Harisfazillah Jamel linuxmalaysia

Resize root partition by removing the default /home partition) on CentOS 8

This requires you to be able to ssh into the instance using the root user account and that no services be running as users out of /home on the target machine. You can check this by command fuser /home

The examples are from a default installation with no customation-you NEED to know what you're working with for volumes/partitions to not horribly break things. Use this at your own risk. *** AT YOUR OWN RISK ***. Im only tested this on Centos 8 of mine.

By default, CentOS 8 uses XFS for the file system and Logical Volume Manager (LVM), creating 3 partitions: /,/home and /boot. Check with df -h and du -h of /home to make sure the space is enough.

Step 1 - Copy /home Contents

To backup the contents of /home, do the following:

MySQL Directory Move Into New Partition (Example /home)

Login as root or any user that NOT using /home stop mariadb service such as systemctl stop MariaDB

Make sure SELINUX is permissive mode. View file /etc/selinux/config

Step 1 - Copy /home Contents

To backup the contents of /home, do the following:

	1. Create SSL

	Please adjust IP and domain name as per site.

	=========

	Rujukan

	https://www.elastic.co/guide/en/elasticsearch/reference/current/configuring-security.html

	#!/bin/bash
	# By Harisfazillah Jamel
	# 16 Jan 2021
	#=== backup script
	#=== mysqldump-restore-script.sh dbname user password ipaddress

	NAMADATABASE="${1}"
	NAMAUSER="${2}"
	DBPASSWORD="${3}"
	HOST="${4}"


	====

	Ref: https://www.vultr.com/docs/how-to-deploy-google-bbr-on-centos-7

	yum install byobu openssh fail2ban httpd



	rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org

	Cluster Control On Centos 8 Using Podman

	https://severalnines.com/download-clustercontrol-database-management-system

	https://severalnines.com/docs/user-guide/ui.html#import-existing-server-cluster

	https://severalnines.com/docs/installation.html

	https://severalnines.com/product/clustercontrol/clustercontrol-community-edition

	#!/bin/bash
	# Harisfazillah Jamel - 20211216
	# Part of script from https://wiki.lyrasis.org/display/DSPACE/Idle+In+Transaction+Problem
	# Idle In Transaction Problem

	pgprocess_array=( $( /usr/bin/pgrep -f 'idle in transaction' ) )

	/usr/bin/pgrep -f 'idle in transaction' \| wc -l \| logger

	for r in "${pgprocess_array[@]}"; do

	# uptime report every 1 minutes everyday
	/10 * * * root uptime \| logger -t uptime > /dev/null
	/10 * * * root free -h \| head -2 \| tail -1 \| logger -t free > /dev/null

	#!/bin/bash
	#https://stackoverflow.com/questions/29710618/vacuum-analyze-all-tables-in-a-schema-postgres
	# this is to be run from postgis user
	# 20211216

	PG_SCHEMA='yourschema'
	PG_USER='postgres'
	PG_HOST='localhost'
	PG_DB='yourdb'
	PG_PASS=''

	#!/usr/bin/env bash
	# https://gist.github.com/ppartarr/018a3858bba8655dc421cc4589598d97
	## sudo snap install lxd --classic
	## this is only for jammy
	## Harisfazillah Jamel 20221009

	set -euo pipefail # -> http://redsymbol.net/articles/unofficial-bash-strict-mode/
	# Reverse what lxd init does

	function check_distro() {