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1. purpose lvs is a four-tier load balancing. keepalived provides lvs with highly available services and checks the health status of the backend nginx. Nginx is mainly used for seven tier load balancing 2. topological graph Server IP address description Director master 192.168.3.105 LVS kept alive Director standby node 192.168.3.104 LVS ke ...

Recently, we need to draw function diagrams for some data, because the requirements are not very high. I hope to draw a diagram as soon as possible, and I don't want to install any special software. I just use the python drawing package matplotlib to do it, which is convenient and fast, and the drawing is not bad. Here is a brief record.   Th ...

How to use Bosh to deploy applications Updated: April 23, 2018 Install bosh environment Download Bosh binary installer click download Install virtulbox wget https://download.virtualbox.org/virtualbox/5.2.10/virtualbox-5.2_5.2.10-122088~Ubuntu~trusty_amd64.deb dpkg -i virtualbox-5.2_5.2.10-122088~Ubuntu~trusty_amd64.deb Install some dependen ...

[toc] Example: In [1]: import asyncio In [2]: async def f(i): ...: await asyncio.sleep(i) ...: print(i) ...: In [3]: async def func(): ...: tasks = [] ...: for i in range(10): ...: await asyncio.sleep(0) ...: print('create process parameter ', i) ...: tasks.append(asyncio.crea ...

Main contents: 1. Lrzsz installation; 2. Application; The SecurityCRT telnet\ssh installed on win7 logs in to VMware Fedora 9. When transferring files, SSH is installed to upload and download files. Today, Maizi told me that there are commands that can be used directly. It used to be rz and sz. Let's sort them out.   I. ins ...

Sharing graph of wechat friend circle in pure Java 1. Realize the effect of sharing chart 2. Development environment 2.1 JDK *oracle's JDK above 1.8 2.2 font *If you choose Microsoft YaHei font and the code is deployed to Linux, you need to install Microsoft YaHei font, and google the font installation mode 3. Loading background 3.1 loading ba ...

Exercises Table 1 mysql> create database linux50 charset utf8; Query OK, 1 row affected (0.00 sec) mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | linux50 | | ming | | mysql | | performance_schema | | test | | world ...

>Original article, welcome to reprint. Reprint please indicate: reprint from IT people's story meeting Thank you!>Original link address: Building the Mesos cluster environment of "advanced" docker (24) This time, I will start to operate. First, I will install the MES. How to install the MES. Source code: https://github.com/lim ...

psutil introduction psutil is a cross platform library( http://code.google.com/p/psutil/ )It can easily obtain the process and system utilization (including CPU, memory, disk, network, etc.) information of the system. It is mainly used in system monitoring, analysis and limitation of system resources and process management. It implements the ...

1. Strengthen the understanding of kubectl config command in combination with kubectl deployment kubectl config command generates cluster information, cluster users and user permissions and writes these contents to the configuration file read by kubectl The kubectl config command executed when deploying kubectl is as follows [root@k8s-master a ...