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resource_server_anti_affinity.go
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resource_server_anti_affinity.go
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package ddcloud
import (
"fmt"
"log"
"time"
"github.com/DimensionDataResearch/dd-cloud-compute-terraform/retry"
"github.com/DimensionDataResearch/go-dd-cloud-compute/compute"
"github.com/hashicorp/terraform/helper/schema"
)
const (
resourceKeyAntiAffinityRuleServer1ID = "server1"
resourceKeyAntiAffinityRuleServer1Name = "server1_name"
resourceKeyAntiAffinityRuleServer2ID = "server2"
resourceKeyAntiAffinityRuleServer2Name = "server2_name"
resourceKeyAntiAffinityRuleNetworkDomainID = "networkdomain"
resourceCreateTimeoutAntiAffinityRule = 5 * time.Minute
resourceDeleteTimeoutAntiAffinityRule = 5 * time.Minute
)
func resourceAntiAffinityRule() *schema.Resource {
return &schema.Resource{
Create: resourceAntiAffinityRuleCreate,
Read: resourceAntiAffinityRuleRead,
Delete: resourceAntiAffinityRuleDelete,
Schema: map[string]*schema.Schema{
resourceKeyAntiAffinityRuleServer1ID: &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
Description: "The Id of the first server that the anti-affinity rule relates to.",
},
resourceKeyAntiAffinityRuleServer1Name: &schema.Schema{
Type: schema.TypeString,
Computed: true,
Description: "The name of the first server that the anti-affinity rule relates to.",
},
resourceKeyAntiAffinityRuleServer2ID: &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
Description: "The Id of the second server that the anti-affinity rule relates to.",
},
resourceKeyAntiAffinityRuleServer2Name: &schema.Schema{
Type: schema.TypeString,
Computed: true,
Description: "The name of the second server that the anti-affinity rule relates to.",
},
resourceKeyAntiAffinityRuleNetworkDomainID: &schema.Schema{
Type: schema.TypeString,
Computed: true,
Description: "The Id of the network domain in which the anti-affinity rule applies.",
},
},
}
}
// Create a server anti-affinity rule resource.
func resourceAntiAffinityRuleCreate(data *schema.ResourceData, provider interface{}) error {
server1ID := data.Get(resourceKeyAntiAffinityRuleServer1ID).(string)
server2ID := data.Get(resourceKeyAntiAffinityRuleServer2ID).(string)
log.Printf("Create server anti-affinity rule for servers '%s' and '%s'.", server1ID, server2ID)
providerState := provider.(*providerState)
apiClient := providerState.Client()
// Capture server details
server1, err := apiClient.GetServer(server1ID)
if err != nil {
return err
}
if server1 == nil {
return fmt.Errorf("cannot create anti-affinity rule (server 1 not found with Id '%s')", server1ID)
}
server2, err := apiClient.GetServer(server2ID)
if err != nil {
return err
}
if server2 == nil {
return fmt.Errorf("cannot create anti-affinity rule (server 2 not found with Id '%s')", server2ID)
}
// We don't support anti-affinity rules between servers in different network domains.
if server1.Network.NetworkDomainID != server2.Network.NetworkDomainID {
return fmt.Errorf("cannot create server anti-affinity rule (server '%s' is in network domain '%s', but server '%s' is in network domain '%s'", server1ID, server1.Network.NetworkDomainID, server2ID, server2.Network.NetworkDomainID)
}
networkDomainID := server1.Network.NetworkDomainID
var (
ruleID string
createError error
)
operationDescription := fmt.Sprintf("Create anti-affinity rule between servers '%s' and '%s'", server1ID, server2ID)
err = providerState.RetryAction(operationDescription, func(context retry.Context) {
// CloudControl has issues if more than one asynchronous operation is initated at a time (returns UNEXPECTED_ERROR).
