371 lines
11 KiB
Go
371 lines
11 KiB
Go
package daemon
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import (
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"fmt"
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"net"
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"strings"
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"github.com/Sirupsen/logrus"
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clustertypes "github.com/docker/docker/daemon/cluster/provider"
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"github.com/docker/docker/errors"
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"github.com/docker/docker/runconfig"
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"github.com/docker/engine-api/types"
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"github.com/docker/engine-api/types/network"
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"github.com/docker/libnetwork"
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networktypes "github.com/docker/libnetwork/types"
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)
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// NetworkControllerEnabled checks if the networking stack is enabled.
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// This feature depends on OS primitives and it's disabled in systems like Windows.
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func (daemon *Daemon) NetworkControllerEnabled() bool {
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return daemon.netController != nil
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}
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// FindNetwork function finds a network for a given string that can represent network name or id
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func (daemon *Daemon) FindNetwork(idName string) (libnetwork.Network, error) {
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// Find by Name
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n, err := daemon.GetNetworkByName(idName)
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if err != nil && !isNoSuchNetworkError(err) {
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return nil, err
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}
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if n != nil {
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return n, nil
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}
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// Find by id
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return daemon.GetNetworkByID(idName)
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}
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func isNoSuchNetworkError(err error) bool {
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_, ok := err.(libnetwork.ErrNoSuchNetwork)
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return ok
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}
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// GetNetworkByID function returns a network whose ID begins with the given prefix.
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// It fails with an error if no matching, or more than one matching, networks are found.
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func (daemon *Daemon) GetNetworkByID(partialID string) (libnetwork.Network, error) {
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list := daemon.GetNetworksByID(partialID)
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if len(list) == 0 {
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return nil, libnetwork.ErrNoSuchNetwork(partialID)
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}
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if len(list) > 1 {
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return nil, libnetwork.ErrInvalidID(partialID)
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}
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return list[0], nil
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}
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// GetNetworkByName function returns a network for a given network name.
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func (daemon *Daemon) GetNetworkByName(name string) (libnetwork.Network, error) {
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c := daemon.netController
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if c == nil {
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return nil, libnetwork.ErrNoSuchNetwork(name)
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}
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if name == "" {
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name = c.Config().Daemon.DefaultNetwork
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}
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return c.NetworkByName(name)
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}
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// GetNetworksByID returns a list of networks whose ID partially matches zero or more networks
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func (daemon *Daemon) GetNetworksByID(partialID string) []libnetwork.Network {
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c := daemon.netController
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if c == nil {
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return nil
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}
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list := []libnetwork.Network{}
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l := func(nw libnetwork.Network) bool {
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if strings.HasPrefix(nw.ID(), partialID) {
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list = append(list, nw)
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}
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return false
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}
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c.WalkNetworks(l)
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return list
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}
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// getAllNetworks returns a list containing all networks
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func (daemon *Daemon) getAllNetworks() []libnetwork.Network {
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c := daemon.netController
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list := []libnetwork.Network{}
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l := func(nw libnetwork.Network) bool {
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list = append(list, nw)
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return false
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}
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c.WalkNetworks(l)
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return list
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}
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func isIngressNetwork(name string) bool {
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return name == "ingress"
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}
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var ingressChan = make(chan struct{}, 1)
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func ingressWait() func() {
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ingressChan <- struct{}{}
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return func() { <-ingressChan }
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}
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// SetupIngress setups ingress networking.
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func (daemon *Daemon) SetupIngress(create clustertypes.NetworkCreateRequest, nodeIP string) error {
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ip, _, err := net.ParseCIDR(nodeIP)
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if err != nil {
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return err
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}
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go func() {
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controller := daemon.netController
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controller.AgentInitWait()
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if n, err := daemon.GetNetworkByName(create.Name); err == nil && n != nil && n.ID() != create.ID {
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if err := controller.SandboxDestroy("ingress-sbox"); err != nil {
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logrus.Errorf("Failed to delete stale ingress sandbox: %v", err)
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return
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}
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if err := n.Delete(); err != nil {
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logrus.Errorf("Failed to delete stale ingress network %s: %v", n.ID(), err)
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return
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}
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}
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if _, err := daemon.createNetwork(create.NetworkCreateRequest, create.ID, true); err != nil {
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// If it is any other error other than already
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// exists error log error and return.
