# Migrate EBS Volumes from gp2 to gp3

## What It Does

Migrates Amazon EBS volumes from `gp2` to `gp3`. The `gp3` volumes offer better price-performance compared to `gp2`, allowing cost savings without compromising performance. This migration is performed safely with snapshot backup and volume modification.

## Risk and Scope

| Detail                   | Value     |
| ------------------------ | --------- |
| **Risk Level**           | Low       |
| **AWS Service Targeted** | EC2 / EBS |

{% hint style="warning" %}

## Permissions Required

**Modify and Create Permissions**

* `ec2:ModifyVolume`
* `ec2:CreateSnapshot`

**Read Permissions**

* `ec2:DescribeVolumes`
* `ec2:DescribeSnapshots`

> These permissions are granted **only to the runbook**, not to the OneLens platform itself.
> {% endhint %}

## Optimization Policies Addressed

This runbook remediates violation tickets triggered by of the following policy:

| Policy ID | Policy Name                                              |
| --------- | -------------------------------------------------------- |
| ebs\_1    | General purpose EBS volumes should be of gp3 volume type |

## Risk Mitigation

{% hint style="success" %}

## Risk Mitigation Strategy

* **Snapshots are** **taken** before the change to prevent any data loss.
* The volume can be **re-created** from that snapshot if needed.
  {% endhint %}

## How to Install

Refer to the [Runbook Setup Guide ](/automate/remediations/runbooks/install-runbooks.md#installing-a-runbook)for steps to install and enable this runbook in your environment.

## Runbook Workflow

### Step 1: Start

**Trigger:** Begins the workflow to migrate EBS volumes from `gp2` to `gp3`.

### Step 2: DescribeVolumes

**Action:** Executes `DescribeVolumes` on EC2 to gather details of all volumes.

### Step 3: setIOPS

**Action:** Runs a script to determine the appropriate IOPS value for the `gp3` volume.

### Step 4: If/Else

**Condition:** Determines whether the volume type is `gp2`.

1. **If the volume is gp2, proceeds with the migration steps:**
   1. **SnapshotVolume**\
      Executes `CreateSnapshot` on EC2 to create a backup of the volume.
   2. **WaitForSnapshotCompletion**\
      Executes `DescribeSnapshots` to ensure the snapshot has completed.
   3. **ModifyVolume**\
      Executes `ModifyVolume` on EC2 to convert the volume type to `gp3` with the specified IOPS.
2. **Else:**\
   Terminates the runbook as the volume is not `gp2`.

## See How it Works

<figure><img src="/files/oWSdN9VXvZjmLlhfoonu" alt=""><figcaption></figcaption></figure>

## Triggering the Runbook

To run this workflow:

### **1. Locate the Ticket**

Identify the ticket associated with the above mentioned policy violation.

### **2. Execute the Runbook**

Follow the steps described in the [executing a runbook](/automate/remediations/runbooks.md#executing-a-runbook) section to apply this runbook to the ticket.


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