![\"S3](\"https:\/\/baresupport.jp\/blog\/wp-content\/uploads\/2026\/09\/image-2.png\")
<\/figure>\n\n\n\n\u307e\u305a\u3001S3\u30d0\u30b1\u30c3\u30c8\u4e0a\u306e\u7279\u5b9a\u306e\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u3092\u30eb\u30fc\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3068\u3059\u308b\u30a2\u30af\u30bb\u30b9\u30dd\u30a4\u30f3\u30c8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
Bash<\/p>\n\n\n\n
aws s3files create-access-point \\\n\u00a0 --file-system-id <YOUR_FILE_SYSTEM_ID> \\\n\u00a0 --root-directory '{\"path\": \"\/lambda\", \"creationPermissions\": {\"ownerUid\": 1000, \"ownerGid\": 1000, \"permissions\": \"755\"}}' \\\n\u00a0 --region ap-northeast-1<\/code><\/pre>\n\n\n\n<\/span> \u2461\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30b0\u30eb\u30fc\u30d7\u306e\u8abf\u6574\uff08\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\uff09<\/strong><\/span><\/h3>\n\n\n\nLambda\u304b\u3089\u30de\u30a6\u30f3\u30c8\u30bf\u30fc\u30b2\u30c3\u30c8\uff08NFS\uff1a\u30dd\u30fc\u30c82049\uff09\u3078\u306e\u901a\u4fe1\u3092\u8a31\u53ef\u3059\u308b\u305f\u3081\u3001\u30de\u30a6\u30f3\u30c8\u30bf\u30fc\u30b2\u30c3\u30c8\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30b0\u30eb\u30fc\u30d7\u306b\u5bfe\u3057\u3066\u3001Lambda\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30b0\u30eb\u30fc\u30d7\u304b\u3089\u306e\u30a4\u30f3\u30d0\u30a6\u30f3\u30c9\u30eb\u30fc\u30eb\uff08TCP 2049\uff09\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
Bash<\/p>\n\n\n\n
# \u30de\u30a6\u30f3\u30c8\u30bf\u30fc\u30b2\u30c3\u30c8\u306eSG\u306b\u5bfe\u3057\u3066Lambda\u306eSG\u304b\u3089\u306eNFS\uff082049\uff09\u901a\u4fe1\u3092\u8a31\u53ef<\/p>\n\n\n\n
aws ec2 authorize-security-group-ingress \\\n\u00a0 --group-id <MOUNT_TARGET_SECURITY_GROUP_ID> \\\n\u00a0 --protocol tcp \\\n\u00a0 --port 2049 \\\n\u00a0 --source-group <LAMBDA_SECURITY_GROUP_ID> \\\n\u00a0 --region ap-northeast-1<\/code><\/pre>\n\n\n\n<\/span>\u2462IAM\u30ed\u30fc\u30eb\u306e\u6a29\u9650\u8a2d\u5b9a<\/strong><\/span><\/h3>\n\n\n\nLambda\u306e\u5b9f\u884c\u30ed\u30fc\u30eb\u306b\u5bfe\u3057\u3001S3 Files\u306e\u63a5\u7d9a\u6a29\u9650\u304a\u3088\u3073\u5bfe\u8c61S3\u30d0\u30b1\u30c3\u30c8\u3078\u306e\u30a2\u30af\u30bb\u30b9\u6a29\u9650\uff08s3:GetObject\u306a\u3069\uff09\u3092\u4ed8\u4e0e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u30dd\u30ea\u30b7\u30fc\u4f8b\uff08<\/strong>policy.json<\/strong>\uff09\uff1a<\/p>\n\n\n\nJSON<\/p>\n\n\n\n
{
\"Version\": \"2012-10-17\",
\"Statement\": [
{
\"Sid\": \"AllowEFSMountPermissions\",
\"Effect\": \"Allow\",
\"Action\": [
\"elasticfilesystem:ClientMount\",
\"elasticfilesystem:ClientWrite\",
\"elasticfilesystem:ClientRootAccess\",
\"elasticfilesystem:DescribeMountTargets\",
\"elasticfilesystem:DescribeFileSystems\"
],
\"Resource\": \"*\"
},
{
\"Sid\": \"AllowS3Access\",
\"Effect\": \"Allow\",
\"Action\": [
\"s3:GetObject\",
\"s3:PutObject\",
\"s3:ListBucket\"
],
\"Resource\": [
\"arn:aws:s3:::infrastructurecomposer\",
\"arn:aws:s3:::infrastructurecomposer\/*\"
]
},
{
\"Sid\": \"AllowS3ExpressMountPermissions\",
\"Effect\": \"Allow\",
\"Action\": [
\"s3express:CreateSession\"
],
\"Resource\": \"*\"
},
{
\"Sid\": \"AllowVPCAccessForS3Files\",
\"Effect\": \"Allow\",
\"Action\": [
\"ec2:CreateNetworkInterface\",
\"ec2:DescribeNetworkInterfaces\",
\"ec2:DeleteNetworkInterface\"
],
\"Resource\": \"*\"
},
{
\"Sid\": \"AllowCloudWatchLogs\",
\"Effect\": \"Allow\",
\"Action\": [
\"logs:CreateLogGroup\",
\"logs:CreateLogStream\",
\"logs:PutLogEvents\"
],
\"Resource\": \"arn:aws:logs:*:*:*\"
}
]
}
<\/code><\/pre>\n\n\n\n<\/span>\u2463Lambda\u306e\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u8a2d\u5b9a<\/strong><\/span><\/h3>\n\n\n\n![\"Lambda\u306e\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u8a2d\u5b9a\"](\"https:\/\/baresupport.jp\/blog\/wp-content\/uploads\/2026\/09\/image-3.png\")
