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moby--moby/libnetwork/service.go

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package libnetwork
import (
"fmt"
"net"
"sync"
)
var (
// A global monotonic counter to assign firewall marks to
// services.
fwMarkCtr uint32 = 256
fwMarkCtrMu sync.Mutex
)
type portConfigs []*PortConfig
func (p portConfigs) String() string {
if len(p) == 0 {
return ""
}
pc := p[0]
str := fmt.Sprintf("%d:%d/%s", pc.PublishedPort, pc.TargetPort, PortConfig_Protocol_name[int32(pc.Protocol)])
for _, pc := range p[1:] {
str = str + fmt.Sprintf(",%d:%d/%s", pc.PublishedPort, pc.TargetPort, PortConfig_Protocol_name[int32(pc.Protocol)])
}
return str
}
type serviceKey struct {
id string
ports string
}
type service struct {
name string // Service Name
id string // Service ID
// Map of loadbalancers for the service one-per attached
// network. It is keyed with network ID.
loadBalancers map[string]*loadBalancer
// List of ingress ports exposed by the service
ingressPorts portConfigs
sync.Mutex
}
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
// Back pointer to service to which the loadbalancer belongs.
service *service
}