Skip to content

Instantly share code, notes, and snippets.

@dezren39
Last active April 4, 2020 02:55
Show Gist options
  • Save dezren39/83e8453be4777c260dee5a2c56127249 to your computer and use it in GitHub Desktop.
Save dezren39/83e8453be4777c260dee5a2c56127249 to your computer and use it in GitHub Desktop.
Sync EC2 EBS Tags with their EC2 Instances.
# Sync EBS tags with their instances.
# Script for non-CloudFormation managed tag cleanup.
# Credit: https://www.yobyot.com/aws/tag-aws-ec2-ebs-volumes-with-the-instance-name-tag/2017/02/05/
# Uses legacy AWSPowerShell monolith module.
# Assumes appropriate Exec Policy, Allow Gallery, etc...
# Install-Module AWSPowershell
Import-Module AWSPowerShell # Must import the module if you haven't already.
Set-AWSCredentials -ProfileName default # Update as needed.
Set-DefaultAWSRegion -Region us-east-1 # Update as needed.
(Get-EC2Instance).Instances | `
ForEach-Object -Process { # For each instance,
$instance = $_ # Store instance details for later use within another ForEach
$instance.Tags | `
ForEach-Object -Process { # For each tag on on the current instance,
$instanceTagKey = $_ | Select-Object -ExpandProperty Key # Store Tag Key, its name.
$instanceTagValue = $_ | Select-Object -ExpandProperty Value # Store Tag Value.
$instance.BlockDeviceMappings | `
ForEach-Object -Process { # For each ebs volume related to the current instance,
$volumeId = $_.ebs.volumeid # Store volumeId for current ebs volume
$volumeTagKey = Get-EC2Tag -Filter @(@{ name = "tag:$instanceTagKey"; values = "*" }; @{ name = "resource-type"; values = "volume" }; @{ name = "resource-id"; values = $volumeid }) | Select-Object -ExpandProperty Value # If exists, get the value of the current tag from the ebs volumeid
if (-not $volumeTagKey) { # if the tag isn't already present, no overwrites only additions
New-EC2Tag -Resources $volumeid -Tags @{ Key = $instanceTagKey; Value = $instanceTagValue } # add the current tag to the current ebs volume
"New-EC2Tag -Resources $volumeid -Tags `@{ Key = `"$instanceTagKey`"; Value = `"$instanceTagValue`"}" # console output
}
}
}
}
# Delete unused tags:
# Get-EC2Tag | ? {$_.key -eq 'Example Key'} | % {
# Remove-EC2Tag -Resources $_.resourceId -Tags @{ Key = $_.key }
# "Remove-EC2Tag -Resources $($_.resourceId) -Tags @{ Key = $($_.key) }"
# }
# Find RDS tags:
# Get-RDSDBInstance | select -ExpandProperty DBInstanceArn | Get-RDSTagForResource
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment