NameCom DDNS 解决方案
Namecom
众所周知 name.com 是一家域名注册商，相比较 Godaddy 它界面简洁操作方便，早年便从 Godaddy 转投了 name.com。
DDNS
家里用的是 DD-WRT 路由器，花生壳 ddns 时常不好用，很是烦恼，于是有了这个写个 python 脚本自动更新 IP的想法。
由于已经在 name.com 购买了一个域名，于是就像通过增加一个子域名 DNS Record 来实现 DDNS。 原理就是在路由器上跑一个脚本，每隔一段时间检查当前 IP 地址是否有变更，如果有则更新 name.com 上的记录。
开发过程很简单，首先提交一个 API Application Form 的申请，通过后会得到一个 API Token，然后通过 JSON 提交奥 http request 与 name.com 交互。
参考文档：
- http://www.name.com/reseller/apply
- https://www.name.com/reseller
- https://www.name.com/reseller/API-documentation
另外我将这个项目的源码放到了 github 上，有兴趣的可以看一下：
搬家到 BudgetVM
Burst VPS
用了3年的 Burst VPS 破产了，于今天正式倒闭。之前选择 Burst VPS 就是因为便宜，没曾想突然倒闭了，交了一年的钱还剩三个月左右，官方也不给退款了。不过有提前通知，数据什么的早就有定时备份。
Budget VPS
于是乎迁移到了 BudegtVM, 虽然数据没丢，但对于一个长期用 wordpress 的人来说很是折腾，各种重装，各种重新配置，不喜欢折腾了。为什么选择它呢？ 还是因为便宜。
我购买的是如下套餐:
- Linux VPS (OpenVZ) – 1024MB VPS</p>
- 1024MB Ram
- 2048MB Ram Burst
- 4 E5-2620 CPU Core
- 80GB Disk Space
- 3000GB Bandwidth
- 3 IPv4 IP Address
- 16 IPv6 IP Address
由于是 openvz 的 VM 有如下限制:
- 只能装 Linux(可选择的发行版挺多的)
- VPN 只能搞 openvpn, 翻墙的话建议 ssh -D
价格还行，买一年的话一个月 4 刀,开通速度也挺快的，没有购买其他 Control Panel, 只有一个很简单的。
总之个人觉得性价比还是挺高的，ping 值也还行，希望它坚挺些，别倒闭了，不想再折腾了。
2013 让我欢喜让我忧
2013 年还有一个月就要过去了，年初信誓旦旦的定下了几个目标，如今在时间和现实面前显得那么的苍白。惭愧啊，总体来说这一年四个字差强人意吧。
工作
最近工作上有了些变动，transfer 到隔壁组做起了一个开发的工作，虽不是纯内核开发，但是觉得还是对自己有很大的锻炼价值，至少离我的目标更近了一步。有的时候期望越大恐怕失望就越大，还是保持一颗平常心吧，改掉一些坏习惯比如说眼高手低，努力把工作做好。
同时也感谢下以前的 Manager 以及所有帮过我的人，感谢你们在工作中给予的支持与帮助。
生活
作为一个北漂，来到这个陌生的城市纯粹是为了工作，我实在是找不到其它理由。北漂生活说实话苦，厌倦了租房，厌倦了糟糕的空气，更厌倦了挤公交地铁时的情景。有的时候就会问自己为什么明明不喜欢还要留下，满五年然后买房，然后用一辈子的时间来还贷，辛辛苦苦一辈子就为了买个房子 ?
