Programmer Group

Introduction to Cobbler Cobbler is a Linux server installation service. It can quickly install and reinstall physical servers and virtual machines through PXE, and manage DHCP, DNS, etc. Cobbler can use command-line management, also provides a Web-based interface management tool (cobbler Web), also provides an API interface, which is conveni ...

Nginx Nginx is a high-performance, lightweight web service software with high stability, low system resource consumption and high processing capacity for HTTP concurrent connections. Frequently used commands Experimental steps 1. Obtain the source package on Windows remotely and mount it on Linux2. Decompress the source package and download t ...

In the CenOS 7 system, openssh server is provided by openssh, openssh server and other software packages (installed by default), and sshd has been added as a standard system service. You can execute systemctl status sshd to view the status of the service. As long as you have a legal login shell, you can log in to the operating system remotely ...

Task: you need to define services in nagios to detect the state of three DC S (1. Host state, 2. Consumer cluster state, 3.nomad cluster state). As long as one of the service states fails, trigger nagios eventhandler to change the link file of dns server, as shown in the figure above. Script: server address in script is different from actual ...

domain name Although you can visit your website directly through ip address, we seldom see that the website is accessed through ip address, and generally the website will provide domain name. The domain name is intuitive and easy to remember, and the resolved ip address can be changed without changing the domain name accessed by the user. The d ...

Error when creating pod If the pod fails, the following two prompts will be displayed [root@master ~]#kubectl get pods NAME READY STATUS RESTARTS AGE net-test1-7c9c4b94d6-5mddl 1/1 Running 0 2m41s net-test1-7c9c4b94d6-xk8jp 0/1 ImagePullBackOff 0 5s [root@master ...

Separation of internal and external traffic by coredns scene The domain name of the old service is fixed, and the service cannot be accessed directly through the internal service. Need to split internal and external traffic automatically Realization Through the rewrite function of coredns, the above capabilities can be realized. For example ...

Experiment requirements: install Apache and DNS servicesAdd two network cards to the virtual machine[root@localhost ~]# yum install bind httpd -yAdd network card Building a virtual host based on domain name access 1. Provide domain name resolution for virtual host [root@localhost ~]# vim /etc/named.conf //Configure DNS master profile [roo ...

Building a virtual host 1. Introduction to virtual host There are three types of virtual hosts commonly used in Enterprises: (1) based on domain name(2) port based(3) IP based Virtual web host Running multiple web sites in the same physical server, each of which does not occupy a real computer independently Types of virtual hosts supported by ...

Virtual Web host Running multiple Web sites in the same physical server, each site does not occupy a real computer independently. Types of virtual hosts supported by httpd Domain name based virtual host Virtual host based on IP address Port based virtual host Build virtual host -- Based on domain name (1) install bind and httpd services. (2 ...