CreateInstancev2
CreateInstancev2.go
This example creates a T2-Micro instance from the Amazon EC2 image ami-e7527ed7 and attaches a tag to the instance.
go run CreateInstancev2.go -n TAG-NAME -v TAG-VALUE
- TAG-NAME is the name of the tag to attach to the instance.
- TAG-VALUE is the value of the tag to attach to the instance.
The unit test accepts similar values in config.json.
Source code
// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX - License - Identifier: Apache - 2.0
package main
import (
"context"
"flag"
"fmt"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/config"
"github.com/aws/aws-sdk-go-v2/service/ec2"
"github.com/aws/aws-sdk-go-v2/service/ec2/types"
)
// EC2CreateInstanceAPI defines the interface for the RunInstances and CreateTags functions.
// We use this interface to test the functions using a mocked service.
type EC2CreateInstanceAPI interface {
RunInstances(ctx context.Context,
params *ec2.RunInstancesInput,
optFns ...func(*ec2.Options)) (*ec2.RunInstancesOutput, error)
CreateTags(ctx context.Context,
params *ec2.CreateTagsInput,
optFns ...func(*ec2.Options)) (*ec2.CreateTagsOutput, error)
}
// MakeInstance creates an Amazon Elastic Compute Cloud (Amazon EC2) instance.
// Inputs:
// c is the context of the method call, which includes the AWS Region.
// api is the interface that defines the method call.
// input defines the input arguments to the service call.
// Output:
// If success, a RunInstancesOutput object containing the result of the service call and nil.
// Otherwise, nil and an error from the call to RunInstances.
func MakeInstance(c context.Context, api EC2CreateInstanceAPI, input *ec2.RunInstancesInput) (*ec2.RunInstancesOutput, error) {
return api.RunInstances(c, input)
}
// MakeTags creates tags for an Amazon Elastic Compute Cloud (Amazon EC2) instance.
// Inputs:
// c is the context of the method call, which includes the AWS Region.
// api is the interface that defines the method call.
// input defines the input arguments to the service call.
// Output:
// If success, a CreateTagsOutput object containing the result of the service call and nil.
// Otherwise, nil and an error from the call to CreateTags.
func MakeTags(c context.Context, api EC2CreateInstanceAPI, input *ec2.CreateTagsInput) (*ec2.CreateTagsOutput, error) {
return api.CreateTags(c, input)
}
func main() {
name := flag.String("n", "", "The name of the tag to attach to the instance")
value := flag.String("v", "", "The value of the tag to attach to the instance")
flag.Parse()
if *name == "" || *value == "" {
fmt.Println("You must supply a name and value for the tag (-n NAME -v VALUE)")
return
}
cfg, err := config.LoadDefaultConfig(context.TODO())
if err != nil {
panic("configuration error, " + err.Error())
}
client := ec2.NewFromConfig(cfg)
input := &ec2.RunInstancesInput{
ImageId: aws.String("ami-e7527ed7"),
InstanceType: types.InstanceTypeT2Micro,
MinCount: 1,
MaxCount: 1,
}
result, err := MakeInstance(context.TODO(), client, input)
if err != nil {
fmt.Println("Got an error creating an instance:")
fmt.Println(err)
return
}
tagInput := &ec2.CreateTagsInput{
Resources: []string{*result.Instances[0].InstanceId},
Tags: []types.Tag{
{
Key: name,
Value: value,
},
},
}
_, err = MakeTags(context.TODO(), client, tagInput)
if err != nil {
fmt.Println("Got an error tagging the instance:")
fmt.Println(err)
return
}
fmt.Println("Created tagged instance with ID " + *result.Instances[0].InstanceId)
}
See the complete example in GitHub.
Last modified January 15, 2021: Code Example Highlighting, Vairous Documentation Fixes (#1045) (495b900)