想想这一年，每次最最开心的时候就是回家了。虽说从高中的时候就离开父母独自生活了，但是多愁善感的我每次走的时候还是那么的不舍，表面上装的很坚强很不屑，看着他们离去的背影心里还是那么的不好受。父母日渐老去，他们不指望着你能挣多少多少钱让他们能过上多么幸福的生活，只希望能多陪陪他们。我知道我没出息，男子汉应该志在四方，不能太在乎儿女情长，可是这就是最最真实的我啊。
而我确实也希望能有一个很好的事业。这个世道，钱的多少是检验一个男人成功与否的唯一标准，哎，做人难，做男人更难 。。。有的时候确实很纠结啊。
其它
作为一个 IT 屌丝，每天的业余的生活大家也都懂得，不是无聊，是相当无聊。
关于女朋友这个事情自己确实没有那么着急，可是身边的同事啊朋友啊大多数都有妹子了，有时候被刺激的确实受不了了。所以最近为了排遣寂寞，自己每天下班坚持看书，希望能在书的海洋中找回已经在寂寞中迷失的自己。
突然想起一句歌词：
迟两秒搭上
地下铁能与你碰上么
如提前十步
入电梯谁又被错过
和某某从来
未预约为何能见更多
全城来撞你
但最后处处有险阻
有些事情真的是力不从心啊，反正一切事情不强求顺其自然吧 。。。
2014
希望自己在新的一年中一切尽量顺利吧，说心想事成绝对是扯淡。
OVS LISP Tunnel Configuration
Install
-
git clone git://git.openvswitch.org/openvswitch -
cd openvswitch -
./boot.sh -
./configure --with-linux=/lib/modules/${uname -r}/build -
make -
make install;make modules_install -
modprobe openvswitch -
mkdir -p /usr/local/etc/openvswitch -
ovsdb-tool create /usr/local/etc/openvswitch/conf.db vswitchd/vswitch.ovsschema
Startup
-
ovsdb-server –remote=punix:/usr/local/var/run/openvswitch/db.sock
–remote=db:Open_vSwitch,Open_vSwitch,manager_options
–private-key=db:Open_vSwitch,SSL,private_key
–certificate=db:Open_vSwitch,SSL,certificate
–bootstrap-ca-cert=db:Open_vSwitch,SSL,ca_cert
–pidfile –detach -
ovs-vsctl --no-wait init -
ovs-vswitchd --pidfile --detach
LISP Tunnel Configuration
Topo
+---+ +---+
|VM1| |VM2|
+---+ +---+
| |
+-- vnet0 --+ +-- vnet0 --+
| | | |
lisp0 OVS1 eth0--------------------eth0 OVS2 lisp0
| | | |
+-----------+ +-----------+
Host1 Host2
Configuration
- Host1
ovs-vsctl add-br br1ovs-vsctl add-br br2ovs-vsctl add-port br1 em1ifconfig em1 0;dhclient br1ifconfig br2 10.1.1.1 netmask 255.255.255.0ovs-vsctl add-port br2 lisp0 -- set Interface lisp0 type=lisp options:remote_ip=192.168.1.252
192.168.1.252 is Host2 eth0’s ip addressovs-ofctl add-flow br2 "priority=0,action=NORMAL"ovs-ofctl add-flow br2 "priority=2,in_port=1,dl_type=0x0806,action=NORMAL"ovs-ofctl add-flow br2 "priority=3,dl_dst=02:00:00:00:00:00,action=mod_dl_dst:52:54:00:B8:27:75,output:1"
52:54:00:B8:27:75 is VM1’s mac addressovs-ofctl add-flow br2 "priority=1,in_port=1,dl_type=0x0800,vlan_tci=0,nw_src=10.1.1.0/24,action=output:2"
- VM1
virsh dumpxml kvm1 > domain.xml- search the XML
section and change it to something like this: virsh create domain.xmlifconfig eth3 upifconfig eth3 10.1.1.20 netmask 255.255.255.0echo "10.1.1.30 52:54:00:1B:EA:D5" > /etc/ethers-
arp -f /etc/ethers<interface type='bridge'> <mac address='52:54:00:b8:27:75'/> <source bridge='br2'/> <virtualport type='openvswitch'> </virtualport> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface>ovs-vsctl show