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if _, ok := err.(libnetwork.NetworkNameError); !ok {
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logrus.Errorf("Failed creating ingress network: %v", err)
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return
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}
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// Otherwise continue down the call to create or recreate sandbox.
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}
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n, err := daemon.GetNetworkByID(create.ID)
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if err != nil {
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logrus.Errorf("Failed getting ingress network by id after creating: %v", err)
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return
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}
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sb, err := controller.NewSandbox("ingress-sbox", libnetwork.OptionIngress())
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if err != nil {
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logrus.Errorf("Failed creating ingress sanbox: %v", err)
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return
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}
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ep, err := n.CreateEndpoint("ingress-endpoint", libnetwork.CreateOptionIpam(ip, nil, nil, nil))
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if err != nil {
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logrus.Errorf("Failed creating ingress endpoint: %v", err)
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return
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}
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if err := ep.Join(sb, nil); err != nil {
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logrus.Errorf("Failed joining ingress sandbox to ingress endpoint: %v", err)
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}
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}()
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return nil
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}
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// SetNetworkBootstrapKeys sets the bootstrap keys.
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func (daemon *Daemon) SetNetworkBootstrapKeys(keys []*networktypes.EncryptionKey) error {
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return daemon.netController.SetKeys(keys)
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}
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// CreateManagedNetwork creates an agent network.
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func (daemon *Daemon) CreateManagedNetwork(create clustertypes.NetworkCreateRequest) error {
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_, err := daemon.createNetwork(create.NetworkCreateRequest, create.ID, true)
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return err
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}
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// CreateNetwork creates a network with the given name, driver and other optional parameters
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func (daemon *Daemon) CreateNetwork(create types.NetworkCreateRequest) (*types.NetworkCreateResponse, error) {
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resp, err := daemon.createNetwork(create, "", false)
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if err != nil {
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return nil, err
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}
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return resp, err
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}
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func (daemon *Daemon) createNetwork(create types.NetworkCreateRequest, id string, agent bool) (*types.NetworkCreateResponse, error) {
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// If there is a pending ingress network creation wait here
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// since ingress network creation can happen via node download
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// from manager or task download.
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if isIngressNetwork(create.Name) {
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defer ingressWait()()
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}
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if runconfig.IsPreDefinedNetwork(create.Name) && !agent {
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err := fmt.Errorf("%s is a pre-defined network and cannot be created", create.Name)
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return nil, errors.NewRequestForbiddenError(err)
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}
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var warning string
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nw, err := daemon.GetNetworkByName(create.Name)
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if err != nil {
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if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
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return nil, err
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}
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}
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if nw != nil {
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if create.CheckDuplicate {
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return nil, libnetwork.NetworkNameError(create.Name)
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}
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warning = fmt.Sprintf("Network with name %s (id : %s) already exists", nw.Name(), nw.ID())
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}
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c := daemon.netController
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driver := create.Driver
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if driver == "" {
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driver = c.Config().Daemon.DefaultDriver
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}
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ipam := create.IPAM
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v4Conf, v6Conf, err := getIpamConfig(ipam.Config)
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if err != nil {
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return nil, err
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}
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nwOptions := []libnetwork.NetworkOption{
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libnetwork.NetworkOptionIpam(ipam.Driver, "", v4Conf, v6Conf, ipam.Options),
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libnetwork.NetworkOptionEnableIPv6(create.EnableIPv6),
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libnetwork.NetworkOptionDriverOpts(create.Options),
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libnetwork.NetworkOptionLabels(create.Labels),
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}
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if create.Internal {
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nwOptions = append(nwOptions, libnetwork.NetworkOptionInternalNetwork())
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}
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if agent {
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nwOptions = append(nwOptions, libnetwork.NetworkOptionDynamic())
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nwOptions = append(nwOptions, libnetwork.NetworkOptionPersist(false))
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}
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if isIngressNetwork(create.Name) {
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nwOptions = append(nwOptions, libnetwork.NetworkOptionIngress())
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}
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n, err := c.NewNetwork(driver, create.Name, id, nwOptions...)
