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Getting started with Docker Definition of container Stand alone processes running in user space Isolated from other user space programs A container runs in a separate user space At the bottom is a separate kernel space History of development FreeBSD jail， 2000 Linux VServer ,2001 CGroups NameSpace LXC Docker ，2010 libcontainer runC ...

yum configuration using Network yum Library Service Building Environment: use centos 7 as the server and CentOS 6 as the client First, build a local yum with the image Configure / etc/yum.repo.d/bash.repo configuration file [root@centos7 yum.repos.d]# ls bak base.repo Without this file, you can create ...

Upgrade plan Scope of influence: During the upgrade, the existing system will not be affected, and the system will maintain normal operation. After the upgrade, the availability test will be conducted for a period of time, and the monitoring on production will be replaced after the system is stable. Upgrade method: This upgrade adopts the blue ...

1, Preparation The system requires CentOS 7.X and above, with a kernel of at least 3.10 and 64 bit 1.1. Use uname -r to check the kernel version [root@localhost ~]# uname -r 3.10.0-693.5.2.el7.x86_64 1.2. Set up Alibaba CentOS warehouse to update plug-ins / software packages more smoothly Step 1: execute the fo ...

1, Environment 1. Operating system: CentOS Linux release 7.2.1511 (Core) minimized installation version 2. MySQL version: MySQL-5.7.18 (mysql-5.7.18-1.el7.x86_64.rpm-bundle.tar ) 2, Installation process 1. Install wget. [root@Geeklp-MySQL ~]# yum -y install wget 2. Download the installation package. wget -c ...

corosync v1 + pacemaker Corosync: an open cluster engine project derived from the development of OpenAIS to Wilson, which provides heartbeat message detection and member management. Pacemaker: cluster explorer. It uses the message and member management capabilities provided by the cluster infrastructure (OpenAIS, heartbeat or corosync) to dete ...

1. Briefly describe the four cluster characteristics and usage scenarios of lvs LVS has three load balancing modes, VS/NAT (nat mode), VS/DR (routing mode), VS/TUN (tunnel mode), VS/FULLNAT 1. NAT mode (VS-NAT) Principle: The destination address of the IP header of a packet sent by a client is replaced by the IP address of one of the RSs on t ...

1. MySQL installation (install using yum) yum install mysql* –y Linux MySQL data is stored in / var/lib/mysql by default/ [root@study ~]# cd /var/lib/mysql/ [root@study mysql]# ll //Total consumption 20488 -rw-rw----. 1 mysql mysql 10485760 5 23 23:55 ibdata1 -rw-rw----. 1 mysql mysql 5242880 5 23 23:55 ib_logfile0 -rw-rw----. 1 mysql mysql 5 ...

preparation in advance Execute yum update openssh to upgrade first. The official upgrade is okay anyway.If you have previously manually compiled an upgrade of openssh, test yourself for changes to the default profile path.) (Unified openssh version 7.4p1 is prepared here before Unified Compile Installation is upgraded to openssh 8.2p1) [root@n ...

The following problems were encountered while installing docker [root@sm-docker249 yum.repos.d]# yum install docker-ce docker-ce-cli containerd.io Loaded plugins: fastestmirror, langpacks docker-ce-nightly | 3.5 kB 00:00 docker-ce-stable | 3.5 kB 00:00 d ...