Root Partition Resize

Objective

Demonstrate how to resize the root partition after initialize the OpMon’s instance of on Amazon, this documentation is indicate for the cases where the configuration  defined by default was changed.

Target audience

Administrator and user who after change the size of the disk space, need apply this change on file system.

Requirements

The following setting must be run using root privileges

Performing partition resize

You must run the following commands as root:

a) Make the reboot instance of OpMon,

[root@opmon ~]# reboot

b) After reboot, run the following command to verify that the partition size change has been applied:

[root@opmon ~]# lsblk
NAME    MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
xvda    202:0    0  220G  0 disk 
└─xvda1 202:1    0  220G  0 part /

 

In the above example the size of the partition that was 200GB was increased to 220GB.

c) However, when querying the file system size, using the command shown below, it is observed that the increase was not applied to it:

[root@opmon ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/xvda1      197G  4.7G  183G   3% /
tmpfs           1.9G     0  1.9G   0% /dev/shm

d)To apply the increase to the file system, you must execute the resize2fs command applied to the respective file system, according below:

[root@opmon ~]# resize2fs /dev/xvda1

e) After run the resize2fs command we can again check the size of the file system with the purpose of validating the changes:

[root@opmon ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/xvda1      217G  4.7G  201G   3% /
tmpfs           1.9G     0  1.9G   0% /dev/shm
Updated on 01/09/2021

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