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1, docker: container based Virtualization (hosting applications to application containers) implements an application level resource isolation and quota. What is a container?Container: lightweight Virtualization (sharing the same system kernel). The container is run by the container image.Advantages: h ...

Average load and CPU utilization In real work, we often confuse the average load and CPU utilization, so here, I also make a distinction. You may wonder, the average load represents the active input. If the average load is high, doesn't it mean the CPU utilization is high? We still need to retu ...

How Docker builds a private mirror warehouse, how to access it, and how to delete the private mirror warehouse image Machine Planning Server name (hostname) Operating System Version Intranet IP External Network IP (Analog) Install software docker01 CentOS7.7 172.16.1.31 10.0.0.31 docker dock ...

Yesterday, I ran yum upgrade on the mini computer centos 7.5, which I just got. After restarting, I found that wifi can't connect to the Internet, so I studied it. First, use the ip addr command to view the list of available network devices. If there is no wifi device, you can only see the lo device and two wired network cards: [root@localhost ...

System and information of docker I use: [root@VM_0_10_centos ~]# uname -r #View kernel 3.10.0-862.el7.x86_64 [root@VM_0_10_centos ~]# cat /etc/os-release #View system version and other information NAME="CentOS Linux" VERSION="7 (Core)" ID="centos" ID_LIKE="rhel fedora" VERSION_ID="7" PRETTY_NAME=" ...

There are two ways to implement raid: The performance of software RAID is low because it uses the resources of the host. You need to load the raid software to read data from the software RAID volume. Before loading the raid software, the operating system needs to boot up to load the raid software. No physical hardware is required in software RA ...

The basic concepts of RocketMQ are introduced to you in the previous article. In this section, we will introduce environment construction. The most basic thing in RocketMQ is NameServer. Let's see how it is built first. NameServer RocketMQ requires an environment above JDK8. Let's check the environment first, [root@centOS-1 ~]# java -versio ...

Recently, you need to install the dokcer environment on CentOS 7, recording how to implement it based on Alibaba cloud agent. 1. Replace CentOS image (1) Back up the original image mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup (2) Download new CentOS-Base.repo #CentOS7 only wget -O /etc/yum.repos.d/CentOS-Base.r ...

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 ...

1. NAT mode topology and working principle There is a scheduler in front of a group of servers, which are connected through Switch/HUB. These servers provide the same network service and content, that is, no matter which server the request is sent to, the execution result is the same. The content of the service can be copied to the local hard d ...