Add _total suffix to counter metrics, update changelog

Signed-off-by: Roman Vynar <roman.vynar@quiq.com>

Author: roman-vynar

CHANGELOG.md

@@ -10,6 +10,14 @@
 * [FEATURE]
 
 * [FEATURE] Add `tls.insecure-skip-verify` flag to ignore tls verification errors (PR #417) #348
+* [FEATURE] Add new metrics to `replication_group_member_stats` collector to support MySQL 8.x.
+
+### BREAKING CHANGES:
+
+Changes related to `replication_group_member_stats` collector:
+* metric "transaction_in_queue" was Counter instead of Gauge
+* renamed 3 metrics starting with `mysql_perf_schema_transaction_` to start with `mysql_perf_schema_transactions_` to be consistent with column names
+* exposing only server's own stats by matching MEMBER_ID with @@server_uuid resulting "member_id" label to be dropped.
 
 ## 0.12.1 / 2019-07-10
 

collector/perf_schema_replication_group_member_stats.go

@@ -37,25 +37,25 @@ var (
 			prometheus.NewDesc(prometheus.BuildFQName(namespace, performanceSchema, "transactions_in_queue"),
 				"The number of transactions in the queue pending conflict detection checks.", nil, nil)},
 		"COUNT_TRANSACTIONS_CHECKED": {prometheus.CounterValue,
-			prometheus.NewDesc(prometheus.BuildFQName(namespace, performanceSchema, "transactions_checked"),
+			prometheus.NewDesc(prometheus.BuildFQName(namespace, performanceSchema, "transactions_checked_total"),
 				"The number of transactions that have been checked for conflicts.", nil, nil)},
 		"COUNT_CONFLICTS_DETECTED": {prometheus.CounterValue,
-			prometheus.NewDesc(prometheus.BuildFQName(namespace, performanceSchema, "conflicts_detected"),
+			prometheus.NewDesc(prometheus.BuildFQName(namespace, performanceSchema, "conflicts_detected_total"),
 				"The number of transactions that have not passed the conflict detection check.", nil, nil)},
 		"COUNT_TRANSACTIONS_ROWS_VALIDATING": {prometheus.CounterValue,
-			prometheus.NewDesc(prometheus.BuildFQName(namespace, performanceSchema, "transactions_rows_validating"),
+			prometheus.NewDesc(prometheus.BuildFQName(namespace, performanceSchema, "transactions_rows_validating_total"),
 				"Number of transaction rows which can be used for certification, but have not been garbage collected.", nil, nil)},
 		"COUNT_TRANSACTIONS_REMOTE_IN_APPLIER_QUEUE": {prometheus.GaugeValue,
 			prometheus.NewDesc(prometheus.BuildFQName(namespace, performanceSchema, "transactions_remote_in_applier_queue"),
 				"The number of transactions that this member has received from the replication group which are waiting to be applied.", nil, nil)},
 		"COUNT_TRANSACTIONS_REMOTE_APPLIED": {prometheus.CounterValue,
-			prometheus.NewDesc(prometheus.BuildFQName(namespace, performanceSchema, "transactions_remote_applied"),
+			prometheus.NewDesc(prometheus.BuildFQName(namespace, performanceSchema, "transactions_remote_applied_total"),
 				"Number of transactions this member has received from the group and applied.", nil, nil)},
 		"COUNT_TRANSACTIONS_LOCAL_PROPOSED": {prometheus.CounterValue,
-			prometheus.NewDesc(prometheus.BuildFQName(namespace, performanceSchema, "transactions_local_proposed"),
+			prometheus.NewDesc(prometheus.BuildFQName(namespace, performanceSchema, "transactions_local_proposed_total"),
 				"Number of transactions which originated on this member and were sent to the group.", nil, nil)},
 		"COUNT_TRANSACTIONS_LOCAL_ROLLBACK": {prometheus.CounterValue,
-			prometheus.NewDesc(prometheus.BuildFQName(namespace, performanceSchema, "transactions_local_rollback"),
+			prometheus.NewDesc(prometheus.BuildFQName(namespace, performanceSchema, "transactions_local_rollback_total"),
 				"Number of transactions which originated on this member and were rolled back by the group.", nil, nil)},
 	}
 )