Merging GC related config values

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 IMPROVEMENTS:
   * core: Update Serf and Memberlist for more reliable gossip [GH-2255]
+  * client: Apply GC related configurations properly [GH-2273]
   * client: Reproducible Node ID on OSes that provide system-level UUID
     [GH-2277]
   * server/vault: Vault Client on Server handles SIGHUP to reload configs

command/agent/config.go

@@ -901,6 +901,15 @@ func (a *ClientConfig) Merge(b *ClientConfig) *ClientConfig {
 	if b.Reserved != nil {
 		result.Reserved = result.Reserved.Merge(b.Reserved)
 	}
+	if b.GCInterval != 0 {
+		result.GCInterval = b.GCInterval
+	}
+	if b.GCDiskUsageThreshold != 0 {
+		result.GCDiskUsageThreshold = b.GCDiskUsageThreshold
+	}
+	if b.GCInodeUsageThreshold != 0 {
+		result.GCInodeUsageThreshold = b.GCInodeUsageThreshold
+	}
 
 	// Add the servers
 	result.Servers = append(result.Servers, b.Servers...)

command/agent/config_test.go

@@ -197,6 +197,9 @@ func TestConfig_Merge(t *testing.T) {
 				ReservedPorts:       "2,10-30,55",
 				ParsedReservedPorts: []int{1, 2, 3},
 			},
+			GCInterval:            6 * time.Second,
+			GCDiskUsageThreshold:  71,
+			GCInodeUsageThreshold: 86,
 		},
 		Server: &ServerConfig{
 			Enabled:           true,