2014 年 6月随笔档案 - popsuper1982

[转] How to create Windows OpenStack images

摘要：http://www.cloudbase.it/create-windows-openstack-images/We get regularly a lot of requests about how to generate Windows OpenStack images, especially ... 阅读全文

posted @ 2014-06-30 11:55 popsuper1982 阅读(693) 评论(0) 推荐(0) 编辑

Snapshot Types

摘要：Volume managersSome Unix systems have snapshot-capable logical volume managers. These implement copy-on-write on entire block devices by copying chang... 阅读全文

posted @ 2014-06-30 11:14 popsuper1982 阅读(465) 评论(0) 推荐(1) 编辑

[转] virt-builder, to trivially create various Linux distribution guest images

摘要：http://kashyapc.com/2014/01/27/virt-builder-to-trivially-create-various-linux-distribution-guest-images/I frequently use virt-builder (part of libgues... 阅读全文

posted @ 2014-06-30 09:46 popsuper1982 阅读(310) 评论(0) 推荐(0) 编辑

[转] Snapshotting with libvirt for qcow2 images

摘要：http://kashyapc.com/2011/10/04/snapshotting-with-libvirt-for-qcow2-images/ Libvirt 0.9.6 was recently out. Take a look at 0.9.5 changelog for truckload of features/bugfixes/cleanups(specifically snaps... 阅读全文

posted @ 2014-06-30 09:43 popsuper1982 阅读(761) 评论(0) 推荐(0) 编辑

[转] External(and Live) snapshots with libvirt

摘要：http://kashyapc.com/ Raw image is a blob of data exposed directly in VM as block device, it can't snapshot. qemu-img is able to import data from raw image into qcow2 image, and save it as snapshot Pr... 阅读全文

posted @ 2014-06-30 09:41 popsuper1982 阅读(899) 评论(0) 推荐(0) 编辑

[转] The QCOW2 Image Format

摘要：The QCOW2 Image Formathttps://people.gnome.org/~markmc/qcow-image-format.htmlThe QCOW image format is one of the disk image formats supported by the Q... 阅读全文

posted @ 2014-06-30 00:11 popsuper1982 阅读(1094) 评论(0) 推荐(0) 编辑

[转] KVM Internals, code and more

摘要：KVM Kernel-based Virtual Machine Internals, code and more http://slides.com/braoru/kvm#/ What behind KVM QEMU and KVM architecture overview KVM internals Very small Introduction to Libvirt KVM in 5 s... 阅读全文

posted @ 2014-06-29 18:46 popsuper1982 阅读(3918) 评论(0) 推荐(0) 编辑

[转] KVM虚拟化技术生态环境介绍

摘要：KVM虚拟化技术生态环境介绍 http://xanpeng.github.io/wiki/virt/kvm-virtulization-echosystem-intro.html kvm和qemu/qemu-kvm的关系 qemu vs. qemu-kvm: 从qemu 1.3开始，kvm userspace code就维护在qemu mainline中(git clone https://gi... 阅读全文

posted @ 2014-06-29 17:58 popsuper1982 阅读(1456) 评论(0) 推荐(1) 编辑

[转] Kvm Qemu Libvirt

摘要：如需转载，请标明原文出处以及作者陈锐 Rui Chen @kiwik2014/5/4 17:53:39写在最前面：这段时间一直在墨西哥出差，其中遇到了各种糟心的事儿，关注我微博的同学可能都知道，但是要说的是，也有一些收获，一个就是终于在30岁的时候在墨西哥找到了一点点学英语的小窍门；另一个就是这段时... 阅读全文

posted @ 2014-06-29 17:46 popsuper1982 阅读(721) 评论(0) 推荐(0) 编辑

[转] KVM scalability and consolidation ratio: cache none vs cache writeback

摘要：http://www.ilsistemista.net/index.php/virtualization/43-kvm-scalability-and-consolidation-ratio-cache-none-vs-cache-writeback.html?limitstart=0 In the latest ten years, full-virtualization technologie... 阅读全文

posted @ 2014-06-29 10:23 popsuper1982 阅读(661) 评论(0) 推荐(0) 编辑

[转] KVM VirtIO paravirtualized drivers: why they matter

摘要：http://www.ilsistemista.net/index.php/virtualization/42-kvm-virtio-paravirtualized-drivers-why-they-matter.html?limitstart=0 As you probably already know, there are basically two different schools in ... 阅读全文

posted @ 2014-06-29 10:18 popsuper1982 阅读(1077) 评论(0) 推荐(0) 编辑

[转] Write Barriers

摘要：RHEL6 学习：Write Barriershttp://francs3.blog.163.com/blog/static/405767272012215212890/ Write Barriers 是一种内核机制，可以保证文件系统元数据正确有序地写入持久化存储，哪怕持久化存储掉电的情况也能保证。... 阅读全文

