.IP
disabled bool
}
type loadBalancer struct {
vip net.IP
fwMark uint32
// Map of backend IPs backing this loadbalancer on this
// network. It is keyed with endpoint ID.
backEnds map[string]net.IP
backEnds map[string]*lbBackend
// Back pointer to service to which the loadbalancer belongs.
service *service

50
libnetwork/service_common.go
View File

@ -198,23 +198,8 @@ func (c *controller) cleanupServiceBindings(cleanupNID string) {
if cleanupNID != "" && nid != cleanupNID {
continue
}
for eid, ip := range lb.backEnds {
epID := eid
epIP := ip
service := s
loadBalancer := lb
networkID := nid
cleanupFuncs = append(cleanupFuncs, func() {
// ContainerName and taskAliases are not available here, this is still fine because the Service discovery
// cleanup already happened before. The only thing that rmServiceBinding is still doing here a part from the Load
// Balancer bookeeping, is to keep consistent the mapping of endpoint to IP.
if err := c.rmServiceBinding(service.name, service.id, networkID, epID, "", loadBalancer.vip,
service.ingressPorts, service.aliases, []string{}, epIP, "cleanupServiceBindings", false); err != nil {
logrus.Errorf("Failed to remove service bindings for service %s network %s endpoint %s while cleanup: %v",
service.id, networkID, epID, err)
}
})
for eid, be := range lb.backEnds {
cleanupFuncs = append(cleanupFuncs, makeServiceCleanupFunc(c, s, nid, eid, lb.vip, be.ip))
}
}
s.Unlock()
@ -226,6 +211,17 @@ func (c *controller) cleanupServiceBindings(cleanupNID string) {
}
func makeServiceCleanupFunc(c *controller, s *service, nID, eID string, vip net.IP, ip net.IP) func() {
// ContainerName and taskAliases are not available here, this is still fine because the Service discovery
// cleanup already happened before. The only thing that rmServiceBinding is still doing here a part from the Load
// Balancer bookeeping, is to keep consistent the mapping of endpoint to IP.
return func() {
if err := c.rmServiceBinding(s.name, s.id, nID, eID, "", vip, s.ingressPorts, s.aliases, []string{}, ip, "cleanupServiceBindings", false, true); err != nil {
logrus.Errorf("Failed to remove service bindings for service %s network %s endpoint %s while cleanup: %v", s.id, nID, eID, err)
}
}
}
func (c *controller) addServiceBinding(svcName, svcID, nID, eID, containerName string, vip net.IP, ingressPorts []*PortConfig, serviceAliases, taskAliases []string, ip net.IP, method string) error {
var addService bool
@ -271,7 +267,7 @@ func (c *controller) addServiceBinding(svcName, svcID, nID, eID, containerName s
lb = &loadBalancer{
vip: vip,
fwMark: fwMarkCtr,
backEnds: make(map[string]net.IP),
backEnds: make(map[string]*lbBackend),
service: s,
}
@ -282,7 +278,7 @@ func (c *controller) addServiceBinding(svcName, svcID, nID, eID, containerName s
addService = true
}
lb.backEnds[eID] = ip
lb.backEnds[eID] = &lbBackend{ip, false}
ok, entries := s.assignIPToEndpoint(ip.String(), eID)
if !ok || entries > 1 {
@ -307,7 +303,7 @@ func (c *controller) addServiceBinding(svcName, svcID, nID, eID, containerName s
return nil
}
func (c *controller) rmServiceBinding(svcName, svcID, nID, eID, containerName string, vip net.IP, ingressPorts []*PortConfig, serviceAliases []string, taskAliases []string, ip net.IP, method string, deleteSvcRecords bool) error {
func (c *controller) rmServiceBinding(svcName, svcID, nID, eID, containerName string, vip net.IP, ingressPorts []*PortConfig, serviceAliases []string, taskAliases []string, ip net.IP, method string, deleteSvcRecords bool, fullRemove bool) error {
var rmService bool
@ -338,13 +334,19 @@ func (c *controller) rmServiceBinding(svcName, svcID, nID, eID, containerName st
return nil
}
_, ok = lb.backEnds[eID]
be, ok := lb.backEnds[eID]
if !ok {
logrus.Warnf("rmServiceBinding %s %s %s aborted lb.backEnds[eid] !ok", method, svcName, eID)
logrus.Warnf("rmServiceBinding %s %s %s aborted lb.backEnds[eid] && lb.disabled[eid] !ok", method, svcName, eID)
return nil
}
delete(lb.backEnds, eID)
if fullRemove {
// delete regardless
delete(lb.backEnds, eID)
} else {
be.disabled = true
}
if len(lb.backEnds) == 0 {
// All the backends for this service have been
// removed. Time to remove the load balancer and also
@ -367,7 +369,7 @@ func (c *controller) rmServiceBinding(svcName, svcID, nID, eID, containerName st
// Remove loadbalancer service(if needed) and backend in all
// sandboxes in the network only if the vip is valid.
if len(vip) != 0 && entries == 0 {
n.(*network).rmLBBackend(ip, vip, lb, ingressPorts, rmService)
n.(*network).rmLBBackend(ip, vip, lb, ingressPorts, rmService, fullRemove)
}
// Delete the name resolutions

