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resource_akscluster.go
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resource_akscluster.go
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/*
Copyright 2023 VMware, Inc. All Rights Reserved.
SPDX-License-Identifier: MPL-2.0
*/
package akscluster
import (
"context"
"fmt"
"time"
"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
"github.com/pkg/errors"
"github.com/vmware/terraform-provider-tanzu-mission-control/internal/authctx"
"github.com/vmware/terraform-provider-tanzu-mission-control/internal/client"
"github.com/vmware/terraform-provider-tanzu-mission-control/internal/client/akscluster"
clienterrors "github.com/vmware/terraform-provider-tanzu-mission-control/internal/client/errors"
models "github.com/vmware/terraform-provider-tanzu-mission-control/internal/models/akscluster"
configModels "github.com/vmware/terraform-provider-tanzu-mission-control/internal/models/kubeconfig"
)
func ResourceTMCAKSCluster() *schema.Resource {
return &schema.Resource{
Schema: ClusterSchema,
CreateContext: resourceClusterCreate,
ReadContext: resourceClusterRead,
UpdateContext: resourceClusterInPlaceUpdate,
DeleteContext: resourceClusterDelete,
Importer: &schema.ResourceImporter{
StateContext: resourceClusterImporter,
},
Description: "Tanzu Mission Control AKS Cluster Resource",
}
}
// resourceClusterCreate will create an AKS cluster and any assigned nodepool.
func resourceClusterCreate(ctx context.Context, data *schema.ResourceData, config any) diag.Diagnostics {
tc, ok := config.(authctx.TanzuContext)
if !ok {
return diag.Errorf("error while retrieving Tanzu auth config")
}
cluster, cErr := ConstructCluster(data)
if cErr != nil {
return diag.FromErr(cErr)
}
nodepools := ConstructNodepools(data)
if err := validateCluster(cluster); err != nil {
return diag.FromErr(err)
}
if err := validateNodePools(cluster, nodepools); err != nil {
return diag.FromErr(err)
}
if err := createOrUpdateCluster(cluster, data, tc.TMCConnection.AKSClusterResourceService); err != nil {
return diag.FromErr(err)
}
if err := createNodepools(ctx, nodepools, tc.TMCConnection.AKSNodePoolResourceService); err != nil {
return diag.FromErr(err)
}
ctx, cancel := context.WithTimeout(ctx, getTimeOut(data))
defer cancel()
if err := PollUntilReady(ctx, data, tc.TMCConnection, getPollInterval(ctx)); err != nil {
return diag.FromErr(err)
}
if diagErr := dataSourceTMCAKSClusterRead(ctx, data, tc); diagErr.HasError() {
return diagErr
}
if err := pollForKubeConfig(ctx, data, tc.TMCConnection, getPollInterval(ctx)); err != nil {
return diag.FromErr(err)
}
return diag.Diagnostics{}
}
// resourceClusterRead read state of existing AKS cluster and assigned nodepools.
func resourceClusterRead(ctx context.Context, data *schema.ResourceData, config any) diag.Diagnostics {
return dataSourceTMCAKSClusterRead(ctx, data, config)
}
// resourceClusterInPlaceUpdate updates AKS cluster settings in place then manually reconciles nodepool changes
// updating, creating, and deleting where appropriate.
func resourceClusterInPlaceUpdate(ctx context.Context, data *schema.ResourceData, config any) diag.Diagnostics {
tc, ok := config.(authctx.TanzuContext)
if !ok {
return diag.Errorf("error while retrieving Tanzu auth config")
}
clusterResp, nodepoolResp, getErr := getClusterAndNodepools(ctx, data, tc.TMCConnection)
if getErr != nil || clusterResp == nil || nodepoolResp == nil {
return diag.FromErr(errors.Errorf("Unable to get Tanzu Mission Control AKS cluster entry, name : %s", data.Get(NameKey)))
}
// Make changes to the cluster config.
if clusterChange := data.HasChange("spec.0.config.0"); clusterChange {
if updateErr := updateClusterConfig(ctx, data, clusterResp, tc); updateErr != nil {
return diag.FromErr(updateErr)
}
}
// Make changes to cluster nodepools.
if data.HasChange("spec.0.nodepool") {
if npChangeErr := handleNodepoolChanges(ctx, nodepoolResp.Nodepools, data, tc.TMCConnection); npChangeErr != nil {
return diag.FromErr(npChangeErr)
}
}
return dataSourceTMCAKSClusterRead(ctx, data, config)
}
// resourceClusterDelete deletes an AKS cluster and all associated node pools.