posted @ 2014-06-29 10:14 popsuper1982 阅读(1025) 评论(1) 推荐(0) 编辑

[转] Barriers, Caches, Filesystems

摘要：Barriers, Caches, Filesystemshttp://monolight.cc/2011/06/barriers-caches-filesystems/With the recent proliferation of ext4 as the new “default” Linux ... 阅读全文

posted @ 2014-06-29 10:12 popsuper1982 阅读(730) 评论(0) 推荐(0) 编辑

[转] Barriers and journaling filesystems

摘要：http://lwn.net/Articles/283161/Journaling filesystems come with a big promise: they free system administrators from the need to worry about disk corru... 阅读全文

posted @ 2014-06-29 10:10 popsuper1982 阅读(390) 评论(0) 推荐(0) 编辑

[转] KVM storage performance and cache settings on Red Hat Enterprise Linux 6.2

摘要：Almost one year ago, I checked how different cache settings affected KVM storage subsystem performance. Results were very clear: to obtain good I/O speed, you had to use the write-back or none cache p... 阅读全文

posted @ 2014-06-29 10:00 popsuper1982 阅读(1226) 评论(0) 推荐(0) 编辑

[转] Vmware vs Virtualbox vs KVM vs XEN: virtual machines performance comparison

摘要：http://www.ilsistemista.net/index.php/virtualization/1-virtual-machines-performance-comparison.html?limitstart=0 Today, “Virtual machine” seems to be a magic words in the computer industry. Why? Simpl... 阅读全文

posted @ 2014-06-29 08:41 popsuper1982 阅读(4072) 评论(0) 推荐(0) 编辑

[转] KVM I/O slowness on RHEL 6

摘要：KVM I/O slowness on RHEL 6 http://www.ilsistemista.net/index.php/virtualization/11-kvm-io-slowness-on-rhel-6.html?limitstart=0 Over one year has passed since my last virtual machine hypervisor compari... 阅读全文

posted @ 2014-06-28 12:48 popsuper1982 阅读(566) 评论(0) 推荐(0) 编辑

QEMU KVM libvirt 手册(3) - Storage Media

摘要：访问Hard Drive 使用-hda –hdb qemu-system-x86_64 -enable-kvm -name ubuntutest -m 2048 -hda ubuntutest.img -hdb ubuntutest1.img -boot c -vnc :19 -net nic,model=virtio -net tap,ifname=tap0,script=no,downscri... 阅读全文

posted @ 2014-06-28 12:29 popsuper1982 阅读(2771) 评论(0) 推荐(0) 编辑

QEMU KVM libvirt手册(2): monitor

摘要：Administrating Virtual Machines with QEMU MonitorWhen QEMU is running, a monitor console is provided for performing interaction with the user. Using t... 阅读全文

posted @ 2014-06-27 20:15 popsuper1982 阅读(3062) 评论(0) 推荐(0) 编辑

QEMU KVM libvirt 手册(1): 安装

摘要：安装对虚拟化的支持通常在BIOS中是禁掉的，必须开启才可以。对于Intel CPU，我们可以通过下面的命令查看是否支持虚拟化。# grep "vmx" /proc/cpuinfo flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge... 阅读全文

posted @ 2014-06-27 19:12 popsuper1982 阅读(2188) 评论(0) 推荐(1) 编辑

QEMU Networking

摘要：QEMU Networking QEMU has a number of really nice ways to set up networking for its guests. It can be a little bewildering to figure out how each of the options work, so I thought I'd write up what I f... 阅读全文

posted @ 2014-06-27 17:39 popsuper1982 阅读(1210) 评论(0) 推荐(0) 编辑

Openvswitch手册(9): Flow

摘要：这一节我们将flow tableflow table主要由ovs-ofctl命令操作ovs-ofctl可以走和openflow controller一样的协议：ssl:ip[:port]: The specified SSL port (default: 6633) on the host at t... 阅读全文

posted @ 2014-06-26 16:04 popsuper1982 阅读(8771) 评论(0) 推荐(0) 编辑

Openvswitch手册(8): ovs-vsctl的DB的操作

摘要：ovs-vsctl的DB的操作如果你在命令行里面找不到相应的命令创建和删除对象，则可以直接删除数据库[−−if−exists] [−−columns=column[,column]...] list table [record]...$ sudo ovs-vsctl list bridge _uui... 阅读全文

posted @ 2014-06-23 22:23 popsuper1982 阅读(4973) 评论(1) 推荐(1) 编辑

Openvswitch手册(7): Interfaces

摘要：我们来看Interfacesofport: OpenFlow port number for this interface.type:system: An ordinary network device, e.g. eth0 on Linux.internal: A simulated networ... 阅读全文

posted @ 2014-06-23 22:11 popsuper1982 阅读(2315) 评论(0) 推荐(1) 编辑

Openvswitch手册(6): QoS

摘要：这一节我们看QoS，Qos的设置往往是和flow中的policy一起使用的Open vSwitch QoS capabilities1 Interface rate limiting2 Port QoS policyQoS: Interface rate limitingA rate and bur... 阅读全文

posted @ 2014-06-23 12:46 popsuper1982 阅读(7104) 评论(1) 推荐(0) 编辑

[转]linux VLAN配置(vconfig)

