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vendor/github.com/aws/aws-sdk-go/example/service/ec2/filterInstances/README.md

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+# Example
+
+This is an example using the AWS SDK for Go to list ec2 instances that match provided tag name filter.
+
+
+# Usage
+
+The example uses the bucket name provided, and lists all object keys in a bucket.
+
+```sh
+go run -tags example filter_ec2_by_tag.go <name_filter>
+```
+
+Output:
+```
+listing instances with tag vpn in: us-east-1
+[{
+  Instances: [{
+      AmiLaunchIndex: 0,
+      Architecture: "x86_64",
+      BlockDeviceMappings: [{
+          DeviceName: "/dev/xvda",
+          Ebs: {
+            AttachTime: 2016-07-06 18:04:53 +0000 UTC,
+            DeleteOnTermination: true,
+            Status: "attached",
+            VolumeId: "vol-xxxx"
+          }
+        }],
+      ...
+```

vendor/github.com/aws/aws-sdk-go/example/service/ec2/filterInstances/filter_ec2_by_tag.go

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+// +build example
+
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"strings"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/session"
+	"github.com/aws/aws-sdk-go/service/ec2"
+)
+
+// This example will list instances with a filter
+//
+// Usage:
+// filter_ec2_by_tag <name_filter>
+func main() {
+	sess := session.Must(session.NewSession())
+
+	nameFilter := os.Args[1]
+	awsRegion := "us-east-1"
+	svc := ec2.New(sess, &aws.Config{Region: aws.String(awsRegion)})
+	fmt.Printf("listing instances with tag %v in: %v\n", nameFilter, awsRegion)
+	params := &ec2.DescribeInstancesInput{
+		Filters: []*ec2.Filter{
+			{
+				Name: aws.String("tag:Name"),
+				Values: []*string{
+					aws.String(strings.Join([]string{"*", nameFilter, "*"}, "")),
+				},
+			},
+		},
+	}
+	resp, err := svc.DescribeInstances(params)
+	if err != nil {
+		fmt.Println("there was an error listing instances in", awsRegion, err.Error())
+		log.Fatal(err.Error())
+	}
+	fmt.Printf("%+v\n", *resp)
+}