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Golang ns.Close函数代码示例

本文整理汇总了Golang中github.com/docker/libnetwork/ns.Close函数的典型用法代码示例。如果您正苦于以下问题：Golang Close函数的具体用法？Golang Close怎么用？Golang Close使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。


在下文中一共展示了Close函数的7个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Golang代码示例。

示例1: deleteVxlanByVNI

func deleteVxlanByVNI(path string, vni uint32) error {
	defer osl.InitOSContext()()

	nlh := ns.NlHandle()
	if path != "" {
		ns, err := netns.GetFromPath(path)
		if err != nil {
			return fmt.Errorf("failed to get ns handle for %s: %v", path, err)
		}
		defer ns.Close()

		nlh, err = netlink.NewHandleAt(ns)
		if err != nil {
			return fmt.Errorf("failed to get netlink handle for ns %s: %v", path, err)
		}
		defer nlh.Delete()
	}

	links, err := nlh.LinkList()
	if err != nil {
		return fmt.Errorf("failed to list interfaces while deleting vxlan interface by vni: %v", err)
	}

	for _, l := range links {
		if l.Type() == "vxlan" && (vni == 0 || l.(*netlink.Vxlan).VxlanId == int(vni)) {
			err = nlh.LinkDel(l)
			if err != nil {
				return fmt.Errorf("error deleting vxlan interface with id %d: %v", vni, err)
			}
			return nil
		}
	}

	return fmt.Errorf("could not find a vxlan interface to delete with id %d", vni)
}
开发者ID:Cybertinus，项目名称:docker，代码行数:35，代码来源:ov_utils.go

示例2: redirecter

// Redirecter reexec function.
func redirecter() {
	runtime.LockOSThread()
	defer runtime.UnlockOSThread()

	if len(os.Args) < 4 {
		logrus.Error("invalid number of arguments..")
		os.Exit(1)
	}

	var ingressPorts []*PortConfig
	if os.Args[3] != "" {
		var err error
		ingressPorts, err = readPortsFromFile(os.Args[3])
		if err != nil {
			logrus.Errorf("Failed reading ingress ports file: %v", err)
			os.Exit(2)
		}
	}

	eIP, _, err := net.ParseCIDR(os.Args[2])
	if err != nil {
		logrus.Errorf("Failed to parse endpoint IP %s: %v", os.Args[2], err)
		os.Exit(3)
	}

	rules := [][]string{}
	for _, iPort := range ingressPorts {
		rule := strings.Fields(fmt.Sprintf("-t nat -A PREROUTING -d %s -p %s --dport %d -j REDIRECT --to-port %d",
			eIP.String(), strings.ToLower(PortConfig_Protocol_name[int32(iPort.Protocol)]), iPort.PublishedPort, iPort.TargetPort))
		rules = append(rules, rule)
	}

	ns, err := netns.GetFromPath(os.Args[1])
	if err != nil {
		logrus.Errorf("failed get network namespace %q: %v", os.Args[1], err)
		os.Exit(4)
	}
	defer ns.Close()

	if err := netns.Set(ns); err != nil {
		logrus.Errorf("setting into container net ns %v failed, %v", os.Args[1], err)
		os.Exit(5)
	}

	for _, rule := range rules {
		if err := iptables.RawCombinedOutputNative(rule...); err != nil {
			logrus.Errorf("setting up rule failed, %v: %v", rule, err)
			os.Exit(5)
		}
	}
}
开发者ID:SUSE，项目名称:docker.mirror，代码行数:52，代码来源:service_linux.go

示例3: populateVNITbl

func populateVNITbl() {
	filepath.Walk(filepath.Dir(osl.GenerateKey("walk")),
		func(path string, info os.FileInfo, err error) error {
			_, fname := filepath.Split(path)

			if len(strings.Split(fname, "-")) <= 1 {
				return nil
			}

			ns, err := netns.GetFromPath(path)
			if err != nil {
				logrus.Errorf("Could not open namespace path %s during vni population: %v", path, err)
				return nil
			}
			defer ns.Close()

			nlh, err := netlink.NewHandleAt(ns, syscall.NETLINK_ROUTE)
			if err != nil {
				logrus.Errorf("Could not open netlink handle during vni population for ns %s: %v", path, err)
				return nil
			}
			defer nlh.Delete()

