package google import ( "fmt" "log" "time" "github.com/hashicorp/terraform/helper/schema" "google.golang.org/api/compute/v1" "google.golang.org/api/googleapi" ) func resourceComputeAutoscaler() *schema.Resource { return &schema.Resource{ Create: resourceComputeAutoscalerCreate, Read: resourceComputeAutoscalerRead, Update: resourceComputeAutoscalerUpdate, Delete: resourceComputeAutoscalerDelete, Schema: map[string]*schema.Schema{ "name": &schema.Schema{ Type: schema.TypeString, ForceNew: true, Required: true, }, "description": &schema.Schema{ Type: schema.TypeString, Optional: true, }, "target": &schema.Schema{ Type: schema.TypeString, Required: true, }, "autoscaling_policy": &schema.Schema{ Type: schema.TypeList, Optional: true, Elem: &schema.Resource{ Schema: map[string]*schema.Schema{ "min_replicas": &schema.Schema{ Type: schema.TypeInt, Required: true, }, "max_replicas": &schema.Schema{ Type: schema.TypeInt, Required: true, }, "cooldown_period": &schema.Schema{ Type: schema.TypeInt, Optional: true, Default: 60, }, "cpu_utilization": &schema.Schema{ Type: schema.TypeList, Optional: true, Elem: &schema.Resource{ Schema: map[string]*schema.Schema{ "target": &schema.Schema{ Type: schema.TypeFloat, Required: true, }, }, }, }, "metric": &schema.Schema{ Type: schema.TypeList, Optional: true, Elem: &schema.Resource{ Schema: map[string]*schema.Schema{ "name": &schema.Schema{ Type: schema.TypeString, Required: true, }, "target": &schema.Schema{ Type: schema.TypeFloat, Required: true, }, "type": &schema.Schema{ Type: schema.TypeString, Required: true, }, }, }, }, "load_balancing_utilization": &schema.Schema{ Type: schema.TypeList, Optional: true, Elem: &schema.Resource{ Schema: map[string]*schema.Schema{ "target": &schema.Schema{ Type: schema.TypeFloat, Required: true, }, }, }, }, }, }, }, "zone": &schema.Schema{ Type: schema.TypeString, Required: true, ForceNew: true, }, "self_link": &schema.Schema{ Type: schema.TypeString, Computed: true, }, }, } } func buildAutoscaler(d *schema.ResourceData) (*compute.Autoscaler, error) { // Build the parameter scaler := &compute.Autoscaler{ Name: d.Get("name").(string), Target: d.Get("target").(string), } // Optional fields if v, ok := d.GetOk("description"); ok { scaler.Description = v.(string) } aspCount := d.Get("autoscaling_policy.#").(int) if aspCount != 1 { return nil, fmt.Errorf("The autoscaler must have exactly one autoscaling_policy, found %d.", aspCount) } prefix := "autoscaling_policy.0." scaler.AutoscalingPolicy = &compute.AutoscalingPolicy{ MaxNumReplicas: int64(d.Get(prefix + "max_replicas").(int)), MinNumReplicas: int64(d.Get(prefix + "min_replicas").(int)), CoolDownPeriodSec: int64(d.Get(prefix + "cooldown_period").(int)), } // Check that only one autoscaling policy is defined policyCounter := 0 if _, ok := d.GetOk(prefix + "cpu_utilization"); ok { if d.Get(prefix+"cpu_utilization.0.target").(float64) != 0 { cpuUtilCount := d.Get(prefix + "cpu_utilization.#").(int) if cpuUtilCount != 1 { return nil, fmt.Errorf("The autoscaling_policy must have exactly one cpu_utilization, found %d.", cpuUtilCount) } policyCounter++ scaler.AutoscalingPolicy.CpuUtilization = &compute.AutoscalingPolicyCpuUtilization{ UtilizationTarget: d.Get(prefix + "cpu_utilization.0.target").(float64), } } } if _, ok := d.GetOk("autoscaling_policy.0.metric"); ok { if d.Get(prefix+"metric.0.name") != "" { policyCounter++ metricCount := d.Get(prefix + "metric.#").(int) if metricCount != 1 { return nil, fmt.Errorf("The autoscaling_policy must have exactly one metric, found %d.", metricCount) } scaler.AutoscalingPolicy.CustomMetricUtilizations = []*compute.AutoscalingPolicyCustomMetricUtilization{ { Metric: d.Get(prefix + "metric.0.name").(string), UtilizationTarget: d.Get(prefix + "metric.0.target").(float64), UtilizationTargetType: d.Get(prefix + "metric.0.type").(string), }, } } } if _, ok := d.GetOk("autoscaling_policy.0.load_balancing_utilization"); ok { if d.Get(prefix+"load_balancing_utilization.0.target").