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upgrade.go
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upgrade.go
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package nodegroup
import (
"context"
"fmt"
"strconv"
"strings"
"github.com/weaveworks/eksctl/pkg/eks/waiter"
ekstypes "github.com/aws/aws-sdk-go-v2/service/eks/types"
"github.com/aws/aws-sdk-go-v2/service/ssm"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/service/eks"
"github.com/blang/semver"
"github.com/kris-nova/logger"
"github.com/pkg/errors"
"github.com/weaveworks/goformation/v4"
"github.com/weaveworks/goformation/v4/cloudformation"
gfnec2 "github.com/weaveworks/goformation/v4/cloudformation/ec2"
gfneks "github.com/weaveworks/goformation/v4/cloudformation/eks"
gfnt "github.com/weaveworks/goformation/v4/cloudformation/types"
"github.com/weaveworks/eksctl/pkg/ami"
api "github.com/weaveworks/eksctl/pkg/apis/eksctl.io/v1alpha5"
"github.com/weaveworks/eksctl/pkg/cfn/builder"
"github.com/weaveworks/eksctl/pkg/cfn/manager"
"github.com/weaveworks/eksctl/pkg/managed"
"github.com/weaveworks/eksctl/pkg/version"
)
// UpgradeOptions contains options to configure nodegroup upgrades
type UpgradeOptions struct {
// NodeGroupName nodegroup name
NodegroupName string
// KubernetesVersion EKS version
KubernetesVersion string
// LaunchTemplateVersion launch template version
// valid only if a nodegroup was created with a launch template
LaunchTemplateVersion string
//ForceUpgrade enables force upgrade
ForceUpgrade bool
// ReleaseVersion AMI version of the EKS optimized AMI to use
ReleaseVersion string
// Wait for the upgrade to finish
Wait bool
// Stack to upgrade
Stack *manager.NodeGroupStack
}
func (m *Manager) Upgrade(ctx context.Context, options UpgradeOptions) error {
stacks, err := m.stackManager.ListNodeGroupStacksWithStatuses(ctx)
if err != nil {
return err
}
if options.KubernetesVersion != "" {
if _, err := semver.ParseTolerant(options.KubernetesVersion); err != nil {
return errors.Wrap(err, "invalid Kubernetes version")
}
}
nodegroupOutput, err := m.ctl.AWSProvider.EKS().DescribeNodegroup(ctx, &eks.DescribeNodegroupInput{
ClusterName: &m.cfg.Metadata.Name,
NodegroupName: &options.NodegroupName,
})
if err != nil {
if managed.IsNotFound(err) {
return fmt.Errorf("upgrade is only supported for managed nodegroups; could not find one with name %q", options.NodegroupName)
}
return err
}
switch nodegroupOutput.Nodegroup.Status {
case ekstypes.NodegroupStatusActive:
case ekstypes.NodegroupStatusUpdating:
return errors.New("nodegroup is currently being updated, please retry the command after the existing update is complete")
default:
return fmt.Errorf("nodegroup must be in %q state when upgrading a nodegroup; got state %q", ekstypes.NodegroupStatusActive, nodegroupOutput.Nodegroup.Status)
}
if stack := findStack(stacks, options.NodegroupName); stack != nil {
options.Stack = stack
return m.upgradeUsingStack(ctx, options, nodegroupOutput.Nodegroup)
}
return m.upgradeUsingAPI(ctx, options, nodegroupOutput.Nodegroup)
}
func (m *Manager) upgradeUsingAPI(ctx context.Context, options UpgradeOptions, nodegroup *ekstypes.Nodegroup) error {
input := &eks.UpdateNodegroupVersionInput{
ClusterName: &m.cfg.Metadata.Name,
Force: options.ForceUpgrade,
NodegroupName: &options.NodegroupName,
}
if options.LaunchTemplateVersion != "" {
lt := nodegroup.LaunchTemplate
if lt == nil || lt.Id == nil {
return errors.New("cannot update launch template version because the nodegroup is not configured to use one")
}
input.LaunchTemplate = &ekstypes.LaunchTemplateSpecification{
Version: &options.LaunchTemplateVersion,
}
input.LaunchTemplate.Id = nodegroup.LaunchTemplate.Id
}
usesCustomAMI, err := m.usesCustomAMIEKSNodeGroup(ctx, nodegroup)
if err != nil {
return err
}
if usesCustomAMI && (options.KubernetesVersion != "" || options.ReleaseVersion != "") {
return errors.New("cannot specify kubernetes-version or release-version when using a custom AMI")
}
if !usesCustomAMI {
if options.ReleaseVersion != "" {
input.ReleaseVersion = &options.ReleaseVersion
}
if options.KubernetesVersion != "" {
input.Version = &options.KubernetesVersion
} else {