390982aa-7bf6-4dfd-84eb-76fe7654e73d Bridge “br2” Port “vnet0” Interface “vnet0” Port “lisp0” Interface “lisp0” type: lisp options: {remote_ip=”192.168.1.252”} Port “br2” Interface “br2” type: internal Bridge “br1” Port “br1” Interface “br1” type: internal Port “em1” Interface “em1”
ovs-ofctl show br2
OFPT_FEATURES_REPLY (xid=0x2): dpid:00008ad828ce7949 n_tables:254, n_buffers:256 capabilities: FLOW_STATS TABLE_STATS PORT_STATS QUEUE_STATS ARP_MATCH_IP actions: OUTPUT SET_VLAN_VID SET_VLAN_PCP STRIP_VLAN SET_DL_SRC SET_DL_DST SET_NW_SRC SET_NW_DST SET_NW_TOS SET_TP_SRC SET_T P_DST ENQUEUE 1(vnet0): addr:fe:54:00:b8:27:75 config: 0 state: 0 current: 10MB-FD COPPER speed: 10 Mbps now, 0 Mbps max 2(lisp0): addr:36:d5:4f:15:c0:7a config: 0 state: 0 speed: 0 Mbps now, 0 Mbps max LOCAL(br2): addr:8a:d8:28:ce:79:49 config: 0 state: 0 speed: 0 Mbps now, 0 Mbps max OFPT_GET_CONFIG_REPLY (xid=0x4): frags=normal miss_send_len=0
ovs-ofctl dump-ports br2
OFPST_PORT reply (xid=0x2): 3 ports port 1: rx pkts=609, bytes=58706, drop=0, errs=0, frame=0, over=0, crc=0 tx pkts=341, bytes=33418, drop=0, errs=0, coll=0 port 2: rx pkts=429, bytes=42042, drop=0, errs=0, frame=0, over=0, crc=0 tx pkts=582, bytes=56532, drop=0, errs=0, coll=0 port LOCAL: rx pkts=6, bytes=468, drop=0, errs=0, frame=0, over=0, crc=0 tx pkts=296, bytes=28032, drop=0, errs=0, coll=0
ovs-ofctl dump-flows br2
NXST_FLOW reply (xid=0x4): cookie=0x0, duration=1615.828s, table=0, n_packets=195, n_bytes=19110, idle_age=1378, priority=3,dl_dst=02:00:00:00:00:00 a ctions=mod_dl_dst:52:54:00:b8:27:75,output:1 cookie=0x0, duration=1717.963s, table=0, n_packets=326, n_bytes=31948, idle_age=1539, priority=0 actions=NORMAL cookie=0x0, duration=1519.394s, table=0, n_packets=101, n_bytes=9898, idle_age=1378, priority=1,ip,in_port=1,vlan_tci=0x000 0,nw_src=10.1.1.0/24 actions=output:2 cookie=0x0, duration=1667.873s, table=0, n_packets=0, n_bytes=0, idle_age=1667, priority=2,arp,in_port=1 actions=NORMAL
- Host2
ovs-vsctl add-br br1ovs-vsctl add-br br2ovs-vsctl add-port br1 eth0ifconfig em1 0;dhclient br1ifconfig br2 10.1.1.2 netmask 255.255.255.0ovs-vsctl add-port br2 lisp0 -- set Interface lisp0 type=lisp options:remote_ip=192.168.1.249ovs-ofctl add-flow br2 "priority=0,action=NORMAL"ovs-ofctl add-flow br2 "priority=2,in_port=1,dl_type=0x0806,action=NORMAL"ovs-ofctl add-flow br2 "priority=3,dl_dst=02:00:00:00:00:00,action=mod_dl_dst:52:54:00:1B:EA:D5,output:1"52:54:00:1B:EA:D5 is VM2’s mac addressovs-ofctl add-flow br2 "priority=1,in_port=1,dl_type=0x0800,vlan_tci=0,nw_src=10.1.1.0/24,action=output:2"