(float64) != 0 { policyCounter++ lbuCount := d.Get(prefix + "load_balancing_utilization.#").(int) if lbuCount != 1 { return nil, fmt.Errorf("The autoscaling_policy must have exactly one load_balancing_utilization, found %d.", lbuCount) } scaler.AutoscalingPolicy.LoadBalancingUtilization = &compute.AutoscalingPolicyLoadBalancingUtilization{ UtilizationTarget: d.Get(prefix + "load_balancing_utilization.0.target").(float64), } } } if policyCounter != 1 { return nil, fmt.Errorf("One policy must be defined for an autoscaler.") } return scaler, nil } func resourceComputeAutoscalerCreate(d *schema.ResourceData, meta interface{}) error { config := meta.(*Config) // Get the zone log.Printf("[DEBUG] Loading zone: %s", d.Get("zone").(string)) zone, err := config.clientCompute.Zones.Get( config.Project, d.Get("zone").(string)).Do() if err != nil { return fmt.Errorf( "Error loading zone '%s': %s", d.Get("zone").(string), err) } scaler, err := buildAutoscaler(d) if err != nil { return err } op, err := config.clientCompute.Autoscalers.Insert( config.Project, zone.Name, scaler).Do() if err != nil { return fmt.Errorf("Error creating Autoscaler: %s", err) } // It probably maybe worked, so store the ID now d.SetId(scaler.Name) // Wait for the operation to complete w := &OperationWaiter{ Service: config.clientCompute, Op: op, Project: config.Project, Type: OperationWaitZone, Zone: zone.Name, } state := w.Conf() state.Timeout = 2 * time.Minute state.MinTimeout = 1 * time.Second opRaw, err := state.WaitForState() if err != nil { return fmt.Errorf("Error waiting for Autoscaler to create: %s", err) } op = opRaw.(*compute.Operation) if op.Error != nil { // The resource didn't actually create d.SetId("") // Return the error return OperationError(*op.Error) } return resourceComputeAutoscalerRead(d, meta) } func resourceComputeAutoscalerRead(d *schema.ResourceData, meta interface{}) error { config := meta.(*Config) zone := d.Get("zone").(string) scaler, err := config.clientCompute.Autoscalers.Get( config.Project, zone, d.Id()).Do() if err != nil { if gerr, ok := err.(*googleapi.Error); ok && gerr.Code == 404 { // The resource doesn't exist anymore d.SetId("") return nil } return fmt.Errorf("Error reading Autoscaler: %s", err) } d.Set("self_link", scaler.SelfLink) return nil } func resourceComputeAutoscalerUpdate(d *schema.ResourceData, meta interface{}) error { config := meta.(*Config) zone := d.Get("zone").(string) scaler, err := buildAutoscaler(d) if err != nil { return err } op, err := config.clientCompute.Autoscalers.Patch( config.Project, zone, d.Id(), scaler).Do() if err != nil { return fmt.Errorf("Error updating Autoscaler: %s", err) } // It probably maybe worked, so store the ID now d.SetId(scaler.Name) // Wait for the operation to complete w := &OperationWaiter{ Service: config.clientCompute, Op: op, Project: config.Project, Type: OperationWaitZone, Zone: zone, } state := w.Conf() state.Timeout = 2 * time.Minute state.MinTimeout = 1 * time.Second opRaw, err := state.WaitForState() if err != nil { return fmt.Errorf("Error waiting for Autoscaler to update: %s", err) } op = opRaw.(*compute.Operation) if op.Error != nil { // Return the error return OperationError(*op.Error) } return resourceComputeAutoscalerRead(d, meta) } func resourceComputeAutoscalerDelete(d *schema.ResourceData, meta interface{}) error { config := meta.(*Config) zone := d.Get("zone").(string) op, err := config.clientCompute.Autoscalers.Delete( config.Project, zone, d.Id()).Do() if err != nil { return fmt.Errorf("Error deleting autoscaler: %s", err) } // Wait for the operation to complete w := &OperationWaiter{ Service: config.clientCompute, Op: op, Project: config.Project, Type: OperationWaitZone, Zone: zone, } state := w.Conf() state.Timeout = 2 * time.Minute state.MinTimeout = 1 * time.Second opRaw, err := state.WaitForState() if err != nil { return fmt.Errorf("Error waiting for Autoscaler to delete: %s", err) } op = opRaw.(*compute.Operation) if op.Error != nil { // Return the error return OperationError(*op.Error) } d.SetId("") return nil }