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reworked allocatePorts

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Signed-off-by: Benjamin Böhmke <benjamin@boehmke.net>
This commit is contained in:
Benjamin Böhmke 2020-07-22 15:43:02 +02:00
parent 9f98bd79d8
commit 648d891827
3 changed files with 24 additions and 21 deletions
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31
libnetwork/drivers/bridge/port_mapping.go
View file

@ -26,23 +26,28 @@ func (n *bridgeNetwork) allocatePorts(ep *bridgeEndpoint, reqDefBindIP net.IP, u
defHostIP = reqDefBindIP defHostIP = reqDefBindIP
} }
var pb []types.PortBinding // IPv4 port binding including user land proxy
pb, err := n.allocatePortsInternal(ep.extConnConfig.PortBindings, ep.addr.IP, defHostIP, ulPxyEnabled)
if ep.addrv6 != nil { if err != nil {
pb, _ = n.allocatePortsInternal(ep.extConnConfig.PortBindings, ep.addrv6.IP, defaultBindingIPV6, ulPxyEnabled, nil) return nil, err
} }
return n.allocatePortsInternal(ep.extConnConfig.PortBindings, ep.addr.IP, defHostIP, ulPxyEnabled, pb) // IPv6 port binding excluding user land proxy
if n.driver.config.EnableIP6Tables && ep.addrv6 != nil {
pbv6, err := n.allocatePortsInternal(ep.extConnConfig.PortBindings, ep.addrv6.IP, defaultBindingIPV6, false)
if err != nil {
// ensure we clear the previous allocated IPv4 ports
n.releasePortsInternal(pb)
return nil, err
}
pb = append(pb, pbv6...)
}
return pb, nil
} }
func (n *bridgeNetwork) allocatePortsInternal(bindings []types.PortBinding, containerIP, defHostIP net.IP, ulPxyEnabled bool, existingPortBindings []types.PortBinding) ([]types.PortBinding, error) { func (n *bridgeNetwork) allocatePortsInternal(bindings []types.PortBinding, containerIP, defHostIP net.IP, ulPxyEnabled bool) ([]types.PortBinding, error) {
bs := make([]types.PortBinding, 0, len(bindings))
bs := existingPortBindings
if existingPortBindings == nil {
bs = make([]types.PortBinding, 0, len(bindings))
}
for _, c := range bindings { for _, c := range bindings {
b := c.GetCopy() b := c.GetCopy()
if err := n.allocatePort(&b, containerIP, defHostIP, ulPxyEnabled); err != nil { if err := n.allocatePort(&b, containerIP, defHostIP, ulPxyEnabled); err != nil {

2
libnetwork/libnetwork_test.go
View file

@ -195,7 +195,7 @@ func TestBridge(t *testing.T) {
if !ok { if !ok {
t.Fatalf("Unexpected format for port mapping in endpoint operational data") t.Fatalf("Unexpected format for port mapping in endpoint operational data")
} }
if len(pm) != 10 { if len(pm) != 5 {
t.Fatalf("Incomplete data for port mapping in endpoint operational data: %d", len(pm)) t.Fatalf("Incomplete data for port mapping in endpoint operational data: %d", len(pm))
} }
} }

12
libnetwork/portmapper/mapper.go
View file

@ -160,7 +160,7 @@ func (pm *PortMapper) MapRange(container net.Addr, hostIP net.IP, hostPortStart,
cleanup := func() error { cleanup := func() error {
// need to undo the iptables rules before we return // need to undo the iptables rules before we return
m.userlandProxy.Stop() m.userlandProxy.Stop()
if hostIP.To4() != nil { if hostIP.To4() != nil || hostIP.To16() != nil {
pm.DeleteForwardingTableEntry(m.proto, hostIP, allocatedHostPort, containerIP.String(), containerPort) pm.DeleteForwardingTableEntry(m.proto, hostIP, allocatedHostPort, containerIP.String(), containerPort)
if err := pm.Allocator.ReleasePort(hostIP, m.proto, allocatedHostPort); err != nil { if err := pm.Allocator.ReleasePort(hostIP, m.proto, allocatedHostPort); err != nil {
return err return err
@ -170,13 +170,11 @@ func (pm *PortMapper) MapRange(container net.Addr, hostIP net.IP, hostPortStart,
return nil return nil
} }
if hostIP.To4() != nil { if err := m.userlandProxy.Start(); err != nil {
if err := m.userlandProxy.Start(); err != nil { if err := cleanup(); err != nil {
if err := cleanup(); err != nil { return nil, fmt.Errorf("Error during port allocation cleanup: %v", err)
return nil, fmt.Errorf("Error during port allocation cleanup: %v", err)
}
return nil, err
} }
return nil, err
} }
pm.currentMappings[key] = m pm.currentMappings[key] = m