- VM2
- redid the configuration as VM1
ifconfig eth5 upifconfig eth5 10.1.1.30 netmask 255.255.255.0echo "10.1.1.20 52:54:00:B8:27:75" > /etc/ethers-
arp -f /etc/ethersovs-vsctl show
66f0d773-a7c9-451e-980b-c2def85eda23 Bridge “br2” Port “br2” Interface “br2” type: internal Port “lisp0” Interface “lisp0” type: lisp options: {remote_ip=”192.168.1.249”} Port “vnet0” Interface “vnet0” Bridge “br1” Port “eth0” Interface “eth0” Port “br1” Interface “br1” type: internal
ovs-ofctl show br2
OFPT_FEATURES_REPLY (xid=0x2): dpid:00001e2e0e0cf040 n_tables:254, n_buffers:256 capabilities: FLOW_STATS TABLE_STATS PORT_STATS QUEUE_STATS ARP_MATCH_IP actions: OUTPUT SET_VLAN_VID SET_VLAN_PCP STRIP_VLAN SET_DL_SRC SET_DL_DST SET_NW_SRC SET_NW_DST SET_NW_TOS SET_TP_SRC SET_T P_DST ENQUEUE 1(vnet0): addr:fe:54:00:1b:ea:d5 config: 0 state: 0 current: 10MB-FD COPPER speed: 10 Mbps now, 0 Mbps max 2(lisp0): addr:96:fa:62:5b:6f:09 config: 0 state: 0 speed: 0 Mbps now, 0 Mbps max LOCAL(br2): addr:1e:2e:0e:0c:f0:40 config: 0 state: 0 speed: 0 Mbps now, 0 Mbps max OFPT_GET_CONFIG_REPLY (xid=0x4): frags=normal miss_send_len=0
ovs-ofctl dump-ports br2
OFPST_PORT reply (xid=0x2): 3 ports port 1: rx pkts=657, bytes=60526, drop=0, errs=0, frame=0, over=0, crc=0 tx pkts=401, bytes=39094, drop=0, errs=0, coll=0 port 2: rx pkts=617, bytes=60466, drop=0, errs=0, frame=0, over=0, crc=0 tx pkts=593, bytes=54754, drop=0, errs=0, coll=0 port LOCAL: rx pkts=11, bytes=790, drop=0, errs=0, frame=0, over=0, crc=0 tx pkts=294, bytes=24952, drop=0, errs=0, coll=0
ovs-ofctl dump-flows br2
NXST_FLOW reply (xid=0x4): cookie=0x0, duration=246.526s, table=0, n_packets=38, n_bytes=3724, idle_age=170, priority=3,dl_dst=02:00:00:00:00:00 actio ns=mod_dl_dst:52:54:00:1b:ea:d5,output:1 cookie=0x0, duration=293.084s, table=0, n_packets=98, n_bytes=9604, idle_age=234, priority=0 actions=NORMAL cookie=0x0, duration=194.739s, table=0, n_packets=23, n_bytes=2254, idle_age=170, priority=1,ip,in_port=1,vlan_tci=0x0000,n w_src=10.1.1.0/24 actions=output:2 cookie=0x0, duration=285.264s, table=0, n_packets=0, n_bytes=0, idle_age=285, priority=2,arp,in_port=1 actions=NORMAL
Test
ping test:
# ping 10.1.1.30
PING 10.1.1.30 (10.1.1.30) 56(84) bytes of data.
