From e88a418528173c1bccc9bea6a9eaf3b389d57e47 Mon Sep 17 00:00:00 2001 From: baude Date: Thu, 30 Apr 2020 11:02:59 -0500 Subject: v2networking enable commands Enable the networking commands for v2. Signed-off-by: baude --- pkg/domain/infra/abi/network.go | 258 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 258 insertions(+) create mode 100644 pkg/domain/infra/abi/network.go (limited to 'pkg/domain/infra/abi') diff --git a/pkg/domain/infra/abi/network.go b/pkg/domain/infra/abi/network.go new file mode 100644 index 000000000..5c39b5374 --- /dev/null +++ b/pkg/domain/infra/abi/network.go @@ -0,0 +1,258 @@ +package abi + +import ( + "context" + "encoding/json" + "fmt" + "io/ioutil" + "path/filepath" + + cniversion "github.com/containernetworking/cni/pkg/version" + "github.com/containers/libpod/libpod" + "github.com/containers/libpod/pkg/domain/entities" + "github.com/containers/libpod/pkg/network" + "github.com/containers/libpod/pkg/util" + "github.com/pkg/errors" +) + +func getCNIConfDir(r *libpod.Runtime) (string, error) { + config, err := r.GetConfig() + if err != nil { + return "", err + } + configPath := config.Network.NetworkConfigDir + + if len(config.Network.NetworkConfigDir) < 1 { + configPath = network.CNIConfigDir + } + return configPath, nil +} + +func (ic *ContainerEngine) NetworkList(ctx context.Context, options entities.NetworkListOptions) ([]*entities.NetworkListReport, error) { + var reports []*entities.NetworkListReport + cniConfigPath, err := getCNIConfDir(ic.Libpod) + if err != nil { + return nil, err + } + networks, err := network.LoadCNIConfsFromDir(cniConfigPath) + if err != nil { + return nil, err + } + + for _, n := range networks { + reports = append(reports, &entities.NetworkListReport{NetworkConfigList: n}) + } + return reports, nil +} + +func (ic *ContainerEngine) NetworkInspect(ctx context.Context, namesOrIds []string, options entities.NetworkInspectOptions) ([]entities.NetworkInspectReport, error) { + var ( + rawCNINetworks []entities.NetworkInspectReport + ) + for _, name := range namesOrIds { + rawList, err := network.InspectNetwork(name) + if err != nil { + return nil, err + } + rawCNINetworks = append(rawCNINetworks, rawList) + } + return rawCNINetworks, nil +} + +func (ic *ContainerEngine) NetworkRm(ctx context.Context, namesOrIds []string, options entities.NetworkRmOptions) ([]*entities.NetworkRmReport, error) { + var reports []*entities.NetworkRmReport + for _, name := range namesOrIds { + report := entities.NetworkRmReport{Name: name} + containers, err := ic.Libpod.GetAllContainers() + if err != nil { + return reports, err + } + // We need to iterate containers looking to see if they belong to the given network + for _, c := range containers { + if util.StringInSlice(name, c.Config().Networks) { + // if user passes force, we nuke containers + if !options.Force { + // Without the force option, we return an error + return reports, errors.Errorf("%q has associated containers with it. Use -f to forcibly delete containers", name) + } + if err := ic.Libpod.RemoveContainer(ctx, c, true, true); err != nil { + return reports, err + } + } + } + if err := network.RemoveNetwork(name); err != nil { + report.Err = err + } + reports = append(reports, &report) + } + return reports, nil +} + +func (ic *ContainerEngine) NetworkCreate(ctx context.Context, name string, options entities.NetworkCreateOptions) (*entities.NetworkCreateReport, error) { + var ( + err error + fileName string + ) + if len(options.MacVLAN) > 0 { + fileName, err = createMacVLAN(ic.Libpod, name, options) + } else { + fileName, err = createBridge(ic.Libpod, name, options) + } + if err != nil { + return nil, err + } + return &entities.NetworkCreateReport{Filename: fileName}, nil +} + +// createBridge creates a CNI network +func createBridge(r *libpod.Runtime, name string, options entities.NetworkCreateOptions) (string, error) { + isGateway := true + ipMasq := true + subnet := &options.Subnet + ipRange := options.Range + runtimeConfig, err := r.GetConfig() + if err != nil { + return "", err + } + // if range is provided, make sure it is "in" network + if subnet.IP != nil { + // if network is provided, does it conflict with existing CNI or live networks + err = network.ValidateUserNetworkIsAvailable(subnet) + } else { + // if no network is provided, figure