Programmer Group

When installed on a large scale, it is easy to operate manually and improve efficiency by using unattended equipment. PXE Network Installation Configuration of Dual Network Cards Here, ens33 is a nat network, ens37 is a host-only network, and ens37 is configured. [root@localhost ~]# cd /etc/sysconfig/network-scripts/ [root@localhost networ ...

The use of api 1. Install salt-api [root@server1 ~]# Yum install-y salt-api # install API 2. Generating certificates and secret keys [root@server1~] # cd/etc/pki/tls/private/# generates certificates and private keys [root@server1 private]# openssl genrsa 2048 > localhost.key [root@server1 private]# c ...

Summary Deploy web01, web02, nfs, db01, backup, build wordpress, WeCenter, share, hot standby, real-time backup 1) Install nginx and php on web01 and web02 2) Create www users [root@web01 php]# groupadd www -g 666 [root@web01 php]# useradd www -u 666 -g 666 -s /sbin/nologin -M [root@web02 php]# groupadd www -g 666 [root@web02 php]# useradd www ...

Network protocol OSI Seven-Layer Model and TCP/IP Four-Layer Model TCP Protocol and UDP Protocol TCP protocol: Transport control protocol. It is a connection-oriented protocol, which must establish a reliable connection with the other party before sending data. UDP protocol: User datagram protoco ...

Catalog Overview of ansible jinja2 template ansible jinja2 template usage Basic grammar jinja2 Template Logic Judgment ansible jinja2 manages nginx ansible jinja2 management keepalived Keeping alived original match Push the keepalived configuration file Prepare the k ...

1. Why use Harbor Harbor is open source, free software Harbor is for enterprise users Harbor has a friendly WEB management interface II. Harbor Official Resources https://github.com/goharbor/harbor/blob/master/docs/installation_guide.md https://github.com/goharbor/harbor/releases Prerequisite 1: Installation of docker Delete the old versio ...

Article directory I. About ETCD II. Stand-alone Installation 3. Building Clusters Official website: https://etcd.io/ Github: https://github.com/etcd-io/etcd/releases I. About ETCD etcd is an open source, distributed key-to-value data storage system that provides shared configuration, service ...

Real-time reading directory files to HDFS cases Case requirements: Use flume to listen for files in the entire directory Implementation steps: 1. Create the configuration file "flume-dir-hdfsconf" touch flume-dir-hdfs.conf vim flume-dir-hdfs.conf a3.sources = r3 a3.sinks = k3 a3.c ...

1. Limit the maximum file size that users can create: [root@localhost ~]# vim /etc/security/limits.conf #Edit the file # /etc/security/limits.conf lvjianzhao soft fsize 90000 #This is a soft limit. The unit is KB. lvjianzhao hard fsize 102400 #This is a hard limit. The unit is KB. ...

DNS Domain name resolution refers to the domain name to the IP of the website space, so that people can easily access the website through the registered domain name. IP address is the digital address that identifies the site on the network. In order to facilitate memory, domain name is used instead of IP address to identify the site address. D ...