fix: lower node mtu for registry egress

2026-05-02 01:40:26 +00:00
parent 0aba186d8b
commit 0874553582
2 changed files with 26 additions and 0 deletions
@@ -17,6 +17,31 @@
    )
  when: cloud_init_binary.rc == 0

+- name: Persist primary interface MTU for registry egress
+  copy:
+    dest: /etc/netplan/99-k8s-mtu.yaml
+    content: |
+      network:
+        version: 2
+        ethernets:
+          {{ ansible_default_ipv4.interface | default('eth0') }}:
+            mtu: {{ common_node_mtu }}
+    mode: "0600"
+  register: k8s_mtu_netplan
+  when: common_node_mtu | int > 0
+
+- name: Apply primary interface MTU immediately
+  command: ip link set dev {{ ansible_default_ipv4.interface | default('eth0') }} mtu {{ common_node_mtu }}
+  changed_when: false
+  when: common_node_mtu | int > 0
+
+- name: Apply persisted MTU netplan
+  command: netplan apply
+  changed_when: true
+  when:
+    - common_node_mtu | int > 0
+    - k8s_mtu_netplan.changed
+
 - name: Update apt cache
  apt:
    update_cache: true