Centos 7.x systemd对比Centos 6.x daemon
从CentOS 7.x开始，CentOS开始使用systemd服务来代替daemon，原来管理系统启动和管理系统服务的相关命令全部由syste
MySQL Unable to lock ibdata1 error 11 fix
A bad shutdown can cause such erros on MySQL.
InnoDB: Unable to lock ./ibdata1, error: 11 InnoDB: Check that you do not already have another mysqld process InnoDB: using the same InnoDB data or log files. InnoDB: Error in opening ./ibdata1 For solution mv ibdata1 ibdata1.bak cp -a ibdata1.bak ibdata1 service mysqld restart
ceph集群jewel版本部署osd激活权限报错
环境 ceph version 10.2.2 (45107e21c568dd033c2f0a3107dec8f0b0e58374) ceph-deploy 1.5.34 ceph集群jewel版本部署过程中执行osd激活操作如下 ceph-deploy osd activate ceph13:/dev/sdb1:/dev/sda2 报错内容如下 [2016-07-29 00:05:19,106][ceph_deploy.conf][DEBUG ] found configuration file at: /root/.cephdeploy.conf [2016-07-29 00:05:19,107][ceph_deploy.cli][INFO ] Invoked (1.5.34): /bin/ceph-deploy osd activate ceph13:/dev/sdb1:/dev/sda2 [2016-07-29 00:05:19,107][ceph_deploy.cli][INFO ] ceph-deploy options: [2016-07-29
使用国内源部署Ceph
由于网络方面的原因，Ceph的部署经常受到干扰，通常为了加速部署，基本上大家都是将Ceph的源同步到本地进行安装。根据Ceph中国社区的统计
R420服务器idrac连接用户数超限制
Dell R420服务器中，比较经常出现idrac无法连接，或者连接用户数超限(RAC0218错误)的问题，升级iDrac卡firmware至1.5
运维工具汇总之 性能调优，性能监控，性能测试
性能调优 性能监控 性能测试
Git常用命令备忘
配置 Git的设置文件为.gitconfig，它可以在用户主目录下（全局配置），也可以在项目目录下（项目配置）。 # 显示当前的Git配置 $ git config --list
Docker for Mac Beta尝鲜
Docker for Mac Docker for Mac 是一个原生的苹果应用程序，被安装到 /Application 目录。安装时会创建 /usr/local/bin 目录下的 docker、docker-compose、docker-mac
kernel igb 00000500 0 eth0 reset adapter
系统环境 CentOS 6.4 igb driver version 4.0.1-k 报错信息如下 Jun 3 13:20:05 localhost kernel: igb 0000:05:00.1: eth1: Reset adapter Jun 3 13:20:06 localhost kernel: igb 0000:05:00.0: eth0: Reset adapter Jun 3 13:20:11 localhost kernel: igb: eth1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX Jun 3 13:20:12 localhost kernel: igb: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow
DNSPOD API SSL证书调整(subjectAltName)引起的报错
报错信息如下： Python 2.7 (r27:82500, Jan 7 2014, 23:14:35) [GCC 4.1.2 20080704 (Red Hat 4.1.2-50)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import requests >>> r = requests.get("https://dnsapi.cn") Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/local/lib/python2.7/site-packages/requests-2.0.0-py2.7.egg/requests/api.py", line 55, in get return request('get', url, **kwargs) File "/usr/local/lib/python2.7/site-packages/requests-2.0.0-py2.7.egg/requests/api.py", line 44, in request return session.request(method=method, url=url, **kwargs) File