bgp: T7760: remove per vrf instance system-as node

VyOS 1.5 and onwards will no longer have the following CLI node available:
  set vrf name <name> protocols bgp system-as <asn>

1 files changed, 30 insertions, 0 deletions

diff --git a/src/migration-scripts/bgp/7-to-8 b/src/migration-scripts/bgp/7-to-8
new file mode 100644
index 000000000..ced4f837e
--- /dev/null
+++ b/src/migration-scripts/bgp/7-to-8
@@ -0,0 +1,30 @@
+#!/usr/bin/env python3
+#
+# Copyright VyOS maintainers and contributors <maintainers@vyos.io>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# T7760: Remove per VRF setting for system-as option in VyOS 1.5 and onwards
+
+from vyos.configtree import ConfigTree
+
+def migrate(config: ConfigTree) -> None:
+    vrf_base = ['vrf', 'name']
+    if not config.exists(vrf_base):
+        return
+
+    for vrf in config.list_nodes(vrf_base):
+        # bail out early if there is no per VRF BGP instance defined
+        vrf_bgp_base = vrf_base + [vrf, 'protocols', 'bgp']
+        if config.exists(vrf_bgp_base + ['system-as']):
+            config.delete(vrf_bgp_base + ['system-as'])