# Tag an Application Load Balancer
<a name="load-balancer-tags"></a>

Tags help you to categorize your load balancers in different ways, for example, by purpose, owner, or environment.

You can add multiple tags to each load balancer. If you add a tag with a key that is already associated with the load balancer, it updates the value of that tag.

When you are finished with a tag, you can remove it from your load balancer.

**Restrictions**
+ Maximum number of tags per resource—50
+ Maximum key length—127 Unicode characters
+ Maximum value length—255 Unicode characters
+ Tag keys and values are case sensitive. Allowed characters are letters, spaces, and numbers representable in UTF-8, plus the following special characters: \$1 - = . \$1 : / @. Do not use leading or trailing spaces.
+ Do not use the `aws:` prefix in your tag names or values because it is reserved for AWS use. You can't edit or delete tag names or values with this prefix. Tags with this prefix do not count against your tags per resource limit. 

------
#### [ Console ]

**To update the tags for a load balancer**

1. Open the Amazon EC2 console at [https://console.aws.amazon.com/ec2/](https://console.aws.amazon.com/ec2/).

1. On the navigation pane, choose **Load Balancers**.

1. Select the load balancer.

1. On the **Tags** tab, choose **Manage tags**.

1. To add a tag, choose **Add tag** and enter the tag key and tag value.

1. To update a tag, enter new values in **Key** or **Value**.

1. To delete a tag, choose **Remove** next to the tag.

1. Choose **Save changes**.

------
#### [ AWS CLI ]

**To add tags**  
Use the [add-tags](https://docs.aws.amazon.com/cli/latest/reference/elbv2/add-tags.html) command.

```
aws elbv2 add-tags \
    --resource-arns load-balancer-arn \
    --tags "Key=project,Value=lima" "Key=department,Value=digital-media"
```

**To remove tags**  
Use the [remove-tags](https://docs.aws.amazon.com/cli/latest/reference/elbv2/remove-tags.html) command.

```
aws elbv2 remove-tags \
    --resource-arns load-balancer-arn \
    --tag-keys project department
```

------
#### [ CloudFormation ]

**To add tags**  
Update the [AWS::ElasticLoadBalancingV2::LoadBalancer](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/aws-resource-elasticloadbalancingv2-loadbalancer.html) resource to include the `Tags` property.

```
Resources:
  myLoadBalancer:
    Type: 'AWS::ElasticLoadBalancingV2::LoadBalancer'
    Properties:
      Name: my-alb
      Type: application
      Scheme: internal
      Subnets: 
        - !Ref subnet-AZ1
        - !Ref subnet-AZ2
      SecurityGroups: 
        - !Ref mySecurityGroup
      Tags:  
        - Key: 'project'
          Value: 'lima'
        - Key: 'department'
          Value: 'digital-media'
```

------