func resourceClusterDelete(ctx context.Context, data *schema.ResourceData, config any) diag.Diagnostics {
tc, ok := config.(authctx.TanzuContext)
if !ok {
return diag.Errorf("error while retrieving Tanzu auth config")
}
fn := extractClusterFullName(data)
if err := tc.TMCConnection.AKSClusterResourceService.AksClusterResourceServiceDelete(fn, "false"); err != nil && !clienterrors.IsNotFoundError(err) {
return diag.FromErr(errors.Wrapf(err, "Unable to delete Tanzu Mission Control AKS cluster entry, name : %s", data.Get(NameKey)))
}
ctx, cancel := context.WithTimeout(ctx, getTimeOut(data))
defer cancel()
if err := pollUntilClusterDeleted(ctx, data, tc.TMCConnection.AKSClusterResourceService, getPollInterval(ctx)); err != nil {
return diag.FromErr(err)
}
data.SetId("") // explicitly delete
return diag.Diagnostics{}
}
func resourceClusterImporter(_ context.Context, data *schema.ResourceData, config any) ([]*schema.ResourceData, error) {
tc, ok := config.(authctx.TanzuContext)
if !ok {
return nil, errors.New("error while retrieving Tanzu auth config")
}
id := data.Id()
if id == "" {
return nil, errors.New("ID is needed to import an TMC AKS cluster")
}
resp, err := tc.TMCConnection.AKSClusterResourceService.AksClusterResourceServiceGetByID(id)
if err != nil {
return nil, errors.Wrapf(err, "Unable to get Tanzu Mission Control AKS cluster entry for id %s", id)
}
npresp, err := tc.TMCConnection.AKSNodePoolResourceService.AksNodePoolResourceServiceList(resp.AksCluster.FullName)
if err != nil {
return nil, errors.Wrapf(err, "Unable to get Tanzu Mission Control AKS nodepools for cluster %s", resp.AksCluster.FullName.Name)
}
if err = data.Set(CredentialNameKey, resp.AksCluster.FullName.CredentialName); err != nil {
return nil, errors.Wrapf(err, "Failed to set credential name for the cluster %s", resp.AksCluster.FullName.Name)
}
if err = data.Set(SubscriptionIDKey, resp.AksCluster.FullName.SubscriptionID); err != nil {
return nil, errors.Wrapf(err, "Failed to set subscription for the cluster %s", resp.AksCluster.FullName.Name)
}
if err = data.Set(ResourceGroupNameKey, resp.AksCluster.FullName.ResourceGroupName); err != nil {
return nil, errors.Wrapf(err, "Failed to set resource group for the cluster %s", resp.AksCluster.FullName.Name)
}
if err = data.Set(NameKey, resp.AksCluster.FullName.Name); err != nil {
return nil, errors.Wrapf(err, "Failed to set name for the cluster %s", resp.AksCluster.FullName.Name)
}
if err = setResourceState(data, resp.AksCluster, npresp.Nodepools); err != nil {
return nil, err
}
return []*schema.ResourceData{data}, nil
}
// createOrUpdateCluster creates an AKS cluster in TMC. It is possible the cluster already exists in which case the
// existing cluster is updated with any node pools defined in the configuration.
func createOrUpdateCluster(cluster *models.VmwareTanzuManageV1alpha1AksCluster, data *schema.ResourceData, client akscluster.ClientService) error {
clusterReq := &models.VmwareTanzuManageV1alpha1AksclusterCreateAksClusterRequest{AksCluster: cluster}
createResp, err := client.AksClusterResourceServiceCreate(clusterReq)
if clienterrors.IsAlreadyExistsError(err) {
if getErr := getExistingCluster(data, client, clusterReq); getErr != nil {
return errors.Wrapf(getErr, "Failed to created cluster do to conflict but conflicting cluster not found")
}
return nil
}
if err != nil {
return err
}
data.SetId(createResp.AksCluster.Meta.UID)
return nil
}
func getExistingCluster(data *schema.ResourceData, client akscluster.ClientService, clusterReq *models.VmwareTanzuManageV1alpha1AksclusterCreateAksClusterRequest) error {
getResp, getErr := client.AksClusterResourceServiceGet(clusterReq.AksCluster.FullName)
if getErr != nil {
return getErr
}
data.SetId(getResp.AksCluster.Meta.UID)
return nil
}
func updateClusterConfig(ctx context.Context, data *schema.ResourceData, clusterResp *models.VmwareTanzuManageV1alpha1AksclusterGetAksClusterResponse, tc authctx.TanzuContext) error {
cluster, cErr := ConstructCluster(data)
if cErr != nil {
return cErr
}
cluster.Meta = clusterResp.AksCluster.Meta
updateReq := &models.VmwareTanzuManageV1alpha1AksclusterUpdateAksClusterRequest{AksCluster: cluster}
if _, updateErr := tc.TMCConnection.AKSClusterResourceService.AksClusterResourceServiceUpdate(updateReq); updateErr != nil {
return errors.Wrapf(updateErr, "Unable to update Tanzu Mission Control AKS cluster entry, name : %s", data.Get(NameKey))
}
ctxTimeout, cancel := context.WithTimeout(ctx, getTimeOut(data))
defer cancel()
return PollUntilReady(ctxTimeout, data, tc.TMCConnection, getPollInterval(ctx))
}
// validateCluster returns an error configuration will result in a cluster that will fail to create.