摘要：1.安装vlan(vconfig)和加载8021q模块 #aptitude install vlan #modprobe 8021q 2.使用linux vconfig命令配置vlan #vconfig add eth0 100 #vconfig add eth0 200 在eth0接口上配置两个VLAN #vconfig set_flag eth0.100 1 1... 阅读全文

posted @ 2014-06-23 11:36 popsuper1982 阅读(2441) 评论(0) 推荐(0) 编辑

[转] IPTables for KVM Host

摘要：IPTables for KVM HostJanuary 26, 2012By Andrew GaldesUse the following IPTables rules “/etc/sysconfig/iptables” on a Redhat/CentOS system where this s... 阅读全文

posted @ 2014-06-23 09:19 popsuper1982 阅读(736) 评论(0) 推荐(0) 编辑

[转] Firewall and network filtering in libvirt

摘要：Firewall and network filtering in libvirtThere are three pieces of libvirt functionality which do network filtering of some type. At a high level they... 阅读全文

posted @ 2014-06-23 09:15 popsuper1982 阅读(696) 评论(0) 推荐(0) 编辑

[转] XEN, KVM, Libvirt and IPTables

摘要：http://cooker.techsnail.com/index.php/XEN,_KVM,_Libvirt_and_IPTablesXEN, KVM, Libvirt and IPTablesAlternate Title: "Libvirt overwrites the existing ip... 阅读全文

posted @ 2014-06-23 09:14 popsuper1982 阅读(1354) 评论(0) 推荐(0) 编辑

[转]Understand QoS at OpenSwitch

摘要：danny http://dannykim.me/danny/57771 2014.02.11 14:34:58 (*.193.128.184) 592 >>> Purpose This document helps us understand how QoS works in OpenVSwitch. This document can be used as a ... 阅读全文

posted @ 2014-06-21 09:50 popsuper1982 阅读(907) 评论(0) 推荐(0) 编辑

Openvswitch手册(5): VLAN and Bonding

摘要：我们这一节来看Port一般来说一个Port就是一个Interface，当然也有一个Port对应多个Interface的情况，成为BondVLAN ConfigurationPort的一个重要的方面就是VLAN Configuration，有两种模式：trunk port，这个port不配置tag，配... 阅读全文

posted @ 2014-06-21 09:49 popsuper1982 阅读(10417) 评论(3) 推荐(0) 编辑

[转]Link Aggregation and LACP with Open vSwitch

摘要：http://blog.scottlowe.org/2012/10/19/link-aggregation-and-lacp-with-open-vswitch/In this post, I’m going to show you how to use link aggregation (via ... 阅读全文

posted @ 2014-06-21 09:48 popsuper1982 阅读(588) 评论(0) 推荐(0) 编辑

[转]Part4 – OPENVSWITCH – Playing with Bonding on Openvswitch

摘要：Bonding is aggregation multiple links to single link in order to increase throughput and achieve redundancy in case one of links fails. At least, offi... 阅读全文

posted @ 2014-06-21 09:47 popsuper1982 阅读(961) 评论(0) 推荐(0) 编辑

[转]Part3 – OPENVSWICH – Campus Model with Layer2 Access built with Open-Source Applications

摘要：In part one we showed how to create Openvswitch extension and submit it to Microcore repository. There were also presented after-install steps for Ope... 阅读全文

posted @ 2014-06-21 09:45 popsuper1982 阅读(532) 评论(0) 推荐(0) 编辑

[转]Part2 – OPENVSWICH – VLANs, Trunks, L3 VLAN interface, InterVLAN Routing – Configuration And Testing

摘要：In a previous tutorial we showed how to install Openvswitch on Qemu image with Microcore Linux. At the end of tutorial we created Openvswitch extensio... 阅读全文

posted @ 2014-06-21 09:44 popsuper1982 阅读(722) 评论(0) 推荐(0) 编辑

[转]Part1 – OPENVSWICH – Creating and Submitting Openvswitch Extension To Tinycore Upstream

