praefect: Add database read/write check

In order to check if praefect can read/write to a database, we can use
the hello_world table. We can try inserting a row, and reading from it.

Changelog: added

1 files changed, 1 insertions, 0 deletions

diff --git a/cmd/praefect/subcmd.go b/cmd/praefect/subcmd.go
index fc67c7471..df2539e45 100644
--- a/cmd/praefect/subcmd.go
+++ b/cmd/praefect/subcmd.go
@@ -46,6 +46,7 @@ var subcommands = map[string]subcmd{
 		os.Stdout,
 		praefect.NewPraefectMigrationCheck,
 		praefect.NewGitalyNodeConnectivityCheck,
+		praefect.NewPostgresReadWriteCheck,
 	),
 }