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Environment Overview 1.1 System Requirements This guide covers the deployment of a high-availability load balancing solution using HAProxy and Keepalived on CentOS 6.8 64-bit. The solution ensures that client requests are distributed across backend servers while providing automatic failover capability when the primary load balancer becomes u ...

Installing Nginx with YUM Ensure the system repositories are up to date: yum update -y Installl Nginx directly from the EPEL repository (if not already enabled): yum install -y epel-release yum install -y nginx Enable and start the service: chkconfig nginx on service nginx start Allow HTTP traffic through the firewall: iptables -I INPUT -p t ...

Creating System User for Repository Management Begin by creating a dedicated system account without a home directory: useradd -M developer_user The -M flag prevents automatic creation of the /home/developer_user directory. Establish a password for the new user: passwd developer_user Follow the prompts to enter the desired password twice. Esta ...

Environment CentOS Linux release 7.5.1804 (Core) MySQL version: mysql80-community-release-el7-1 Pre-installation Check CentOS 7 ships with MariaDB by default. Verify weather MySQL is already installed: rpm -qa | grep mysql [admin@localhost ~]$ rpm -qa | grep mysql [admin@localhost ~]$ An empty result indicates no MySQL packages are present ...

Implementing Real-time File Synchronization with Sersync and Rsync This guide details the implementation of a real-time file synchronization solution using Sersync and Rsync on CentOS systems. This setup allows for automatic synchronizasion of local file modifications to a remote directory, making it ideal for backup solutions and content mirro ...

System Environment Host: Windows 10 Pro with VMWare Workstation 15 Pro Guest: CentOS 7.6.1810 (Core) Privilegse: Root user Procedure Refresh the package index and upgrade instaleld packages. yum update -y Install required development libraries and tools. yum groupinstall "Development Tools" -y yum install zlib-devel bzip2-devel ope ...

When setting up a dual-boot system with Windows 10 and CentOS 7, it's a common scenario for the GRUB2 bootloader installed by CentOS 7 not to automatically detect and list the Windows 10 operating system. This often occurs because GRUB2, by default in CentOS 7, may lack the necessary support to recognize and interact with the NTFS filesystem us ...

Note: The setup with CentOS 8 (kernel 4.18) is not viable. Switch the client and MDS to Ubuntu (tested successfully on Ubuntu 18.04 with kernel 4.15) while keeping the setup steps the same. With the rapid development of networking and parallel computing, file I/O has become a bottleneck for overall system performence. Traditional NFS versions f ...

Kubernetes Environment Planning Pod Network (podSubnet): 10.244.0.0/16 Service Network (serviceSubnet): 10.96.0.0/12 Lab Environment Specifications: Operating System: CentOS 7.5 Configuration: 2GB RAM / 4 vCPU / 50GB HDD Initializing the Kubernetes Cluster Environment First, set up the production environment server. Later, node environments can ...

RPCbind Service Failure on CentOS 7.4 Issue Summary After rebooting a virtual machine, NFS mounts configured in /etc/rc.local failed to execute properly. Root Cause Analysis The root cause was that the rpcbind service failed to start, which prevented NFS mounts from functioning. Attempting to restart the service reuslted in the following error: ...