ekristen/aws-nuke

package resources

import (
    "context"

    "fmt"
    "time"

    "github.com/aws/aws-sdk-go/service/ec2"

    "github.com/ekristen/libnuke/pkg/registry"
    "github.com/ekristen/libnuke/pkg/resource"
    "github.com/ekristen/libnuke/pkg/types"

    "github.com/ekristen/aws-nuke/v3/pkg/nuke"
)

const EC2HostResource = "EC2Host"

func init() {
    registry.Register(&registry.Registration{
        Name:     EC2HostResource,
        Scope:    nuke.Account,
        Resource: &EC2Host{},
        Lister:   &EC2HostLister{},
    })
}

type EC2HostLister struct{}

func (l *EC2HostLister) List(_ context.Context, o interface{}) ([]resource.Resource, error) {
    opts := o.(*nuke.ListerOpts)

    svc := ec2.New(opts.Session)
    params := &ec2.DescribeHostsInput{}
    resources := make([]resource.Resource, 0)
    for {
        resp, err := svc.DescribeHosts(params)
        if err != nil {
            return nil, err
        }

        for _, host := range resp.Hosts {
            resources = append(resources, &EC2Host{
                svc:  svc,
                host: host,
            })
        }

        if resp.NextToken == nil {
            break
        }

        params = &ec2.DescribeHostsInput{
            NextToken: resp.NextToken,
        }
    }

    return resources, nil
}

type EC2Host struct {
    svc  *ec2.EC2
    host *ec2.Host
}

func (i *EC2Host) Filter() error {
    if *i.host.State == "released" {
        return fmt.Errorf("already released")
    }
    return nil
}

func (i *EC2Host) Remove(_ context.Context) error {
    params := &ec2.ReleaseHostsInput{
        HostIds: []*string{i.host.HostId},
    }

    _, err := i.svc.ReleaseHosts(params)
    if err != nil {
        return err
    }
    return nil
}

func (i *EC2Host) Properties() types.Properties {
    properties := types.NewProperties()
    properties.Set("Identifier", i.host.HostId)
    properties.Set("HostInstanceFamily", i.host.HostProperties.InstanceFamily)
    properties.Set("HostCores", i.host.HostProperties.Cores)
    properties.Set("HostState", i.host.State)
    properties.Set("AllocationTime", i.host.AllocationTime.Format(time.RFC3339))

    for _, tagValue := range i.host.Tags {
        properties.SetTag(tagValue.Key, tagValue.Value)
    }

    return properties
}

func (i *EC2Host) String() string {
    return *i.host.HostId
}