// Use the current Kubernetes version
version, err := semver.ParseTolerant(*nodegroup.Version)
if err != nil {
return errors.Wrapf(err, "unexpected error parsing Kubernetes version %q", *nodegroup.Version)
}
input.Version = aws.String(fmt.Sprintf("%v.%v", version.Major, version.Minor))
}
}
upgradeResponse, err := m.ctl.AWSProvider.EKS().UpdateNodegroupVersion(ctx, input)
if err != nil {
return err
}
if upgradeResponse != nil {
logger.Debug("upgrade response for %q: %+v", options.NodegroupName, upgradeResponse.Update)
}
logger.Info("upgrade of nodegroup %q in progress", options.NodegroupName)
if options.Wait {
return m.waitForUpgrade(ctx, options, upgradeResponse.Update)
}
return nil
}
func (m *Manager) waitForUpgrade(ctx context.Context, options UpgradeOptions, update *ekstypes.Update) error {
logger.Info("waiting for upgrade of nodegroup %q to complete", options.NodegroupName)
updateWaiter := waiter.NewUpdateWaiter(m.ctl.AWSProvider.EKS())
if err := updateWaiter.Wait(ctx, &eks.DescribeUpdateInput{
Name: aws.String(m.cfg.Metadata.Name),
UpdateId: update.Id,
NodegroupName: &options.NodegroupName,
}, m.ctl.AWSProvider.WaitTimeout()); err != nil {
return err
}
logger.Info("nodegroup successfully upgraded")
return nil
}
// upgradeUsingStack upgrades nodegroup to the latest AMI release for the specified Kubernetes version, or
// the current Kubernetes version if the version isn't specified
// If options.LaunchTemplateVersion is set, it also upgrades the nodegroup to the specified launch template version
func (m *Manager) upgradeUsingStack(ctx context.Context, options UpgradeOptions, nodegroup *ekstypes.Nodegroup) error {
if options.KubernetesVersion != "" && options.ReleaseVersion != "" {
return errors.New("only one of kubernetes-version or release-version can be specified")
}
template, err := m.stackManager.GetManagedNodeGroupTemplate(ctx, manager.GetNodegroupOption{
Stack: options.Stack,
NodeGroupName: options.NodegroupName,
})
if err != nil {
return errors.Wrap(err, "error fetching nodegroup template")
}
stack, err := goformation.ParseJSON([]byte(template))
if err != nil {
return errors.Wrap(err, "unexpected error parsing nodegroup template")
}
ngResources := stack.GetAllEKSNodegroupResources()
ngResource, ok := ngResources[builder.ManagedNodeGroupResourceName]
if !ok {
return errors.New("unexpected error: failed to find nodegroup resource in nodegroup stack")
}
updateStack := func(stack *cloudformation.Template, wait bool) error {
bytes, err := stack.JSON()
if err != nil {
return err
}
if err := m.stackManager.UpdateNodeGroupStack(ctx, options.NodegroupName, string(bytes), true); err != nil {
return errors.Wrap(err, "error updating nodegroup stack")
}
return nil
}
requiresUpdate, err := m.requiresStackUpdate(ctx, options.NodegroupName)
if err != nil {
return err
}
if requiresUpdate {
logger.Info("updating nodegroup stack to a newer format before upgrading nodegroup version")
// always wait for the main stack update
if err := updateStack(stack, true); err != nil {
return err
}
}
if ngResource.ForceUpdateEnabled == nil || strings.ToLower(ngResource.ForceUpdateEnabled.String()) != strconv.FormatBool(options.ForceUpgrade) {
ngResource.ForceUpdateEnabled = gfnt.NewBoolean(options.ForceUpgrade)
logger.Info("setting ForceUpdateEnabled value to %t", options.ForceUpgrade)
if err := updateStack(stack, true); err != nil {
return err
}
}
ltResources := stack.GetAllEC2LaunchTemplateResources()
if options.LaunchTemplateVersion != "" {
// TODO validate launch template version
if len(ltResources) == 1 {
return errors.New("launch-template-version is only valid if a nodegroup is using an explicit launch template")
}
if ngResource.LaunchTemplate == nil || ngResource.LaunchTemplate.Id == nil {
return errors.New("nodegroup does not use a launch template")
}
}
usesCustomAMI, err := m.usesCustomAMIGFNNodeGroup(ctx, ltResources, ngResource)
if err != nil {
return err
}
if usesCustomAMI && (options.KubernetesVersion != "" || options.ReleaseVersion != "") {
return errors.New("cannot specify kubernetes-version or release-version when using a custom AMI")
}
if options.ReleaseVersion != "" {
ngResource.ReleaseVersion = gfnt.NewString(options.ReleaseVersion)
