<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[围剿]]></title><description><![CDATA[当你知道你是你的时候，你不是你，当你不知道你是你的时候，你才是你]]></description><link>https://blog.youkuaiyun.com/onesafe</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; onesafe]]></copyright><item><title><![CDATA[openstack nova live-migration]]></title><link>https://blog.youkuaiyun.com/onesafe/article/details/51788256</link><guid>https://blog.youkuaiyun.com/onesafe/article/details/51788256</guid><author>onesafe</author><pubDate>Thu, 30 Jun 2016 10:41:17 +0800</pubDate><description><![CDATA[今天试了一把nova live-migration这个功能，感觉还挺好玩的，在这里分享一下配置的过程
我有两台虚拟机，一台叫host-1， 一台叫host-2
host-1主要运行devstack
host-2作为nova-compute节点运行nova-compute


第一步：配置共享存储
服务器端（host-1）：
sudo apt-get install nfs-kern]]></description><category></category></item><item><title><![CDATA[使用logstash+elasticsearch+kibana快速搭建日志平台]]></title><link>https://blog.youkuaiyun.com/onesafe/article/details/51776227</link><guid>https://blog.youkuaiyun.com/onesafe/article/details/51776227</guid><author>onesafe</author><pubDate>Tue, 28 Jun 2016 15:17:14 +0800</pubDate><description><![CDATA[日志的分析和监控在系统开发中占非常重要的地位，系统越复杂，日志的分析和监控就越重要，常见的需求有:

根据关键字查询日志详情监控系统的运行状况统计分析，比如接口的调用次数、执行时间、成功率等异常数据自动触发消息通知基于日志的数据挖掘

很多团队在日志方面可能遇到的一些问题有:

开发人员不能登录线上服务器查看详细日志，经过运维周转费时费力日志数据分散在多个系统，难以查找日志数据量大，查]]></description><category></category></item><item><title><![CDATA[Macbook 卸载 Firefox]]></title><link>https://blog.youkuaiyun.com/onesafe/article/details/51725384</link><guid>https://blog.youkuaiyun.com/onesafe/article/details/51725384</guid><author>onesafe</author><pubDate>Tue, 21 Jun 2016 10:24:53 +0800</pubDate><description><![CDATA[把以下目录删掉
/Applications/Firefox.app

/Users/Username/Library/Application
 Support/Firefox/

/Users/Username/Library/Caches/Firefox

/Users/ Username /Library/Preferences/org.mozilla.firefox.plis]]></description><category></category></item><item><title><![CDATA[ssl certificate]]></title><link>https://blog.youkuaiyun.com/onesafe/article/details/51722351</link><guid>https://blog.youkuaiyun.com/onesafe/article/details/51722351</guid><author>onesafe</author><pubDate>Mon, 20 Jun 2016 17:43:35 +0800</pubDate><description><![CDATA[SSL  认证
1.        制作CSR文件
2.        CA认证
3.        上传证书



首先生成根证书
openssl req –new –x509–keyout ca.key –out ca.crt
 
 
用根证书将我们的cert.csr文件生成crt证书文件
首先建立几个目录和文件
mkdir –p./demoCA/newcerts]]></description><category></category></item><item><title><![CDATA[VIO plugin 不见了]]></title><link>https://blog.youkuaiyun.com/onesafe/article/details/51718719</link><guid>https://blog.youkuaiyun.com/onesafe/article/details/51718719</guid><author>onesafe</author><pubDate>Mon, 20 Jun 2016 09:40:21 +0800</pubDate><description><![CDATA[在vcenter上装了高版本的VIO了，这个时候再装低版本的VIO的话vcenter中的VIO plugin 就不见了


解决方法：
ssh root@vcenter-ip
重启 vsphere-client 
service  vsphere-client restart


具体的不同版本的VIO安装包可以在/etc/vmware/vsphere-client/vc-pac]]></description><category></category></item><item><title><![CDATA[Deploy senlin on VIO]]></title><link>https://blog.youkuaiyun.com/onesafe/article/details/51463512</link><guid>https://blog.youkuaiyun.com/onesafe/article/details/51463512</guid><author>onesafe</author><pubDate>Fri, 20 May 2016 17:41:55 +0800</pubDate><description><![CDATA[apt-get update
deb http://us.archive.ubuntu.com/ubuntu/ trusty main restricted
deb-src
http://us.archive.ubuntu.com/ubuntu/
trusty
main
restricted

deb
http://us.archive.ubuntu.com/ubuntu/
t]]></description><category></category></item><item><title><![CDATA[如何建立本地Ubuntu安装源]]></title><link>https://blog.youkuaiyun.com/onesafe/article/details/51395950</link><guid>https://blog.youkuaiyun.com/onesafe/article/details/51395950</guid><author>onesafe</author><pubDate>Fri, 13 May 2016 15:44:17 +0800</pubDate><description><![CDATA[Ubuntu建立本地源非常实用，很多服务器在局域网没有网络或者网络很慢的情况下，或者需要批量安装同样的软件的时候，如果每一台服务器都去外网下载，是不是很慢，而且也不是一个运维工程师愿意这么干的！那有什么好的办法呢，如下记录ubuntu12.04本地源的安装方法，仅供参考。

