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managed_launch_template.go
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/
managed_launch_template.go
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package builder
import (
"context"
"fmt"
"github.com/pkg/errors"
"github.com/weaveworks/goformation/v4/cloudformation/cloudformation"
gfnec2 "github.com/weaveworks/goformation/v4/cloudformation/ec2"
gfnt "github.com/weaveworks/goformation/v4/cloudformation/types"
api "github.com/weaveworks/eksctl/pkg/apis/eksctl.io/v1alpha5"
)
func (m *ManagedNodeGroupResourceSet) makeLaunchTemplateData(ctx context.Context) (*gfnec2.LaunchTemplate_LaunchTemplateData, error) {
mng := m.nodeGroup
launchTemplateData := &gfnec2.LaunchTemplate_LaunchTemplateData{
TagSpecifications: makeTags(mng.NodeGroupBase, m.clusterConfig.Metadata),
MetadataOptions: makeMetadataOptions(mng.NodeGroupBase),
}
if mng.CapacityReservation != nil {
valueOrNil := func(value *string) *gfnt.Value {
if value != nil {
return gfnt.NewString(*value)
}
return nil
}
launchTemplateData.CapacityReservationSpecification = &gfnec2.LaunchTemplate_CapacityReservationSpecification{}
launchTemplateData.CapacityReservationSpecification.CapacityReservationPreference = valueOrNil(mng.CapacityReservation.CapacityReservationPreference)
if mng.CapacityReservation.CapacityReservationTarget != nil {
launchTemplateData.CapacityReservationSpecification.CapacityReservationTarget = &gfnec2.LaunchTemplate_CapacityReservationTarget{
CapacityReservationId: valueOrNil(mng.CapacityReservation.CapacityReservationTarget.CapacityReservationID),
CapacityReservationResourceGroupArn: valueOrNil(mng.CapacityReservation.CapacityReservationTarget.CapacityReservationResourceGroupARN),
}
}
}
userData, err := m.bootstrapper.UserData()
if err != nil {
return nil, err
}
if userData != "" {
launchTemplateData.UserData = gfnt.NewString(userData)
}
securityGroupIDs := m.vpcImporter.SecurityGroups()
for _, sgID := range mng.SecurityGroups.AttachIDs {
securityGroupIDs = append(securityGroupIDs, gfnt.NewString(sgID))
}
if mng.AMI != "" {
launchTemplateData.ImageId = gfnt.NewString(mng.AMI)
}
if mng.SSH != nil && api.IsSetAndNonEmptyString(mng.SSH.PublicKeyName) {
launchTemplateData.KeyName = gfnt.NewString(*mng.SSH.PublicKeyName)
if *mng.SSH.Allow {
vpcID := m.vpcImporter.VPC()
sshRef := m.newResource("SSH", &gfnec2.SecurityGroup{
GroupName: gfnt.MakeFnSubString(fmt.Sprintf("${%s}-remoteAccess", gfnt.StackName)),
VpcId: vpcID,
SecurityGroupIngress: makeSSHIngressRules(mng.NodeGroupBase, m.clusterConfig.VPC.CIDR.String(), fmt.Sprintf("managed worker nodes in group %s", mng.Name)),
GroupDescription: gfnt.NewString("Allow SSH access"),
})
securityGroupIDs = append(securityGroupIDs, sshRef)
}
}
if api.IsEnabled(mng.EFAEnabled) {
// we don't want to touch the network interfaces at all if we have a
// managed nodegroup, unless EFA is enabled
desc := "worker nodes in group " + m.nodeGroup.Name
efaSG := m.addEFASecurityGroup(m.vpcImporter.VPC(), m.clusterConfig.Metadata.Name, desc)
securityGroupIDs = append(securityGroupIDs, efaSG)
if err := buildNetworkInterfaces(ctx, launchTemplateData, mng.InstanceTypeList(), true, securityGroupIDs, m.ec2API); err != nil {
return nil, errors.Wrap(err, "couldn't build network interfaces for launch template data")
}
if mng.Placement == nil {
groupName := m.newResource("NodeGroupPlacementGroup", &gfnec2.PlacementGroup{
Strategy: gfnt.NewString("cluster"),
})
launchTemplateData.Placement = &gfnec2.LaunchTemplate_Placement{
GroupName: groupName,
}
}
} else {
launchTemplateData.SecurityGroupIds = gfnt.NewSlice(securityGroupIDs...)
