/usr/share/gocode/src/github.com/docker/libnetwork/service_common.go is in golang-github-docker-libnetwork-dev 0.8.0-dev.2+git20170202.599.45b4086-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 | // +build linux windows
package libnetwork
import (
"net"
"github.com/Sirupsen/logrus"
)
func newService(name string, id string, ingressPorts []*PortConfig, aliases []string) *service {
return &service{
name: name,
id: id,
ingressPorts: ingressPorts,
loadBalancers: make(map[string]*loadBalancer),
aliases: aliases,
}
}
func (c *controller) cleanupServiceBindings(cleanupNID string) {
var cleanupFuncs []func()
c.Lock()
services := make([]*service, 0, len(c.serviceBindings))
for _, s := range c.serviceBindings {
services = append(services, s)
}
c.Unlock()
for _, s := range services {
s.Lock()
for nid, lb := range s.loadBalancers {
if cleanupNID != "" && nid != cleanupNID {
continue
}
for eid, ip := range lb.backEnds {
service := s
loadBalancer := lb
networkID := nid
epID := eid
epIP := ip
cleanupFuncs = append(cleanupFuncs, func() {
if err := c.rmServiceBinding(service.name, service.id, networkID, epID, loadBalancer.vip,
service.ingressPorts, service.aliases, epIP); err != nil {
logrus.Errorf("Failed to remove service bindings for service %s network %s endpoint %s while cleanup: %v",
service.id, networkID, epID, err)
}
})
}
}
s.Unlock()
}
for _, f := range cleanupFuncs {
f()
}
}
func (c *controller) addServiceBinding(name, sid, nid, eid string, vip net.IP, ingressPorts []*PortConfig, aliases []string, ip net.IP) error {
n, err := c.NetworkByID(nid)
if err != nil {
return err
}
skey := serviceKey{
id: sid,
ports: portConfigs(ingressPorts).String(),
}
c.Lock()
s, ok := c.serviceBindings[skey]
if !ok {
// Create a new service if we are seeing this service
// for the first time.
s = newService(name, sid, ingressPorts, aliases)
c.serviceBindings[skey] = s
}
c.Unlock()
// 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
if len(svcIP) == 0 {
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()
lb, ok := s.loadBalancers[nid]
if !ok {
// Create a new load balancer if we are seeing this
// network attachment on the service for the first
// time.
lb = &loadBalancer{
vip: vip,
fwMark: fwMarkCtr,
backEnds: make(map[string]net.IP),
service: s,
}
fwMarkCtrMu.Lock()
fwMarkCtr++
fwMarkCtrMu.Unlock()
s.loadBalancers[nid] = lb
}
lb.backEnds[eid] = ip
// Add loadbalancer service and backend in all sandboxes in
// the network only if vip is valid.
if len(vip) != 0 {
n.(*network).addLBBackend(ip, vip, lb.fwMark, ingressPorts)
}
return nil
}
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)
if err != nil {
return err
}
skey := serviceKey{
id: sid,
ports: portConfigs(ingressPorts).String(),
}
c.Lock()
s, ok := c.serviceBindings[skey]
c.Unlock()
if !ok {
return nil
}
s.Lock()
lb, ok := s.loadBalancers[nid]
if !ok {
s.Unlock()
return nil
}
_, ok = lb.backEnds[eid]
if !ok {
s.Unlock()
return nil
}
delete(lb.backEnds, eid)
if len(lb.backEnds) == 0 {
// All the backends for this service have been
// removed. Time to remove the load balancer and also
// remove the service entry in IPVS.
rmService = true
delete(s.loadBalancers, nid)
}
if len(s.loadBalancers) == 0 {
// All loadbalancers for the service removed. Time to
// remove the service itself.
c.Lock()
delete(c.serviceBindings, skey)
c.Unlock()
}
// Remove loadbalancer service(if needed) and backend in all
// sandboxes in the network only if the vip is valid.
if len(vip) != 0 {
n.(*network).rmLBBackend(ip, vip, lb.fwMark, ingressPorts, rmService)
}
s.Unlock()
// 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)
}
// If we are doing DNS RR add the endpoint IP to DNS record
// right away.
if len(vip) == 0 {
n.(*network).deleteSvcRecords(name, ip, nil, false)
for _, alias := range aliases {
n.(*network).deleteSvcRecords(alias, ip, nil, false)
}
}
// Remove the DNS record for VIP only if we are removing the service
if rmService && len(vip) != 0 {
n.(*network).deleteSvcRecords(name, vip, nil, false)
for _, alias := range aliases {
n.(*network).deleteSvcRecords(alias, vip, nil, false)
}
}
return nil
}
|