摘要：In May 2011, I read a request for installation Openvswitch on Qemu image. I started to play with Openvswitch and finally became fan of this project. I... 阅读全文

posted @ 2014-06-21 09:37 popsuper1982 阅读(762) 评论(0) 推荐(0) 编辑

[转]LACP学习笔记

摘要：http://www.jdccie.com/net-tec/lacp%E5%AD%A6%E4%B9%A0%E7%AC%94%E8%AE%B0/一、LACP简介1、LACP协议简介基于 IEEE802.3ad 标准的LACP（Link Aggregation Control Protocol，链路汇聚... 阅读全文

posted @ 2014-06-21 09:36 popsuper1982 阅读(667) 评论(0) 推荐(0) 编辑

[转]Linux操作系统tcpdump抓包分析详解

摘要：PS：tcpdump是一个用于截取网络分组，并输出分组内容的工具，简单说就是数据包抓包工具。tcpdump凭借强大的功能和灵活的截取策略，使其成为Linux系统下用于网络分析和问题排查的首选工具。tcpdump提供了源代码，公开了接口，因此具备很强的可扩展性，对于网络维护和入侵者都是非常有用的工具。... 阅读全文

posted @ 2014-06-21 09:31 popsuper1982 阅读(5931) 评论(1) 推荐(0) 编辑

Openvswitch手册(4): Mirror

摘要：这一节我们来分析MirrorMirror就是配置一个bridge，将某些包发给指定的mirrored ports对于包的选择：select_all，所有的包select_dst_portselect_src_portselect_vlan对于指定的目的：output_port (SPAN)outpu... 阅读全文

posted @ 2014-06-21 09:31 popsuper1982 阅读(4517) 评论(0) 推荐(0) 编辑

Openvswitch手册(3): sFlow, netFlow

摘要：这一节，我们重点看sFlow采样流sFlow（Sampled Flow）是一种基于报文采样的网络流量监控技术，主要用于对网络流量进行统计分析。sFlow系统包含一个嵌入在设备中的sFlow Agent和远端的sFlow Collector。其中，sFlow Agent通过sFlow采样获取本设备上的... 阅读全文

posted @ 2014-06-21 09:29 popsuper1982 阅读(4810) 评论(1) 推荐(3) 编辑

[转]Comparing sFlow and NetFlow in a vSwitch

摘要：As virtualization shifts the network edge from top of rack switches to software virtual switches running on the hypervisors; visibility in the virtual switching layer is essential in order to provi... 阅读全文

posted @ 2014-06-21 09:28 popsuper1982 阅读(1706) 评论(0) 推荐(1) 编辑

[转]Rapidly detecting large flows, sFlow vs. NetFlow/IPFIX

摘要：Figure 1: Low latency software defined networking control loop The articles SDN and delay and Delay and stability describe the critical importance of low measurement delay in constructing stable ... 阅读全文

posted @ 2014-06-21 09:27 popsuper1982 阅读(1342) 评论(0) 推荐(1) 编辑

[转]Network flow monitoring with Open vSwitch

摘要：With network virtualization, the software switches (such as Open vSwitch) on the servers act like the edge switches. So, to gain insights into the net... 阅读全文

posted @ 2014-06-21 09:25 popsuper1982 阅读(820) 评论(0) 推荐(0) 编辑

[转]Configuring Open vSwitch

摘要：(image from Anatomy of an open source cloud)A cloud data center consists of large numbers of physical servers, each running a hypervisor with one or m... 阅读全文

posted @ 2014-06-21 09:24 popsuper1982 阅读(638) 评论(0) 推荐(0) 编辑

Openvswitch手册(2): OpenFlow Controller

摘要：我们这一节主要来看ControllerController有两种:Primary Controller: 真正控制vswitch的flow table，vswitch会保持和controller的连接，如果失败，取决于bridge的fail mode。一个vswitch可以连接多个Controll... 阅读全文

posted @ 2014-06-21 09:23 popsuper1982 阅读(3692) 评论(1) 推荐(0) 编辑

Openvswitch手册(1): 架构，SSL, Manager, Bridge

摘要：Openvswitch是一个virutal swtich，支持Open Flow协议，当然也有一些硬件Switch也支持Open Flow协议，他们都可以被统一的Controller管理，从而实现物理机和虚拟机的网络联通。Open Switch定义了一系列Flow Table，通过它来控制包的流向... 阅读全文

posted @ 2014-06-21 09:22 popsuper1982 阅读(9134) 评论(2) 推荐(4) 编辑

[转] SSL/TLS Strong Encryption: An Introduction

摘要：As an introduction this chapter is aimed at readers who are familiar with the Web, HTTP, and Apache, but are not security experts. It is not intended ... 阅读全文

posted @ 2014-06-21 09:21 popsuper1982 阅读(345) 评论(0) 推荐(0) 编辑

[转] An Introduction to Mutual SSL Authentication

摘要：1. Introduction Mutual SSL authentication or certificate based mutual authentication refers to two parties authenticating each other through verifying the provided digital certificate so that both pa... 阅读全文

posted @ 2014-06-21 09:20 popsuper1982 阅读(972) 评论(0) 推荐(0) 编辑

[转]SSL on Open vSwitch and ovs controller

摘要：There are two places that SSL will need to be configured if SSL is to be used between the controller and the Open vSwtich. The instructions below assu... 阅读全文

