feat: add ability to set global properties

Not all properties can be set globally, and the "appName" in the global case is currently defaulted to `--global`. This is okay because domain label names cannot start with hyphens, and all app names must be valid domain label names.

plugins/logs/logs.go

@@ -11,6 +11,9 @@ var (
 	DefaultProperties = map[string]string{
 		"vector-sink": "",
 	}
+
+	// GlobalProperties is a map of all valid global logs properties
+	GlobalProperties = map[string]bool{}
 )
 
 const VectorImage = "timberio/vector:0.11.X-debian"

plugins/logs/subcommands.go

@@ -75,7 +75,7 @@ func CommandSet(appName string, property string, value string) error {
 		}
 	}
 
-	common.CommandPropertySet("logs", appName, property, value, DefaultProperties)
+	common.CommandPropertySet("logs", appName, property, value, DefaultProperties, GlobalProperties)
 	if property == "vector-sink" {
 		common.LogVerboseQuiet(fmt.Sprintf("Writing updated vector config to %s", filepath.Join(common.MustGetEnv("DOKKU_LIB_ROOT"), "data", "logs", "vector.json")))
 		return writeVectorConfig()