Add admin CLI scan command for unsupported workflows

Makefile

@@ -330,3 +330,9 @@ gen-internal-types:
 	go run common/types/generator/main.go
 
 internal-types: gen-internal-types fmt copyright
+
+start-mysql: bins
+	./cadence-server --zone mysql start
+
+start-mysql: bins
+	./cadence-server --zone postgres start

RELEASES.md

@@ -0,0 +1,50 @@
+# Releases upgrade instruction
+
+## Upgrade to 0.16 and above
+
+**TL;DR:** If your Cadence service is running on or above 0.14.0 and you do not have workflows running for more than 6 months. It is safe to upgrade without any operations.
+
+If your cluster has open workflows for more than 6 months, please download and run the following CLI command prior to the upgrades.
+
+Prior to release 0.16, the workflow state structure contains a field called replication state. Instead, we introduce a new field 'version histories' 
+to manage the replication. In release 0.16, this field 'replication state' has been removed from the code path.
+From release 0.14, the field 'replication state' has been deprecated. If you are upgrading the service from version below 0.14.0 to 0.16.0 or 
+you may have workflows running for more than 6 months, please consider follow the instruction to see if you have any unsupported workflows.
+
+## Detect unsupported open workflows
+
+Run the following command based on your database.
+
+Cassandra:
+
+`cadence admin db unsupported-workflow --db_type=cassandra --db_address <db address> --db_port <port number> --username=<username> --password=<password> --keyspace <keyspace> --lower_shard_bound=<the start shard id> --upper_shard_bound=<the end shard id> --rps <scan rps> --output_filename ./cadence_scan`
+
+MySQL/Postgres:
+
+`cadence admin db unsupported-workflow --db_type=<mysql/postgres> --db_address <db address> --db_port <port number> --username=<username> --password=<password> --db_name <database name> --lower_shard_bound=<the start shard id> --upper_shard_bound=<the end shard id> --rps <scan rps> --output_filename ./cadence_scan`
+
+**Note:** This CLI is a long-running process to scan the database for unsupported workflows.
+If you have TLS configurations or use customized encoding/decoding type. Please use
+
+`cadence adm db unsupported-workflow --help`
+
+to configurate the correct connection.
+
+
+After the CLI completes, a list of unsupported workflows will be listed in the file `cadence_scan`.
+
+For example:
+
+`cadence --address <host>:<port> --domain <ee7316ab-2e42-4f3c-86ee-344a4299791c> workflow reset --wid helloworld_7f2fa1fe-594e-44ad-a9e2-7ac7c5f97861 --rid e79ce972-b657-48a4-bba9-e2f2ac6424e2 --reset_type LastDecisionCompleted --reason 'release 0.16 upgrade'`
+
+## Reset the workflow 
+
+Use reset CLI to reset these unsupported workflow. This operation is to migrate these unsupported workflow data.
+
+1. replace the host and port with your cadence host address and port number.
+2. replace the domain uuid with the domain name.
+To find the domain name, you can use `cadence --address <host>:<port> domain describe --domain_id=<domain uuid>`.
+
+After replacing the fields with the correct values, you can copy/paste to run the CLI. This is going to reset those workflows to the last decision task completed event.
+
+**Note:** If your workflows has outstanding child workflows, you have to wait for these child workflows completion or terminate the workflows.

cmd/tools/cli/main.go

@@ -24,6 +24,8 @@ import (
 	"fmt"
 	"os"
 
+	_ "github.com/uber/cadence/common/persistence/sql/sqlplugin/mysql"    // needed to load mysql plugin
+	_ "github.com/uber/cadence/common/persistence/sql/sqlplugin/postgres" // needed to load postgres plugin
 	"github.com/uber/cadence/tools/cli"
 )