64 bytes from 10.1.1.30: icmp_seq=1 ttl=64 time=3.51 ms
64 bytes from 10.1.1.30: icmp_seq=2 ttl=64 time=1.21 ms
64 bytes from 10.1.1.30: icmp_seq=3 ttl=64 time=1.62 ms
64 bytes from 10.1.1.30: icmp_seq=4 ttl=64 time=1.80 ms
64 bytes from 10.1.1.30: icmp_seq=5 ttl=64 time=1.33 ms
64 bytes from 10.1.1.30: icmp_seq=6 ttl=64 time=1.49 ms
64 bytes from 10.1.1.30: icmp_seq=7 ttl=64 time=1.66 ms
Capture the packets on VM2 at the same time:
# tcpdump -i eth5 -xxx
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth5, link-type EN10MB (Ethernet), capture size 65535 bytes
03:01:22.900663 IP 10.1.1.20 > 10.1.1.30: ICMP echo request, id 59656, seq 1, length 64
0x0000: 5254 001b ead5 0200 0000 0000 0800 4500
0x0010: 0054 0000 4000 4001 2476 0a01 0114 0a01
0x0020: 011e 0800 cb2f e908 0001 533d 7f52 0000
0x0030: 0000 ae63 0400 0000 0000 1011 1213 1415
0x0040: 1617 1819 1a1b 1c1d 1e1f 2021 2223 2425
0x0050: 2627 2829 2a2b 2c2d 2e2f 3031 3233 3435
0x0060: 3637
03:01:22.900735 IP 10.1.1.30 > 10.1.1.20: ICMP echo reply, id 59656, seq 1, length 64
0x0000: 5254 00b8 2775 5254 001b ead5 0800 4500
0x0010: 0054 fff3 0000 4001 6482 0a01 011e 0a01
0x0020: 0114 0000 d32f e908 0001 533d 7f52 0000
0x0030: 0000 ae63 0400 0000 0000 1011 1213 1415
0x0040: 1617 1819 1a1b 1c1d 1e1f 2021 2223 2425
0x0050: 2627 2829 2a2b 2c2d 2e2f 3031 3233 3435
0x0060: 3637
ftrace debug(send):
cd /sys/kernel/debug/tracingecho "iptunnel_xmit" > set_ftrace_filterecho "function" > current_tracer-
echo "1" > tracing_on# cat trace # tracer: function # # entries-in-buffer/entries-written: 6/6 #P:4 # # _-----=> irqs-off # / _----=> need-resched # | / _---=> hardirq/softirq # || / _--=> preempt-depth # ||| / delay # TASK-PID CPU# |||| TIMESTAMP FUNCTION # | | | |||| | | upcall_6-2529 001 ..s. 78269.070472: iptunnel_xmit -lisp_send vhost-31615-31617 003 ..s. 78270.070891: iptunnel_xmit -lisp_send vhost-31615-31617 000 ..s. 78271.072337: iptunnel_xmit -lisp_send vhost-31615-31617 000 ..s. 78272.073472: iptunnel_xmit -lisp_send vhost-31615-31617 000 ..s. 78273.075184: iptunnel_xmit -lisp_send vhost-31615-31617 002 ..s. 78274.076124: iptunnel_xmit -lisp_send
ftrace debug(reveive):
cd /sys/kernel/debug/tracingecho "ovs_vport_receive" > set_ftrace_filterecho "function" > current_tracer-
echo "1" > tracing_on# cat trace | grep lisp_rcv upcall_5-2530 003 ..s1 78668.265341: ovs_vport_receive -lisp_rcv <idle>-0 002 ..s. 78669.266634: ovs_vport_receive -lisp_rcv <idle>-0 002 ..s. 78670.268925: ovs_vport_receive -lisp_rcv <idle>-0 002 ..s. 78671.269857: ovs_vport_receive -lisp_rcv <idle>-0 002 ..s. 78672.271818: ovs_vport_receive -lisp_rcv <idle>-0 002 ..s. 78673.273648: ovs_vport_receive -lisp_rcv <idle>-0 002 ..s. 78674.275753: ovs_vport_receive -lisp_rcv <idle>-0 002 ..s. 78675.277631: ovs_vport_receive -lisp_rcv Xorg-743 002 ..s. 78676.279053: ovs_vport_receive -lisp_rcv <idle>-0 002 ..s. 78677.281010: ovs_vport_receive -lisp_rcv <idle>-0 002 ..s. 78678.282785: ovs_vport_receive -lisp_rcv <idle>-0 002 ..s. 78679.284470: ovs_vport_receive -lisp_rcv <idle>-0 002 ..s. 78680.285205: ovs_vport_receive -lisp_rcv
All done.
