Ganglia of Flume monitoring

About Ganglia Ganglia is an open source cluster monitoring visualization tool initiated by UC Berkeley, which is designed to measure thousands of nodes. Ganglia's core includes gmond, gmetad and a Web front end. It is mainly used to monitor the system performance, such as: cpu, mem, hard disk utilizat ...

Posted by mackevin on Wed, 19 Feb 2020 23:19:50 -0800

CentOS7 installation and operation Docker

1. Confirm kernel version CentOS7 kernel is generally 3.10, which meets the installation conditions (> = 3.8) uname -r //perhaps uname -a 2. update pack yum unpdate -y This process may be a little slow. If there is a higher version of kernel, it will update back to 3.10 View the current default kernel grub2-editenv list Changed to newer k ...

Posted by jameslloyd on Wed, 19 Feb 2020 06:38:38 -0800

Replace CentOS yum source under RedHat6.9

Catalog Check and delete the original yum source Download the yum source for CentOS Install RPM package yum configuration Modify yum configuration Clean up and rebuild cache Because red hat's Yum needs to be charged and registered before it can be used. So I want to update the yum source to ...

Posted by Bizzle on Wed, 19 Feb 2020 05:44:06 -0800

Introduction to yum package management

rpm can realize fast and simple installation of programs (compared with compilation and installation), but rpm can't solve dependency by itself, so many tools come into being to solve dependency automatically, among which yum is one of them. yum solution to dependency: There must be a file server where all the rpm packages and the package rel ...

Posted by jiggens on Sat, 15 Feb 2020 18:47:48 -0800

Mysql_01 (basic)

Getting started with mysql 01 What is a database? Classification of database The construction of mysql database mysql introduction Installation software Initialization View initial password Login with initial password & & modify initial password Modify password policy Related parameters ...

Posted by burge124 on Thu, 13 Feb 2020 04:46:37 -0800

centos 7 deploys and localizes Gitlab and basic operations

Gitlab is an open source application developed using Ruby on Rails that implements a Git project repository that can be accessed through a Web interface from public or private projects Gitlab has similar capabilities as Github to browse source code, manage bugs and comments.Can manage team access to the repository, he is very easy to browse su ...

Posted by McChicken on Sat, 08 Feb 2020 08:27:13 -0800

LVS-DR mode + ldirectord + preserved + Tun tunnel mode + wrr weight

What is LVS? LVS (Linux Virtual Server), or Linux virtual server, is an open source load balancing project led by DR. Zhang wensong. At present, LVS has been integrated into Linux kernel module. This project implements the load balancing scheduling scheme of data request based on IP in Linux kernel. I ...

Posted by ifuschini on Wed, 05 Feb 2020 02:59:10 -0800

Building MySQL Replication Cluster High Availability Architecture Based on MHA

Introduction to MHA architecture MHA is the abbreviation of Master High Availability. It is a relatively mature solution for MySQL high availability at present. Its core is a set of scripts written in perl language. It is an excellent set of high availability software for failover and master-slave promotion in MySQL high availability environme ...

Posted by xtopolis on Sat, 01 Feb 2020 08:52:44 -0800

The construction of varnish proxy server

Varnish is a high-performance open source HTTP Accelerator, Open source reverse proxy and cache servers, Norway Verdens Gang, the largest online newspaper, replaced 12 squids with three varnishs, with better performance than before Basic access to the website firefox - > hosts/dns - > varnish - > server - > varn ...

Posted by purpendicular on Fri, 31 Jan 2020 01:40:49 -0800

Configure Linux Cluster time synchronization (ntp)

Environmental Science:Now there are three virtual machines of CentOS 7, namely, Hadoop 102, Hadoop 103 and Hadoop 104. Now configure ntp service (central server) on Hadoop 102. Hadoop 103 and 104 pull the time on Hadoop 102 respectively 1. Check whether ntp is installed (check and install all 3 sets, ...

Posted by shaoen01 on Thu, 30 Jan 2020 08:16:00 -0800