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resource_ibm_is_instance_group.go
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resource_ibm_is_instance_group.go
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// Copyright IBM Corp. 2017, 2021 All Rights Reserved.
// Licensed under the Mozilla Public License v2.0
package vpc
import (
"context"
"fmt"
"log"
"os"
"strings"
"time"
"github.com/IBM-Cloud/terraform-provider-ibm/ibm/flex"
"github.com/IBM-Cloud/terraform-provider-ibm/ibm/validate"
"github.com/IBM/vpc-go-sdk/vpcv1"
"github.com/hashicorp/terraform-plugin-sdk/v2/helper/customdiff"
"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
)
const (
// SCALING ...
SCALING = "scaling"
// HEALTHY ...
HEALTHY = "healthy"
// DELETING ...
DELETING = "deleting"
)
func ResourceIBMISInstanceGroup() *schema.Resource {
return &schema.Resource{
Create: resourceIBMISInstanceGroupCreate,
Read: resourceIBMISInstanceGroupRead,
Update: resourceIBMISInstanceGroupUpdate,
Delete: resourceIBMISInstanceGroupDelete,
Exists: resourceIBMISInstanceGroupExists,
Importer: &schema.ResourceImporter{},
CustomizeDiff: customdiff.Sequence(
func(_ context.Context, diff *schema.ResourceDiff, v interface{}) error {
return flex.ResourceTagsCustomizeDiff(diff)
},
),
Timeouts: &schema.ResourceTimeout{
Create: schema.DefaultTimeout(10 * time.Minute),
Update: schema.DefaultTimeout(10 * time.Minute),
Delete: schema.DefaultTimeout(5 * time.Minute),
},
Schema: map[string]*schema.Schema{
"name": {
Type: schema.TypeString,
Required: true,
ValidateFunc: validate.InvokeValidator("ibm_is_instance_group", "name"),
Description: "The user-defined name for this instance group",
},
"instance_template": {
Type: schema.TypeString,
Required: true,
Description: "instance template ID",
},
"instance_count": {
Type: schema.TypeInt,
Optional: true,
Default: 0,
ValidateFunc: validate.InvokeValidator("ibm_is_instance_group", "instance_count"),
Description: "The number of instances in the instance group",
},
"resource_group": {
Type: schema.TypeString,
Optional: true,
Computed: true,
Description: "Resource group ID",
},
"crn": {
Type: schema.TypeString,
Computed: true,
Description: "The CRN of this instance group",
},
"subnets": {
Type: schema.TypeList,
Elem: &schema.Schema{Type: schema.TypeString},
Required: true,
Description: "list of subnet IDs",
},
"application_port": {
Type: schema.TypeInt,
Optional: true,
ValidateFunc: validate.InvokeValidator("ibm_is_instance_group", "application_port"),
RequiredWith: []string{"load_balancer", "load_balancer_pool"},
Description: "Used by the instance group when scaling up instances to supply the port for the load balancer pool member.",
},
"load_balancer": {
Type: schema.TypeString,
Optional: true,
RequiredWith: []string{"application_port", "load_balancer_pool"},
Description: "load balancer ID",
},
"load_balancer_pool": {
Type: schema.TypeString,
Optional: true,
RequiredWith: []string{"application_port", "load_balancer"},
Description: "load balancer pool ID",
},
"managers": {
Type: schema.TypeList,
Elem: &schema.Schema{Type: schema.TypeString},
Computed: true,
Description: "list of Managers associated with instancegroup",
},
"instances": {
Type: schema.TypeInt,
Computed: true,