posted @ 2014-06-21 09:19 popsuper1982 阅读(621) 评论(0) 推荐(0) 编辑

[转]Open vSwitch with SSL and Mininet

摘要：Open vSwitch with SSL and MininetBy default, Mininet uses the unencrypted port in Open vSwitch for OpenFlow. This makes total sense since the purpose ... 阅读全文

posted @ 2014-06-21 09:18 popsuper1982 阅读(410) 评论(0) 推荐(0) 编辑

[转]深入理解 VXLAN

摘要：VXLAN 是非常新的一个 tunnel 技术，它是一个 L2 tunnel。Linux 内核的 upstream 中也刚刚加入 VXLAN 的实现。相比 GRE tunnel 它有着很的扩展性，同时解决了很多其它问题。一，GRE tunnel 的不足网络很多介绍 VXLAN 的文章都没有直接告诉你... 阅读全文

posted @ 2014-06-21 09:17 popsuper1982 阅读(1258) 评论(0) 推荐(0) 编辑

[转]深入理解 GRE tunnel

摘要：我以前写过一篇介绍 tunnel 的文章，只是做了大体的介绍。里面多数 tunnel 是很容易理解的，因为它们多是一对一的，换句话说，是直接从一端到另一端。比如 IPv6 over IPv4 的 tunnel，也就是 SIT，它的原理如下图所示：显然，除了端点的 host A 和 host B之外，中间经过的任何设备都是看不到里面的 IPv6 的头，对于它们来说，经过 sit 发出的包... 阅读全文

posted @ 2014-06-21 09:16 popsuper1982 阅读(1200) 评论(0) 推荐(0) 编辑

[转]rp_filter 的一个例子

摘要：我们都知道 Linux 反向路由查询，它的原理很简单，检查流入本机的 IP 地址是否合法，是否可能路由进来，是否是最佳路由。但是像多数网络问题，理论很简单，代码你看了也能懂，可实际情况往往比较复杂。之前一直没有碰到过实际中的例子，最近总算碰到一个。情况是这样的，我有两个 vlan 设备，eth0.7... 阅读全文

posted @ 2014-06-21 09:15 popsuper1982 阅读(3086) 评论(0) 推荐(0) 编辑

[转]An overview of Openvswitch implementation

摘要：This is NOT a tutorial on how to use openvswitch, this is for developers who want to know the implementation details of openvswitch project, thus, I a... 阅读全文

posted @ 2014-06-21 09:14 popsuper1982 阅读(724) 评论(2) 推荐(0) 编辑

OpenFlow学习笔记

摘要：Software-Defined Networking Network intelligence is (logically) centralized in software-based SDN controllers network operators and administrators can programmatically configure this simplified ... 阅读全文

posted @ 2014-06-21 09:13 popsuper1982 阅读(2993) 评论(0) 推荐(1) 编辑

如何让 Git 使用 HTTP 代理服务器

摘要：因为我们的内部网络使用了代理，所以在安装 OpenStack 基于 Web 的管理控制台的时候有个小麻烦，我们的 http 代理服务器无法通过 git 协议下载 openstack-dashboard 所需的代码，也就是说可以 git clone https:// 这样克隆代码，但是不能使用 git 协议 git clone git://。糟糕的是在 openstack-dashboard/t... 阅读全文

posted @ 2014-06-21 09:12 popsuper1982 阅读(1248) 评论(0) 推荐(0) 编辑

[转]SDN与OpenFlow技术简介

摘要：http://blog.163.com/s_zhchluo/blog/static/15014708201411144727961/ 本文是2012年文章，对Openflow的发展、规范、应用和SDN的提出及相关应用做出较为客观全面的介绍。笔者希望通过本文对OpenFlow/SDN做一个初步介绍，以期帮助大家能够进一步深入了解和学习OpenFlow/SDN。序言：从网络虚拟化说起云计... 阅读全文

posted @ 2014-06-21 09:11 popsuper1982 阅读(977) 评论(0) 推荐(0) 编辑

[转]Openflow Lab

摘要：GETTING STARTED OPENFLOW OPENVSWITCH TUTORIAL LAB : SETUPFor a more up to date tutorial as anything more then 6 months old is outdated in the world of... 阅读全文

posted @ 2014-06-21 09:09 popsuper1982 阅读(721) 评论(0) 推荐(0) 编辑

[转]OpenContrail 体系架构文档

摘要：OpenContrail 体系架构文档英文原文：http://opencontrail.org/opencontrail-architecture-documentation/ 翻译者：@KkBLuE知行合一其微信号：kkbluepublic， SDNAP.com翻译整理 OpenContrail 体系架构文档 1 概述 1.1 使用案例 1.2 OpenCon... 阅读全文

posted @ 2014-06-21 09:08 popsuper1982 阅读(959) 评论(0) 推荐(0) 编辑

[转]Examining Open vSwitch Traffic Patterns

摘要：In this post, I want to provide some additional insight on how the use of Open vSwitch (OVS) affects—or doesn’t affect, in some cases—how a Linux host directs traffic through physical interfaces, OVS ... 阅读全文