			err = nlh.SetSocketTimeout(soTimeout)
			if err != nil {
				logrus.Warnf("Failed to set the timeout on the netlink handle sockets for vni table population: %v", err)
			}

			links, err := nlh.LinkList()
			if err != nil {
				logrus.Errorf("Failed to list interfaces during vni population for ns %s: %v", path, err)
				return nil
			}

			for _, l := range links {
				if l.Type() == "vxlan" {
					vniTbl[uint32(l.(*netlink.Vxlan).VxlanId)] = path
				}
			}

			return nil
		})
}
开发者ID:jfrazelle，项目名称:docker，代码行数:43，代码来源:ov_network.go

示例4: reexecSetIPv6

func reexecSetIPv6() {
	runtime.LockOSThread()
	defer runtime.UnlockOSThread()

	if len(os.Args) < 3 {
		logrus.Errorf("invalid number of arguments for %s", os.Args[0])
		os.Exit(1)
	}

	ns, err := netns.GetFromPath(os.Args[1])
	if err != nil {
		logrus.Errorf("failed get network namespace %q: %v", os.Args[1], err)
		os.Exit(2)
	}
	defer ns.Close()

	if err = netns.Set(ns); err != nil {
		logrus.Errorf("setting into container netns %q failed: %v", os.Args[1], err)
		os.Exit(3)
	}

	var (
		action = "disable"
		value  = byte('1')
		path   = fmt.Sprintf("/proc/sys/net/ipv6/conf/%s/disable_ipv6", os.Args[2])
	)

	if os.Args[3] == "true" {
		action = "enable"
		value = byte('0')
	}

	if err = ioutil.WriteFile(path, []byte{value, '\n'}, 0644); err != nil {
		logrus.Errorf("failed to %s IPv6 forwarding for container's interface %s: %v", action, os.Args[2], err)
		os.Exit(4)
	}

	os.Exit(0)
}
开发者ID:jwhonce，项目名称:docker，代码行数:39，代码来源:namespace_linux.go

示例5: fwMarker

// Firewall marker reexec function.
func fwMarker() {
	runtime.LockOSThread()
	defer runtime.UnlockOSThread()

	if len(os.Args) < 7 {
		logrus.Error("invalid number of arguments..")
		os.Exit(1)
	}

	var ingressPorts []*PortConfig
	if os.Args[5] != "" {
		buf, err := ioutil.ReadFile(os.Args[5])
		if err != nil {
			logrus.Errorf("Failed to read ports config file: %v", err)
			os.Exit(6)
		}

		var epRec EndpointRecord
		err = proto.Unmarshal(buf, &epRec)
		if err != nil {
			logrus.Errorf("Failed to unmarshal ports config data: %v", err)
			os.Exit(7)
		}

		ingressPorts = epRec.IngressPorts
	}

	vip := os.Args[2]
	fwMark, err := strconv.ParseUint(os.Args[3], 10, 32)
	if err != nil {
		logrus.Errorf("bad fwmark value(%s) passed: %v", os.Args[3], err)
		os.Exit(2)
	}
	addDelOpt := os.Args[4]

	rules := [][]string{}
	for _, iPort := range ingressPorts {
		rule := strings.Fields(fmt.Sprintf("-t nat %s PREROUTING -p %s --dport %d -j REDIRECT --to-port %d",
			addDelOpt, strings.ToLower(PortConfig_Protocol_name[int32(iPort.Protocol)]), iPort.PublishedPort, iPort.TargetPort))
		rules = append(rules, rule)

		rule = strings.Fields(fmt.Sprintf("-t mangle %s PREROUTING -p %s --dport %d -j MARK --set-mark %d",
			addDelOpt, strings.ToLower(PortConfig_Protocol_name[int32(iPort.Protocol)]), iPort.PublishedPort, fwMark))
		rules = append(rules, rule)
	}

	ns, err := netns.GetFromPath(os.Args[1])
	if err != nil {
		logrus.Errorf("failed get network namespace %q: %v", os.Args[1], err)
		os.Exit(3)
	}
	defer ns.Close()

	if err := netns.Set(ns); err != nil {
		logrus.Errorf("setting into container net ns %v failed, %v", os.Args[1], err)
		os.Exit(4)
	}

