SKALE-2738 Add sync schains option to the update procedure

README.md

@@ -179,6 +179,7 @@ skale node update
 
 Options:
 
+-   `--sync-schains` - run sChains in the backup recovery mode after restart
 -   `--yes` - remove without additional confirmation
 
 You can also specify a file with environment variables 

cli/node.py

@@ -153,12 +153,13 @@ def init_node(env_file, install_deps, dry_run):
 
 
 @node.command('update', help='De-register node from the SKALE Manager')
+@click.option('--sync-schains', is_flag=True)
 @click.option('--yes', is_flag=True, callback=abort_if_false,
               expose_value=False,
               prompt='Are you sure you want to update SKALE node software?')
 @click.argument('env_file')
-def update_node(env_file):
-    update(env_file)
+def update_node(sync_schains, env_file):
+    update(env_file, sync_schains)
     print('Waiting for transaction manager initialization ...')
     time.sleep(20)
 

core/node.py

@@ -118,7 +118,7 @@ def deregister():
     pass
 
 
-def update(env_filepath):
+def update(env_filepath, sync_schains):
     if env_filepath is not None:
         env_params = extract_env_params(env_filepath)
         if env_params is None:
@@ -133,12 +133,16 @@ def update(env_filepath):
         env_params['SGX_SERVER_URL']
     )
     flask_secret_key = get_flask_secret_key()
-    res_update_node = subprocess.run(['bash', UPDATE_SCRIPT], env={
+    update_cmd_env = {
         'SKALE_DIR': SKALE_DIR,
         'FLASK_SECRET_KEY': flask_secret_key,
         'DATAFILES_FOLDER': DATAFILES_FOLDER,
         **env_params
-    })
+    }
+    if sync_schains:
+        update_cmd_env['BACKUP_RUN'] = 'True'
+
+    res_update_node = subprocess.run(['bash', UPDATE_SCRIPT], env=update_cmd_env)
     logger.info(
         f'Update node script result: '
         f'{res_update_node.stderr}, {res_update_node.stdout}')