posted @ 2014-06-21 09:07 popsuper1982 阅读(637) 评论(0) 推荐(0) 编辑

tcpdump

摘要：一篇tcpdump文章的翻译分类： tcp/ip 2011-02-26 13:26 1064人阅读评论(0) 收藏举报 tcpdst网络工具securityfilter tcpdump是信息安全行业最好的网络分析工具，希望全面理解tcp/ip的人必须要很好的掌握它。很多人喜欢用更高... 阅读全文

posted @ 2014-06-21 09:06 popsuper1982 阅读(1798) 评论(0) 推荐(0) 编辑

[转]Running KVM and Openvswitch on Ubuntu 12.10

摘要：Running KVM and Openvswitch on Ubuntu 12.10I’ve got an aging VMWare ESXi 4.0 server that needs to be replaced with something a little more modern and ... 阅读全文

posted @ 2014-06-21 09:05 popsuper1982 阅读(603) 评论(0) 推荐(1) 编辑

[转]Ubuntu Precise - Install youtube-dl package using Quantal repo

摘要：Ubuntu Precise - Install youtube-dl package using Quantal repo Ubuntu Precise 12.04 currently contains in repository youtube-dl version 2012.02.27-1. As of recent YouTube changes this package versio... 阅读全文

posted @ 2014-06-21 09:05 popsuper1982 阅读(465) 评论(0) 推荐(0) 编辑

[转]Creating an IP Tunnel using GRE on Linux

摘要：Creating an IP Tunnel using GRE on LinuxContents[hide]· 1 IP Tunelling· 2 Starting Configuration· 3 Tunnelling Objectiveo 3.1 Create Tunnelso 3.2 Addi... 阅读全文

posted @ 2014-06-21 09:04 popsuper1982 阅读(950) 评论(0) 推荐(0) 编辑

[转]两台linux建立GRE隧道

摘要：原创作品，允许转载，转载时请务必以超链接形式标明文章原始出处、作者信息和本声明。否则将追究法律责任。http://333234.blog.51cto.com/323234/9318051.拓扑图：备注：因为应用原因，需要在linux2上添加一个公网地址，并且在中间路由设备不受控制的情况下，Li... 阅读全文

posted @ 2014-06-21 09:03 popsuper1982 阅读(1314) 评论(0) 推荐(0) 编辑

[转]深入理解GRE tunnel

摘要：Posted in Linux Kernel at November 8th, 2012 / 1 Comment »我以前写过一篇介绍 tunnel 的文章，只是做了大体的介绍。里面多数 tunnel 是很容易理解的，因为它们多是一对一的，换句话说，是直接从一端到另一端。比如 IPv6 over I... 阅读全文

posted @ 2014-06-21 08:52 popsuper1982 阅读(1036) 评论(0) 推荐(0) 编辑

[转]在openvswitch上配置GRE tunnel

摘要：Posted in Linux Application at November 13th, 2012如果你是用 openvswitch 内置的 GRE tunnel，那么配置很简单，基本上就一条命令：ovs-vsctl add-port br0 gre0 -- set interface gre0 ... 阅读全文

posted @ 2014-06-21 08:51 popsuper1982 阅读(1028) 评论(0) 推荐(0) 编辑

[转] iptables

摘要：原创作品，允许转载，转载时请务必以超链接形式标明文章原始出处、作者信息和本声明。否则将追究法律责任。http://peaceweb.blog.51cto.com/3226037/923270 iptables（一）--初阶 1、TCP/IP三次握手客户端发起请求，SYN=1，ACK=0，产生个序列号，以100为例服务端确认客户端的请求，并且也想客户端请求，SYN=1，... 阅读全文

posted @ 2014-06-21 08:50 popsuper1982 阅读(1297) 评论(0) 推荐(0) 编辑

[转] List of OpenFlow Software Projects

摘要：List of OpenFlow Software Projects (that I know of) http://yuba.stanford.edu/~casado/of-sw.html (I am trying to keep a running list of all OpenFlow-related software projects where either the bits or... 阅读全文

posted @ 2014-06-21 08:17 popsuper1982 阅读(390) 评论(0) 推荐(0) 编辑

Openvswtich 学习笔记

摘要：场景：创建一个Virtual Switch,支持VLAN，支持MAC-Learning 包含下面四个Port： P1, truck port P2, VLAN 20 P3, P4 VLAN 30 包含五个flow table: Table 0: Admission control. Table 1: VLAN input processing. ... 阅读全文

posted @ 2014-06-21 08:16 popsuper1982 阅读(4623) 评论(0) 推荐(0) 编辑

[转]数字证书原理

摘要：http://blog.sina.com.cn/s/blog_44ee37cd01016r1h.html文中首先解释了加密解密的一些基础知识和概念，然后通过一个加密通信过程的例子说明了加密算法的作用，以及数字证书的出现所起的作用。接着对数字证书做一个详细的解释，并讨论一下windows中数字证书的管... 阅读全文

