Make "bin/storage destroy" target individual hosts in database cluster mode

Summary:
Ref T13336. Currently, "bin/storage destroy" destroys every master. This is wonderfully destructive, but if replication fails it's useful to be able to destroy only a replica.

Operate on a single host, and require "--host" to target the operation in cluster mode, so `bin/storage destroy --host dbreplica001` is a useful operation.

Test Plan: Ran `bin/storage destroy` with various flags locally. Will destroy `secure002` and refresh replication.

Maniphest Tasks: T13336

Differential Revision: https://secure.phabricator.com/D20784

src/infrastructure/cluster/PhabricatorDatabaseRef.php

@@ -221,6 +221,9 @@ final class PhabricatorDatabaseRef
     return $this->replicaRefs;
   }
 
+  public function getDisplayName() {
+    return $this->getRefKey();
+  }
 
   public function getRefKey() {
     $host = $this->getHost();

src/infrastructure/storage/management/PhabricatorStorageManagementAPI.php

@@ -89,6 +89,10 @@ final class PhabricatorStorageManagementAPI extends Phobject {
     return $this->namespace.'_'.$fragment;
   }
 
+  public function getDisplayName() {
+    return $this->getRef()->getDisplayName();
+  }
+
   public function getDatabaseList(array $patches, $only_living = false) {
     assert_instances_of($patches, 'PhabricatorStoragePatch');
 

src/infrastructure/storage/management/workflow/PhabricatorStorageManagementDestroyWorkflow.php

@@ -21,41 +21,59 @@ final class PhabricatorStorageManagementDestroyWorkflow
   }
 
   public function didExecute(PhutilArgumentParser $args) {
-    $console = PhutilConsole::getConsole();
+    $api = $this->getSingleAPI();
+
+    $host_display = $api->getDisplayName();
 
     if (!$this->isDryRun() && !$this->isForce()) {
       if ($args->getArg('unittest-fixtures')) {
-        $console->writeOut(
-          phutil_console_wrap(
-            pht(
+        $warning = pht(
           'Are you completely sure you really want to destroy all unit '.
-              'test fixure data? This operation can not be undone.')));
+          'test fixure data on host "%s"? This operation can not be undone.',
+          $host_display);
+
+        echo tsprintf(
+          '%B',
+          id(new PhutilConsoleBlock())
+            ->addParagraph($warning)
+            ->drawConsoleString());
+
         if (!phutil_console_confirm(pht('Destroy all unit test data?'))) {
-          $console->writeOut("%s\n", pht('Cancelled.'));
+          $this->logFail(
+            pht('CANCELLED'),
+            pht('User cancelled operation.'));
           exit(1);
         }
       } else {
-        $console->writeOut(
-          phutil_console_wrap(
-            pht(
+        $warning = pht(
           'Are you completely sure you really want to permanently destroy '.
-              'all storage for Phabricator data? This operation can not be '.
-              'undone and your data will not be recoverable if you proceed.')));
+          'all storage for Phabricator data on host "%s"? This operation '.
+          'can not be undone and your data will not be recoverable if '.
+          'you proceed.',
+          $host_display);
+
+        echo tsprintf(
+          '%B',
+          id(new PhutilConsoleBlock())
+            ->addParagraph($warning)
+            ->drawConsoleString());
 
         if (!phutil_console_confirm(pht('Permanently destroy all data?'))) {
-          $console->writeOut("%s\n", pht('Cancelled.'));
+          $this->logFail(
+            pht('CANCELLED'),
+            pht('User cancelled operation.'));
           exit(1);
         }
 
         if (!phutil_console_confirm(pht('Really destroy all data forever?'))) {
-          $console->writeOut("%s\n", pht('Cancelled.'));
+          $this->logFail(
+            pht('CANCELLED'),
+            pht('User cancelled operation.'));
           exit(1);
         }
       }
     }
 
-    $apis = $this->getMasterAPIs();
-    foreach ($apis as $api) {
     $patches = $this->getPatches();
 
     if ($args->getArg('unittest-fixtures')) {
@@ -76,15 +94,24 @@ final class PhabricatorStorageManagementDestroyWorkflow
       $databases[] = $api->getDatabaseName('directory');
     }
 
+    asort($databases);
+
     foreach ($databases as $database) {
       if ($this->isDryRun()) {
-          $console->writeOut(
-            "%s\n",
-            pht("DRYRUN: Would drop database '%s'.", $database));
+        $this->logInfo(
+          pht('DRY RUN'),
+          pht(
+            'Would drop database "%s" on host "%s".',
+            $database,
+            $host_display));
       } else {
-          $console->writeOut(
-            "%s\n",
-            pht("Dropping database '%s'...", $database));
+        $this->logWarn(
+          pht('DESTROY'),
+          pht(
+            'Dropping database "%s" on host "%s"...',
+            $database,
+            $host_display));
+
         queryfx(
           $api->getConn(null),
           'DROP DATABASE IF EXISTS %T',
@@ -93,12 +120,11 @@ final class PhabricatorStorageManagementDestroyWorkflow
     }
 
     if (!$this->isDryRun()) {
-        $console->writeOut(
-          "%s\n",
+      $this->logOkay(
+        pht('DONE'),
         pht(
           'Storage on "%s" was destroyed.',
-            $api->getRef()->getRefKey()));
-      }
+          $host_display));
     }
 
     return 0;