Enable loab balancer support for datasource (#121)

Signed-off-by: Vishal Anarse <vishal@civo.com>

civo/datasource_loadbalancer.go

@@ -0,0 +1,183 @@
+package civo
+
+import (
+	"fmt"
+	"log"
+	"strings"
+
+	"github.com/civo/civogo"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
+)
+
+// Data source to get from the api a specific Load Balancer
+// using the id or the hostname of the Load Balancer
+func dataSourceLoadBalancer() *schema.Resource {
+	return &schema.Resource{
+		Description: strings.Join([]string{
+			"Get information on a load balancer for use in other resources. This data source provides all of the load balancers properties as configured on your Civo account.",
+			"An error will be raised if the provided load balancer name does not exist in your Civo account.",
+		}, "\n\n"),
+		Read: dataSourceLoadBalancerRead,
+		Schema: map[string]*schema.Schema{
+			"id": {
+				Type:        schema.TypeString,
+				Optional:    true,
+				Description: "The id of the load balancer to retrieve (You can find this id from service annotations 'kubernetes.civo.com/loadbalancer-id')",
+			},
+			"name": {
+				Type:        schema.TypeString,
+				Optional:    true,
+				Description: "The name of the load balancer (You can find this name from service annotations 'kubernetes.civo.com/loadbalancer-name')",
+			},
+			"public_ip": {
+				Type:        schema.TypeString,
+				Computed:    true,
+				Description: "The public ip of the load balancer",
+			},
+			"algorithm": {
+				Type:        schema.TypeString,
+				Computed:    true,
+				Description: "The algorithm used by the load balancer",
+			},
+			"external_traffic_policy": {
+				Type:        schema.TypeString,
+				Computed:    true,
+				Description: "The external traffic policy of the load balancer",
+			},
+			"session_affinity": {
+				Type:        schema.TypeString,
+				Computed:    true,
+				Description: "The session affinity of the load balancer",
+			},
+			"session_affinity_config_timeout": {
+				Type:        schema.TypeInt,
+				Computed:    true,
+				Description: "The session affinity config timeout of the load balancer",
+			},
+			"enable_proxy_protocol": {
+				Type:        schema.TypeBool,
+				Computed:    true,
+				Description: "Whether the load balancer is configured to proxy protocol",
+			},
+			"private_ip": {
+				Type:        schema.TypeString,
+				Computed:    true,
+				Description: "The private ip of the load balancer",
+			},
+			"firewall_id": {
+				Type:        schema.TypeString,
+				Computed:    true,
+				Description: "The firewall id of the load balancer",
+			},
+			"cluster_id": {
+				Type:        schema.TypeString,
+				Computed:    true,
+				Description: "The cluster id of the load balancer",
+			},
+			"state": {
+				Type:        schema.TypeString,
+				Computed:    true,
+				Description: "The state of the load balancer",
+			},
+			"backends": {
+				Type:        schema.TypeList,
+				Computed:    true,
+				Description: "",
+				Elem: &schema.Resource{
+					Schema: map[string]*schema.Schema{
+						"ip": {
+							Type:        schema.TypeString,
+							Computed:    true,
+							Description: "The ip of the backend",
+						},
+						"protocol": {
+							Type:        schema.TypeString,
+							Computed:    true,
+							Description: "The protocol of the backend",
+						},
+						"source_port": {
+							Type:        schema.TypeInt,
+							Computed:    true,
+							Description: "The source port of the backend",
+						},
+						"target_port": {
+							Type:        schema.TypeInt,
+							Computed:    true,
+							Description: "The target port of the backend",
+						},
+						"health_check_port": {
+							Type:        schema.TypeInt,
+							Computed:    true,
+							Description: "The health check port of the backend",
+						},
+					},
+				},
+			},
+		},
+	}
+}
+
+func dataSourceLoadBalancerRead(d *schema.ResourceData, m interface{}) error {
+	apiClient := m.(*civogo.Client)
+
+	// overwrite the region if is define in the datasource
+	if region, ok := d.GetOk("region"); ok {
+		apiClient.Region = region.(string)
+	}
+
+	var searchBy string
+
+	if name, ok := d.GetOk("name"); ok {
+		log.Printf("[INFO] Getting the LoadBalancer by name")
+		searchBy = name.(string)
+	} else if id, ok := d.GetOk("id"); ok {
+		log.Printf("[INFO] Getting the LoadBalancer by id")
+		searchBy = id.(string)
+	}
+
+	lb, err := apiClient.FindLoadBalancer(searchBy)
+	if err != nil {
+		return fmt.Errorf("[ERR] failed to retrive LoadBalancer: %s", err)
+	}
+
+	d.SetId(lb.ID)
+	d.Set("name", lb.Name)
+	d.Set("public_ip", lb.PublicIP)
+	d.Set("algorithm", lb.Algorithm)
+	d.Set("external_traffic_policy", lb.ExternalTrafficPolicy)
+	d.Set("session_affinity", lb.SessionAffinity)
+	d.Set("session_affinity_config_timeout", lb.SessionAffinityConfigTimeout)
+	d.Set("enable_proxy_protocol", lb.EnableProxyProtocol)
+	d.Set("private_ip", lb.PrivateIP)
+	d.Set("firewall_id", lb.FirewallID)
+	d.Set("cluster_id", lb.ClusterID)
+	d.Set("state", lb.State)
+
+	if err := d.Set("backends", flattenLoadBalancerBackend(lb.Backends)); err != nil {
+		return fmt.Errorf("[ERR] error retrieving the backends for load balancer error: %#v", err)
+	}
+
+	return nil
+}
+
+// function to flatten the load balancer backend when is coming from the api
+func flattenLoadBalancerBackend(backend []civogo.LoadBalancerBackend) []interface{} {
+	if backend == nil {
+		return nil
+	}
+
+	flattenedBackend := make([]interface{}, len(backend))
+	for i, back := range backend {
+		rawRule := map[string]interface{}{
+			"ip":                back.IP,
+			"protocol":          back.Protocol,
+			"source_port":       back.SourcePort,
+			"target_port":       back.TargetPort,
+			"health_check_port": back.HealthCheckPort,
+		}
+
+		flattenedBackend[i] = rawRule
+	}
+
+	return flattenedBackend
+}

civo/provider.go

@@ -42,8 +42,8 @@ func Provider() *schema.Provider {
 			"civo_network":            dataSourceNetwork(),
 			"civo_volume":             dataSourceVolume(),
 			"civo_firewall":           dataSourceFirewall(),
-			// "civo_loadbalancer":       dataSourceLoadBalancer(),
-			"civo_ssh_key": dataSourceSSHKey(),
+			"civo_loadbalancer":       dataSourceLoadBalancer(),
+			"civo_ssh_key":            dataSourceSSHKey(),
 			// "civo_snapshot":           dataSourceSnapshot(),
 			"civo_region": dataSourceRegion(),
 		},