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Directory: 1. Introduction to RBDCommon RBD CommandsRBD Configuration OperationRBD mounted on operating systemSnapshot ConfigurationExport Import RBD Mirror Introduction to RBD RBD is short for RADOS Block Device. RBD block storage is the most stable and common storage type.RBD block devices like disks can be mounted.RBD block devices have sna ...

The previous article learned about disk partition, format, mount and other related knowledge. This article will explain RAID and LVM technology. Disk management operation is mainly used by operation and maintenance personnel. If it's just a developer, you can skip this article first. But in many small companies, it is often one person for multi ...

grub: GRand Unified Bootloader grub 0.x: grub legacy(centos5，6) grub 1.x: grub2(centos7) grub legacy(grub 0.x) stage1: mbr The sector after stage 1_5: mbr enables the bootloader in stage 1 to identify the file system on the partition where stage 2 is located stage2: partition (/ boot/grub /) centos6: # ls /boot/grub/ device.map fat_stage ...

In the above experiment, we did not do any installation configuration, all with the help of Cobbler.However, in practice, we have corresponding requirements for each host's hard disk partition and installed software, so we need to customize the KickStart file by ourselves so that we can customize the mass installation of the operating system.W ...

Program Functions The main function of this program is to import data from files into the clickhouse database. [Problem Description] Server memory runs out at regular intervals [Problem Analysis] Because it was developed in go language, pprof, a tool popular in the industry, was used. Reference URL:https://cizixs.com/2017/09/11/profiling-golang ...

There are many high availability schemes for MySQL, such as dual master, MHA, MMM, etc. here is just the simplest dual master high availability scheme. 1, Configure MySQL as master-slave 1. Environmental preparation system IP host name service Centos 7.5 192.168.20.2 mysql01 MySQL+keepalived Centos 7.5 192.168.20.3 mysql02 MySQL+keepali ...

1. Questions I created a VMware virtual machine to install OpenStack Kolla. Since only 8G of space was allocated to the root directory when the virtual machine was created, it was obviously not enough for later use and I wanted to expand 10G of space. View Current Disk [root@kolla-queens ~]# fdisk -l Disk /dev/sda: 21.5 G ...

With the latest stable version 1.17.2, memo the problems of the Scheduler during the initial deployment of the cluster. Edition [root@host131 ansible]# kubectl get node -o wide NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION ...

Environmental Science Centos 7 SVN 1.7 Install SVN Shell> yum install svn -y Prepare configuration and warehouse Shell> mkdir -p /mydata/repo Shell> cd /mydata/repo/ Shell> svnadmin create erp　　#Create a code base, here take erp as an example The configuration file of the code ba ...

Get ready I use docker deployment on CentOS, so I need to prepare docker related operations in advance docker CentOS installation To configure mapping A host has multiple virtual machines, so it needs to use different named configuration folders, such as / etc/mysql/my.cnf.d/master01, to distingu ...