mirror of
https://github.com/kevinveenbirkenbach/computer-playbook.git
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77 lines
2.8 KiB
YAML
77 lines
2.8 KiB
YAML
---
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- name: "🔍 Read the peer state of every interface"
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ansible.builtin.command: "wg show {{ mesh_name | quote }} peers"
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loop: "{{ WIREGUARD_MESH_NAMES }}"
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loop_control:
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loop_var: mesh_name
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register: wireguard_peer_state
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changed_when: false
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- name: "🛑 Fail when an interface carries no peer"
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ansible.builtin.fail:
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msg: >-
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WireGuard interface '{{ item.mesh_name }}' on {{ inventory_hostname }}
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came up with no peer. The mesh in this host's inventory is incomplete.
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loop: "{{ wireguard_peer_state.results }}"
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loop_control:
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label: "{{ item.mesh_name }}"
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when: (item.stdout | trim) | length == 0
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- name: "⏳ Wait until every dialling interface has handshaked with its peers"
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ansible.builtin.command: "wg show {{ mesh_name | quote }} latest-handshakes"
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loop: "{{ WIREGUARD_SPOKE_MESH_NAMES }}"
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loop_control:
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loop_var: mesh_name
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register: wireguard_handshakes
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changed_when: false
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failed_when: false
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retries: 24
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delay: 5
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until:
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- wireguard_handshakes.rc | default(1) == 0
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- wireguard_handshakes.stdout | default('', true) | trim | length > 0
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- wireguard_handshakes.stdout is not search('\t0')
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- name: "🛑 Fail hard when a dialling interface never reached a peer"
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ansible.builtin.fail:
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msg: >-
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WireGuard interface '{{ item.mesh_name }}' on {{ inventory_hostname }}
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never completed a handshake with every peer it dials. No deploy can
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proceed over a partitioned mesh.
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loop: "{{ wireguard_handshakes.results | default([]) }}"
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loop_control:
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label: "{{ item.mesh_name }}"
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when: >-
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item.rc | default(1) != 0
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or (item.stdout | default('', true) | trim | length) == 0
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or (item.stdout | default('', true)) is search('\t0')
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- name: "🔍 Check whether ping is available for the MTU probe"
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ansible.builtin.stat:
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path: "{{ WIREGUARD_PING_BINARY }}"
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register: wireguard_ping
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- name: "📏 Prove the path carries a full-size payload without fragmenting"
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ansible.builtin.command: >-
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{{ WIREGUARD_PING_BINARY }} -c 2 -W 2 -M do
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-s {{ wireguard_overlay_mtu | int - 28 }} {{ item | quote }}
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loop: "{{ WIREGUARD_EXPECTED_PEERS }}"
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register: wireguard_mtu_probe
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changed_when: false
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failed_when: false
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when: wireguard_ping.stat.exists
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- name: "🛑 Fail when the overlay MTU does not survive the tunnel"
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ansible.builtin.fail:
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msg: >-
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A {{ wireguard_overlay_mtu | int }}-byte payload does not reach
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{{ oversized | map(attribute='item') | join(', ') }} from
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{{ inventory_hostname }}. Stacked VXLAN inside WireGuard needs the
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overlay MTU at or below the tunnel's, or large payloads drop silently.
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vars:
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oversized: >-
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{{ wireguard_mtu_probe.results | default([])
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| rejectattr('skipped', 'defined')
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| rejectattr('rc', 'equalto', 0) | list }}
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when: oversized | length > 0
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