func validateCluster(cluster *models.VmwareTanzuManageV1alpha1AksCluster) error {
nc := cluster.Spec.Config.NetworkConfig
// Pod subNetId cannot be set for network CNI 'kubenet' or 'azure' without overlay.
if nc.NetworkPlugin != azureCNI && nc.NetworkPluginMode == cniAzureOverlay {
return errors.New("network_plugin_mode 'overlay' can only be used if network_plugin is set to 'azure'")
}
// podCIDR cannot be set if network-plugin is 'azure' without 'overlay'
if nc.NetworkPlugin == azureCNI && nc.NetworkPluginMode != cniAzureOverlay && !emptyStringArray(nc.PodCidrs) {
return errors.New("podCIDR cannot be set if network-plugin is 'azure' without 'overlay'")
}
return nil
}
func emptyStringArray(strArray []string) bool {
if len(strArray) == 0 {
return true
}
for _, value := range strArray {
if value != "" {
return false
}
}
return true
}
func PollUntilReady(ctx context.Context, data *schema.ResourceData, mc *client.TanzuMissionControl, interval time.Duration) error {
ticker := time.NewTicker(interval)
defer ticker.Stop()
fn := extractClusterFullName(data)
for {
select {
case <-ctx.Done():
return errors.New("Timed out waiting for READY")
case <-ticker.C:
aksClusterResp, err := mc.AKSClusterResourceService.AksClusterResourceServiceGet(fn)
if clienterrors.IsNotFoundError(err) {
_ = schema.RemoveFromState(data, nil)
return errors.Errorf("Unable to get Tanzu Mission Control AKS cluster entry, name : %s", data.Get(NameKey))
}
if clusterHasFatalError(aksClusterResp) {
return errors.Errorf("Cluster creation failed: %s", getErrorReason(aksClusterResp.AksCluster.Status.Conditions))
}
if clusterIsReady(aksClusterResp) {
_, npErr := mc.AKSNodePoolResourceService.AksNodePoolResourceServiceList(fn)
if clienterrors.IsNotFoundError(npErr) {
return errors.Errorf("Unable to get Tanzu Mission Control AKS nodepools for entry, name : %s", data.Get(NameKey))
}
if npErr == nil {
return nil
}
}
}
}
}
func pollForKubeConfig(ctx context.Context, data *schema.ResourceData, mc *client.TanzuMissionControl, interval time.Duration) error {
if !isWaitForKubeconfig(data) {
return nil
}
ticker := time.NewTicker(interval)
defer ticker.Stop()
for {
select {
case <-ctx.Done():
return errors.New("Timed out trying to get KubeConfig")
case <-ticker.C:
name, ok := data.GetOk("spec.0.agent_name")
if !ok {
return errors.New("unable to get agent name for cluster")
}
fn := &configModels.VmwareTanzuManageV1alpha1ClusterFullName{
ManagementClusterName: "aks",
ProvisionerName: "aks",
Name: name.(string),
OrgID: "",
}
resp, err := mc.KubeConfigResourceService.KubeconfigServiceGet(fn)
if kubeConfigReady(err, resp) {
if err = data.Set(kubeconfigKey, resp.Kubeconfig); err != nil {
return fmt.Errorf("failed to set kubeconfig, %w", err)
}
return nil
}
}
}
}
func kubeConfigReady(err error, resp *configModels.VmwareTanzuManageV1alpha1ClusterKubeconfigGetKubeconfigResponse) bool {
return err == nil && *resp.Status == configModels.VmwareTanzuManageV1alpha1ClusterKubeconfigGetKubeconfigResponseStatusREADY
}
func isWaitForKubeconfig(data *schema.ResourceData) bool {
v := data.Get(waitForKubeconfig)
if v != nil {
return v.(bool)
}
return false
}
func pollUntilClusterDeleted(ctx context.Context, data *schema.ResourceData, client akscluster.ClientService, interval time.Duration) error {
ticker := time.NewTicker(interval)
defer ticker.Stop()
fn := extractClusterFullName(data)
for {
select {
case <-ctx.Done():
return errors.New("timed out waiting for delete")
case <-ticker.C:
_, err := client.AksClusterResourceServiceGet(fn)
if clienterrors.IsNotFoundError(err) {
return nil
}
}
}
}