	if len(ingressPorts) != 0 && addDelOpt == "-A" {
		ruleParams := strings.Fields(fmt.Sprintf("-m ipvs --ipvs -j SNAT --to-source %s", os.Args[6]))
		if !iptables.Exists("nat", "POSTROUTING", ruleParams...) {
			rule := append(strings.Fields("-t nat -A POSTROUTING"), ruleParams...)
			rules = append(rules, rule)

			err := ioutil.WriteFile("/proc/sys/net/ipv4/vs/conntrack", []byte{'1', '\n'}, 0644)
			if err != nil {
				logrus.Errorf("Failed to write to /proc/sys/net/ipv4/vs/conntrack: %v", err)
				os.Exit(8)
			}
		}
	}

	rule := strings.Fields(fmt.Sprintf("-t mangle %s OUTPUT -d %s/32 -j MARK --set-mark %d", addDelOpt, vip, fwMark))
	rules = append(rules, rule)

	for _, rule := range rules {
		if err := iptables.RawCombinedOutputNative(rule...); err != nil {
			logrus.Errorf("setting up rule failed, %v: %v", rule, err)
			os.Exit(5)
		}
	}
}
开发者ID:amitshukla，项目名称:docker，代码行数:83，代码来源:service_linux.go

示例6: redirecter

// Redirecter reexec function.
func redirecter() {
	runtime.LockOSThread()
	defer runtime.UnlockOSThread()

	if len(os.Args) < 4 {
		logrus.Error("invalid number of arguments..")
		os.Exit(1)
	}

	var ingressPorts []*PortConfig
	if os.Args[3] != "" {
		var err error
		ingressPorts, err = readPortsFromFile(os.Args[3])
		if err != nil {
			logrus.Errorf("Failed reading ingress ports file: %v", err)
			os.Exit(2)
		}
	}

	eIP, _, err := net.ParseCIDR(os.Args[2])
	if err != nil {
		logrus.Errorf("Failed to parse endpoint IP %s: %v", os.Args[2], err)
		os.Exit(3)
	}

	rules := [][]string{}
	for _, iPort := range ingressPorts {
		rule := strings.Fields(fmt.Sprintf("-t nat -A PREROUTING -d %s -p %s --dport %d -j REDIRECT --to-port %d",
			eIP.String(), strings.ToLower(PortConfig_Protocol_name[int32(iPort.Protocol)]), iPort.PublishedPort, iPort.TargetPort))
		rules = append(rules, rule)
		// Allow only incoming connections to exposed ports
		iRule := strings.Fields(fmt.Sprintf("-I INPUT -d %s -p %s --dport %d -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT",
			eIP.String(), strings.ToLower(PortConfig_Protocol_name[int32(iPort.Protocol)]), iPort.TargetPort))
		rules = append(rules, iRule)
		// Allow only outgoing connections from exposed ports
		oRule := strings.Fields(fmt.Sprintf("-I OUTPUT -s %s -p %s --sport %d -m conntrack --ctstate ESTABLISHED -j ACCEPT",
			eIP.String(), strings.ToLower(PortConfig_Protocol_name[int32(iPort.Protocol)]), iPort.TargetPort))
		rules = append(rules, oRule)
	}

	ns, err := netns.GetFromPath(os.Args[1])
	if err != nil {
		logrus.Errorf("failed get network namespace %q: %v", os.Args[1], err)
		os.Exit(4)
	}
	defer ns.Close()

	if err := netns.Set(ns); err != nil {
		logrus.Errorf("setting into container net ns %v failed, %v", os.Args[1], err)
		os.Exit(5)
	}

	for _, rule := range rules {
		if err := iptables.RawCombinedOutputNative(rule...); err != nil {
			logrus.Errorf("setting up rule failed, %v: %v", rule, err)
			os.Exit(6)
		}
	}

