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package ec2metadata
import (
"path"
"github.com/aws/aws-sdk-go/aws/request"
)
// GetMetadata uses the path provided to request
func (c *Client) GetMetadata(p string) (string, error) {
op := &request.Operation{
Name: "GetMetadata",
HTTPMethod: "GET",
HTTPPath: path.Join("/", "meta-data", p),
}
output := &metadataOutput{}
req := request.New(c.Service.ServiceInfo, c.Service.Handlers, c.Service.Retryer, op, nil, output)
return output.Content, req.Send()
}
// Region returns the region the instance is running in.
func (c *Client) Region() (string, error) {
resp, err := c.GetMetadata("placement/availability-zone")
if err != nil {
return "", err
}
// returns region without the suffix. Eg: us-west-2a becomes us-west-2
return resp[:len(resp)-1], nil
}
// Available returns if the application has access to the EC2 Metadata service.
// Can be used to determine if application is running within an EC2 Instance and
// the metadata service is available.
func (c *Client) Available() bool {
if _, err := c.GetMetadata("instance-id"); err != nil {
return false
}
return true
}
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