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Top:pip install supervisor is recommended to install the latest version of supervisor. The highest version of yum install supervisor is 3.1.4. There are many bug s. Name explanation supervisor: The name of the software to be installed.Supervisord: After installing the supervisor software, supervisord is used to start the supervisor service.supe ...

Experimental environment Environment: CentOS 7.3, a disk SDB is divided into a partition sdb1. Install disk quota support software yum install quota Make a file system and mount it in a way that supports quota functions mkfs.ext4 /dev/sdb1 mount /dev/sdb1 /tmp mount -o remount,usrquota,grpquota /dev/sdb1 Check whether disk quota technology is ...

#################sshd services two computers can login without password ssh, which is a safer way. sshd connection: Host Connect Virtual Machine [kiosk@foundation71 ~]$ ssh root@172.25.254.100 -X root@172.25.254.100's password: Last login: Sun Aug 18 15:57:46 2019 [root@desktop ~]# ########## The f ...

Topology required for the experiment: First, three machines shut down selinux and firewall. [root@hostlocal ~]# systemctl stop firewalld [root@hostlocal ~]# iptables -F [root@hostlocal ~]# setenforce 0 // temporary, if permanently closed, modify / etc/sysconfig/selinux and change enforcing to disable ...

Since we've been working on several Ceph projects recently, basically 50 nodes, we often use PXE technology in our projects to automate system installation and improve efficiency. It might be said that PXE technology is too old to understand, but I think it's very useful, especially in project-based projects.So today's experiment is to deploy t ...

Get Super User Access Rights Root user: In RedHat 7.2, the root user privilege is higher than the general privilege on the file system. It is used in the management system. When performing tasks such as installing or deleting software and managing system files and directories, the privilege must be ...

Cluster environment: centOs6.8: hadoop102，hadoop103，hadoop104 JDK version: jdk1.8.0_144 hadoop version: Hadoop 2.7.2 First, prepare three clients (hadoop 102, Hadoop 103, Hadoop 104), close the firewall, and modify them to static ip and ip address mapping. Configuration cluster Writing Cluster Distribution Scripts Create a remote synchro ...

Through blog posts: Haproxy service tuning and configuration detailsYou can already understand the role of Haproxy services;Through blog posts: Using Keepalived to Realize Hot Detailed Interpretation of Dual ComputerYou can already understand the role of Keepalived services. Haproxy service is a tool to build cluster scheduling with good perfo ...

  The function of master-slave replication: Data distribution Load Balancing (Read) Backup High Availability and Fault Switching MySQL Upgrade Test The way of master-slave replication: Master-slave duplication Mutual dominance and subordinate replication Semi-synchronous replication   P ...

1. Download mongodb Go to the mongodb website to download the page: https://www.mongodb.com/download-center/community Download the corresponding version, such as the latest version of Linux x64 bit: mongodb-linux-x86_64-ubuntu1604-4.2.0.tgz     ...