/
kops.go
89 lines (74 loc) · 2.38 KB
/
kops.go
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package kops
import (
"context"
"fmt"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/service/ec2"
ec2types "github.com/aws/aws-sdk-go-v2/service/ec2/types"
"github.com/kris-nova/logger"
"github.com/pkg/errors"
"k8s.io/kops/upup/pkg/fi/cloudup/awsup"
api "github.com/weaveworks/eksctl/pkg/apis/eksctl.io/v1alpha5"
"github.com/weaveworks/eksctl/pkg/awsapi"
"github.com/weaveworks/eksctl/pkg/vpc"
)
// Wrapper for interacting with a kops cluster
type Wrapper struct {
clusterName string
cloud awsup.AWSCloud
}
// NewWrapper constructs a kops wrapper for a given EKS cluster config and kops cluster
func NewWrapper(region, kopsClusterName string) (*Wrapper, error) {
cloud, err := awsup.NewAWSCloud(region, nil)
if err != nil {
return nil, err
}
return &Wrapper{kopsClusterName, cloud}, nil
}
func (k *Wrapper) topologyOf(s ec2types.Subnet) api.SubnetTopology {
for _, t := range s.Tags {
if *t.Key == "SubnetType" && *t.Value == "Private" {
return api.SubnetTopologyPrivate
}
}
return api.SubnetTopologyPublic // "Utility", "Public" or unspecified
}
// UseVPC finds VPC and subnets that give kops cluster uses and add those to EKS cluster config
func (k *Wrapper) UseVPC(ctx context.Context, ec2API awsapi.EC2, spec *api.ClusterConfig) error {
spec.VPC.CIDR = nil // ensure to reset the CIDR
clusterTag := fmt.Sprintf("kubernetes.io/cluster/%s", k.clusterName)
output, err := ec2API.DescribeSubnets(ctx, &ec2.DescribeSubnetsInput{
Filters: []ec2types.Filter{
{
Name: aws.String(fmt.Sprintf("tag:%s", clusterTag)),
Values: []string{"owned"},
},
},
})
if err != nil {
return err
}
var (
publicSubnets []ec2types.Subnet
privateSubnets []ec2types.Subnet
)
for _, subnet := range output.Subnets {
switch k.topologyOf(subnet) {
case api.SubnetTopologyPublic:
publicSubnets = append(publicSubnets, subnet)
case api.SubnetTopologyPrivate:
privateSubnets = append(privateSubnets, subnet)
}
}
if err := vpc.ImportSubnets(ctx, ec2API, spec, spec.VPC.Subnets.Private, privateSubnets, nil); err != nil {
return err
}
if err := vpc.ImportSubnets(ctx, ec2API, spec, spec.VPC.Subnets.Public, publicSubnets, nil); err != nil {
return err
}
logger.Debug("subnets = %#v", spec.VPC.Subnets)
if err := spec.HasSufficientSubnets(); err != nil {
return errors.Wrapf(err, "using VPC from kops cluster %q", k.clusterName)
}
return nil
}