Description: "number of instances in the intances group",
},
"vpc": {
Type: schema.TypeString,
Computed: true,
Description: "vpc instance",
},
"status": {
Type: schema.TypeString,
Computed: true,
Description: "Instance group status - deleting, healthy, scaling, unhealthy",
},
"tags": {
Type: schema.TypeSet,
Optional: true,
Computed: true,
Elem: &schema.Schema{Type: schema.TypeString, ValidateFunc: validate.InvokeValidator("ibm_is_instance_group", "tag")},
Set: flex.ResourceIBMVPCHash,
Description: "List of tags for instance group",
},
},
}
}
func ResourceIBMISInstanceGroupValidator() *validate.ResourceValidator {
validateSchema := make([]validate.ValidateSchema, 0)
validateSchema = append(validateSchema,
validate.ValidateSchema{
Identifier: "name",
ValidateFunctionIdentifier: validate.ValidateRegexpLen,
Type: validate.TypeString,
Required: true,
Regexp: `^([a-z]|[a-z][-a-z0-9]*[a-z0-9])$`,
MinValueLength: 1,
MaxValueLength: 63})
validateSchema = append(validateSchema,
validate.ValidateSchema{
Identifier: "instance_count",
ValidateFunctionIdentifier: validate.IntBetween,
Type: validate.TypeInt,
MinValue: "0",
MaxValue: "1000"})
validateSchema = append(validateSchema,
validate.ValidateSchema{
Identifier: "application_port",
ValidateFunctionIdentifier: validate.IntBetween,
Type: validate.TypeInt,
MinValue: "1",
MaxValue: "65535"})
validateSchema = append(validateSchema,
validate.ValidateSchema{
Identifier: "tag",
ValidateFunctionIdentifier: validate.ValidateRegexpLen,
Type: validate.TypeString,
Optional: true,
Regexp: `^[A-Za-z0-9:_ .-]+$`,
MinValueLength: 1,
MaxValueLength: 128})
ibmISInstanceGroupResourceValidator := validate.ResourceValidator{ResourceName: "ibm_is_instance_group", Schema: validateSchema}
return &ibmISInstanceGroupResourceValidator
}
func resourceIBMISInstanceGroupCreate(d *schema.ResourceData, meta interface{}) error {
name := d.Get("name").(string)
instanceTemplate := d.Get("instance_template").(string)
subnets := d.Get("subnets")
sess, err := vpcClient(meta)
if err != nil {
return err
}
var subnetIDs []vpcv1.SubnetIdentityIntf
for _, s := range subnets.([]interface{}) {
subnet := s.(string)
subnetIDs = append(subnetIDs, &vpcv1.SubnetIdentity{ID: &subnet})
}
instanceGroupOptions := vpcv1.CreateInstanceGroupOptions{
InstanceTemplate: &vpcv1.InstanceTemplateIdentity{
ID: &instanceTemplate,
},
Subnets: subnetIDs,
Name: &name,
}
var membershipCount int
if v, ok := d.GetOk("instance_count"); ok {
membershipCount = v.(int)
mc := int64(membershipCount)
instanceGroupOptions.MembershipCount = &mc
}
if v, ok := d.GetOk("load_balancer"); ok {
lbID := v.(string)
instanceGroupOptions.LoadBalancer = &vpcv1.LoadBalancerIdentity{ID: &lbID}
}
if v, ok := d.GetOk("load_balancer_pool"); ok {
lbPoolID := v.(string)
instanceGroupOptions.LoadBalancerPool = &vpcv1.LoadBalancerPoolIdentity{ID: &lbPoolID}
}
if v, ok := d.GetOk("resource_group"); ok {
resourceGroup := v.(string)
instanceGroupOptions.ResourceGroup = &vpcv1.ResourceGroupIdentity{ID: &resourceGroup}
}
if v, ok := d.GetOk("application_port"); ok {
applicatioPort := int64(v.(int))
instanceGroupOptions.ApplicationPort = &applicatioPort
}
instanceGroup, response, err := sess.CreateInstanceGroup(&instanceGroupOptions)
if err != nil || instanceGroup == nil {