系统环境：ubuntu12.04

一、实验目的

是在一台ubuntu12.04服务器上面建立ubuntu常用]]></description><category></category></item><item><title><![CDATA[ubuntu 安装 Jenkins]]></title><link>https://blog.youkuaiyun.com/onesafe/article/details/51392970</link><guid>https://blog.youkuaiyun.com/onesafe/article/details/51392970</guid><author>onesafe</author><pubDate>Fri, 13 May 2016 10:11:54 +0800</pubDate><description><![CDATA[本文出自 “布衣鸟人——成长的记忆”
 博客，请务必保留此出处http://jackmao90.blog.51cto.com/832047/1410784





1.查看Java 是否安装

 java -version

 安装jdk：sudo apt-get install openjdk-7-jdk

2.安装Jenkins


 wget -q -O -]]></description><category></category></item><item><title><![CDATA[OpenStack设置创建实例超过253]]></title><link>https://blog.youkuaiyun.com/onesafe/article/details/50394304</link><guid>https://blog.youkuaiyun.com/onesafe/article/details/50394304</guid><author>onesafe</author><pubDate>Thu, 24 Dec 2015 14:43:31 +0800</pubDate><description><![CDATA[在默认情况下我们使用OpenStack创建实例的个数是10个，通过我们修改/etcnova/nova.conf配置文件添加quota配置后我们可以创建的个数不受10个的限制了
但是这个时候创建实例超过253个的时候就会报错，因为OpenStack默认掩码是24，创建的实例个数最多只能是253个
我们通过修改网络来实现自己配置子网个数


nova network-create --fix]]></description><category></category></item><item><title><![CDATA[Linux  NFS  Server配置]]></title><link>https://blog.youkuaiyun.com/onesafe/article/details/50380922</link><guid>https://blog.youkuaiyun.com/onesafe/article/details/50380922</guid><author>onesafe</author><pubDate>Tue, 22 Dec 2015 16:48:10 +0800</pubDate><description><![CDATA[配置nfs
rpm  -qa  |  grep  nfs
vi  /etc/exports
/mnt/share   *(rw, async)
exportfs  -rv (这个命令可以验证我们设置的配置文件/etc/exports是否正确


chkconfig  --list  |  grep  nfs
chkconfig  nfs on
service  nfs  rest]]></description><category></category></item><item><title><![CDATA[利用LVM制作大容量分区]]></title><link>https://blog.youkuaiyun.com/onesafe/article/details/50380669</link><guid>https://blog.youkuaiyun.com/onesafe/article/details/50380669</guid><author>onesafe</author><pubDate>Tue, 22 Dec 2015 16:23:14 +0800</pubDate><description><![CDATA[LVM将一个或多个硬盘的分区在逻辑上集合，相当于一个大硬盘来使用，当硬盘空间不够使用的时候，可以继续将其他的硬盘的分区加入其中


1. 安装LVM
rpm  -qa  |  grep lvm


2. 安装e4fsprogs
yum -y install e4fsprogs
这个用来对分区进行ext4格式化


3. fdisk -l查看有多少块新硬盘]]></description><category></category></item><item><title><![CDATA[解决OpenStack创建实例不超过10个]]></title><link>https://blog.youkuaiyun.com/onesafe/article/details/50236863</link><guid>https://blog.youkuaiyun.com/onesafe/article/details/50236863</guid><author>onesafe</author><pubDate>Wed, 09 Dec 2015 15:22:14 +0800</pubDate><description><![CDATA[在使用openstack的过程中，默认创建的实例最多10个，这是因为配额默认实例就是10
所以我们需要修改配置文件/etc/nova/nova.conf中的配额参数就可以了
[default] 末尾添加

quota_instances=1000000
quota_cores=20000
quota_ram=5120000000
quota_floating_ips=100000
]]></description><category></category></item><item><title><![CDATA[python @property]]></title><link>https://blog.youkuaiyun.com/onesafe/article/details/47985163</link><guid>https://blog.youkuaiyun.com/onesafe/article/details/47985163</guid><author>onesafe</author><pubDate>Tue, 25 Aug 2015 22:32:04 +0800</pubDate><description><![CDATA[class Student(object):

