Exemplo n.º 1
0
func cmdAdd(args *skel.CmdArgs) error {
	conf := NetConf{}
	if err := json.Unmarshal(args.StdinData, &conf); err != nil {
		return fmt.Errorf("failed to load netconf: %v", err)
	}

	// run the IPAM plugin and get back the config to apply
	result, err := plugin.ExecAdd(conf.IPAM.Type, args.StdinData)
	if err != nil {
		return err
	}
	if result.IP4 == nil {
		return errors.New("IPAM plugin returned missing IPv4 config")
	}

	hostVethName, err := setupContainerVeth(args.Netns, args.IfName, conf.MTU, result)
	if err != nil {
		return err
	}

	if err = setupHostVeth(hostVethName, result.IP4); err != nil {
		return err
	}

	if conf.IPMasq {
		h := sha512.Sum512([]byte(args.Netns))
		chain := fmt.Sprintf("CNI-%s-%x", conf.Name, h[:8])
		if err = ip.SetupIPMasq(&result.IP4.IP, chain); err != nil {
			return err
		}
	}

	return plugin.PrintResult(result)
}
Exemplo n.º 2
0
func cmdAdd(args *skel.CmdArgs) error {
	n, err := loadNetConf(args.StdinData)
	if err != nil {
		return err
	}

	br, err := setupBridge(n)
	if err != nil {
		return err
	}

	if err = setupVeth(args.Netns, br, args.IfName, n.MTU); err != nil {
		return err
	}

	// run the IPAM plugin and get back the config to apply
	result, err := plugin.ExecAdd(n.IPAM.Type, args.StdinData)
	if err != nil {
		return err
	}

	if result.IP4 == nil {
		return errors.New("IPAM plugin returned missing IPv4 config")
	}

	if result.IP4.Gateway == nil && n.IsGW {
		result.IP4.Gateway = calcGatewayIP(&result.IP4.IP)
	}

	err = ns.WithNetNSPath(args.Netns, false, func(hostNS *os.File) error {
		return plugin.ConfigureIface(args.IfName, result)
	})
	if err != nil {
		return err
	}

	if n.IsGW {
		gwn := &net.IPNet{
			IP:   result.IP4.Gateway,
			Mask: result.IP4.IP.Mask,
		}

		if err = ensureBridgeAddr(br, gwn); err != nil {
			return err
		}

		if err := ip.EnableIP4Forward(); err != nil {
			return fmt.Errorf("failed to enable forwarding: %v", err)
		}
	}

	if n.IPMasq {
		chain := "CNI-" + n.Name
		if err = ip.SetupIPMasq(ip.Network(&result.IP4.IP), chain); err != nil {
			return err
		}
	}

	return result.Print()
}
Exemplo n.º 3
0
func cmdAdd(args *skel.CmdArgs) error {
	n, err := loadConf(args.StdinData)
	if err != nil {
		return err
	}

	netns, err := os.Open(args.Netns)
	if err != nil {
		return fmt.Errorf("failed to open netns %q: %v", netns, err)
	}
	defer netns.Close()

	tmpName, err := ip.RandomVethName()
	if err != nil {
		return err
	}

	if err = createIpvlan(n, tmpName, netns); err != nil {
		return err
	}

	// run the IPAM plugin and get back the config to apply
	result, err := plugin.ExecAdd(n.IPAM.Type, args.StdinData)
	if err != nil {
		return err
	}
	if result.IP4 == nil {
		return errors.New("IPAM plugin returned missing IPv4 config")
	}

	err = ns.WithNetNS(netns, func(_ *os.File) error {
		err := renameLink(tmpName, args.IfName)
		if err != nil {
			return fmt.Errorf("failed to rename ipvlan to %q: %v", args.IfName, err)
		}

		return plugin.ConfigureIface(args.IfName, result)
	})
	if err != nil {
		return err
	}

	if n.IPMasq {
		chain := "CNI-" + n.Name
		if err = ip.SetupIPMasq(ip.Network(&result.IP4.IP), chain); err != nil {
			return err
		}
	}

	return plugin.PrintResult(result)
}
Exemplo n.º 4
0
func delegateAdd(cid string, netconf map[string]interface{}) error {
	netconfBytes, err := json.Marshal(netconf)
	if err != nil {
		return fmt.Errorf("error serializing delegate netconf: %v", err)
	}

	// save the rendered netconf for cmdDel
	if err = saveScratchNetConf(cid, netconfBytes); err != nil {
		return err
	}

	result, err := plugin.ExecAdd(netconf["type"].(string), netconfBytes)
	if err != nil {
		return err
	}

	return result.Print()
}
Exemplo n.º 5
0
func cmdAdd(args *skel.CmdArgs) error {
	n, err := loadNetConf(args.StdinData)
	if err != nil {
		return err
	}

	// run the IPAM plugin and get back the config to apply
	result, err := plugin.ExecAdd(n.IPAM.Type, args.StdinData)
	if err != nil {
		return err
	}

	if result.IP4 == nil {
		return errors.New("IPAM plugin returned missing IPv4 config")
	}

	if result.IP4.Gateway == nil && n.IsGW {
		result.IP4.Gateway = calcGatewayIP(&result.IP4.IP)
	}

	br, err := setupBridge(n, result.IP4)
	if err != nil {
		return err
	}

	if err = setupVeth(args.Netns, br, args.IfName, n.MTU, result); err != nil {
		return err
	}

	if n.IPMasq {
		chain := "CNI-" + n.Name
		if err = ip.SetupIPMasq(ip.Network(&result.IP4.IP), chain); err != nil {
			return err
		}
	}

	return plugin.PrintResult(result)
}