Print debug from shards, too

docker/shard/bin/setup

@@ -13,6 +13,11 @@ host   all       all       all           trust
 EOF
 
 cat >> /var/lib/postgresql/$POSTGRES_VERSION/main/postgresql.conf <<-EOF
+logging_collector = on
+log_min_messages = info
+log_statement = 'all'
+log_directory = '/var/log/postgresql/'
+log_filename = 'postgresql-13-main.log'
 listen_addresses = '*'
 port = 6432
 max_prepared_transactions = 5

test/feature/spqr_test.go

@@ -92,6 +92,20 @@ func (tctx *testContext) saveLogs(scenario string) error {
 		var logsToSave map[string]string
 		switch {
 		case strings.HasPrefix(service, spqrShardName):
+			for file := range postgresqlLogsToSave {
+				remoteFile, err := tctx.composer.GetFile(service, file)
+				if err != nil {
+					errs = append(errs, err)
+					continue
+				}
+				content, err := io.ReadAll(remoteFile)
+				if err != nil {
+					errs = append(errs, err)
+					continue
+				}
+				fmt.Printf("\"%s\" shard logs:\n", service)
+				fmt.Println(string(content))
+			}
 			logsToSave = postgresqlLogsToSave
 		case strings.HasPrefix(service, spqrRouterName):
 			for file := range routerLogsToSave {