ServiceCommand: allow magic overrides

fixes #2560

application/clicommands/ServiceCommand.php

@@ -3,7 +3,9 @@
 namespace Icinga\Module\Director\Clicommands;
 
 use Icinga\Module\Director\Cli\ObjectCommand;
+use Icinga\Module\Director\DirectorObject\Lookup\ServiceFinder;
 use Icinga\Module\Director\Objects\IcingaHost;
+use RuntimeException;
 
 /**
  * Manage Icinga Services
@@ -13,6 +15,64 @@ use Icinga\Module\Director\Objects\IcingaHost;
  */
 class ServiceCommand extends ObjectCommand
 {
+    public function setAction()
+    {
+        if (($host = $this->params->get('host')) && $this->params->shift('allow-overrides')) {
+            $name = $this->getName();
+            $host = IcingaHost::load($host, $this->db());
+            $service = ServiceFinder::find($host, $name);
+            if ($service->requiresOverrides()) {
+                $this->params->shift('host');
+                if ($this->params->shift('replace')) {
+                    throw new RuntimeException('--replace is not available for Variable Overrides');
+                }
+                $appends = $this->stripPrefixedProperties($this->params, 'append-');
+                $remove = $this->stripPrefixedProperties($this->params, 'remove-');
+                $properties = $this->remainingParams();
+                self::assertVarsForOverrides($appends);
+                self::assertVarsForOverrides($remove);
+                self::assertVarsForOverrides($properties);
+                $current = $host->getOverriddenServiceVars($name);
+                foreach ($properties as $key => $value) {
+                    if ($key === 'vars') {
+                        foreach ($value as $k => $v) {
+                            $current->$k = $v;
+                        }
+                    } else {
+                        $current->{substr($key, 5)} = $value;
+                    }
+                }
+
+                if (! empty($appends)) {
+                    throw new RuntimeException('--append- is not available for Variable Overrides');
+                }
+                if (! empty($remove)) {
+                    throw new RuntimeException('--remove- is not available for Variable Overrides');
+                }
+                // Alternative, untested:
+                // $this->appendToArrayProperties($object, $appends);
+                // $this->removeProperties($object, $remove);
+
+                $host->overrideServiceVars($name, $current);
+                $this->persistChanges($host, 'Host', $host->getObjectName() . " (Overrides for $name)", 'modified');
+            }
+        }
+
+        parent::setAction();
+    }
+
+    protected static function assertVarsForOverrides($properties)
+    {
+        if (empty($properties)) {
+            return;
+        }
+
+        foreach ($properties as $key => $value) {
+            if ($key !== 'vars' && substr($key, 0, 5) !== 'vars.') {
+                throw new RuntimeException("Only Custom Variables can be set based on Variable Overrides");
+            }
+        }
+    }
 
     protected function load($name)
     {

doc/60-CLI.md

@@ -137,6 +137,7 @@ Use this command to modify specific properties of an existing Icinga object.
 | `--json`                   | Otherwise provide all options as a JSON string        |
 | `--replace`                | Replace all object properties with the given ones     |
 | `--auto-create`            | Create the object in case it does not exist           |
+| `--allow-overrides`        | Set variable overrides for virtual Services           |
 
 
 #### Examples

library/Director/Cli/ObjectCommand.php

@@ -4,6 +4,8 @@ namespace Icinga\Module\Director\Cli;
 
 use Icinga\Cli\Params;
 use Icinga\Exception\MissingParameterException;
+use Icinga\Module\Director\Data\Db\DbObject;
+use Icinga\Module\Director\Data\Exporter;
 use Icinga\Module\Director\IcingaConfig\IcingaConfig;
 use Icinga\Module\Director\Objects\IcingaObject;
 use InvalidArgumentException;
@@ -208,12 +210,17 @@ class ObjectCommand extends Command
 
         $this->appendToArrayProperties($object, $appends);
         $this->removeProperties($object, $remove);
+        $this->persistChanges($object, $this->getType(), $name, $action);
+    }
+
+    protected function persistChanges(DbObject $object, $type, $name, $action)
+    {
         if ($object->hasBeenModified() && $object->store()) {
-            printf("%s '%s' has been %s\n", $this->getType(), $this->name, $action);
+            printf("%s '%s' has been %s\n", $type, $name, $action);
             exit(0);
         }
 
-        printf("%s '%s' has not been modified\n", $this->getType(), $name);
+        printf("%s '%s' has not been modified\n", $type, $name);
         exit(0);
     }