https://github.com/licenseware/unique-elbv2-listener-rule-priority
Create unique priority for Elastic Load Balancer Listener Rule
https://github.com/licenseware/unique-elbv2-listener-rule-priority
aws elasticloadbalancing github-actions
Last synced: 2 months ago
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Create unique priority for Elastic Load Balancer Listener Rule
- Host: GitHub
- URL: https://github.com/licenseware/unique-elbv2-listener-rule-priority
- Owner: licenseware
- License: other
- Created: 2022-05-05T16:55:04.000Z (about 4 years ago)
- Default Branch: main
- Last Pushed: 2026-04-19T03:50:07.000Z (3 months ago)
- Last Synced: 2026-04-19T05:30:56.647Z (3 months ago)
- Topics: aws, elasticloadbalancing, github-actions
- Language: Python
- Homepage:
- Size: 19.5 KB
- Stars: 2
- Watchers: 2
- Forks: 0
- Open Issues: 7
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# Unique ELBv2 Listener Rule Priority
Without any conflict, generate random priotity for a Elastic Load Balancer
Listener Rule.
## Usage
### Prerequisites
For each kind of run, you will need to configure the credentials first, so
consider adding the following step before each of the below approaches:
```yaml
- name: Configure AWS credentials
uses: aws-actions/configure-aws-credentials@v1
with:
aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
aws-region: ${{ env.REGION }}
```
For this to work, you also need a user with (at least) the following policies
(hopefully in a cloud formation template):
```yaml
GitHubActionsUser:
Type: AWS::IAM::User
Properties:
UserName: !Ref GitHubActionsUserName
# The permissions that the GitHub Actions deployment workflow will have
GitHubActionsUserPolicy:
Type: AWS::IAM::Policy
Properties:
Users:
- !Ref GitHubActionsUser
PolicyName: allow-github-actions-cloudformation-deploy
PolicyDocument:
Version: "2012-10-17"
Statement:
- Action:
- "elasticloadbalancing:DescribeRules"
Effect: Allow
Resource: "*"
```
### Produce only one priority
```yaml
- uses: licenseware/unique-elbv2-listener-rule-priority@v1
name: Get unique listerner rule priority
id: elb-priority
with:
listener-arn: ${{ secrets.LOAD_BALANCER_LISTENER_ARN }}
- uses: aws-actions/aws-cloudformation-github-deploy@v1
with:
name: sample-elb-priority
template: cloudformation-templates/myapp-dev.yml
no-fail-on-empty-changeset: "1"
role-arn: ${{ secrets.CLOUD_FORMATION_ROLE_ARN }}
parameter-overrides: >-
MyAppLBPriority=${{ steps.elb-priority.outputs.priorities }}
```
### Produce multiple priorities
```yaml
- uses: licenseware/unique-elbv2-listener-rule-priority@v1
name: Get unique listerner rule priority
id: elb-priority
with:
listener-arn: ${{ secrets.LOAD_BALANCER_LISTENER_ARN }}
sorted: true
delimiter: " "
count: 3
- name: Get load balancer priorities
run: |
export PRIORITIES=$(echo ${{ steps.elb-priority.outputs.priorities }})
cat << EOF >> $GITHUB_ENV
MYAPP_LB_PR=$(echo $PRIORITIES | awk '{print $1}')
YOURAPP_LB_PR=$(echo $PRIORITIES | awk '{print $2}')
HISAPP_LB_PR=$(echo $PRIORITIES | awk '{print $3}')
EOF
- uses: aws-actions/aws-cloudformation-github-deploy@v1
with:
name: sample-elb-priority
template: cloudformation-templates/myapp-dev.yml
no-fail-on-empty-changeset: "1"
role-arn: ${{ secrets.CLOUD_FORMATION_ROLE_ARN }}
parameter-overrides: >-
MyAppLBPriority=${{ env.MYAPP_LB_PR }},
YourAppLBPriority=${{ env.YOURAPP_LB_PR }},
HisAppLBPriority=${{ env.HISAPP_LB_PR }}
```
## Inputs
| Name | Description | Required | Default |
|------|-------------|----------|---------|
| listener-arn | The ARN of the ELBv2 Listener to generate the priority for. | true |
| count | The number of priorities to generate. | false | 1 |
| min-priority | The minimum priority to use. | false | -1000 |
| max-priority | The maximum priority to use. | false | 1000 |
| max-try | The maximum number of tries to generate a unique priority. | false | 10 |
| log-level | The log level to use. | false | error |
| sorted | Whether to sort the resulting priorities. | false | true |
| delimiter | The delimiter to use on the resulting the priorities. | false | "," |
## Outputs
| Name | Description | Example |
|------|-------------|---------|
| priorities | Comma-separated list of generated priorities. | 1,2,3 |