Programmer Group

Experimental requirements: Kubernetes was successfully deployed to prepare for subsequent experiments 1. Environmental requirements Server requirements: • recommended minimum hardware configuration: 2-core CPU, 2G memory, 20G hard disk • it is better for the server to access the external network. There will be a need to pull the ima ...

Summary: It is not difficult to build an MQTT server on linux CentOS. It mainly uses mosquitto, a message broker service software. It adopts publish / subscribe mode transmission mechanism, which is lightweight, simple, open and easy to implement. It is widely used in the Internet of things. MQTT is a client server based message publish / ...

Great! Someone introduced Ansible Playbook like this! After a series of basic training and honing, it finally came to the application of relatively tall. (Nani is just starting to review his future: https://blog.csdn.net/qq_41765918/category_11512932.html) 1. What is playbook Chinese Name: script, which is an automatic processing script. P ...

preface After we purchase a ECs, we usually need to install some common software. This article will introduce the common installation methods and configurations of some softwareBefore installing the software, we need to do some preparatory workFirst, check whether the yum source is available. If the following figure appears, it indicates ...

CentOS expansion volume grouppv, vg, lvPhysical volume (PV): refers to the hard disk partition, or the entire hard disk or the created soft RAID. It is the basic storage device of LVM.Volume group (VG): a storage pool composed of one or more physical volumes. One or more logical volumes can be created on the volume group.Logical volume (LV): si ...

This article introduces the installation of hdp3.14 + ambari 2.7.4. If you want to use other versions, you can go to the official website to query the version adaptation Cloudera Support Matrix In addition, the official website also provides detailed guidance on the installation process, which can be referred to the official website Installat ...

Content of this paper Problems solved by DockerDocker discussionDocker common commandsBrief description of Docker image, network and data volumeDockerFileDockerComposeContainer orchestration Swarm and k8s Note: the content of this article comes from the Docker video summary of crazy God talking java in station B. 1, Why did Docker appear &e ...

tar command Use the tar command to package, compress, and decompress files: Compress the file using gzip and specify the compression name tar_gzip.tar.gz [root@ikta ~]# tar -czvf tar_gzip.tar.gz find_test1 find_test2 find_test1 find_test2 Compress the folder using bzip2 and specify the compression name tar_bzip2.tar.bz2 [root@ikta ~]# tar ...

Prepare tool: 1.Four centos7 servers, one client In this experiment, four servers are used, one server installs haproxy for scheduling, the other two servers build nginx to provide web services, and one client tests access. ····················· HostsystemIPfunctionHAproxycentos7192.168.254.214HAproxynginxcentos7192.168.254.226nginxnginxcen ...

Construction of centos7 Nacos service registry Since the spring cloud registry Eureka has long stopped maintenance, we use Nacos official: https://nacos.io/zh-cn/docs/what-is-nacos.html Welcome to the world of Nacos! Nacos is dedicated to helping you discover, configure, and manage microservices. Nacos provides a set of easy-to-use feature ...