pyflexebs project by Mark Veltzer

description: Pyflexebs will allow you to monitor and expand/contract your EBS volumes in aws

project website: https://veltzer.github.io/pyflexebs

author: Mark Veltzer

version: 0.0.89

github

build

pypi

pypi download

How to create a package this code?

Make sure you have internet access, as the following commands may pull packages off the internet.

Install git

On a yum system:

$ sudo yum install git

On an apt system:

$ sudo apt install git

Clone the repository:

$ git clone https://github.com/veltzer/pyflexebs

CD into the repository:

$ cd pyflexebs

Build the executable

On a yum system:

$ ./build.yum.sh

On an apt system:

$ ./build.apt.sh

The result is in the dist folder in a file called pyflexebs-[VERSION]. This file is an executable that should run on all linux platforms.

How to install this package as a service?

$ sudo ./pyflexebs-[version] service_install

How to remove this package as a service?

$ sudo ./pyflexebs-[version] service_uninstall

How to start the service

$ sudo ./pyflexebs-[version] service_start

or

$ sudo systemctl start pyflexebs.service

How to stop the service

$ sudo ./pyflexebs-[version] service_stop

or

$ sudo systemctl stop pyflexebs.service

How to configure the service

After installing the service you will get a config file called /etc/pyflexebs.json. This is the configuration file for the service. Any change in parameters in this file will effect the next run. Edit this to your hearts content. If you don't know what a specific parameter means just use:

$ ./pyflexebs-[version] daemon_run --help

Remember to configure proxy information if you need it. It can be configured in the config file in the following lines:

"no_proxy": "localhost,169.254.169.254",
"http_proxy": null,
"https_proxy": null,

Reducing AWS EBS Volumes

Assuming we want to reduce EBS, the first thing we will need to do is to make a note of the root volume’s block device name and our instance’s availability zone

1. Stop the instance

2. Detach the volume from instance

3. Create a new instance

4. Create an empty Amazon EBS volume with size require in the same availability zone

5. Attach both volumes to the instance and again note all device name details.

Block Device Name Big Volume = /dev/sdb Block Device Name Small Volume = /dev/sdg

7. Restart the Instance and Login:

Create a file system for the new volume you have created

sudo mkfs -t ext4 /dev/xvdg

Create two mount directories and mount the new volumes.

sudo mkdir /mnt/big
sudo mount /dev/xvdf /mnt/big
sudo mkdir /mnt/small
sudo mount /dev/xvdg /mnt/small

Sync big to small

rsync -aHAXxSP /mnt/real/ /mnt/small

Umount the smaller

umount /dev/xvdg

8. Stop new instance

9. Detach the small volume from new instance

10. Attached the small volume to orig instance with same block device

11. Start the orig instance

12. Login instance #1 a. Mount small disk mount /dev/xvdb /mnt/xvdb

13. After every thing is working you can remove the big volume. recommend to save it for 1-2 week before removing

contact me

[email protected]

Mark Veltzer, Copyright © 2020, 2021, 2022, 2023, 2024, 2025, 2026