mononoke/mysql: group ODS counters by shardmap

Summary:
Grouping stats by the shardmap can help to detect and root-cause issues.
This diffs adds a label to the `MysqlConnection` and Mononoke now will log counters by shardmap.

Reviewed By: StanislavGlebik

Differential Revision: D26994369

fbshipit-source-id: 0708a4b0dc3762f5f9152b83200173cd8b241abc

eden/mononoke/blobstore/factory/src/sql.rs

@@ -112,6 +112,7 @@ impl MetadataSqlFactory {
                         self.fb,
                         global_connection_pool.clone(),
                         pool_config.clone(),
+                        label,
                         config.primary.db_address.clone(),
                         self.mysql_options.read_connection_type(),
                         self.readonly.0,

eden/mononoke/blobstore/sqlblob/src/lib.rs

@@ -66,6 +66,8 @@ const SQLITE_SHARD_NUM: NonZeroUsize = nonzero!(2_usize);
 const SINGLE_SHARD_NUM: NonZeroUsize = nonzero!(1_usize);
 const GC_GENERATION_PATH: &str = "scm/mononoke/xdb_gc/default";
 
+const SQLBLOB_LABEL: &str = "blobstore";
+
 // Test setup data
 const UPDATE_FREQUENCY: Duration = Duration::from_millis(1);
 const INITIAL_VERSION: u64 = 0;
@@ -117,7 +119,7 @@ impl Sqlblob {
                     port,
                     read_con_type,
                     PoolSizeConfig::for_sharded_connection(),
-                    "blobstore".into(),
+                    SQLBLOB_LABEL.into(),
                     readonly,
                 ))
                 .into_future()
@@ -153,7 +155,7 @@ impl Sqlblob {
                     port,
                     read_con_type,
                     PoolSizeConfig::for_sharded_connection(),
-                    "blobstore".into(),
+                    SQLBLOB_LABEL.into(),
                     readonly,
                 ))
                 .into_future()
@@ -186,6 +188,7 @@ impl Sqlblob {
             fb,
             global_connection_pool,
             pool_config,
+            SQLBLOB_LABEL.into(),
             shardmap.clone(),
             0..shard_count,
             read_con_type,
@@ -254,6 +257,7 @@ impl Sqlblob {
                     fb,
                     global_connection_pool.clone(),
                     pool_config,
+                    SQLBLOB_LABEL.into(),
                     db_address.clone(),
                     read_con_type,
                     readonly,

eden/mononoke/common/rust/sql_ext/src/oss.rs

@@ -76,6 +76,7 @@ pub fn create_mysql_connections_unsharded(
     _fb: FacebookInit,
     _connection_pool: SharedConnectionPool,
     _pool_config: PoolConfig,
+    _label: String,
     _tier: String,
     _read_con_type: ReadConnectionType,
     _readonly: bool,
@@ -97,6 +98,7 @@ pub fn create_mysql_connections_sharded<S>(
     _fb: FacebookInit,
     _connection_pool: SharedConnectionPool,
     _pool_config: PoolConfig,
+    _label: String,
     _shardmap: String,
     _shards: S,
     _read_con_type: ReadConnectionType,