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add v1 and v2 client for diff sdks, break out client
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| package elasticspot | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "fmt" | ||
| "os" | ||
|
|
||
| "github.com/aws/aws-sdk-go/aws" | ||
| "github.com/aws/aws-sdk-go/service/ec2" | ||
| ) | ||
|
|
||
| // Client will create a new client for version 1 of the AWS SDK. | ||
| type Client struct { | ||
| EC2API EC2API | ||
| } | ||
|
|
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| type EC2API interface { | ||
| DescribeAddresses(input *ec2.DescribeAddressesInput) (*ec2.DescribeAddressesOutput, error) | ||
| AssociateAddress(input *ec2.AssociateAddressInput) (*ec2.AssociateAddressOutput, error) | ||
| DescribeInstances(input *ec2.DescribeInstancesInput) (*ec2.DescribeInstancesOutput, error) | ||
| } | ||
|
|
||
| func (c *Client) AssociateIP(ctx context.Context, ip, instanceID string) (*AssociateResponse, error) { | ||
| instance, err := c.getInstanceById(instanceID) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error fetching instance: %w", err) | ||
| } | ||
|
|
||
| if *instance.PublicIpAddress == ip { | ||
| return &AssociateResponse{AlreadyAssociated: true}, nil | ||
| } | ||
|
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| address, err := c.getAddressForIp(ip) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error fetching elastic ip address: %w", err) | ||
| } | ||
|
|
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| assocRes, err := c.EC2API.AssociateAddress(&ec2.AssociateAddressInput{ | ||
| AllocationId: address.AllocationId, | ||
| InstanceId: aws.String(instanceID), | ||
| }) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error associating elastic ip address with %q %w", instanceID, err) | ||
| } | ||
|
|
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| return &AssociateResponse{ | ||
| AllocationID: *address.AllocationId, | ||
| AssociationID: *assocRes.AssociationId, | ||
| }, nil | ||
| } | ||
|
|
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| func (a *Client) getInstanceById(id string) (*ec2.Instance, error) { | ||
| instances, err := a.EC2API.DescribeInstances(&ec2.DescribeInstancesInput{ | ||
| Filters: []*ec2.Filter{ | ||
| { | ||
| Name: aws.String("instance-id"), | ||
| Values: aws.StringSlice([]string{id}), | ||
| }, | ||
| }, | ||
| }) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("DescribeInstances failed: %w", err) | ||
| } | ||
|
|
||
| if instances == nil || len(instances.Reservations) == 0 || len(instances.Reservations[0].Instances) == 0 { | ||
| return nil, errors.New("no instance found for the given id") | ||
| } | ||
|
|
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| return instances.Reservations[0].Instances[0], nil | ||
| } | ||
|
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| func (a *Client) getAddressForIp(ip string) (*ec2.Address, error) { | ||
| result, err := a.EC2API.DescribeAddresses(&ec2.DescribeAddressesInput{ | ||
| Filters: []*ec2.Filter{ | ||
| { | ||
| Name: aws.String("domain"), | ||
| Values: aws.StringSlice([]string{"vpc"}), | ||
| }, | ||
| }, | ||
| PublicIps: []*string{aws.String(ip)}, | ||
| }) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| if len(result.Addresses) == 0 { | ||
| return nil, fmt.Errorf("elastic ip address not found in region %q", os.Getenv("AWS_REGION")) | ||
| } | ||
|
|
||
| return result.Addresses[0], nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| package elasticspot | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "fmt" | ||
| "os" | ||
|
|
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| ec2v2 "github.com/aws/aws-sdk-go-v2/service/ec2" | ||
| "github.com/aws/aws-sdk-go-v2/service/ec2/types" | ||
| "github.com/aws/aws-sdk-go/aws" | ||
| ) | ||
|
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| type AssociateResponse struct { | ||
| AlreadyAssociated bool | ||
| AllocationID string | ||
| AssociationID string | ||
| } | ||
|
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| // ClientV2 will create a new client for version 2 of the AWS SDK. | ||
| type ClientV2 struct { | ||
| EC2API EC2APIV2 | ||
| } | ||
|