} else if !usesCustomAMI {
kubernetesVersion := options.KubernetesVersion
if kubernetesVersion == "" {
// Use the current Kubernetes version
version, err := semver.ParseTolerant(*nodegroup.Version)
if err != nil {
return errors.Wrapf(err, "unexpected error parsing Kubernetes version %q", *nodegroup.Version)
}
kubernetesVersion = fmt.Sprintf("%v.%v", version.Major, version.Minor)
}
latestReleaseVersion, err := m.getLatestReleaseVersion(ctx, kubernetesVersion, nodegroup)
if err != nil {
return err
} else if latestReleaseVersion != "" {
if err := m.updateReleaseVersion(latestReleaseVersion, options.LaunchTemplateVersion, nodegroup, ngResource); err != nil {
return err
}
}
if ngResource.ReleaseVersion == nil {
ngResource.Version = gfnt.NewString(kubernetesVersion)
logger.Info(fmt.Sprintf("will upgrade nodes to Kubernetes version: %s", ngResource.Version))
} else {
logger.Info(fmt.Sprintf("will upgrade nodes to release version: %s", ngResource.ReleaseVersion))
}
}
if options.LaunchTemplateVersion != "" {
ngResource.LaunchTemplate.Version = gfnt.NewString(options.LaunchTemplateVersion)
}
ngResource.ForceUpdateEnabled = gfnt.NewBoolean(options.ForceUpgrade)
logger.Debug("nodegroup resources for upgrade: %+v", ngResource)
logger.Info("upgrading nodegroup version")
if err := updateStack(stack, options.Wait); err != nil {
return err
}
logger.Info("nodegroup successfully upgraded")
return nil
}
func (m *Manager) updateReleaseVersion(latestReleaseVersion, launchTemplateVersion string, nodegroup *ekstypes.Nodegroup, ngResource *gfneks.Nodegroup) error {
latest, err := ParseReleaseVersion(latestReleaseVersion)
if err != nil {
return err
}
current, err := ParseReleaseVersion(*nodegroup.ReleaseVersion)
if err != nil {
return err
}
if latest.LTE(current) && launchTemplateVersion == "" {
logger.Info("nodegroup %q is already up-to-date", *nodegroup.NodegroupName)
return nil
}
if latest.GTE(current) {
ngResource.ReleaseVersion = gfnt.NewString(latestReleaseVersion)
}
return nil
}
func (m *Manager) requiresStackUpdate(ctx context.Context, nodeGroupName string) (bool, error) {
ngStack, err := m.stackManager.DescribeNodeGroupStack(ctx, nodeGroupName)
if err != nil {
return false, err
}
ver, found, err := manager.GetEksctlVersionFromTags(ngStack.Tags)
if err != nil {
return false, err
}
if !found {
return true, nil
}
curVer, err := version.ParseEksctlVersion(version.GetVersion())
if err != nil {
return false, errors.Wrap(err, "unexpected error parsing current eksctl version")
}
return !ver.EQ(curVer), nil
}
func (m *Manager) getLatestReleaseVersion(ctx context.Context, kubernetesVersion string, nodeGroup *ekstypes.Nodegroup) (string, error) {
ssmParameterName, err := ami.MakeManagedSSMParameterName(kubernetesVersion, nodeGroup.AmiType)
if err != nil {
return "", err
}
if ssmParameterName == "" {
return "", nil
}
ssmOutput, err := m.ctl.AWSProvider.SSM().GetParameter(ctx, &ssm.GetParameterInput{
Name: &ssmParameterName,
})
if err != nil {
return "", err
}
return *ssmOutput.Parameter.Value, nil
}
func (m *Manager) usesCustomAMIGFNNodeGroup(ctx context.Context, ltResources map[string]*gfnec2.LaunchTemplate, ng *gfneks.Nodegroup) (bool, error) {
if lt, ok := ltResources["LaunchTemplate"]; ok {
return lt.LaunchTemplateData.ImageId != nil, nil
}
if ng.LaunchTemplate == nil || ng.LaunchTemplate.Id == nil {
return false, nil
}
lt := &api.LaunchTemplate{
ID: ng.LaunchTemplate.Id.String(),
}
if version := ng.LaunchTemplate.Version; version != nil {
lt.Version = aws.String(version.String())
}
return m.usesCustomAMI(ctx, lt)
}
func (m *Manager) usesCustomAMIEKSNodeGroup(ctx context.Context, ng *ekstypes.Nodegroup) (bool, error) {
if ng.LaunchTemplate == nil || ng.LaunchTemplate.Id == nil {
return false, nil
}
return m.usesCustomAMI(ctx, &api.LaunchTemplate{
ID: *ng.LaunchTemplate.Id,
Version: ng.LaunchTemplate.Version,
})
}
func (m *Manager) usesCustomAMI(ctx context.Context, lt *api.LaunchTemplate) (bool, error) {
customLaunchTemplate, err := m.launchTemplateFetcher.Fetch(ctx, lt)
if err != nil {
return false, errors.Wrap(err, "error fetching launch template data")
}
return customLaunchTemplate.ImageId != nil, nil
}