posted @ 2014-06-21 08:15 popsuper1982 阅读(306) 评论(0) 推荐(0) 编辑

HTB Linux queuing discipline manual - user guide笔记

摘要：1. Introduction HTB is meant as a more understandable, intuitive and faster replacement for the CBQ qdisc in Linux. Both CBQ and HTB help you to control the use of the outbound bandwidth on a... 阅读全文

posted @ 2014-06-21 08:14 popsuper1982 阅读(974) 评论(0) 推荐(0) 编辑

iproute2学习笔记

摘要：一、替代arp, ifconfig, route等命令显示网卡和IP地址 root@openstack:~# ip link list 1: lo: mtu 65536 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: eth0: mtu 15... 阅读全文

posted @ 2014-06-21 08:13 popsuper1982 阅读(5202) 评论(0) 推荐(0) 编辑

[转]基于 Open vSwitch 的 OpenFlow 实践

摘要：Open vSwitch 概述Open vSwitch（下面简称为 OVS）是由 Nicira Networks 主导的，运行在虚拟化平台（例如 KVM，Xen）上的虚拟交换机。在虚拟化平台上，OVS 可以为动态变化的端点提供 2 层交换功能，很好的控制虚拟网络中的访问策略、网络隔离、流量监控等等。... 阅读全文

posted @ 2014-06-21 07:48 popsuper1982 阅读(2760) 评论(0) 推荐(0) 编辑

Open vSwitch Advanced Features Tutorial

摘要：Open vSwitch Advanced Features Tutorial=======================================Many tutorials cover the basics of OpenFlow. This is not such atutorial... 阅读全文

posted @ 2014-06-21 07:45 popsuper1982 阅读(868) 评论(0) 推荐(0) 编辑

[转]Open vSwitch 安装及配置

摘要：Open vSwitch安装及配置一、 Open vSwitch简介1.1概述Open vSwitch是一个高质量的、多层虚拟交换机，使用开源Apache 2.0许可协议，由Nicira Networks开发，主要实现代码为可移植的C代码。它的目的是让大规模网络自动化可以通过编程扩展,同时仍然支持... 阅读全文

posted @ 2014-06-21 00:22 popsuper1982 阅读(6537) 评论(0) 推荐(1) 编辑

WSGI and Paste学习笔记

摘要：The ProblemLots of web frameworks Zope, Quixote, Webware, SkunkWeb and Twisted Web etcApplications written for one framework often weren't compatible ... 阅读全文

posted @ 2014-06-21 00:20 popsuper1982 阅读(2314) 评论(0) 推荐(0) 编辑

Icehouse 创建Instance代码分析

摘要：1. nova-api接收到request 在/etc/nova/api-paste.ini中，是这样配置nova v2的 [app:osapi_compute_app_v2] paste.app_factory = nova.api.openstack.compute:APIRouter.factory 在/usr/lib/python2.7/dist-packages/nova/a... 阅读全文

posted @ 2014-06-21 00:17 popsuper1982 阅读(935) 评论(0) 推荐(0) 编辑

[转]Request Flow for Provisioning Instance in Openstack

摘要：One of the most important use-case in any cloud is provisioning a VM . In this article we shall do a walk through about an instance(VM) being provisioned in a Openstack based cloud. This article ... 阅读全文

posted @ 2014-06-21 00:15 popsuper1982 阅读(4759) 评论(1) 推荐(0) 编辑

nova compute enable password injection and filesystem resize

摘要：root@OpenstackIcehouse2:~# cat /etc/nova/nova-compute.conf [DEFAULT] compute_driver=libvirt.LibvirtDriver [libvirt] virt_type=qemu libvirt_inject_partition=-1 inject_password=true ... 阅读全文

posted @ 2014-06-21 00:11 popsuper1982 阅读(609) 评论(0) 推荐(0) 编辑

RabbitMQ in Action(5): Clustering and dealing with failure

摘要：Batteries included: RabbitMQ clustering The clustering built in to RabbitMQ was designed with two goals in mind: allowing consumers and producers to keep running in the event one Rabbit node dies, an... 阅读全文

posted @ 2014-06-21 00:07 popsuper1982 阅读(2303) 评论(0) 推荐(0) 编辑

RabbitMQ in Action (2): Running and administering Rabbit

摘要：Server management the Erlang node and the Erlang application Starting nodes multiple Erlang applications can run inside the same node an application on node asparagus can call functions in applic... 阅读全文

posted @ 2014-06-21 00:06 popsuper1982 阅读(2660) 评论(0) 推荐(0) 编辑

Keystone v3 domains 应用场景

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posted @ 2014-06-21 00:01 popsuper1982 阅读(829) 评论(0) 推荐(0) 编辑

