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93 lines
2.3 KiB
Go
93 lines
2.3 KiB
Go
package libnetwork
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import (
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"fmt"
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"net"
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"sync"
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"github.com/docker/libnetwork/common"
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)
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var (
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// A global monotonic counter to assign firewall marks to
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// services.
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fwMarkCtr uint32 = 256
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fwMarkCtrMu sync.Mutex
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)
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type portConfigs []*PortConfig
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func (p portConfigs) String() string {
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if len(p) == 0 {
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return ""
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}
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pc := p[0]
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str := fmt.Sprintf("%d:%d/%s", pc.PublishedPort, pc.TargetPort, PortConfig_Protocol_name[int32(pc.Protocol)])
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for _, pc := range p[1:] {
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str = str + fmt.Sprintf(",%d:%d/%s", pc.PublishedPort, pc.TargetPort, PortConfig_Protocol_name[int32(pc.Protocol)])
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}
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return str
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}
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type serviceKey struct {
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id string
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ports string
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}
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type service struct {
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name string // Service Name
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id string // Service ID
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// Map of loadbalancers for the service one-per attached
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// network. It is keyed with network ID.
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loadBalancers map[string]*loadBalancer
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// List of ingress ports exposed by the service
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ingressPorts portConfigs
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// Service aliases
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aliases []string
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// This maps tracks for each IP address the list of endpoints ID
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// associated with it. At stable state the endpoint ID expected is 1
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// but during transition and service change it is possible to have
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// temporary more than 1
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ipToEndpoint common.SetMatrix
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deleted bool
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sync.Mutex
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}
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// assignIPToEndpoint inserts the mapping between the IP and the endpoint identifier
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// returns true if the mapping was not present, false otherwise
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// returns also the number of endpoints associated to the IP
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func (s *service) assignIPToEndpoint(ip, eID string) (bool, int) {
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return s.ipToEndpoint.Insert(ip, eID)
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}
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// removeIPToEndpoint removes the mapping between the IP and the endpoint identifier
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// returns true if the mapping was deleted, false otherwise
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// returns also the number of endpoints associated to the IP
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func (s *service) removeIPToEndpoint(ip, eID string) (bool, int) {
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return s.ipToEndpoint.Remove(ip, eID)
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}
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func (s *service) printIPToEndpoint(ip string) (string, bool) {
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return s.ipToEndpoint.String(ip)
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}
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type loadBalancer struct {
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vip net.IP
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fwMark uint32
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// Map of backend IPs backing this loadbalancer on this
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// network. It is keyed with endpoint ID.
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backEnds map[string]net.IP
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// Back pointer to service to which the loadbalancer belongs.
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service *service
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sync.Mutex
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}
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