OVS GRE Tunnel Configuration
Install
-
git clone git://git.openvswitch.org/openvswitch -
cd openvswitch -
./boot.sh -
./configure --with-linux=/lib/modules/${uname -r}/build -
make -
make install -
make modules_install -
modprobe openvswitch -
mkdir -p /usr/local/etc/openvswitch -
ovsdb-tool create /usr/local/etc/openvswitch/conf.db vswitchd/vswitch.ovsschema
Startup
-
ovsdb-server –remote=punix:/usr/local/var/run/openvswitch/db.sock
–remote=db:Open_vSwitch,Open_vSwitch,manager_options
–private-key=db:Open_vSwitch,SSL,private_key
–certificate=db:Open_vSwitch,SSL,certificate
–bootstrap-ca-cert=db:Open_vSwitch,SSL,ca_cert
–pidfile –detach -
ovs-vsctl --no-wait init -
ovs-vswitchd --pidfile --detach
GRE tunnel Configuration
- Host1
ovs-vsctl add-br br1ovs-vsctl add-br br2ovs-vsctl add-port br1 em1ifconfig em1 0;dhclient br1ifconfig br2 10.1.1.1 netmask 255.255.255.0ovs-vsctl add-port br2 gre0 -- set interface gre0 type=gre options:remote_ip=192.168.1.252
- VM1
virsh dumpxml kvm1 > domain.xml- search the XML
<interface type='network'>section and change it to something like this(see below): virsh create domain.xmlifconfig eth3 up-
ifconfig eth3 10.1.1.20 netmask 255.255.255.0<interface type='bridge'> <mac address='52:54:00:b8:27:75'/> <source bridge='br2'/> <virtualport type='openvswitch'> </virtualport> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface>ovs-vsctl show
390982aa-7bf6-4dfd-84eb-76fe7654e73d Bridge “br2” Port “vnet0” Interface “vnet0” Port “br2” Interface “br2” type: internal Port “gre0” Interface “gre0” type: gre options: {remote_ip=”192.168.1.252”} Bridge “br1” Port “br1” Interface “br1” type: internal Port “em1” Interface “em1”
- Host2
ovs-vsctl add-br br1ovs-vsctl add-br br2ovs-vsctl add-port br1 eth0ifconfig em1 0;dhclient br1ifconfig br2 10.1.1.2 netmask 255.255.255.0ovs-vsctl add-port br2 gre0 -- set interface gre0 type=gre options:remote_ip=192.168.1.249
- VM2
- redid the configuration as VM1
ifconfig eth5 up-
ifconfig eth5 10.1.1.30 netmask 255.255.255.0ovs-vsctl show
66f0d773-a7c9-451e-980b-c2def85eda23 Bridge “br1” Port “eth0” Interface “eth0” Port “br1” Interface “br1” type: internal Bridge “br2” Port “gre0” Interface “gre0” type: gre options: {remote_ip=”192.168.1.249”} Port “br2” Interface “br2” type: internal Port “vnet0” Interface “vnet0”
Test
ping VM2 on VM1:
# ping 10.1.1.30
PING 10.1.1.30 (10.1.1.30) 56(84) bytes of data.
