Ansible study notes

Ansible introduce Ansible is a new automated operation and maintenance tool. It is developed based on Python and integrates the advantages of many operation and maintenance tools (puppet, cfengine, chef, func, fabric), and realizes functions such as batch system configuration, batch program deployment, and batch running commands. No client. ...

Posted by livvylove on Tue, 26 Apr 2022 21:34:55 +0300

Full record of installing Oracle11g in CentOS7 in 2021

Installing oracle on linux is often used in actual operation and maintenance. Just recently, I reinstalled the system. By the way, I recorded the whole process of installing oracle. environmental information Different environments may have small differences, which are similar. To prevent influence, the version information I use is give ...

Posted by ibo on Tue, 26 Apr 2022 01:17:39 +0300

maven private server setup

In this paper macbook pro Build in environment maven Private server, package and deploy the basic code for team members to download temporarily (for a long time, you can apply to the company for a server installation and deployment), so as to increase the reusability of the code and the code specification of team members. preface The o ...

Posted by baitubai on Mon, 25 Apr 2022 12:35:04 +0300

Nginx prevents large traffic attacks and restricts traffic access ----------- limit_req_zone module

1, Several algorithms of current limiting (1) . counter algorithm It's a little simple and crude to use the counter to limit the number of requests that can pass within one second. For example, the current limiting qps (query rate per second) is 100. The implementation idea of the algorithm is to start timing from the first request. In th ...

Posted by jvquach on Mon, 25 Apr 2022 02:48:03 +0300

Interaction free Shell programming

catalogue 1, Here Document interaction free 1.1 here document overview 1.2 precautions for use of here document 1.3 here document operation 1.3Here Document variable setting 2, Expect 1. expect introduction 2. expect basic command 1, Here Document interaction free 1.1 here document overview Using I/O redirection to provide a list ...

Posted by suicide-boy on Sun, 24 Apr 2022 18:33:01 +0300

CentOS7 mount the CentOS7 everything installation CD and set the yum source as the mounted CD

CentOS7 mount the CentOS7 everything installation CD and set the yum source as the mounted CD 1, Mount CD First, you need to put the disc into the optical drive. The device file cdrom under / dev will be used for mounting: [root@localhost ~]# ls -lh /dev/cdrom lrwxrwxrwx. 1 root root 3 1 November 23:55 /dev/cdrom -> sr0 Mount command i ...

Posted by dreams4000 on Sun, 24 Apr 2022 01:49:05 +0300

Building ntp time synchronization service on linux

1. Introduction to NTP NTP (Network Time Protocol) is a protocol used to synchronize computer time. It can make the computer synchronize its server or clock source, and it can provide high-precision time correction (the difference between LAN and standard is less than 1 millisecond, and tens of milliseconds on WAN). For the server cluster, thi ...

Posted by berbbrown on Fri, 22 Apr 2022 06:25:26 +0300

docker - install and deploy K8S cluster

kubernetes In Greek, it means captain or navigator Before the container technology, if multiple applications are running on the physical server, one application may occupy most of the resources, which may lead to the performance degradation of other applications. One solution is to run each application on different physical servers, but it ca ...

Posted by kevinn on Thu, 21 Apr 2022 05:24:35 +0300

Django project practice: CMDB asset scanning and DevOPS automatic operation and maintenance

Article catalogue Project practice: CMDB automatic asset scanning and automatic operation and maintenance 1. Project introduction2. Project technical analysis Difficulties and pain points of operation and maintenance automationTechnical difficulties of the projectOverall engineering design3. Project environment construction Projec ...

Posted by amar3d on Mon, 18 Apr 2022 18:43:37 +0300

Advanced learning of operation and maintenance: MySQL single table query

MySQL third job MySQL single table query job The material is as follows: DROP TABLE IF EXISTS `course`; CREATE TABLE `course` ( `cs_id` int(11) NOT NULL COMMENT 'course number', `cs_name` varchar(50) NOT NULL COMMENT 'course name', `cs_credit` tinyint(255) unsigned DEFAULT NULL COMMENT 'course credit', `cs_type` char(12) DEFAULT NULL CO ...

Posted by shak123 on Mon, 18 Apr 2022 10:16:06 +0300