Consolidate nftables setup for alpine, debian and ceph roles

roles/alpine/tasks/main.yml

@@ -74,8 +74,8 @@
 
 - name: Set up firewall
   template:
-    dest: /etc/nftables.d/local.nft
-    src: local.nft.j2
+    dest: /etc/nftables.d/services.nft
+    src: services.nft.j2
   notify: reload nftables
 
 - name: Enable firewall

roles/ceph/tasks/firewall.yml

@@ -1,16 +0,0 @@
-- name: Install nftables
-  package:
-    name: nftables
-
-- name: Configure nftables
-  template:
-    dest: /etc/nftables.conf
-    src: nftables.conf.j2
-    mode: 0644
-  notify: reload nftables
-
-- name: Enable nftables
-  service:
-    name: nftables
-    enabled: true
-    state: started

roles/ceph/tasks/main.yml

@@ -3,6 +3,13 @@
     dest: /etc/hosts
     src: hosts.j2
 
+- name: Configure nftables
+  template:
+    dest: /etc/nftables.d/ceph.nft
+    src: ceph.nft.j2
+    mode: 0644
+  notify: reload nftables
+
 - name: Set up NTP servers
   lineinfile:
     path: /etc/systemd/timesyncd.conf
@@ -38,6 +45,4 @@
     dest: /usr/local/bin/cephadm
     mode: 0755
 
-- include_tasks: firewall.yml
-
 - include_tasks: cert.yml

roles/ceph/templates/ceph.nft.j2

@@ -1,7 +1,3 @@
-#!/usr/sbin/nft -f
-
-flush ruleset
-
 table inet filter {
     set cluster {
         type ipv4_addr; flags interval; auto-merge
@@ -27,25 +23,6 @@ table inet filter {
     }
 
     chain input {
-        type filter hook input priority filter; policy drop
-
-        ct state vmap { invalid : drop, established : accept, related : accept }
-        iif lo accept
-
-        ip protocol icmp icmp type {
-            echo-request, echo-reply, destination-unreachable,
-            parameter-problem, time-exceeded,
-        } accept comment "accept some ICMPv4"
-
-        ip6 nexthdr icmpv6 icmpv6 type {
-            echo-request, echo-reply, destination-unreachable,
-            packet-too-big, parameter-problem, time-exceeded,
-        } accept comment "accept some ICMPv6"
-
-        iif mgmt0 ip6 hoplimit 255 ip6 nexthdr icmpv6 icmpv6 type {
-            nd-neighbor-advert, nd-neighbor-solicit, nd-router-advert
-        } accept comment "accept IPv6 neighbor discovery"
-
         # BGP / BFD sessions
         iif lan0 ip6 saddr fe80::/64 accept
         iif lan1 ip6 saddr fe80::/64 accept
@@ -73,12 +50,4 @@ table inet filter {
 
 {% endfor %}
     }
-
-    chain forward {
-        type filter hook forward priority filter; policy accept
-    }
-
-    chain output {
-        type filter hook output priority filter; policy accept
-    }
 }

roles/debian/files/nftables.conf

@@ -0,0 +1,36 @@
+#!/usr/sbin/nft -f
+
+flush ruleset
+
+table inet filter {
+    chain input {
+        type filter hook input priority filter; policy drop
+
+        ct state vmap { invalid : drop, established : accept, related : accept }
+        iif lo accept
+
+        ip protocol icmp icmp type {
+            echo-request, echo-reply, destination-unreachable,
+            parameter-problem, time-exceeded,
+        } accept comment "accept some ICMPv4"
+
+        ip6 nexthdr icmpv6 icmpv6 type {
+            echo-request, echo-reply, destination-unreachable,
+            packet-too-big, parameter-problem, time-exceeded,
+        } accept comment "accept some ICMPv6"
+
+        ip6 hoplimit 255 ip6 nexthdr icmpv6 icmpv6 type {
+            nd-neighbor-advert, nd-neighbor-solicit, nd-router-advert, nd-router-solicit
+        } accept comment "accept IPv6 neighbor discovery"
+    }
+
+    chain forward {
+        type filter hook forward priority filter; policy drop
+    }
+
+    chain output {
+        type filter hook output priority filter; policy accept
+    }
+}
+
+include "/etc/nftables.d/*.nft"

roles/debian/handlers/main.yml

@@ -6,6 +6,12 @@
   command: ifreload -a
   when: "'handler' not in ansible_skip_tags"
 
+- name: reload nftables
+  service:
+    name: nftables
+    state: reloaded
+  when: "'handler' not in ansible_skip_tags"
+
 - name: reload sshd
   service:
     name: sshd

roles/debian/tasks/main.yml

@@ -21,6 +21,7 @@
     name:
       - git
       - ifupdown2
+      - nftables
       - rsync
       - vim
       - tmux
@@ -67,6 +68,29 @@
       value: 'prohibit-password'
   notify: reload sshd
 
+- name: Set up generic firewall rules
+  copy:
+    dest: /etc/nftables.conf
+    src: nftables.conf
+  notify: reload nftables
+
+- name: Create nftables include directory
+  file:
+    path: /etc/nftables.d
+    state: directory
+
+- name: Set up local firewall rules
+  template:
+    dest: /etc/nftables.d/services.nft
+    src: services.nft.j2
+  notify: reload nftables
+
+- name: Enable firewall
+  service:
+    name: nftables
+    enabled: yes
+    state: started
+
 - name: Run SSH instance in management VRF
   when: interfaces | selectattr('vrf') | selectattr('vrf.name', '==', 'mgmt')
   block:
@@ -90,4 +114,4 @@
         enabled: yes
       notify: reboot
 
-- meta: flush_handlers
+    - meta: flush_handlers