wait_online: add data source

Signed-off-by: Arthur Outhenin-Chalandre <arthur.outhenin-chalandre@cern.ch>

ceph/data_source_wait_online.go

@@ -0,0 +1,41 @@
+package ceph
+
+import (
+	"context"
+	"log"
+	"time"
+
+	"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
+)
+
+const (
+	maxDuration   = time.Hour
+	sleepDuration = time.Minute
+)
+
+func dataSourceWaitOnline() *schema.Resource {
+	return &schema.Resource{
+		Description: "This dummy resource is waiting to Ceph to be online for up to 1 hour. " +
+			"This is useful for example on a boostrap procedure.",
+		ReadContext: dataSourceWaitOnlineRead,
+		Schema:      map[string]*schema.Schema{},
+	}
+}
+
+func dataSourceWaitOnlineRead(ctx context.Context, d *schema.ResourceData, meta interface{}) diag.Diagnostics {
+	config := meta.(*Config)
+	startTime := time.Now()
+
+	for time.Since(startTime) < maxDuration {
+		_, err := config.GetCephConnection()
+		log.Printf("[DEBUG] Cannot connect to Ceph on ceph_wait_online: %s", err)
+		if err == nil {
+			log.Printf("[DEBUG] Ceph online on ceph_wait_online")
+			return nil
+		}
+		time.Sleep(sleepDuration)
+	}
+
+	return diag.Errorf("Error time out after trying to connect to Ceph many times")
+}

ceph/provider.go

@@ -34,9 +34,11 @@ func Provider() *schema.Provider {
 				Description: "List of mon to connect to Ceph. This is only used with `keyring`, otherwise it is ignored.",
 			},
 		},
-		DataSourcesMap: map[string]*schema.Resource{},
-		ResourcesMap:   map[string]*schema.Resource{},
-		ConfigureFunc:  providerConfigure,
+		DataSourcesMap: map[string]*schema.Resource{
+			"ceph_wait_online": dataSourceWaitOnline(),
+		},
+		ResourcesMap:  map[string]*schema.Resource{},
+		ConfigureFunc: providerConfigure,
 	}
 }
 

docs/data-sources/wait_online.md

@@ -0,0 +1,22 @@
+---
+# generated by https://github.com/hashicorp/terraform-plugin-docs
+page_title: "ceph_wait_online Data Source - terraform-provider-ceph"
+subcategory: ""
+description: |-
+  This dummy resource is waiting to Ceph to be online for up to 1 hour. This is useful for example on a boostrap procedure.
+---
+
+# ceph_wait_online (Data Source)
+
+This dummy resource is waiting to Ceph to be online for up to 1 hour. This is useful for example on a boostrap procedure.
+
+
+
+<!-- schema generated by tfplugindocs -->
+## Schema
+
+### Read-Only
+
+- `id` (String) The ID of this resource.
+
+