return fmt.Errorf("[ERROR] Error Creating InstanceGroup: %s\n%s", err, response)
}
d.SetId(*instanceGroup.ID)
_, healthError := waitForHealthyInstanceGroup(d.Id(), meta, d.Timeout(schema.TimeoutCreate))
if healthError != nil {
return healthError
}
v := os.Getenv("IC_ENV_TAGS")
if _, ok := d.GetOk("tags"); ok || v != "" {
oldList, newList := d.GetChange("tags")
err = flex.UpdateTagsUsingCRN(oldList, newList, meta, *instanceGroup.CRN)
if err != nil {
log.Printf(
"Error on create of instance group (%s) tags: %s", d.Id(), err)
}
}
return resourceIBMISInstanceGroupRead(d, meta)
}
func resourceIBMISInstanceGroupUpdate(d *schema.ResourceData, meta interface{}) error {
sess, err := vpcClient(meta)
if err != nil {
return err
}
var changed bool
instanceGroupUpdateOptions := vpcv1.UpdateInstanceGroupOptions{}
instanceGroupPatchModel := vpcv1.InstanceGroupPatch{}
if d.HasChange("tags") {
instanceGroupID := d.Id()
getInstanceGroupOptions := vpcv1.GetInstanceGroupOptions{ID: &instanceGroupID}
instanceGroup, response, err := sess.GetInstanceGroup(&getInstanceGroupOptions)
if err != nil || instanceGroup == nil {
return fmt.Errorf("[ERROR] Error getting instance group: %s\n%s", err, response)
}
oldList, newList := d.GetChange("tags")
err = flex.UpdateTagsUsingCRN(oldList, newList, meta, *instanceGroup.CRN)
if err != nil {
log.Printf(
"Error on update of instance group (%s) tags: %s", d.Id(), err)
}
}
if d.HasChange("name") {
name := d.Get("name").(string)
instanceGroupPatchModel.Name = &name
changed = true
}
if d.HasChange("instance_template") {
instanceTemplate := d.Get("instance_template").(string)
instanceGroupPatchModel.InstanceTemplate = &vpcv1.InstanceTemplateIdentity{
ID: &instanceTemplate,
}
changed = true
}
if d.HasChange("instance_count") {
membershipCount := d.Get("instance_count").(int)
mc := int64(membershipCount)
instanceGroupPatchModel.MembershipCount = &mc
changed = true
}
if d.HasChange("subnets") {
subnets := d.Get("subnets")
var subnetIDs []vpcv1.SubnetIdentityIntf
for _, s := range subnets.([]interface{}) {
subnet := s.(string)
subnetIDs = append(subnetIDs, &vpcv1.SubnetIdentity{ID: &subnet})
}
instanceGroupPatchModel.Subnets = subnetIDs
changed = true
}
if d.HasChange("application_port") || d.HasChange("load_balancer") || d.HasChange("load_balancer_pool") {
applicationPort := int64(d.Get("application_port").(int))
lbID := d.Get("load_balancer").(string)
lbPoolID := d.Get("load_balancer_pool").(string)
instanceGroupPatchModel.ApplicationPort = &applicationPort
instanceGroupPatchModel.LoadBalancer = &vpcv1.LoadBalancerIdentity{ID: &lbID}
instanceGroupPatchModel.LoadBalancerPool = &vpcv1.LoadBalancerPoolIdentity{ID: &lbPoolID}
changed = true
}
if changed {
instanceGroupID := d.Id()
instanceGroupUpdateOptions.ID = &instanceGroupID
instanceGroupPatch, err := instanceGroupPatchModel.AsPatch()
if err != nil {
return fmt.Errorf("[ERROR] Error calling asPatch for InstanceGroupPatch: %s", err)
}
instanceGroupUpdateOptions.InstanceGroupPatch = instanceGroupPatch
_, response, err := sess.UpdateInstanceGroup(&instanceGroupUpdateOptions)
if err != nil {
return fmt.Errorf("[ERROR] Error Updating InstanceGroup: %s\n%s", err, response)
}
// wait for instance group health update with update timeout configured.
