add enable_cgroup cluster config

src/share/parameter/ob_parameter_seed.ipp

@@ -1295,3 +1295,7 @@ DEF_STR_LIST(sanity_whitelist, OB_CLUSTER_PARAMETER, "", "vip who wouldn't leadi
 DEF_TIME(_advance_checkpoint_timeout, OB_CLUSTER_PARAMETER, "30m", "[10s,180m]",
          "the timeout for backup/migrate advance checkpoint Range: [10s,180m]",
          ObParameterAttr(Section::ROOT_SERVICE, Source::DEFAULT, EditLevel::DYNAMIC_EFFECTIVE));
+
+DEF_BOOL(enable_cgroup, OB_CLUSTER_PARAMETER, "True",
+         "when set to false, cgroup will not init; when set to true but cgroup root dir is not ready, print ERROR",
+         ObParameterAttr(Section::OBSERVER, Source::DEFAULT, EditLevel::STATIC_EFFECTIVE));

src/share/resource_manager/ob_cgroup_ctrl.cpp

@@ -40,7 +40,9 @@ ObCgSet ObCgSet::instance_;
 int ObCgroupCtrl::init()
 {
   int ret = OB_SUCCESS;
-  if (OB_FAIL(init_cgroup_root_dir_(root_cgroup_))) {
+  if (GCONF.enable_cgroup == false) {
+    // not init cgroup when config set to false
+  } else if (OB_FAIL(init_cgroup_root_dir_(root_cgroup_))) {
     LOG_WARN("init cgroup dir failed", K(ret), K(root_cgroup_));
   } else if (OB_FAIL(init_cgroup_dir_(other_cgroup_))) {
     LOG_WARN("init other cgroup dir failed", K(ret), K_(other_cgroup));

tools/deploy/mysql_test/test_suite/inner_table/r/mysql/all_virtual_sys_parameter_stat.result

@@ -64,6 +64,7 @@ devname
 disk_io_thread_count
 dtl_buffer_size
 enable_async_syslog
+enable_cgroup
 enable_ddl
 enable_early_lock_release
 enable_major_freeze