<\/figure>\n\n\n\nLambda\u95a2\u6570\u306b\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\uff08S3 Files\uff09\u3092\u7d10\u4ed8\u3051\u307e\u3059\u3002AWS\u30b3\u30f3\u30bd\u30fc\u30eb\u307e\u305f\u306fAWS CLI\u3092\u7528\u3044\u3066\u8a2d\u5b9a\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\n- \u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\/\u30a2\u30af\u30bb\u30b9\u30dd\u30a4\u30f3\u30c8<\/strong>\uff1a\u5148\u307b\u3069\u4f5c\u6210\u3057\u305fS3 Files\u306e\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u304a\u3088\u3073\u30a2\u30af\u30bb\u30b9\u30dd\u30a4\u30f3\u30c8\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/li>\n\n\n\n
- \u30ed\u30fc\u30ab\u30eb\u30de\u30a6\u30f3\u30c8\u30d1\u30b9<\/strong>\uff1aLambda\u30b3\u30f3\u30c6\u30ca\u5185\u3067\u306e\u30de\u30a6\u30f3\u30c8\u5148\u3068\u3057\u3066\/mnt\/data<\/strong>\u3092\u6307\u5b9a\u3057\u307e\u3059\uff08\u203bLambda\u306e\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u30de\u30a6\u30f3\u30c8\u30d1\u30b9\u306f\u5fc5\u305a\/mnt\/\u3067\u59cb\u3081\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\uff09\u3002<\/li>\n<\/ul>\n\n\n\n
AWS CLI<\/strong>\u3067\u8a2d\u5b9a\u3059\u308b\u5834\u5408\u306e\u30b3\u30de\u30f3\u30c9\u4f8b\uff1a<\/strong><\/p>\n\n\n\nBash<\/p>\n\n\n\n
aws lambda update-function-configuration \\\n\u00a0 --function-name prd-log-processor-s3stream \\\n\u00a0 --file-system-configs '[{\n\u00a0\u00a0\u00a0\u00a0\u00a0 \"Arn\": \"arn:aws:elasticfilesystem:ap-northeast-1:440022655707:access-point\/fsap-0c98f3fa1d57181e4\",\n\u00a0\u00a0\u00a0\u00a0\u00a0 \"LocalMountPath\": \"\/mnt\/data\"\n\u00a0 }]' \\\n\u00a0 --region ap-northeast-1<\/code><\/pre>\n\n\n\n<\/span>S3 Files\u306e\u30a2\u30af\u30bb\u30b9\u30dd\u30a4\u30f3\u30c8\u3068Lambda\u306e\u30d1\u30b9\u306e\u95a2\u4fc2<\/strong><\/span><\/h2>\n\n\n\n\u3053\u3053\u307e\u3067\u3067\u8a2d\u5b9a\u3057\u305f\u300cS3 Files\u306e\u30a2\u30af\u30bb\u30b9\u30dd\u30a4\u30f3\u30c8\u300d\u3068\u300cLambda\u5185\u306e\u30de\u30a6\u30f3\u30c8\u30d1\u30b9\uff08\/mnt\/data\uff09\u300d\u304c\u3069\u306e\u3088\u3046\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u306e\u304b\u3092\u6574\u7406\u3057\u307e\u3059\u3002<\/p>\n\n\n\n\u9805\u76ee<\/strong><\/td>\u6982\u8981<\/strong><\/td>\u4eca\u56de\u306e\u8a2d\u5b9a\u4f8b<\/strong><\/td><\/tr>S3 Files<\/strong>\u30a2\u30af\u30bb\u30b9\u30dd\u30a4\u30f3\u30c8<\/strong><\/td>| S3\u30d0\u30b1\u30c3\u30c8\u5185\u306e\u3069\u306e\u30d5\u30a9\u30eb\u30c0\uff08\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\uff09\u3092\u30eb\u30fc\u30c8\u3068\u3057\u3066\u516c\u958b\u3059\u308b\u304b\u3092\u5b9a\u7fa9\u3059\u308b\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8<\/td> | \/lambda\u30d5\u30a9\u30eb\u30c0\u3092\u8d77\u70b9\u3068\u3059\u308b\u30a2\u30af\u30bb\u30b9\u30dd\u30a4\u30f3\u30c8<\/td><\/tr> | Lambda<\/strong>\u306e\u30ed\u30fc\u30ab\u30eb\u30de\u30a6\u30f3\u30c8\u30d1\u30b9<\/strong><\/td>| Lambda\u95a2\u6570\u306e\u30b3\u30f3\u30c6\u30ca\u5185\u3067\u3001\u3069\u306e\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\uff08\u30d1\u30b9\uff09\u3068\u3057\u3066\u30de\u30a6\u30f3\u30c8\u3059\u308b\u304b\u3092\u5b9a\u7fa9\u3059\u308b\u8a2d\u5b9a<\/td> | \/mnt\/data<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n \u3010\u5b9f\u969b\u306e\u30d1\u30b9\u306e\u5bfe\u5fdc\u95a2\u4fc2\u3011<\/strong> S3\u30d0\u30b1\u30c3\u30c8\u306e\u5bfe\u8c61\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\uff08\u4f8b\uff1a\/lambda\/\uff09\u306e\u4e2d\u306b\u3042\u308b\u30d5\u30a1\u30a4\u30eb\uff08\u4f8b: large_dataset2.csv\uff09\u306f\u3001Lambda\u30b3\u30f3\u30c6\u30ca\u5185\u3067\u306f\/mnt\/data\/large_dataset2.csv<\/strong>\u3068\u3057\u3066\u53c2\u7167\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30ed\u30fc\u30ab\u30eb\u30c7\u30a3\u30b9\u30af\u4e0a\u306e\u30d5\u30a1\u30a4\u30eb\u3068\u540c\u69d8\u306b\u8aad\u307f\u8fbc\u307f\u30fb\u51e6\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<\/span>Lambda\u95a2\u6570\u306e\u5b9f\u88c5<\/strong><\/span><\/h2>\n\n\n\nS3 