refactor: clean up unused code

The Traefik backup relies on the normal module-backup procedure. Saving
Traefik's data inside the cluster backup is no longer required.

core/imageroot/var/lib/nethserver/cluster/actions/restore-cluster/30load

@@ -80,28 +80,6 @@ rdb.set('cluster/backup_sequence', max_backup)
 if 'override' in dump['cluster'] and dump['cluster']['override']['modules']:
     rdb.hset(f'cluster/override/modules', mapping=dump['cluster']['override']['modules'])
 
-# Restore traefik configuration
-if 'leader' in dump['traefik']:
-    tk_instance = rdb.get('cluster/default_instance/traefik')
-    tk_state = f"{pwd.getpwnam(tk_instance).pw_dir}/.config/state"
-    tk_flags = f"{tk_state}/manual_flags"
-    tk_configs = f"{tk_state}/configs"
-    tk_certs = f"{tk_state}/custom_certificates"
-    os.makedirs(tk_flags, exist_ok=True)
-    os.makedirs(tk_certs, exist_ok=True)
-    os.makedirs(tk_configs, exist_ok=True)
-    for route in dump['traefik']['leader']['routes'].keys():
-        with open(f'{tk_flags}/{route}', 'w') as fpm:
-            pass
-        with open(f'{tk_configs}/{route}.yml', 'w') as fpr:
-            fpr.write(dump['traefik']['leader']['routes'][route])
-    for cert in dump['traefik']['leader']['uploaded_certificates'].keys():
-        with open(f'{tk_certs}/{cert}.key', 'w') as fpk:
-            fpk.write(dump['traefik']['leader']['uploaded_certificates'][cert]['key'])
-        with open(f'{tk_certs}/{cert}.crt', 'w') as fpc:
-            fpc.write(dump['traefik']['leader']['uploaded_certificates'][cert]['crt'])
-    agent.run_helper('chown', '-R', '-c', f"{tk_instance}:{tk_instance}", tk_state)
-
 # Restore subscription info, if present
 if 'subscription' in dump['cluster'] and dump['cluster']['subscription']:
     rdb.hset('cluster/subscription', mapping=dump['cluster']['subscription'])

core/imageroot/var/lib/nethserver/cluster/bin/cluster-backup

@@ -41,7 +41,7 @@ rdb = agent.redis_connect(host='127.0.0.1')
 
 VERSION = "3"
 
-dump = { 'version': VERSION, 'modules': {}, 'vpn': {}, 'cluster': { 'node_count': 0, 'subscription': {}, 'apply_updates': {}, 'repository': {}, 'backup': {}, 'backup_repository': {}, 'user_domain': { 'ldap': {} },'override': {'modules': {} } }, 'traefik': {} }
+dump = { 'version': VERSION, 'modules': {}, 'vpn': {}, 'cluster': { 'node_count': 0, 'subscription': {}, 'apply_updates': {}, 'repository': {}, 'backup': {}, 'backup_repository': {}, 'user_domain': { 'ldap': {} },'override': {'modules': {} } } }
 
 # cluster: number of nodes
 dump['cluster']['node_count'] = len(set(rdb.hvals('cluster/module_node')))
@@ -94,22 +94,7 @@ for m in rdb.scan_iter('module/*/backups'):
     dump['modules'][uuid] = {'backups': []}
     dump['modules'][uuid]['backups'] = sorted(rdb.smembers(m))
 
-# traefik: custom route and uploaded certificates
 leader_id = rdb.hget("cluster/environment", "NODE_ID")
-for tk in rdb.scan_iter('module/traefik*/flags'):
-    tk_instance = tk.removesuffix('/flags')
-    dump_task_result = agent.tasks.run(tk_instance, "dump-custom-config",
-        data={},
-         endpoint="redis://cluster-leader",
-    )
-
-    if dump_task_result['exit_code'] == 0:
-        # instance on leader has a special name used during restore
-        if rdb.hget(f'{tk_instance}/environment', 'NODE_ID') == leader_id:
-            tk_name = 'leader'
-        else:
-            tk_name = tk_instance.removeprefix('module/')
-        dump['traefik'][tk_name] = dump_task_result['output']
 
 # leader vpn endpoint, required to invoke the create-cluster
 dump['vpn']['endpoint'] = rdb.hget(f'node/{leader_id}/vpn', 'endpoint')