}
if mng.EBSOptimized != nil {
launchTemplateData.EbsOptimized = gfnt.NewBoolean(*mng.EBSOptimized)
}
if mng.Placement != nil {
launchTemplateData.Placement = &gfnec2.LaunchTemplate_Placement{
GroupName: gfnt.NewString(mng.Placement.GroupName),
}
}
if mng.EnableDetailedMonitoring != nil {
launchTemplateData.Monitoring = &gfnec2.LaunchTemplate_Monitoring{
Enabled: gfnt.NewBoolean(*mng.EnableDetailedMonitoring),
}
}
launchTemplateData.BlockDeviceMappings = makeBlockDeviceMappings(mng.NodeGroupBase)
return launchTemplateData, nil
}
func makeSSHIngressRules(n *api.NodeGroupBase, vpcCIDR, description string) []gfnec2.SecurityGroup_Ingress {
var sgIngressRules []gfnec2.SecurityGroup_Ingress
if *n.SSH.Allow {
if len(n.SSH.SourceSecurityGroupIDs) > 0 {
for _, sgID := range n.SSH.SourceSecurityGroupIDs {
sgIngressRules = append(sgIngressRules, gfnec2.SecurityGroup_Ingress{
FromPort: sgPortSSH,
ToPort: sgPortSSH,
IpProtocol: sgProtoTCP,
SourceSecurityGroupId: gfnt.NewString(sgID),
})
}
} else {
makeSSHIngress := func(cidrIP *gfnt.Value, sshDesc string) gfnec2.SecurityGroup_Ingress {
return gfnec2.SecurityGroup_Ingress{
FromPort: sgPortSSH,
ToPort: sgPortSSH,
IpProtocol: sgProtoTCP,
CidrIp: cidrIP,
Description: gfnt.NewString(sshDesc),
}
}
sshDesc := "Allow SSH access to " + description
if n.PrivateNetworking {
allInternalIPv4 := gfnt.NewString(vpcCIDR)
sgIngressRules = []gfnec2.SecurityGroup_Ingress{makeSSHIngress(allInternalIPv4, sshDesc+" (private, only inside VPC)")}
} else {
sgIngressRules = append(sgIngressRules,
makeSSHIngress(sgSourceAnywhereIPv4, sshDesc),
gfnec2.SecurityGroup_Ingress{
CidrIpv6: sgSourceAnywhereIPv6,
Description: gfnt.NewString(sshDesc),
IpProtocol: sgProtoTCP,
FromPort: sgPortSSH,
ToPort: sgPortSSH,
})
}
}
}
return sgIngressRules
}
func makeTags(ng *api.NodeGroupBase, meta *api.ClusterMeta) []gfnec2.LaunchTemplate_TagSpecification {
cfnTags := []cloudformation.Tag{
{
Key: gfnt.NewString("Name"),
Value: gfnt.NewString(generateNodeName(ng, meta)),
},
}
for k, v := range ng.Tags {
cfnTags = append(cfnTags, cloudformation.Tag{
Key: gfnt.NewString(k),
Value: gfnt.NewString(v),
})
}
var launchTemplateTagSpecs []gfnec2.LaunchTemplate_TagSpecification
launchTemplateTagSpecs = append(launchTemplateTagSpecs,
gfnec2.LaunchTemplate_TagSpecification{
ResourceType: gfnt.NewString("instance"),
Tags: cfnTags,
}, gfnec2.LaunchTemplate_TagSpecification{
ResourceType: gfnt.NewString("volume"),
Tags: cfnTags,
}, gfnec2.LaunchTemplate_TagSpecification{
ResourceType: gfnt.NewString("network-interface"),
Tags: cfnTags,
})
return launchTemplateTagSpecs
}