global/overlay/etc/puppet/modules/cdn/files/l4lb/sunet-l4lb-namespace

@@ -15,7 +15,6 @@ mypy --strict sunet-l4lb-namespace
 
 import ipaddress
 import json
-import os
 import shlex
 import subprocess
 import sys
@@ -143,15 +142,6 @@ def setup_namespaces(netns_data: dict[str, dict[str, dict[str, list[str]]]]) ->
             # Make localhost available
             run_command(f"ip netns exec {namespace} ip link set lo up")
 
-        # (Re)load the nft ruleset for the given namespace
-        nft_ruleset = f"/opt/sunet-cdn/l4lb/conf/nft-{namespace}.conf"
-        if os.path.isfile(nft_ruleset):
-            run_command(f"ip netns exec {namespace} nft -f {nft_ruleset}")
-        else:
-            print(
-                f"WARNING: no nft ruleset found for namespace '{namespace}' ({nft_ruleset}), the namespace will not be firewalled"  # pylint: disable=line-too-long
-            )
-
         configure_interfaces(namespace, if_data)
 
 
@@ -185,24 +175,14 @@ def main() -> None:
         "/opt/sunet-cdn/l4lb/conf/netns-sunet-cdn-agent.json",
     ]
 
-    merged_netns_data: dict[str, dict[str, dict[str, list[str]]]] = {}
     for input_file in input_files:
         try:
             with open(input_file, encoding="utf-8") as f:
                 netns_data = json.load(f)
-
-            # Combine interface config from multiple files belonging to the same namespace
-            for ns, ns_data in netns_data.items():
-                if ns in merged_netns_data:
-                    merged_netns_data[ns].update(ns_data)
-                else:
-                    merged_netns_data[ns] = ns_data
-
         except FileNotFoundError:
             print(f"skipping nonexistant file '{input_file}'")
             continue
-
-    setup_namespaces(merged_netns_data)
+        setup_namespaces(netns_data)
 
 
 if __name__ == "__main__":

global/overlay/etc/puppet/modules/cdn/manifests/l4lb.pp

@@ -64,14 +64,6 @@ class cdn::l4lb(
     content => template('cdn/l4lb/netns-base.json.erb'),
   }
 
-  file { '/opt/sunet-cdn/l4lb/conf/nft-l4lb.conf':
-    ensure  => file,
-    owner   => 'root',
-    group   => 'root',
-    mode    => '0644',
-    content => template('cdn/l4lb/nft-l4lb.conf.erb'),
-  }
-
   file { '/usr/local/bin/sunet-l4lb-namespace':
     ensure  => file,
     owner   => 'root',

global/overlay/etc/puppet/modules/cdn/templates/l4lb/nft-l4lb.conf.erb

@@ -1,40 +0,0 @@
-#!/usr/sbin/nft -f
-
-flush ruleset
-
-table inet filter {
-        chain input {
-                type filter hook input priority 0; policy drop;
-
-                # accept any localhost traffic
-                iif lo counter accept
-
-                # accept icmp
-                ip protocol icmp counter accept
-                ip6 nexthdr icmpv6 icmpv6 type { destination-unreachable, packet-too-big, time-exceeded,
-                                                 parameter-problem, echo-request, mld-listener-query,
-                                                 nd-router-solicit, nd-router-advert, nd-neighbor-solicit,
-                                                 nd-neighbor-advert } counter accept
-
-                # accept traffic originated from us
-                ct state established counter accept
-                # silently drop invalid packets
-                ct state invalid counter drop
-        }
-        chain forward {
-                type filter hook forward priority 0; policy drop;
-        }
-        chain output {
-                type filter hook output priority 0;
-        }
-}
-
-# HTTP and HTTPS
-add rule inet filter input tcp dport 80 counter accept comment "l4lb HTTP"
-add rule inet filter input tcp dport 443 counter accept comment "l4lb HTTPS"
-
-# BGP
-add rule inet filter input ip saddr { 130.242.64.232 } tcp dport 179 counter accept comment "tug-r11-v4"
-add rule inet filter input ip saddr { 130.242.64.234 } tcp dport 179 counter accept comment "tug-r12-v4"
-add rule inet filter input ip6 saddr { 2001:6b0:2006:74:: } tcp dport 179 counter accept comment "tug-r11-v6"
-add rule inet filter input ip6 saddr { 2001:6b0:2006:75:: } tcp dport 179 counter accept comment "tug-r12-v6"