DevOps Kubernetes

kubectl Quick Reference

Kubectl autocomplete BASH source <(kubectl completion bash) # set up autocomplete in bash into the current shell, bash-completion package should be installed first. echo “source <(kubectl completion bash)” >> ~/.bashrc # add autocomplete permanently to your bash shell. You can also use a shorthand alias for kubectl that also works with completion: alias k=kubectl complete -o default […]

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DevOps

Install Terraform on CentOS Using Package Repository

The HashiCorp repository contains other non-Terraform packages that will be available for installing after you add the repository. Follow the steps to install Terraform from the official HashiCorp repository on a CentOS system. 1. Install the yum-utils tools: sudo yum install -y yum-utils 2. Add the HashiCorp repository: sudo yum-config-manager –add-repo https://rpm.releases.hashicorp.com/RHEL/hashicorp.repo 3. Finally, install Terraform using […]

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DevOps

Install Jenkins on Rocky Linux 9

Configure jenlkins repo. sudo wget -O /etc/yum.repos.d/jenkins.repo \ https://pkg.jenkins.io/redhat-stable/jenkins.repo sudo rpm –import https://pkg.jenkins.io/redhat-stable/jenkins.io-2023.key sudo yum upgrade # Add required dependencies for the jenkins package sudo yum install fontconfig java-17-openjdk sudo yum install jenkins sudo systemctl daemon-reload Weekly release A new release is produced weekly to deliver bug fixes and features to users and plugin developers. […]

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Docker tutorials sinhala
DevOps Red hat linux

Deploy a Docker registry server with Authentication

Before you can deploy a registry, you need to install Docker on the host. A registry is an instance of the registry image, and runs within Docker. Install docker service with bellow commands. dnf config-manager –add-repo=https://download.docker.com/linux/centos/docker-ce.repo dnf install -y docker-ce –nobest systemctl enable –now docker dockerstatus=`systemctl status docker | grep “active (running)”` echo “Docker Service […]

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Red hat linux

Setup SCTP In Red Hat / CentOS Linux 8

1. Install kernel-modules-extra and SCTP for the currently installed kernel; yum install kernel-modules-extra-`uname -r` yum install -y lksctp-tools lksctp-tools-devel lksctp-tools-doc 2. Add sctp to /etc/modules-load.d/* to load sctp before systemd-sysctl.service during boot. Loading sctp before systemd-sysctl.service allows the sctp sysctl.conf settings to be effective; # cat /etc/modules-load.d/sctp.conf sctp 3. sctp is blacklisted by default on […]