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I. Docker Network Settings By default, docker creates a bridge network card [docker 0]. docker has two mapping modes: random mapping and specified mapping. Tip: Random mapping is not commonly used in production scenarios, but the advantage of random mapping is that it is allocated by docker and ports do not conflict. Case 1: S ...

This requirement is now particularly common, such as generating small program sharing graphs, generating circle of friends sharing graphs and so on, generally text + two-dimensional code + background template. Today we use imagine to accomplish this task and use it as an interview module for the website. The layout of my shared map is as follow ...

Background environment [root@node1 log]# cat /etc/redhat-release CentOS Linux release 7.3.1611 (Core) mysql's official download address II. Installation steps 1. Add mysql group and mysql user to set up the owner and group of mysql installation directory file. #Users and user groups are automatically created here. [root@node1 op ...

Preface As you may know, there is a common tool for analyzing Kernel Dump called Crash. When I first started to learn how to analyze Kernel Dump, I spent a lot of time toggling about the use of this tool, but I always forgot its function.Later, one time when I participated in an internal sharing, I was very impressed by a big guy who said, &quo ...

Sed is a stream editor. It is a very useful tool in text processing. It can perfectly cooperate with regular expressions and has extraordinary functions. When processing, the currently processed rows are stored in a temporary buffer called pattern space, and then the contents of the buffer are processed with sed command. Afte ...

Recently, when using saltstack to get token, there are always 401 certification failures. Baidu Google has searched a lot of data and failed to solve them. Well, this time, basically the mistakes have come out. This time, I blame myself for not being too careful. With more recent events, when I saw the error, I had some psychological explosi ...

Multi-host collaboration work is that the time synchronization of each host is very important. Time inconsistency will cause many important application failures, such as encryption protocol, log, cluster and so on. NTP protocol is used to synchronize the time of each computer in the network. Currently, NTP protocol is a prerequisite in the op ...

This tutorial uses the operating system CentOS 7. docker installation configuration If the docker is not installed on the machine, it can be installed quickly by the following means (for maximum consistency, the version specified here): yum -y install docker-1.12.6-28.git1398f24.el7.centos.x86_64 #Start docker systemctl start ...

Ansible can use the command line to manage automatically. Command management tools are supported by a series of modules and parameters. The basic grammar is as follows: ansible  <host-pattern>  [ –m  module_name ]  [ –a  args] <host-pattern> : Which hosts are valid [ –m  module_name ]  :Specify the module to be used [-a args ]  :M ...

This paper is based on entos 7 installation configuration Nginx operation practice record collation. Configuration of EPEL Sources sudo yum install -y epel-release sudo yum -y update II. Installation of Nginx sudo yum install -y nginx After successful installation, the default website directory is: / usr/share/nginx/html The default configurat ...