	if len(ingressPorts) == 0 {
		return
	}

	// Ensure blocking rules for anything else in/to ingress network
	for _, rule := range [][]string{
		{"-d", eIP.String(), "-p", "udp", "-j", "DROP"},
		{"-d", eIP.String(), "-p", "tcp", "-j", "DROP"},
	} {
		if !iptables.ExistsNative(iptables.Filter, "INPUT", rule...) {
			if err := iptables.RawCombinedOutputNative(append([]string{"-A", "INPUT"}, rule...)...); err != nil {
				logrus.Errorf("setting up rule failed, %v: %v", rule, err)
				os.Exit(7)
			}
		}
		rule[0] = "-s"
		if !iptables.ExistsNative(iptables.Filter, "OUTPUT", rule...) {
			if err := iptables.RawCombinedOutputNative(append([]string{"-A", "OUTPUT"}, rule...)...); err != nil {
				logrus.Errorf("setting up rule failed, %v: %v", rule, err)
				os.Exit(8)
			}
		}
	}
}
开发者ID:vdemeester，项目名称:libnetwork，代码行数:84，代码来源:service_linux.go

示例7: fwMarker

// Firewall marker reexec function.
func fwMarker() {
	runtime.LockOSThread()
	defer runtime.UnlockOSThread()

	if len(os.Args) < 7 {
		logrus.Error("invalid number of arguments..")
		os.Exit(1)
	}

	var ingressPorts []*PortConfig
	if os.Args[5] != "" {
		var err error
		ingressPorts, err = readPortsFromFile(os.Args[5])
		if err != nil {
			logrus.Errorf("Failed reading ingress ports file: %v", err)
			os.Exit(6)
		}
	}

	vip := os.Args[2]
	fwMark, err := strconv.ParseUint(os.Args[3], 10, 32)
	if err != nil {
		logrus.Errorf("bad fwmark value(%s) passed: %v", os.Args[3], err)
		os.Exit(2)
	}
	addDelOpt := os.Args[4]

	rules := [][]string{}
	for _, iPort := range ingressPorts {
		rule := strings.Fields(fmt.Sprintf("-t mangle %s PREROUTING -p %s --dport %d -j MARK --set-mark %d",
			addDelOpt, strings.ToLower(PortConfig_Protocol_name[int32(iPort.Protocol)]), iPort.PublishedPort, fwMark))
		rules = append(rules, rule)
	}

	ns, err := netns.GetFromPath(os.Args[1])
	if err != nil {
		logrus.Errorf("failed get network namespace %q: %v", os.Args[1], err)
		os.Exit(3)
	}
	defer ns.Close()

	if err := netns.Set(ns); err != nil {
		logrus.Errorf("setting into container net ns %v failed, %v", os.Args[1], err)
		os.Exit(4)
	}

	if addDelOpt == "-A" {
		eIP, subnet, err := net.ParseCIDR(os.Args[6])
		if err != nil {
			logrus.Errorf("Failed to parse endpoint IP %s: %v", os.Args[6], err)
			os.Exit(9)
		}

		ruleParams := strings.Fields(fmt.Sprintf("-m ipvs --ipvs -d %s -j SNAT --to-source %s", subnet, eIP))
		if !iptables.Exists("nat", "POSTROUTING", ruleParams...) {
			rule := append(strings.Fields("-t nat -A POSTROUTING"), ruleParams...)
			rules = append(rules, rule)

			err := ioutil.WriteFile("/proc/sys/net/ipv4/vs/conntrack", []byte{'1', '\n'}, 0644)
			if err != nil {
				logrus.Errorf("Failed to write to /proc/sys/net/ipv4/vs/conntrack: %v", err)
				os.Exit(8)
			}
		}
	}

	rule := strings.Fields(fmt.Sprintf("-t mangle %s OUTPUT -d %s/32 -j MARK --set-mark %d", addDelOpt, vip, fwMark))
	rules = append(rules, rule)

	rule = strings.Fields(fmt.Sprintf("-t nat %s OUTPUT -p icmp --icmp echo-request -d %s -j DNAT --to 127.0.0.1", addDelOpt, vip))
	rules = append(rules, rule)

	for _, rule := range rules {
		if err := iptables.RawCombinedOutputNative(rule...); err != nil {
			logrus.Errorf("setting up rule failed, %v: %v", rule, err)
			os.Exit(5)
		}
	}
}
开发者ID:harche，项目名称:docker，代码行数:80，代码来源:service_linux.go


注：本文中的github.com/docker/libnetwork/ns.Close函数示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。