64 bytes from 10.1.1.30: icmp_seq=1 ttl=64 time=3.66 ms
64 bytes from 10.1.1.30: icmp_seq=2 ttl=64 time=1.82 ms
64 bytes from 10.1.1.30: icmp_seq=3 ttl=64 time=1.47 ms
64 bytes from 10.1.1.30: icmp_seq=4 ttl=64 time=1.64 ms
64 bytes from 10.1.1.30: icmp_seq=5 ttl=64 time=1.64 ms
capture the packets on VM2 at the same time:
# tcpdump -i eth5 -xxx
08:24:38.425182 IP 10.1.1.20 > 10.1.1.30: ICMP echo request, id 53255, seq 1, length 64
0x0000: 5254 001b ead5 5254 00b8 2775 0800 4500
0x0010: 0054 0000 4000 4001 2476 0a01 0114 0a01
0x0020: 011e 0800 263f d007 0001 96f1 7852 0000
0x0030: 0000 2aa1 0900 0000 0000 1011 1213 1415
0x0040: 1617 1819 1a1b 1c1d 1e1f 2021 2223 2425
0x0050: 2627 2829 2a2b 2c2d 2e2f 3031 3233 3435
0x0060: 3637
08:24:38.425262 IP 10.1.1.30 > 10.1.1.20: ICMP echo reply, id 53255, seq 1, length 64
0x0000: 5254 00b8 2775 5254 001b ead5 0800 4500
0x0010: 0054 8ef0 0000 4001 d585 0a01 011e 0a01
0x0020: 0114 0000 2e3f d007 0001 96f1 7852 0000
0x0030: 0000 2aa1 0900 0000 0000 1011 1213 1415
0x0040: 1617 1819 1a1b 1c1d 1e1f 2021 2223 2425
0x0050: 2627 2829 2a2b 2c2d 2e2f 3031 3233 3435
0x0060: 3637
08:24:39.426066 IP 10.1.1.20 > 10.1.1.30: ICMP echo request, id 53255, seq 2, length 64
0x0000: 5254 001b ead5 5254 00b8 2775 0800 4500
0x0010: 0054 0000 4000 4001 2476 0a01 0114 0a01
0x0020: 011e 0800 d835 d007 0002 97f1 7852 0000
0x0030: 0000 77a9 0900 0000 0000 1011 1213 1415
0x0040: 1617 1819 1a1b 1c1d 1e1f 2021 2223 2425
0x0050: 2627 2829 2a2b 2c2d 2e2f 3031 3233 3435
0x0060: 3637
08:24:39.426135 IP 10.1.1.30 > 10.1.1.20: ICMP echo reply, id 53255, seq 2, length 64
0x0000: 5254 00b8 2775 5254 001b ead5 0800 4500
0x0010: 0054 8ef1 0000 4001 d584 0a01 011e 0a01
0x0020: 0114 0000 e035 d007 0002 97f1 7852 0000
0x0030: 0000 77a9 0900 0000 0000 1011 1213 1415
0x0040: 1617 1819 1a1b 1c1d 1e1f 2021 2223 2425
0x0050: 2627 2829 2a2b 2c2d 2e2f 3031 3233 3435
0x0060: 3637
ftrace debug:
cd /sys/kernel/debug/tracingecho "iptunnel_xmit" > set_ftrace_filterecho "function_graph" > current_tracer-
echo "1" > tracing_on# cat trace # tracer: function_graph # # CPU DURATION FUNCTION CALLS # | | | | | | | 0) + 63.180 us | iptunnel_xmit [openvswitch](); 0) + 29.963 us | iptunnel_xmit [openvswitch](); 1) + 51.486 us | iptunnel_xmit [openvswitch](); 2) + 49.981 us | iptunnel_xmit [openvswitch](); ------------------------------------------ 0) upcall_-1891 => vhost-2-2339 ------------------------------------------ 0) + 11.770 us | iptunnel_xmit [openvswitch](); 2) + 45.533 us | iptunnel_xmit [openvswitch](); 2) + 48.497 us | iptunnel_xmit [openvswitch](); 2) + 48.216 us | iptunnel_xmit [openvswitch](); 2) + 48.348 us | iptunnel_xmit [openvswitch]();
Gre Tunnel 就介绍到这里，之后会简单的介绍下 LISP Tunnel 的配置过程