asyncLock := providerState.AcquireAsyncOperationLock("Create server anti-affinity rule '%s'", networkDomainID)
defer asyncLock.Release()
ruleID, createError = apiClient.CreateServerAntiAffinityRule(server1ID, server2ID)
if compute.IsResourceBusyError(createError) {
context.Retry()
} else if createError != nil {
context.Fail(createError)
}
asyncLock.Release()
})
if err != nil {
return err
}
data.SetId(ruleID)
qualifiedRuleID := networkDomainID + "/" + ruleID
resource, err := apiClient.WaitForChange(compute.ResourceTypeServerAntiAffinityRule, qualifiedRuleID, "Create", resourceCreateTimeoutAntiAffinityRule)
if err != nil {
return err
}
antiAffinityRule := resource.(*compute.ServerAntiAffinityRule)
if antiAffinityRule == nil {
return fmt.Errorf("cannot find newly-created server anti-affinity rule '%s' in network domain '%s'", ruleID, networkDomainID)
}
log.Printf("Created server anti-affinity rule '%s'.", ruleID)
// CloudControl makes no guarantees about the order in which the target servers are returned
serversByID := make(map[string]compute.ServerSummary)
for _, server := range antiAffinityRule.Servers {
serversByID[server.ID] = server
}
targetServer1, ok := serversByID[server1ID]
if !ok {
return fmt.Errorf("anti-affinity rule '%s' targets unexpected server ('%s')", ruleID, server1ID)
}
targetServer2, ok := serversByID[server2ID]
if !ok {
return fmt.Errorf("anti-affinity rule '%s' targets unexpected server ('%s')", ruleID, server2ID)
}
data.Set(resourceKeyAntiAffinityRuleServer1Name, targetServer1.Name)
data.Set(resourceKeyAntiAffinityRuleServer2Name, targetServer2.Name)
data.Set(resourceKeyAntiAffinityRuleNetworkDomainID, server1.Network.NetworkDomainID)
return nil
}
// Read a server anti-affinity rule resource.
func resourceAntiAffinityRuleRead(data *schema.ResourceData, provider interface{}) error {
ruleID := data.Id()
server1Name := data.Get(resourceKeyAntiAffinityRuleServer1Name).(string)
server2Name := data.Get(resourceKeyAntiAffinityRuleServer2Name).(string)
networkDomainID := data.Get(resourceKeyAntiAffinityRuleNetworkDomainID).(string)
log.Printf("read server anti-affinity rule '%s' (servers '%s' and '%s')", ruleID, server1Name, server2Name)
apiClient := provider.(*providerState).Client()
antiAffinityRule, err := apiClient.GetServerAntiAffinityRule(ruleID, networkDomainID)
if err != nil {
return err
}
if antiAffinityRule != nil {
if len(antiAffinityRule.Servers) != 2 {
return fmt.Errorf("anti-affinity rule relates to unexpected number of servers (%d)",
len(antiAffinityRule.Servers),
)
}
// CloudControl makes no guarantees about the order in which the target servers are returned
serversByID := make(map[string]compute.ServerSummary)
for _, server := range antiAffinityRule.Servers {
serversByID[server.ID] = server
}
server1ID := data.Get(resourceKeyAntiAffinityRuleServer1ID).(string)
server1, ok := serversByID[server1ID]
if !ok {
return fmt.Errorf("Anti-affinity rule '%s' relates to unexpected server ('%s')", ruleID, server1ID)
}
server2ID := data.Get(resourceKeyAntiAffinityRuleServer1ID).(string)
server2, ok := serversByID[server2ID]
if !ok {
return fmt.Errorf("Anti-affinity rule '%s' relates to unexpected server ('%s')", ruleID, server2ID)
}
data.Set(resourceKeyAntiAffinityRuleServer1Name, server1.Name)
data.Set(resourceKeyAntiAffinityRuleServer2Name, server2.Name)
} else {
data.SetId("") // Mark resource as deleted.
}
return nil
}
// Delete a server anti-affinity rule resource.
func resourceAntiAffinityRuleDelete(data *schema.ResourceData, provider interface{}) error {
ruleID := data.Id()
networkDomainID := data.Get(resourceKeyAntiAffinityRuleNetworkDomainID).(string)
log.Printf("Delete server anti-affinity rule '%s' in network domain '%s'.", ruleID, networkDomainID)
providerState := provider.(*providerState)
apiClient := providerState.Client()
operationDescription := fmt.Sprintf("Delete anti-affinity rule '%s'", ruleID)
err := providerState.RetryAction(operationDescription, func(context retry.Context) {
// CloudControl has issues if more than one asynchronous operation is initated at a time (returns UNEXPECTED_ERROR).
asyncLock := providerState.AcquireAsyncOperationLock("Delete server anti-affinity rule '%s'", networkDomainID)
defer asyncLock.Release()
deleteError := apiClient.DeleteServerAntiAffinityRule(ruleID, networkDomainID)
if compute.IsResourceBusyError(deleteError) {
context.Retry()
} else if deleteError != nil {
context.Fail(deleteError)
}
asyncLock.Release()
})
if err != nil {
return err
}
log.Printf("Deleting server anti-affinity rule '%s' in network domain '%s'...", ruleID, networkDomainID)
qualifiedRuleID := networkDomainID + "/" + ruleID
err = apiClient.WaitForDelete(compute.ResourceTypeServerAntiAffinityRule, qualifiedRuleID, resourceDeleteTimeoutAntiAffinityRule)
if err != nil {
return err
}
log.Printf("Deleted server anti-affinity rule '%s' in network domain '%s'.", ruleID, networkDomainID)
return nil
}