crimson: switch to SeaStore as default objectstore

* Introduce crimson_osd_objectstore with SeaStore as deafult. The global
  osd_objectstore which is used by both Classic and Crimson is defaulted
  to BlueStore.

Signed-off-by: Matan Breizman <[email protected]>

Author: Matan-B

src/common/options/crimson.yaml.in

@@ -2,6 +2,17 @@
 ---
 
 options:
+- name: crimson_osd_objectstore
+  type: str
+  level: advanced
+  desc: backend type for a Crimson OSD (e.g seastore or bluestore)
+  default: seastore
+  enum_values:
+  - bluestore
+  - seastore
+  - cyanstore
+  flags:
+  - create
 - name: crimson_osd_obc_lru_size
   type: uint
   level: advanced

src/crimson/osd/main.cc

@@ -202,7 +202,7 @@ int main(int argc, const char* argv[])
                                                    true);
           }
           auto store = crimson::os::FuturizedStore::create(
-            local_conf().get_val<std::string>("osd_objectstore"),
+            local_conf().get_val<std::string>("crimson_osd_objectstore"),
             local_conf().get_val<std::string>("osd_data"),
             local_conf().get_config_values());