S3InvalidBucketName - S3 Invalid Bucket Name

#Common Causes

• →Identity: IAM policy allows bucket creation but name invalid. Service Control Policy (SCP) enforces naming rules.
• →Network: VPC endpoint bucket naming restrictions. Bucket name format invalid.
• →Limits: Bucket name too short (<3 characters) or too long (>63 characters). Invalid characters in name. Name starts/ends with period or hyphen. Name contains uppercase letters. Consecutive periods.

✓Solutions

1. 1Step 1: Diagnose - Check bucket name length: echo BUCKET_NAME | wc -c. Verify length is 3-63 characters. Check if too short or too long.
2. 2Step 2: Diagnose - Check for invalid characters: Verify only lowercase letters, numbers, periods, hyphens. Check for uppercase letters. Verify no special characters.
3. 3Step 3: Diagnose - Check name format: Verify doesn't start/end with period or hyphen. Check for consecutive periods. Verify follows DNS naming conventions.
4. 4Step 4: Fix - Generate valid bucket name: BUCKET_NAME="my-app-$(date +%s)". Ensure lowercase: BUCKET_NAME=$(echo ${BUCKET_NAME} | tr '[:upper:]' '[:lower:]'). Validate length: [ ${#BUCKET_NAME} -ge 3 ] && [ ${#BUCKET_NAME} -le 63 ].
5. 5Step 5: Fix - Create bucket with valid name: aws s3api create-bucket --bucket ${BUCKET_NAME} --region us-east-1. For other regions: aws s3api create-bucket --bucket ${BUCKET_NAME} --region REGION --create-bucket-configuration LocationConstraint=REGION.

</>Code Examples

1# Validate bucket name
2validate_bucket_name() {
3  local name=$1
4  
5  # Check length (3-63 characters)
6  if [ ${#name} -lt 3 ] || [ ${#name} -gt 63 ]; then
7    echo "Error: Bucket name must be 3-63 characters"
8    return 1
9  fi
10  
11  # Check for uppercase letters
12  if [[ $name =~ [A-Z] ]]; then
13    echo "Error: Bucket name must be lowercase"
14    return 1
15  fi
16  
17  # Check for invalid characters (only lowercase, numbers, periods, hyphens allowed)
18  if [[ ! $name =~ ^[a-z0-9.-]+$ ]]; then
19    echo "Error: Bucket name contains invalid characters"
20    return 1
21  fi
22  
23  # Check for consecutive periods
24  if [[ $name =~ \.\. ]]; then
25    echo "Error: Bucket name cannot contain consecutive periods"
26    return 1
27  fi
28  
29  # Check if starts/ends with period or hyphen
30  if [[ $name =~ ^[\.-] ]] || [[ $name =~ [\.-]$ ]]; then
31    echo "Error: Bucket name cannot start or end with period or hyphen"
32    return 1
33  fi
34  
35  echo "Bucket name is valid: $name"
36  return 0
37}
38
39# Test validation
40validate_bucket_name "my-bucket-123"  # Valid
41validate_bucket_name "My-Bucket"      # Invalid (uppercase)
42validate_bucket_name "my..bucket"     # Invalid (consecutive periods)
43validate_bucket_name "-my-bucket"     # Invalid (starts with hyphen)

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