ECR life cycle policy (limitation of only 1 rule with "any" tag is quite limiting). I need a rule with >6 months and image count >3

You can achieve your goal using a single lifecycle policy rule with the "any" status. Here's a sample JSON policy that retains images with an age of fewer than 180 days (6 months) or at least the 3 most recent images:

{
  "rules": [
    {
      "rulePriority": 1,
      "description": "Retain at least 3 images and images younger than 180 days",
      "selection": {
        "tagStatus": "any",
        "countType": "imageCountMoreThan",
        "countNumber": 3
      },
      "action": {
        "type": "expire"
      }
    },
    {
      "rulePriority": 2,
      "description": "Retain images less than 180 days old",
      "selection": {
        "tagStatus": "any",
        "countType": "sinceImagePushed",
        "countUnit": "days",
        "countNumber": 180
      },
      "action": {
        "type": "expire"
      }
    }
  ]
}

This policy works as follows:

The first rule retains the 3 most recent images, regardless of their age or tag status. The second rule retains any images that are less than 180 days old. By combining these two rules, you will retain at least the 3 most recent images and all images that are less than 180 days old. Images that do not meet either of these conditions will be expired.

To apply this policy, create a file named lifecycle-policy.json, copy the JSON content above, and save it. Then, use the AWS CLI to apply the policy to your ECR repository:

aws ecr put-lifecycle-policy --repository-name your-repository-name --lifecycle-policy-text file://lifecycle-policy.json

Replace your-repository-name with the name of your ECR repository.

as per your comment

you can follow the following steps

1. Sign in to the AWS Management Console and open the Amazon Elastic Container Registry (ECR) console at https://console.aws.amazon.com/ecr/.
2. In the left navigation pane, click on "Repositories".
3. Choose the repository for which you want to create a Lifecycle Policy.
4. Click on the "Lifecycle policies" tab at the top of the page.
5. Click on the "Create" button.
6. In the "Create lifecycle policy" wizard, you can create the rules one at a time. You'll have to create two rules as described in the previous JSON policy example.
7. For the first rule (tagged images):

• Set a description (e.g., "Remove tagged images older than 6 months with image count more than 3").
• Set the "Rule priority" to 1.
• Choose "Tagged" for "Image status".
• Choose "imageCountMoreThan" for "Match criteria".
• Set the "Number of images" to 3.
• Choose "Older than" for "Evaluation criteria".
• Set the "Age" to 6, and choose "Months" as the unit.
• Click on "Add rule". 8.For the second rule (untagged images):
• Set a description (e.g., "Remove untagged images older than 6 months with image count more than 3").
• Set the "Rule priority" to 2.
• Choose "Untagged" for "Image status".
• Choose "imageCountMoreThan" for "Match criteria".
• .Set the "Number of images" to 3.
• Choose "Older than" for "Evaluation criteria".
• Set the "Age" to 6, and choose "Months" as the unit.
• Click on "Add rule". 9.Once you've added both rules, click on the "Create policy" button to finalize the policy.