[转]Windows Images for OpenStack

摘要：This note summarizes articles from other places about Microsoft Windows images for OpenStack creation, along with some first hand experience. The whol... 阅读全文

posted @ 2014-06-21 00:00 popsuper1982 阅读(544) 评论(0) 推荐(0) 编辑

[转] Customizing OpenStack RBAC policies

摘要：http://www.florentflament.com/blog/customizing-openstack-rbac-policies.htmlOpenStack uses a role based access control (RBAC) mechanism to manage acces... 阅读全文

posted @ 2014-06-20 23:57 popsuper1982 阅读(1115) 评论(0) 推荐(0) 编辑

[转]Setting Keystone v3 domains

摘要：http://www.florentflament.com/blog/setting-keystone-v3-domains.html The Openstack Identity v3 API, provided by Keystone, offers features that were lacking in the previous version. Among these feature... 阅读全文

posted @ 2014-06-20 23:56 popsuper1982 阅读(1149) 评论(0) 推荐(0) 编辑

Openstack中RabbitMQ RPC代码分析

摘要：在Openstack中，RPC调用是通过RabbitMQ进行的。任何一个RPC调用，都有Client/Server两部分，分别在rpcapi.py和manager.py中实现。这里以nova-scheduler调用nova-compute为例子。 nova/compute/rpcapi.py中有ComputeAPI nova/compute/manager.py中有ComputeMan... 阅读全文

posted @ 2014-06-20 23:55 popsuper1982 阅读(3269) 评论(0) 推荐(0) 编辑

RabbitMQ in Action (1): Understanding messaging

摘要：1. Consumers and producers Producers create messages and publish (send) them to a broker server (RabbitMQ). A message has two parts: a payload and a label. The payload is the data you want to ... 阅读全文

posted @ 2014-06-20 22:41 popsuper1982 阅读(2359) 评论(0) 推荐(0) 编辑

[转]Understanding OpenStack Authentication: Keystone PKI

摘要：The latest stable release of OpenStack, codenamed Grizzly, revolutionizes the way user authentication works. You may have read some of the few articles available on this new authentication scheme. Thi... 阅读全文

posted @ 2014-06-20 22:40 popsuper1982 阅读(2663) 评论(0) 推荐(0) 编辑

[转]NOVA中的RabbitMQ解析

摘要：原博客地址：http://blog.csdn.net/gaoxingnengjisuanNOVA是OpenStack系统的核心模块，主要负责虚拟机实例的生命周期管理、网络管理（前几个版本）、存储卷管理（前几个版本）、用户管理以及其他相关云平台管理功能，在能力上类似于Amazon EC2和Racksp... 阅读全文

posted @ 2014-06-20 22:39 popsuper1982 阅读(1149) 评论(0) 推荐(0) 编辑

neutron的基本原理

摘要：neutron是openstack的一个重要模块，也是比较难以理解和debug的模块之一。我这里安装如图安装了经典的三个节点的Havana的Openstack 图1 分三个网络： External Network/API Network，这个网络是连接外网的，无论是用户调用Openstack的API，还是创建出来的虚拟机要访问外网，或者外网要ssh到虚拟机，都需要通过这个网络... 阅读全文

posted @ 2014-06-20 22:37 popsuper1982 阅读(7393) 评论(2) 推荐(4) 编辑

[转]Virtualization Basics

摘要：Virtualization Basics Virtualization is not a new concept, but its complexity has been growing, and a number of new paradigms are rising. I will try t... 阅读全文

posted @ 2014-06-20 22:36 popsuper1982 阅读(1067) 评论(0) 推荐(0) 编辑

虚拟化技术

摘要：由于采用技术的不同，系统虚拟化不仅仅包括全虚拟化、半虚拟化和硬件辅助虚拟化。完整来看，可以将系统虚拟化分为五大类：硬件仿真（Emulation）简介：属于Hosted模式，在物理机的操作系统上创建一个模拟硬件的程序（Hardware VM）来仿真所想要的硬件，并在此程序上跑虚拟机，而且虚拟机内部的客... 阅读全文

posted @ 2014-06-20 22:35 popsuper1982 阅读(1335) 评论(0) 推荐(0) 编辑

nova vnc proxy基本原理

摘要：先上图 VNC Proxy的功能：将公网(public network)和私网(private network)隔离 VNC client运行在公网上，VNCServer运行在私网上，VNC Proxy作为中间的桥梁将二者连接起来 VNC Proxy通过token对VNC Client进行验证 VNC Proxy不仅仅使得私网的访问更加安全，而且将具体的... 阅读全文

posted @ 2014-06-20 22:32 popsuper1982 阅读(11322) 评论(0) 推荐(0) 编辑

Notes for Linux Administration Handbook (1) : Booting and Shutting Down

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posted @ 2014-06-20 22:31 popsuper1982 阅读(484) 评论(0) 推荐(0) 编辑

刘超的通俗云计算

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