out network + subnet, err = network.GetFreeNetwork() + } + if err != nil { + return "", err + } + gateway := options.Gateway + if gateway == nil { + // if no gateway is provided, provide it as first ip of network + gateway = network.CalcGatewayIP(subnet) + } + // if network is provided and if gateway is provided, make sure it is "in" network + if options.Subnet.IP != nil && options.Gateway != nil { + if !subnet.Contains(gateway) { + return "", errors.Errorf("gateway %s is not in valid for subnet %s", gateway.String(), subnet.String()) + } + } + if options.Internal { + isGateway = false + ipMasq = false + } + + // if a range is given, we need to ensure it is "in" the network range. + if options.Range.IP != nil { + if options.Subnet.IP == nil { + return "", errors.New("you must define a subnet range to define an ip-range") + } + firstIP, err := network.FirstIPInSubnet(&options.Range) + if err != nil { + return "", err + } + lastIP, err := network.LastIPInSubnet(&options.Range) + if err != nil { + return "", err + } + if !subnet.Contains(firstIP) || !subnet.Contains(lastIP) { + return "", errors.Errorf("the ip range %s does not fall within the subnet range %s", options.Range.String(), subnet.String()) + } + } + bridgeDeviceName, err := network.GetFreeDeviceName() + if err != nil { + return "", err + } + + if len(name) > 0 { + netNames, err := network.GetNetworkNamesFromFileSystem() + if err != nil { + return "", err + } + if util.StringInSlice(name, netNames) { + return "", errors.Errorf("the network name %s is already used", name) + } + } else { + // If no name is given, we give the name of the bridge device + name = bridgeDeviceName + } + + ncList := network.NewNcList(name, cniversion.Current()) + var plugins []network.CNIPlugins + var routes []network.IPAMRoute + + defaultRoute, err := network.NewIPAMDefaultRoute() + if err != nil { + return "", err + } + routes = append(routes, defaultRoute) + ipamConfig, err := network.NewIPAMHostLocalConf(subnet, routes, ipRange, gateway) + if err != nil { + return "", err + } + + // TODO need to iron out the role of isDefaultGW and IPMasq + bridge := network.NewHostLocalBridge(bridgeDeviceName, isGateway, false, ipMasq, ipamConfig) + plugins = append(plugins, bridge) + plugins = append(plugins, network.NewPortMapPlugin()) + plugins = append(plugins, network.NewFirewallPlugin()) + // if we find the dnsname plugin, we add configuration for it + if network.HasDNSNamePlugin(runtimeConfig.Network.CNIPluginDirs) && !options.DisableDNS { + // Note: in the future we might like to allow for dynamic domain names + plugins = append(plugins, network.NewDNSNamePlugin(network.DefaultPodmanDomainName)) + } + ncList["plugins"] = plugins + b, err := json.MarshalIndent(ncList, "", " ") + if err != nil { + return "", err + } + cniConfigPath, err := getCNIConfDir(r) + if err != nil { + return "", err + } + cniPathName := filepath.Join(cniConfigPath, fmt.Sprintf("%s.conflist", name)) + err = ioutil.WriteFile(cniPathName, b, 0644) + return cniPathName, err +} + +func createMacVLAN(r *libpod.Runtime, name string, options entities.NetworkCreateOptions) (string, error) { + var ( + plugins []network.CNIPlugins + ) + liveNetNames, err := network.GetLiveNetworkNames() + if err != nil { + return "", err + } + // Make sure the host-device exists + if !util.StringInSlice(options.MacVLAN, liveNetNames) { + return "", errors.Errorf("failed to find network interface %q", options.MacVLAN) + } + if len(name) > 0 { + netNames, err := network.GetNetworkNamesFromFileSystem() + if err != nil { + return "", err + } + if util.StringInSlice(name, netNames) { + return "", errors.Errorf("the network name %s is already used", name) + } + } else { + name, err = network.GetFreeDeviceName() + if err != nil { + return "", err + } + } + ncList := network.NewNcList(name, cniversion.Current()) + macvlan := network.NewMacVLANPlugin(options.MacVLAN) + plugins = append(plugins, macvlan) + ncList["plugins"] = plugins + b, err := json.MarshalIndent(ncList, "", " ") + if err != nil { + return "", err + } + cniConfigPath, err := getCNIConfDir(r) + if err != nil { + return "", err + } + cniPathName := filepath.Join(cniConfigPath, fmt.Sprintf("%s.conflist", name)) + err = ioutil.WriteFile(cniPathName, b, 0644) + return cniPathName, err +} -- cgit v1.2.3-54-g00ecf