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| type EC2APIV2 interface { | ||
| DescribeAddresses(ctx context.Context, params *ec2v2.DescribeAddressesInput, optFns ...func(*ec2v2.Options)) (*ec2v2.DescribeAddressesOutput, error) | ||
| AssociateAddress(ctx context.Context, params *ec2v2.AssociateAddressInput, optFns ...func(*ec2v2.Options)) (*ec2v2.AssociateAddressOutput, error) | ||
| DescribeInstances(ctx context.Context, params *ec2v2.DescribeInstancesInput, optFns ...func(*ec2v2.Options)) (*ec2v2.DescribeInstancesOutput, error) | ||
| } | ||
|
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| func (a *ClientV2) AssociateIP(ctx context.Context, ip string, instanceID string) (*AssociateResponse, error) { | ||
| instance, err := a.getInstanceById(ctx, instanceID) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error fetching instance: %w", err) | ||
| } | ||
|
|
||
| if *instance.PublicIpAddress == ip { | ||
| return &AssociateResponse{AlreadyAssociated: true}, nil | ||
| } | ||
|
|
||
| address, err := a.getAddressForIp(ctx, ip) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error fetching elastic ip address: %w", err) | ||
| } | ||
|
|
||
| assocRes, err := a.EC2API.AssociateAddress(ctx, &ec2v2.AssociateAddressInput{ | ||
| AllocationId: address.AllocationId, | ||
| InstanceId: aws.String(instanceID), | ||
| }) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error associating elastic ip address with %q %w", instanceID, err) | ||
| } | ||
|
|
||
| return &AssociateResponse{ | ||
| AllocationID: *address.AllocationId, | ||
| AssociationID: *assocRes.AssociationId, | ||
| }, nil | ||
| } | ||
|
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||
| func (a *ClientV2) getInstanceById(ctx context.Context, id string) (*types.Instance, error) { | ||
| instances, err := a.EC2API.DescribeInstances(ctx, &ec2v2.DescribeInstancesInput{ | ||
| Filters: []types.Filter{ | ||
| { | ||
| Name: aws.String("instance-id"), | ||
| Values: []string{id}, | ||
| }, | ||
| }, | ||
| }) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("DescribeInstances failed: %w", err) | ||
| } | ||
|
|
||
| if instances == nil || len(instances.Reservations) == 0 || len(instances.Reservations[0].Instances) == 0 { | ||
| return nil, errors.New("no instance found for the given id") | ||
| } | ||
|
|
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| return &instances.Reservations[0].Instances[0], nil | ||
| } | ||
|
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| func (c *ClientV2) getAddressForIp(ctx context.Context, ip string) (*types.Address, error) { | ||
| result, err := c.EC2API.DescribeAddresses(ctx, &ec2v2.DescribeAddressesInput{ | ||
| Filters: []types.Filter{ | ||
| { | ||
| Name: aws.String("domain"), | ||
| Values: []string{"vpc"}, | ||
| }, | ||
| }, | ||
| PublicIps: []string{ip}, | ||
| }) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| if len(result.Addresses) == 0 { | ||
| return nil, fmt.Errorf("elastic ip address not found in region %q", os.Getenv("AWS_REGION")) | ||
| } | ||
|
|
||
| return &result.Addresses[0], nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,33 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "os" | ||
|
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| "github.com/aws/aws-lambda-go/lambda" | ||
| "github.com/aws/aws-sdk-go-v2/config" | ||
| "github.com/aws/aws-sdk-go-v2/service/ec2" | ||
| "github.com/nickfiggins/elasticspot" | ||
| ) | ||
|
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| var handler elasticspot.HandleFunc | ||
|
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| func init() { | ||
| ctx := context.Background() | ||
| cfg, err := config.LoadDefaultConfig(ctx) | ||
| if err != nil { | ||
| panic(fmt.Sprintf("error loading default config: %v", err)) | ||
| } | ||
|
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| client := ec2.NewFromConfig(cfg) | ||
| elasticIP := os.Getenv("ELASTIC_IP") | ||
| if len(elasticIP) == 0 { | ||
| panic("Elastic IP has not been set.") | ||
| } | ||
| handler = elasticspot.HandleV2(client, elasticIP) | ||
| } | ||
|
|
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| func main() { | ||
| lambda.Start(handler) | ||
| } |
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