    @property
    def score(self):
        return self._score

    @score.setter
    def score(self, value):
        if not isinstance(value, int):
            raise ValueError]]></description><category></category></item><item><title><![CDATA[Hbase分布式安装（hbase0.94+zookeeper-3.4.5）]]></title><link>https://blog.youkuaiyun.com/onesafe/article/details/46227609</link><guid>https://blog.youkuaiyun.com/onesafe/article/details/46227609</guid><author>onesafe</author><pubDate>Fri, 29 May 2015 11:14:18 +0800</pubDate><description><![CDATA[之前一直用Hbase自带的zookeeper，然后一直不成功，老出现问题，后来用独立的zookeeper安装成功了，记录下分布式安装Hbase成功的过程


安装zookeeper-3.4.5
1、配置主机名与ip的对应关系，/etc/hosts
 
2、修改配置文件 conf/zoo.cfg
tickTime=2000  
dataDir=/usr/local/zookeeper ]]></description><category></category></item><item><title><![CDATA[Hadoop运行一个job]]></title><link>https://blog.youkuaiyun.com/onesafe/article/details/46043643</link><guid>https://blog.youkuaiyun.com/onesafe/article/details/46043643</guid><author>onesafe</author><pubDate>Wed, 27 May 2015 10:49:25 +0800</pubDate><description><![CDATA[一：安装eclipse插件


要想在eclipse上进行map-reduce编程，需要安装一个插件，hadoop-eclipse-plugin-1.0.0.jar，可以在这里下载

将插件拷贝到eclipse的plugins目录里即可。打开Eclipse，windows–preferences选择Hadoop Map/Reduce填写hadoop的安装目录






]]></description><category></category></item><item><title><![CDATA[linux配置ftp]]></title><link>https://blog.youkuaiyun.com/onesafe/article/details/46043609</link><guid>https://blog.youkuaiyun.com/onesafe/article/details/46043609</guid><author>onesafe</author><pubDate>Wed, 27 May 2015 10:44:40 +0800</pubDate><description><![CDATA[一：安装

yum -y install vsftpd

二：启动

service vsftpd start

service vsftpd stop

service vsftpd restart

chkconfig vsftpd on

三：配置

编辑/etc/vsftpd/vsftpd.conf

anonymous_enable=NO 不允许匿名用]]></description><category></category></item><item><title><![CDATA[Linux服务器安装jdk和tomcat]]></title><link>https://blog.youkuaiyun.com/onesafe/article/details/45952559</link><guid>https://blog.youkuaiyun.com/onesafe/article/details/45952559</guid><author>onesafe</author><pubDate>Sun, 24 May 2015 15:54:48 +0800</pubDate><description><![CDATA[通常发布一个Java web项目需要一个支持Servlet  和 Jsp的服务器，最常用的是tomcat，Jboss，Jetty。我一般选择tomcat发布，简要描述在linux下安装JDK和搭建tomcat服务器过程。

 

第一步：下载JDK

官方下载地址：http://www.oracle.com/technetwork/java/javase/downloads/jdk7-]]></description><category></category></item><item><title><![CDATA[Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again]]></title><link>https://blog.youkuaiyun.com/onesafe/article/details/45816467</link><guid>https://blog.youkuaiyun.com/onesafe/article/details/45816467</guid><author>onesafe</author><pubDate>Mon, 18 May 2015 10:39:33 +0800</pubDate><description><![CDATA[今天在测试环境使用yum安装，遇到一个问题：
Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again


处理很简单，修改文件“/etc/yum.repos.d/epel.repo”， 将baseurl的注释取消， mirrorlist注释掉。即可


参考U]]></description><category></category></item><item><title><![CDATA[安装Hadoop]]></title><link>https://blog.youkuaiyun.com/onesafe/article/details/39583293</link><guid>https://blog.youkuaiyun.com/onesafe/article/details/39583293</guid><author>onesafe</author><pubDate>Fri, 26 Sep 2014 17:40:08 +0800</pubDate><description><![CDATA[一：设置本机无密码登录
cd  ~/.ssh
ss]]></description><category></category></item><item><title><![CDATA[Longest Palindromic Substring]]></title><link>https://blog.youkuaiyun.com/onesafe/article/details/39297089</link><guid>https://blog.youkuaiyun.com/onesafe/article/details/39297089</guid><author>onesafe</author><pubDate>Mon, 15 Sep 2014 19:50:03 +0800</pubDate><description><![CDATA[题目：

给一个字符串s，找到s中最长的回文子串，假定s的最大长度为1000，最长回文子串唯一

分析：

有一个专门针对回文子串的算法，其时间复杂度为O(n),这就是manacher算法。把原串每个字符中间用一个没出现过的字符#分隔开来（非常巧妙的将奇数长度回文串与偶数长度回文串统一起来考虑了），算法的核心是用辅助数组p记录以每个字符为核心的最长回文字符串的半径，也就是p[i]记录了]]></description><category></category></item></channel></rss>