Files\u306b\u3088\u3063\u3066Lambda\u306e\u30b3\u30f3\u30c6\u30ca\u5185\uff08\/mnt\/data\uff09\u306b\u30de\u30a6\u30f3\u30c8\u3055\u308c\u305f\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u304b\u3089\u3001\u901a\u5e38\u306e\u30d5\u30a1\u30a4\u30eb\u8aad\u307f\u8fbc\u307f\u3068\u540c\u69d8\u306bCSV\u3092\u30d1\u30fc\u30b9\u3057\u307e\u3059\u3002API\u7d4c\u7531\u3067\u30d5\u30a1\u30a4\u30eb\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b\u30b3\u30fc\u30c9\u3092\u8a18\u8ff0\u3059\u308b\u5fc5\u8981\u304c\u306a\u304f\u3001\u30b3\u30fc\u30c9\u304c\u30b7\u30f3\u30d7\u30eb\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n lambda_function.py<\/strong>\uff1a<\/strong><\/p>\n\n\n\nPython<\/p>\n\n\n\n import json\nimport csv\nfrom collections import Counter\n\n# S3 Files\u3067\u30de\u30a6\u30f3\u30c8\u3055\u308c\u305f\u30ed\u30fc\u30ab\u30eb\u30d1\u30b9\nFILE_PATH = \"\/mnt\/data\/large_dataset.csv\"\n\ndef lambda_handler(event, context):\n\u00a0\u00a0\u00a0 try:\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 total_records = 0\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 status_code_counts = Counter()\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 total_response_time = 0\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 # \u901a\u5e38\u306e\u30d5\u30a1\u30a4\u30ebIO\u3068\u3057\u3066\u5b89\u5168\u306b\u8aad\u307f\u8fbc\u307f\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 with open(FILE_PATH, mode='r', encoding='utf-8') as f:\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 reader = csv.DictReader(f)\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 for row in reader:\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 total_records += 1\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 status = row.get('status_code', 'UNKNOWN')\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 status_code_counts[status] += 1\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 try:\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 total_response_time += float(row.get('response_time_ms', 0))\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 except ValueError:\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 pass\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 avg_response_time = (\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 round(total_response_time \/ total_records, 2) if total_records > 0 else 0\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 )\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 return {\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 'statusCode': 200,\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 'body': json.dumps({\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 'message': 'Successfully processed access log via S3 Files mount',\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 'summary': {\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 'total_records_processed': total_records,\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 'average_response_time_ms': avg_response_time,\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 'status_code_breakdown': dict(status_code_counts)\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }, ensure_ascii=False)\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }\n\n\u00a0\u00a0\u00a0 except Exception as e:\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 return {\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 'statusCode': 500,\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 'body': json.dumps({'error': str(e)})\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }<\/code><\/pre>\n\n\n\n
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