_, healthError := waitForHealthyInstanceGroup(instanceGroupID, meta, d.Timeout(schema.TimeoutUpdate))
if healthError != nil {
return healthError
}
}
return resourceIBMISInstanceGroupRead(d, meta)
}
func resourceIBMISInstanceGroupRead(d *schema.ResourceData, meta interface{}) error {
sess, err := vpcClient(meta)
if err != nil {
return err
}
instanceGroupID := d.Id()
getInstanceGroupOptions := vpcv1.GetInstanceGroupOptions{ID: &instanceGroupID}
instanceGroup, response, err := sess.GetInstanceGroup(&getInstanceGroupOptions)
if err != nil || instanceGroup == nil {
if response != nil && response.StatusCode == 404 {
d.SetId("")
return nil
}
return fmt.Errorf("[ERROR] Error Getting InstanceGroup: %s\n%s", err, response)
}
d.Set("name", *instanceGroup.Name)
d.Set("instance_template", *instanceGroup.InstanceTemplate.ID)
d.Set("instances", *instanceGroup.MembershipCount)
d.Set("resource_group", *instanceGroup.ResourceGroup.ID)
if instanceGroup.ApplicationPort != nil {
d.Set("application_port", *instanceGroup.ApplicationPort)
}
subnets := make([]string, 0)
for i := 0; i < len(instanceGroup.Subnets); i++ {
subnets = append(subnets, string(*(instanceGroup.Subnets[i].ID)))
}
if instanceGroup.LoadBalancerPool != nil {
d.Set("load_balancer_pool", *instanceGroup.LoadBalancerPool.ID)
}
d.Set("subnets", subnets)
managers := make([]string, 0)
for i := 0; i < len(instanceGroup.Managers); i++ {
managers = append(managers, string(*(instanceGroup.Managers[i].ID)))
}
d.Set("managers", managers)
d.Set("status", *instanceGroup.Status)
d.Set("vpc", *instanceGroup.VPC.ID)
d.Set("crn", *instanceGroup.CRN)
tags, err := flex.GetTagsUsingCRN(meta, *instanceGroup.CRN)
if err != nil {
log.Printf(
"Error on get of instance group (%s) tags: %s", d.Id(), err)
}
d.Set("tags", tags)
return nil
}
func getLBStatus(sess *vpcv1.VpcV1, lbId string) (string, error) {
getlboptions := &vpcv1.GetLoadBalancerOptions{
ID: &lbId,
}
lb, response, err := sess.GetLoadBalancer(getlboptions)
if err != nil || lb == nil {
return "", fmt.Errorf("[ERROR] Error Getting Load Balancer : %s\n%s", err, response)
}
return *lb.ProvisioningStatus, nil
}
func resourceIBMISInstanceGroupDelete(d *schema.ResourceData, meta interface{}) error {
sess, err := vpcClient(meta)
if err != nil {
return err
}
instanceGroupID := d.Id()
// Before we delete the instance group, we need to
// know if the load balancer attached is in active state
// First, get the instance
igOpts := vpcv1.GetInstanceGroupOptions{ID: &instanceGroupID}
instanceGroup, response, err := sess.GetInstanceGroup(&igOpts)
if err != nil || instanceGroup == nil {
if response != nil && response.StatusCode == 404 {
return fmt.Errorf("Instance Group with id:[%s] not found!!", instanceGroupID)
}
return fmt.Errorf("Internal Error fetching info for instance group [%s]", instanceGroupID)
}
// Inorder to delete instance group, need to update membership count to 0
zeroMembers := int64(0)
instanceGroupUpdateOptions := vpcv1.UpdateInstanceGroupOptions{}
instanceGroupPatchModel := vpcv1.InstanceGroupPatch{}
instanceGroupPatchModel.MembershipCount = &zeroMembers
instanceGroupPatch, err := instanceGroupPatchModel.AsPatch()
if err != nil {
return fmt.Errorf("[ERROR] Error calling asPatch for ImagePatch: %s", err)
}
instanceGroupUpdateOptions.ID = &instanceGroupID
instanceGroupUpdateOptions.InstanceGroupPatch = instanceGroupPatch
_, response, err = sess.UpdateInstanceGroup(&instanceGroupUpdateOptions)
if err != nil {
return fmt.Errorf("[ERROR] Error updating instanceGroup's instance count to 0 : %s\n%s", err, response)
