kubernetes HPA - Ultra Detailed Chinese Official Document

The full name of HPA is Horizontal Pod Autoscaler, translated into Chinese is POD level autoscaling. HPA will replace Horizontal Pod Autoscaler with HPA below. HPA can automatically scale the number of pods in replication controller, deployment and replicaset based on CPU utilization rate (in addition to CPU utilization, it can also be based o ...

Posted on Sat, 11 Apr 2020 12:11:17 -0700 by gamblor01

Analysis of Linux RCU principle

background Read the fueling source code! - by Lu Xun A picture is worth a thousand words. --By Golgi Explain: Kernel version: 4.14 ARM64 processor, Contex-A53, dual core Using tool: Source Insight 3.5, Visio 1. overview RCU, read copy update, is a synchronization mechanism in Linux kernel.RCU is often described as an alternative to read-w ...

Posted on Sat, 11 Apr 2020 05:00:45 -0700 by stephfox

Huawei FusionCompute Virtual Machine Mount Point Disk Space Online Expansion

Requirement Description: The Oracle database cannot function properly due to insufficient mount point/usr disk space on a platform test environment database server (192.168.104.7) in the data center. Therefore, an online expansion of the / usr mount point is required, from 200 G to 300 G. The process is as follows: 1. Log on to the virtual ...

Posted on Fri, 10 Apr 2020 11:41:34 -0700 by swizenfeld

device does not seem;RTNETLINK answers:File exists

The problem of Centos 7 server's abnormal networkTroubleshooting steps:1. Confirm whether there is an IP address2. Whether the network card is restarted successfully3. Whether there is a conflicting Network & Network manger4. Check whether the configuration file of the network card is normalWarning: mainly look at the Log. The default Log ...

Posted on Tue, 07 Apr 2020 23:14:11 -0700 by needphphelp

Database migration directory for mysql installation in Linux Yum

Because the company's database directory is full of storage, it is unable to add space to replace the data directoryWarning: before changing the data directory, ask whether it is in use or not. If the database is read-write or other operations, it is recommended to operate at night.1. Disable MySQL database [root@mysql ~]# systemctl stop mysq ...

Posted on Tue, 07 Apr 2020 07:16:08 -0700 by am_25

Streaming media server and Hikvision Dahua camera realize video monitoring and live broadcasting solutions

With the acceleration of Internet plus Internet of things, the application of video surveillance has become more and more extensive. Among them, Hikvision Dahua and other brand cameras are frequently seen in the field of vision. Because last year also realized the video monitoring scheme on the smart site project, and the current live broadcast ...

Posted on Tue, 07 Apr 2020 03:43:13 -0700 by FramezArt

Openstack computing host installation and configuration process II

Openstack computing host installation and configuration process 1. Environment configuration Hosts configuration   modify the / etc/hosts file and add wtcontroller, wtcompute1 and wtcompute2: 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost ...

Posted on Mon, 06 Apr 2020 08:53:20 -0700 by Toboe

Summary of k8s add node operation exceptions

Environment: k8s cluster with kubeadm mode not Question: 1. Check the versions of kubeadm, kubelet and kubectl installed in the source system [root@k8s-3 ~]# yum list kubeadm kubelet kubectl  //Loaded plug-in: fastestmirror Loading mirror speeds from cached hostfile  * base: mirrors.nju.edu.cn  * epel: ftp.riken.jp  * extras: mirrors.nju.edu.c ...

Posted on Mon, 06 Apr 2020 01:00:14 -0700 by ldmccla

How to test Linux command run time?

Liang Xu has written a Shell script in his work. This script can obtain time from four NTP servers in turn, and then set the most reliable time to system time. Because we have a high demand for time, we need to get the right time in a short time. So we need to test the running time of this script to see how long it will take from the start to t ...

Posted on Sun, 05 Apr 2020 21:35:52 -0700 by maGGot_H

Optimize Nginx service performance based on parameters

Reference material [1] . learn Linux operation and maintenance from the old boy: Web Cluster practice, old boy setup script Number of worker processes optimizing Nginx service The configuration parameters of the Nginx service corresponding to the optimized Nginx process are as follows Worker? Processes 1;? Sp ...

Posted on Sun, 05 Apr 2020 12:20:15 -0700 by nelson201