Chun Chen chenchun

debug两台机器ipip是否通

#10.59.194.141上执行下面创建的ipip0网卡：
node=10.59.194.141
peer=10.59.194.154
ip tun add ipip0 mode ipip remote $peer local $node
ip link set ipip0 up
ip add add 192.168.200.1 brd 255.255.255.255 peer 192.168.200.2 dev ipip0
ip ro add 192.168.200.0/24 via 192.168.200.1

In the diagram below you can see the full authentication flow with all options, starting with the browser on the lower left hand side.


Kubernetes                                                  Workstation
+---------------------------------------------------+     +------------------+
|                                                   |     |                  |
|  +-----------+   apiserver        +------------+  |     |  +------------+  |
|  |           |   proxy            |            |  |     |  |            |  |
|  | apiserver |                    |  ingress   |  |     |  |  ingress   |  |

v2 http api https://coreos.com/etcd/docs/latest/v2/api.html

etcd compaction https://github.com/coreos/etcd/blob/master/Documentation/op-guide/maintenance.md#space-quota

The followings are v3 apis

put/get

export ETCDCTL_API=3

TODO https://www.microsoft.com/en-us/research/wp-content/uploads/2008/02/tr-2008-25.pdf

https://github.com/XiaoMi/pegasus

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	主机1--路由器1--网络--路由器2--主机2
	这样的组网模型中，从主机1 ping 主机2，网络通信的基本原理是怎样的？

	2、路由基本原理
	将整个ping包过程进行分解，步骤如下：
	1）主机1发送ping包前，需要先进行arp相关操作，具体包括：
	（1）检查dst ip和local ip，如果不是在同一个网段(本例就不是一个网段)，则查看本地arp缓存，确认是否有网关(路由器1)IP对应的mac地址，如果没有，则向网关发送arp请求包。
	（2）本地网关收到其arp包后，回复相应的mac地址。
	（3）主机1收到arp回复，得到网关mac，更新相应的arp缓存。
	2）主机向路由器1发送ping数据包，数据包的dst IP仍为主机2的IP，但dst MAC为路由器1的MAC。

	func ip2int(ip net.IP) uint32 {
	if len(ip) == 16 {
	return binary.BigEndian.Uint32(ip[12:16])
	}
	return binary.BigEndian.Uint32(ip)
	}

	func int2ip(nn uint32) net.IP {
	ip := make(net.IP, 4)
	binary.BigEndian.PutUint32(ip, nn)

	## 10.2.0.3
	ip link add vxlan0 type vxlan id 2 dev eth1 dstport 8472
	ip link set dev vxlan0 address 72:74:8b:9d:56:e4
	ip link set dev vxlan0 up
	ip ad add 192.168.50.1/24 dev vxlan0

	vxlan_dev=vxlan0
	peer_vxlan_mac=3e:33:f7:c5:a3:5b
	peer_vxlan_ip=192.168.50.2
	peer_host_ip=10.2.0.2

	#!/usr/bin/expect -f
	set node [lindex $argv 0]
	set passwd [lindex $argv 1]
	set timeout 30
	spawn ssh root@$node
	expect {
	"yes/no" { send "yes\r";exp_continue }
	"password:" { send "$passwd\r" }
	}
	expect "*#"

	ip link add br0 type bridge
	ip link add br1 type bridge
	ip link add dev v0 type veth peer name v1
	ip link set v0 master br0
	ip link set v1 master br1
	ip link set br0 up
	ip link set br1 up
	ip link set v0 up
	ip link set v1 up
	ip ad add 192.168.0.1/24 dev br0