}
_, healthError := waitForHealthyInstanceGroup(instanceGroupID, meta, d.Timeout(schema.TimeoutUpdate))
if healthError != nil {
return healthError
}
// If there is any load balancer, please check if it is active
if instanceGroup.LoadBalancerPool != nil {
loadBalancerPool := *instanceGroup.LoadBalancerPool.Href
// The sixth component is the Load Balancer ID
loadBalancerID := strings.Split(loadBalancerPool, "/")[5]
// Now check if the load balancer is in active state or not
lbStatus, err := getLBStatus(sess, loadBalancerID)
if err != nil {
return err
}
if lbStatus != "active" {
log.Printf("Load Balancer [%s] is not active....Waiting it to be active!\n", loadBalancerID)
_, err := isWaitForLBAvailable(sess, loadBalancerID, d.Timeout(schema.TimeoutDelete))
if err != nil {
return err
}
lbStatus, err = getLBStatus(sess, loadBalancerID)
if err != nil {
return err
}
if lbStatus != "active" {
return fmt.Errorf("LoadBalancer [%s] is not active yet! Current Load Balancer status is [%s]", loadBalancerID, lbStatus)
}
}
}
deleteInstanceGroupOptions := vpcv1.DeleteInstanceGroupOptions{ID: &instanceGroupID}
response, Err := sess.DeleteInstanceGroup(&deleteInstanceGroupOptions)
if Err != nil {
if response != nil && response.StatusCode == 404 {
d.SetId("")
return nil
}
return fmt.Errorf("[ERROR] Error Deleting the InstanceGroup: %s\n%s", Err, response)
}
_, deleteError := waitForInstanceGroupDelete(d, meta)
if deleteError != nil {
return deleteError
}
return nil
}
func resourceIBMISInstanceGroupExists(d *schema.ResourceData, meta interface{}) (bool, error) {
sess, err := vpcClient(meta)
if err != nil {
return false, err
}
instanceGroupID := d.Id()
getInstanceGroupOptions := vpcv1.GetInstanceGroupOptions{ID: &instanceGroupID}
_, response, err := sess.GetInstanceGroup(&getInstanceGroupOptions)
if err != nil {
if response != nil && response.StatusCode == 404 {
return false, nil
}
return false, fmt.Errorf("[ERROR] Error Getting InstanceGroup: %s\n%s", err, response)
}
return true, nil
}
func waitForHealthyInstanceGroup(instanceGroupID string, meta interface{}, timeout time.Duration) (interface{}, error) {
sess, err := vpcClient(meta)
if err != nil {
return nil, err
}
getInstanceGroupOptions := vpcv1.GetInstanceGroupOptions{ID: &instanceGroupID}
healthStateConf := &resource.StateChangeConf{
Pending: []string{SCALING},
Target: []string{HEALTHY},
Refresh: func() (interface{}, string, error) {
instanceGroup, response, err := sess.GetInstanceGroup(&getInstanceGroupOptions)
if err != nil || instanceGroup == nil {
return nil, SCALING, fmt.Errorf("[ERROR] Error Getting InstanceGroup: %s\n%s", err, response)
}
log.Println("Status : ", *instanceGroup.Status)
if *instanceGroup.Status == "" {
return instanceGroup, SCALING, nil
}
return instanceGroup, *instanceGroup.Status, nil
},
Timeout: timeout,
Delay: 20 * time.Second,
MinTimeout: 5 * time.Second,
PollInterval: 10 * time.Second,
}
return healthStateConf.WaitForState()
}
func waitForInstanceGroupDelete(d *schema.ResourceData, meta interface{}) (interface{}, error) {
healthStateConf := &resource.StateChangeConf{
Pending: []string{HEALTHY},
Target: []string{DELETING},
Refresh: func() (interface{}, string, error) {
resp, err := resourceIBMISInstanceGroupExists(d, meta)
if resp {
return resp, HEALTHY, nil
}
return resp, DELETING, err
},
Timeout: d.Timeout(schema.TimeoutDelete),
Delay: 20 * time.Second,
MinTimeout: 5 * time.Second,
PollInterval: 10 * time.Second,
}
return healthStateConf.WaitForState()
}