Add new datasource: Cloud IPs (#507)

* Add new datasource: Cloud IPs
Simply the list of IPs to allow, from https://grafana.com/docs/grafana-cloud/reference/allow-list/
Closes #314

* Fix linter

Author: julienduchesne

docs/data-sources/cloud_ips.md

@@ -0,0 +1,31 @@
+---
+# generated by https://github.com/hashicorp/terraform-plugin-docs
+page_title: "grafana_cloud_ips Data Source - terraform-provider-grafana"
+subcategory: ""
+description: |-
+  Data source for retrieving sets of cloud IPs. See https://grafana.com/docs/grafana-cloud/reference/allow-list/ for more info
+---
+
+# grafana_cloud_ips (Data Source)
+
+Data source for retrieving sets of cloud IPs. See https://grafana.com/docs/grafana-cloud/reference/allow-list/ for more info
+
+## Example Usage
+
+```terraform
+data "grafana_cloud_ips" "test" {}
+```
+
+<!-- schema generated by tfplugindocs -->
+## Schema
+
+### Read-Only
+
+- `hosted_alerts` (Set of String) Set of IP addresses that are used for hosted alerts.
+- `hosted_grafana` (Set of String) Set of IP addresses that are used for hosted Grafana.
+- `hosted_logs` (Set of String) Set of IP addresses that are used for hosted logs.
+- `hosted_metrics` (Set of String) Set of IP addresses that are used for hosted metrics.
+- `hosted_traces` (Set of String) Set of IP addresses that are used for hosted traces.
+- `id` (String) The ID of this resource.
+
+

examples/data-sources/grafana_cloud_ips/data-source.tf

@@ -0,0 +1 @@
+data "grafana_cloud_ips" "test" {}

grafana/data_source_cloud_ips.go

@@ -0,0 +1,97 @@
+package grafana
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+
+	"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
+)
+
+func DatasourceCloudIPs() *schema.Resource {
+	return &schema.Resource{
+		Description: "Data source for retrieving sets of cloud IPs. See https://grafana.com/docs/grafana-cloud/reference/allow-list/ for more info",
+		ReadContext: dataSourceCloudIPsRead,
+		Schema: map[string]*schema.Schema{
+			"hosted_alerts": {
+				Description: "Set of IP addresses that are used for hosted alerts.",
+				Type:        schema.TypeSet,
+				Computed:    true,
+				Elem: &schema.Schema{
+					Type: schema.TypeString,
+				},
+			},
+			"hosted_grafana": {
+				Description: "Set of IP addresses that are used for hosted Grafana.",
+				Type:        schema.TypeSet,
+				Computed:    true,
+				Elem: &schema.Schema{
+					Type: schema.TypeString,
+				},
+			},
+			"hosted_metrics": {
+				Description: "Set of IP addresses that are used for hosted metrics.",
+				Type:        schema.TypeSet,
+				Computed:    true,
+				Elem: &schema.Schema{
+					Type: schema.TypeString,
+				},
+			},
+			"hosted_traces": {
+				Description: "Set of IP addresses that are used for hosted traces.",
+				Type:        schema.TypeSet,
+				Computed:    true,
+				Elem: &schema.Schema{
+					Type: schema.TypeString,
+				},
+			},
+			"hosted_logs": {
+				Description: "Set of IP addresses that are used for hosted logs.",
+				Type:        schema.TypeSet,
+				Computed:    true,
+				Elem: &schema.Schema{
+					Type: schema.TypeString,
+				},
+			},
+		},
+	}
+}
+
+func dataSourceCloudIPsRead(ctx context.Context, d *schema.ResourceData, meta interface{}) diag.Diagnostics {
+	d.SetId("cloud_ips")
+	for attr, dataURL := range map[string]string{
+		"hosted_alerts":  "https://grafana.com/api/hosted-alerts/source-ips.txt",
+		"hosted_grafana": "https://grafana.com/api/hosted-grafana/source-ips.txt",
+		"hosted_metrics": "https://grafana.com/api/hosted-metrics/source-ips.txt",
+		"hosted_traces":  "https://grafana.com/api/hosted-traces/source-ips.txt",
+		"hosted_logs":    "https://grafana.com/api/hosted-logs/source-ips.txt",
+	} {
+		// nolint: gosec
+		resp, err := http.Get(dataURL)
+		if err != nil {
+			return diag.Errorf("error querying IPs for %s (%s): %v", attr, dataURL, err)
+		}
+		defer resp.Body.Close()
+
+		b, err := io.ReadAll(resp.Body)
+		if err != nil {
+			return diag.Errorf("error reading response body for %s (%s): %v", attr, dataURL, err)
+		}
+		var ipStr []string
+		for _, ip := range strings.Split(string(b), "\n") {
+			ip = strings.TrimSpace(ip)
+			if ip != "" {
+				ipStr = append(ipStr, ip)
+			}
+		}
+
+		if err := d.Set(attr, ipStr); err != nil {
+			return diag.FromErr(fmt.Errorf("error setting %s: %v", attr, err))
+		}
+	}
+
+	return nil
+}

grafana/data_source_cloud_ips_test.go

@@ -0,0 +1,50 @@
+package grafana
+
+import (
+	"fmt"
+	"net"
+	"strconv"
+	"strings"
+	"testing"
+
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/terraform"
+)
+
+func TestAccDataSourceCloudIPsRead(t *testing.T) {
+	t.Parallel()
+	CheckCloudAPITestsEnabled(t)
+
+	resource.Test(t, resource.TestCase{
+		ProviderFactories: testAccProviderFactories,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccExample(t, "data-sources/grafana_cloud_ips/data-source.tf"),
+				Check: func(s *terraform.State) error {
+					rs := s.RootModule().Resources["data.grafana_cloud_ips.test"]
+
+					for k, v := range rs.Primary.Attributes {
+						// Attributes have two parts, the count of a list and the list items
+						if strings.HasSuffix(k, ".#") {
+							// This is the count
+							intValue, err := strconv.Atoi(v)
+							if err != nil {
+								return fmt.Errorf("could not convert attribute %s (value: %s) to int: %s", k, v, err)
+							}
+							if intValue == 0 {
+								return fmt.Errorf("attribute %s is empty", k)
+							}
+						} else if k != "id" && k != "%" {
+							// Other items are IPs
+							if parsed := net.ParseIP(v); parsed == nil {
+								return fmt.Errorf("invalid IP in attribute %s: %s", k, v)
+							}
+						}
+					}
+
+					return nil
+				},
+			},
+		},
+	})
+}

grafana/provider.go

@@ -211,6 +211,7 @@ func Provider(version string) func() *schema.Provider {
 				"grafana_organization":  DatasourceOrganization(),
 
 				// Cloud
+				"grafana_cloud_ips":   DatasourceCloudIPs(),
 				"grafana_cloud_stack": DatasourceCloudStack(),
 
 				// Synthetic Monitoring