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Ansible Tests Details and Use Cases   Host Planning   Add user account Explain: 1. Login accounts used by operations and maintenance personnel; 2. All businesses are placed under / app / in the "home directory of yun users" to avoid the disorder of business data; 3. This user is also used by ansible because almost all production en ...

cgroup cgroup introduction cgroup, a control group, provides a mechanism for controlling the use of resources by a specific group of processes. cgroup binds a process set to one or more subsystems. Why cgroup Group the processes uniformly, monitor the processes and manage the resources on the basis of grouping. subsystem cgroup is a mechanism t ...

1, Environment introduction Two centos7.4 system machines: machine host name 10.1.31.36 kubernetes master 10.1.31.24 kubernetes node1 2, Preparations The following steps are to be performed on both hosts.You need to pull docker image. Please install docker first. 1. Relationship between K8s and docker version [`https://github.com/ku ...

Recently, I encountered a problem upgrading Gentoo, and there was a compilation error upgrading the media LIBS / mesa package media-libs/mesa-17.1.10 I'm upgrading from mesa-17.0.6. An error is reported when compiling. The error information is as follows /bin/sh ../../../libtool --tag=CC --mode=compile x86_6 ...

ELK schema log processing logic: 1. When Filebeat is installed in the business layer, it will automatically obtain the domain name and environment information of the host running site, add channel and env tags, and take the value of channel as the topic information of kafka 2. Kafka receives the new field and Topic information of Filebeat, and ...

Almost all the secure RMS streaming on the Internet provide a rm "garbage" recycle bin, which is a bad recipe for server environment. I think it might be better to provide a secure rm to protect some important files or directories from deletion and avoid the tragedy of deleting important data by mistake. I wrote a script: https://gith ...

There are too many official introductions about Docker on the Internet that I won't post. As a practical experience, Docker can greatly simplify the process of setting up environment and deploying services, greatly reduce the time cost of deployment, and free your hands. This article will not go into the Docker underlying architecture and how ...

This skill comes from my actual development: This function is used to convert ip address into network byte order. Its prototype is in addr INET addr (const char * CP); The return value is an in ﹣ addr ﹣ T type. Obviously, this is not a standard data type of c language. If you want to find out what type it is, you must find the header file. ...

10. nginx reverse proxy load balancing (1) Description of LNMP architecture migration database Migrating databases: Using the database backup command (mysql mysqladmin mysqldump) 1) Back up database information mysqldump -uroot -poldboy123 --all-databases >/tmp/bak.sql ll /tmp/bak.sql -h scp /tmp/bak.sql 172.16.1.51:/tmp/ 2) Restore data ...

linux starts to install web server 1 from 0linux connects to the Internet -- linux installs web server 2Installing gcc -- linux installing web server 3 linux install mysql5.6 -- linux install web server 3 After php7.1, mcrypt series functions are not supported, Considering that many of my friends used to use mcrypt series of encryptio ...