README.md in fluent-plugin-ec2-metadata-0.0.10 vs README.md in fluent-plugin-ec2-metadata-0.0.11

@@ -22,16 +22,19 @@
       type ec2_metadata
 
       aws_key_id  YOUR_AWS_KEY_ID
       aws_sec_key YOUR_AWS_SECRET/KEY
 
+      metadata_refresh_seconds 300 # Optional, default 300 seconds
+
       output_tag ${instance_id}.${tag}
       <record>
         hostname      ${tagset_name}
         instance_id   ${instance_id}
         instance_type ${instance_type}
         az            ${availability_zone}
+        private_ip    ${private_ip}
         vpc_id        ${vpc_id}
         ami_id        ${image_id}
         account_id    ${account_id}
       </record>
     </match>
@@ -48,10 +51,11 @@
 i-28b5ee77.foo.bar {
   "hostname"      : "web0001",
   "instance_id"   : "i-28b5ee77",
   "instance_type" : "m1.large",
   "az"            : "us-west-1b",
+  "private_ip     : "10.21.34.200",
   "vpc_id"        : "vpc-25dab194",
   "account_id"    : "123456789",
   "image_id"      : "ami-123456",
   "message"       : "hello ec2!"
 }
@@ -63,14 +67,17 @@
       type ec2_metadata
 
       aws_key_id  YOUR_AWS_KEY_ID      
       aws_sec_key YOUR_AWS_SECRET/KEY
 
+      metadata_refresh_seconds 300 # Optional, default 300 seconds
+
       <record>
         hostname      ${tagset_name}
         instance_id   ${instance_id}
         instance_type ${instance_type}
+        private_ip    ${private_ip}
         az            ${availability_zone}
         vpc_id        ${vpc_id}
         ami_id        ${image_id}
         account_id    ${account_id}
       </record>
@@ -84,9 +91,10 @@
 * ${tag_parts} input tag splitted by '.'. you can use it like `${tag_parts[0]}` or `${tag_parts[-1]}`
 * ${instance_id} instance id
 * ${instance_type} instance type
 * ${availability_zone} availability zone
 * ${region} region
+* ${private_ip} private ip
 * ${mac} MAC address
 * ${vpc_id} vpc id
 * ${subnet_id} subnet id
 * ${account_id} account id
 * ${image_id} ami image id