Merge pull request #6057 from baude/v2networking

v2networking enable commands

1 files changed, 258 insertions, 0 deletions

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
+}