feat: add a new field to provide the ability of selecting a specific pool to work with DLE (#306)

Author: agneum

Diff for: configs/config.example.logical_generic.yml

@@ -90,6 +90,10 @@ poolManager:
   # Snapshots with this suffix are considered preliminary. They are not supposed to be accessible to end-users.
   preSnapshotSuffix: "_pre"
 
+  # Force selection of a working pool inside the `mountDir`.
+  # It is an empty string by default which means that the standard selection and rotation mechanism will be applied.
+  selectedPool: ""
+
 # Configure database containers
 databaseContainer: &db_container
   # Database Lab provisions thin clones using Docker containers and uses auxiliary containers.

Diff for: configs/config.example.logical_rds_iam.yml

@@ -90,6 +90,10 @@ poolManager:
   # Snapshots with this suffix are considered preliminary. They are not supposed to be accessible to end-users.
   preSnapshotSuffix: "_pre"
 
+  # Force selection of a working pool inside the `mountDir`.
+  # It is an empty string by default which means that the standard selection and rotation mechanism will be applied.
+  selectedPool: ""
+
 # Configure database containers
 databaseContainer: &db_container
   # Database Lab provisions thin clones using Docker containers and uses auxiliary containers.

Diff for: configs/config.example.physical_generic.yml

@@ -90,6 +90,10 @@ poolManager:
   # Snapshots with this suffix are considered preliminary. They are not supposed to be accessible to end-users.
   preSnapshotSuffix: "_pre"
 
+  # Force selection of a working pool inside the `mountDir`.
+  # It is an empty string by default which means that the standard selection and rotation mechanism will be applied.
+  selectedPool: ""
+
 # Configure PostgreSQL containers
 databaseContainer: &db_container
   # Database Lab provisions thin clones using Docker containers and uses auxiliary containers.

Diff for: configs/config.example.physical_walg.yml

@@ -90,6 +90,10 @@ poolManager:
   # Snapshots with this suffix are considered preliminary. They are not supposed to be accessible to end-users.
   preSnapshotSuffix: "_pre"
 
+  # Force selection of a working pool inside the `mountDir`.
+  # It is an empty string by default which means that the standard selection and rotation mechanism will be applied.
+  selectedPool: ""
+
 # Configure PostgreSQL containers
 databaseContainer: &db_container
   # Database Lab provisions thin clones using Docker containers and uses auxiliary containers.

Diff for: internal/provision/pool/pool_manager.go

@@ -6,6 +6,7 @@ package pool
 
 import (
 	"container/list"
+	"fmt"
 	"os"
 	"path"
 	"sync"
@@ -46,6 +47,7 @@ type Config struct {
 	SocketSubDir      string `yaml:"socketSubDir"`
 	ObserverSubDir    string `yaml:"observerSubDir"`
 	PreSnapshotSuffix string `yaml:"preSnapshotSuffix"`
+	SelectedPool      string `yaml:"selectedPool"`
 }
 
 // NewPoolManager creates a new pool manager.
@@ -266,6 +268,11 @@ func (pm *Manager) examineEntries(entries []os.DirEntry) (map[string]FSManager,
 
 		log.Msg("Discovering: ", dataPath)
 
+		if pm.cfg.SelectedPool != "" && pm.cfg.SelectedPool != entry.Name() {
+			log.Msg(fmt.Sprintf("Skip the entry %q as it doesn't match with the selected pool %s", entry.Name(), pm.cfg.SelectedPool))
+			continue
+		}
+
 		fsType, err := pm.getFSInfo(dataPath)
 		if err != nil {
 			log.Msg("failed to get a filesystem info: ", err.Error())