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if err != nil {
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return nil, err
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}
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daemon.LogNetworkEvent(n, "create")
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return &types.NetworkCreateResponse{
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ID: n.ID(),
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Warning: warning,
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}, nil
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}
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func getIpamConfig(data []network.IPAMConfig) ([]*libnetwork.IpamConf, []*libnetwork.IpamConf, error) {
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ipamV4Cfg := []*libnetwork.IpamConf{}
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ipamV6Cfg := []*libnetwork.IpamConf{}
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for _, d := range data {
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iCfg := libnetwork.IpamConf{}
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iCfg.PreferredPool = d.Subnet
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iCfg.SubPool = d.IPRange
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iCfg.Gateway = d.Gateway
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iCfg.AuxAddresses = d.AuxAddress
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ip, _, err := net.ParseCIDR(d.Subnet)
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if err != nil {
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return nil, nil, fmt.Errorf("Invalid subnet %s : %v", d.Subnet, err)
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}
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if ip.To4() != nil {
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ipamV4Cfg = append(ipamV4Cfg, &iCfg)
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} else {
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ipamV6Cfg = append(ipamV6Cfg, &iCfg)
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}
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}
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return ipamV4Cfg, ipamV6Cfg, nil
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}
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// UpdateContainerServiceConfig updates a service configuration.
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func (daemon *Daemon) UpdateContainerServiceConfig(containerName string, serviceConfig *clustertypes.ServiceConfig) error {
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container, err := daemon.GetContainer(containerName)
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if err != nil {
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return err
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}
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container.NetworkSettings.Service = serviceConfig
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return nil
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}
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// ConnectContainerToNetwork connects the given container to the given
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// network. If either cannot be found, an err is returned. If the
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// network cannot be set up, an err is returned.
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func (daemon *Daemon) ConnectContainerToNetwork(containerName, networkName string, endpointConfig *network.EndpointSettings) error {
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container, err := daemon.GetContainer(containerName)
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if err != nil {
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return err
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}
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return daemon.ConnectToNetwork(container, networkName, endpointConfig)
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}
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// DisconnectContainerFromNetwork disconnects the given container from
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// the given network. If either cannot be found, an err is returned.
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func (daemon *Daemon) DisconnectContainerFromNetwork(containerName string, network libnetwork.Network, force bool) error {
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container, err := daemon.GetContainer(containerName)
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if err != nil {
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if force {
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return daemon.ForceEndpointDelete(containerName, network)
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}
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return err
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}
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return daemon.DisconnectFromNetwork(container, network, force)
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}
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// GetNetworkDriverList returns the list of plugins drivers
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// registered for network.
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func (daemon *Daemon) GetNetworkDriverList() map[string]bool {
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pluginList := make(map[string]bool)
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if !daemon.NetworkControllerEnabled() {
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return nil
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}
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c := daemon.netController
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networks := c.Networks()
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for _, network := range networks {
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driver := network.Type()
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pluginList[driver] = true
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}
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// TODO : Replace this with proper libnetwork API
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pluginList["overlay"] = true
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return pluginList
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}
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// DeleteManagedNetwork deletes an agent network.
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func (daemon *Daemon) DeleteManagedNetwork(networkID string) error {
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return daemon.deleteNetwork(networkID, true)
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}
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// DeleteNetwork destroys a network unless it's one of docker's predefined networks.
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func (daemon *Daemon) DeleteNetwork(networkID string) error {
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return daemon.deleteNetwork(networkID, false)
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}
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func (daemon *Daemon) deleteNetwork(networkID string, dynamic bool) error {
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nw, err := daemon.FindNetwork(networkID)
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if err != nil {
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return err
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}
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if runconfig.IsPreDefinedNetwork(nw.Name()) && !dynamic {
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err := fmt.Errorf("%s is a pre-defined network and cannot be removed", nw.Name())
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return errors.NewRequestForbiddenError(err)
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}
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if err := nw.Delete(); err != nil {
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return err
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}
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daemon.LogNetworkEvent(nw, "destroy")
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return nil
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}
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// GetNetworks returns a list of all networks
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func (daemon *Daemon) GetNetworks() []libnetwork.Network {
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return daemon.getAllNetworks()
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}
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