23
libnetwork/service_linux.go
View File

@ -103,8 +103,10 @@ func (sb *sandbox) populateLoadbalancers(ep *endpoint) {
}
lb.service.Lock()
for _, ip := range lb.backEnds {
sb.addLBBackend(ip, lb.vip, lb.fwMark, lb.service.ingressPorts, eIP, gwIP, n.ingress)
for _, be := range lb.backEnds {
if !be.disabled {
sb.addLBBackend(be.ip, lb.vip, lb.fwMark, lb.service.ingressPorts, eIP, gwIP, n.ingress)
}
}
lb.service.Unlock()
}
@ -135,7 +137,7 @@ func (n *network) addLBBackend(ip, vip net.IP, lb *loadBalancer, ingressPorts []
// Remove loadbalancer backend from all sandboxes which has a
// connection to this network. If needed remove the service entry as
// well, as specified by the rmService bool.
func (n *network) rmLBBackend(ip, vip net.IP, lb *loadBalancer, ingressPorts []*PortConfig, rmService bool) {
func (n *network) rmLBBackend(ip, vip net.IP, lb *loadBalancer, ingressPorts []*PortConfig, rmService bool, fullRemove bool) {
n.WalkEndpoints(func(e Endpoint) bool {
ep := e.(*endpoint)
if sb, ok := ep.getSandbox(); ok {
@ -148,7 +150,7 @@ func (n *network) rmLBBackend(ip, vip net.IP, lb *loadBalancer, ingressPorts []*
gwIP = ep.Iface().Address().IP
}
sb.rmLBBackend(ip, vip, lb.fwMark, ingressPorts, ep.Iface().Address(), gwIP, rmService, n.ingress)
sb.rmLBBackend(ip, vip, lb.fwMark, ingressPorts, ep.Iface().Address(), gwIP, rmService, fullRemove, n.ingress)
}
return false
@ -215,7 +217,7 @@ func (sb *sandbox) addLBBackend(ip, vip net.IP, fwMark uint32, ingressPorts []*P
}
// Remove loadbalancer backend from one connected sandbox.
func (sb *sandbox) rmLBBackend(ip, vip net.IP, fwMark uint32, ingressPorts []*PortConfig, eIP *net.IPNet, gwIP net.IP, rmService bool, isIngressNetwork bool) {
func (sb *sandbox) rmLBBackend(ip, vip net.IP, fwMark uint32, ingressPorts []*PortConfig, eIP *net.IPNet, gwIP net.IP, rmService bool, fullRemove bool, isIngressNetwork bool) {
if sb.osSbox == nil {
return
}
@ -242,8 +244,15 @@ func (sb *sandbox) rmLBBackend(ip, vip net.IP, fwMark uint32, ingressPorts []*Po
Weight: 1,
}
if err := i.DelDestination(s, d); err != nil && err != syscall.ENOENT {
logrus.Errorf("Failed to delete real server %s for vip %s fwmark %d in sbox %s (%s): %v", ip, vip, fwMark, sb.ID()[0:7], sb.ContainerID()[0:7], err)
if fullRemove {
if err := i.DelDestination(s, d); err != nil && err != syscall.ENOENT {
logrus.Errorf("Failed to delete real server %s for vip %s fwmark %d in sbox %s (%s): %v", ip, vip, fwMark, sb.ID()[0:7], sb.ContainerID()[0:7], err)
}
} else {
d.Weight = 0
if err := i.UpdateDestination(s, d); err != nil && err != syscall.ENOENT {
logrus.Errorf("Failed to set LB weight of real server %s to 0 for vip %s fwmark %d in sbox %s (%s): %v", ip, vip, fwMark, sb.ID()[0:7], sb.ContainerID()[0:7], err)
}
}
if rmService {

19
libnetwork/service_windows.go
View File

@ -44,7 +44,10 @@ func (n *network) addLBBackend(ip, vip net.IP, lb *loadBalancer, ingressPorts []
var endpoints []hcsshim.HNSEndpoint
for eid := range lb.backEnds {
for eid, be := range lb.backEnds {
if be.disabled {
continue
}
//Call HNS to get back ID (GUID) corresponding to the endpoint.
hnsEndpoint, err := hcsshim.GetHNSEndpointByName(eid)
if err != nil {
@ -114,9 +117,9 @@ func (n *network) addLBBackend(ip, vip net.IP, lb *loadBalancer, ingressPorts []
}
}
func (n *network) rmLBBackend(ip, vip net.IP, lb *loadBalancer, ingressPorts []*PortConfig, rmService bool) {
func (n *network) rmLBBackend(ip, vip net.IP, lb *loadBalancer, ingressPorts []*PortConfig, rmService bool, fullRemove bool) {
if system.GetOSVersion().Build > 16236 {
if len(lb.backEnds) > 0 {
if numEnabledBackends(lb) > 0 {
//Reprogram HNS (actually VFP) with the existing backends.
n.addLBBackend(ip, vip, lb, ingressPorts)
} else {
@ -143,6 +146,16 @@ func (n *network) rmLBBackend(ip, vip net.IP, lb *loadBalancer, ingressPorts []*
}
}
func numEnabledBackends(lb *loadBalancer) int {
nEnabled := 0
for _, be := range lb.backEnds {
if !be.disabled {
nEnabled++
}
}
return nEnabled
}
func (sb *sandbox) populateLoadbalancers(ep *endpoint) {
}