Render SONiC config_db.json directly without using sonic-cfggen

partition/roles/sonic/README.md

@@ -17,7 +17,8 @@ It depends on the `switch_facts` module from `ansible-common`, so make sure modu
 | sonic_mgmtif_gateway                                       |           | If using a fixed management IP, the default gateway for the management interface.                                    |
 | sonic_ip_masquerade                                        |           | Enable ip masquerading on eth0.                                                                                      |
 | sonic_breakouts                                            |           | The breakout configuration for ports, e.g. `dict('Ethernet0'='4x25G')`                                               |
-| sonic_ports                                                |           | Special configuration for ports (mtu, fec, have highest precedence)                                                  |
+| sonic_config_action                                        |           | Either `load` or `reload`. In the latter case all services will be restarted. If not given, defaults to `load`       |
+| sonic_ports                                                |           | Configuration for ports (mtu, fec, have highest precedence). These ports will be up by default.                      |
 | sonic_ports.name                                           |           | The port name.                                                                                                       |
 | sonic_ports.speed                                          |           | Speed of the port.                                                                                                   |
 | sonic_ports.mtu                                            |           | MTU of the port.                                                                                                     |
@@ -42,7 +43,7 @@ It depends on the `switch_facts` module from `ansible-common`, so make sure modu
 | sonic_vlans.ip                                             |           | The IP of the SVI of this VLAN.                                                                                      |
 | sonic_vlans.dhcp_servers                                   |           | DHCP servers to relay to.                                                                                            |
 | sonic_vlans.untagged_ports                                 |           | Array of untagged ports to bind to this VLAN.                                                                        |
-| sonic_vlans.tagged_ports                                   |           | Array of tagged ports to bind to this VLAN.                                                                        |
+| sonic_vlans.tagged_ports                                   |           | Array of tagged ports to bind to this VLAN.                                                                          |
 | sonic_vlans.vrf                                            |           | The VRF to bind the VLANs SVI to.                                                                                    |
 | sonic_vteps                                                |           | VTEPs to configure. If defined FRR will automatically advertise all VNIs.                                            |
 | sonic_vteps.comment                                        |           | Description for the VTEP.                                                                                            |

partition/roles/sonic/defaults/main.yaml

@@ -4,15 +4,13 @@ sonic_ntpservers: []
 sonic_nameservers: []
 sonic_ip_masquerade: false
 sonic_timezone: Europe/Berlin
+sonic_config_action: load
 
 ## Physical settings
 sonic_breakouts: {}
 sonic_ports: []
-#- name: Ethernet50
-#  speed: 10000
-sonic_ports_default_speed: 10000
-sonic_ports_default_mtu: 9216
-sonic_ports_default_fec: none 
+sonic_ports_dict: {}
+sonic_ports_default_fec: none
 
 ## BGP related settings
 sonic_loopback_address:
@@ -44,4 +42,4 @@ sonic_frr_static_routes_mgmt: []
 sonic_interconnects: {}
 
 sonic_interconnects_default_peer_group: EXTERNAL
-sonic_interconnects_default_bgp_timers: '1 3'
+sonic_interconnects_default_bgp_timers: '1 3'

partition/roles/sonic/handlers/main.yaml

@@ -3,25 +3,16 @@
   systemd:
     daemon_reload: yes
 
-- name: write metal conf to db
-  ansible.builtin.command: sonic-cfggen --yaml /etc/sonic/metal.yaml --write-to-db
-  notify: config save
-
-- name: config save
-  ansible.builtin.command: config save -y
-
-- name: restart bgp
-  systemd:
-    name: bgp
-    state: restarted
-
 - name: restart caclmgrd
   systemd:
     name: caclmgrd
     state: restarted
 
+- name: config load
+  ansible.builtin.command: config load --yes
+
 - name: config reload
-  ansible.builtin.command: config reload -y
+  ansible.builtin.command: config reload --yes
   async: 120
   poll: 0
   notify: wait for new connection
@@ -32,3 +23,8 @@
     sleep: 5
     delay: 30
     timeout: 300
+
+- name: restart bgp
+  systemd:
+    name: bgp
+    state: restarted

partition/roles/sonic/tasks/main.yaml

@@ -10,10 +10,25 @@
       - sonic_mgmt_vrf is defined
       - sonic_loopback_address is defined
       - sonic_asn is defined
+      - sonic_config_action in ['load', 'reload']
       - sonic_ntpservers is defined
       - sonic_nameservers is defined
       - metal_stack_switch_os_is_sonic
 
+- name: Check mandatory variables on non-empty sonic_ports are set
+  assert:
+    fail_msg: "default port configuration is necessary on non-empty sonic_ports"
+    quiet: yes
+    that:
+      - sonic_ports_default_speed
+      - sonic_ports_default_mtu
+  when: sonic_ports
+
+- name: Populate sonic_ports_dict
+  set_fact:
+    sonic_ports_dict: "{{ sonic_ports_dict|default({}) | combine( {item.name: item} ) }}"
+  loop: "{{ sonic_ports }}"
+
 - name: render resolv.conf
   template:
     src: resolv.conf.j2
@@ -53,13 +68,47 @@
   with_dict: "{{ sonic_breakouts }}"
   when: sonic_breakouts is defined
 
-- name: Render metal config for config_db.json
-  template:
-    src: metal.yaml.j2
-    dest: /etc/sonic/metal.yaml
-  notify:
-  - write metal conf to db
-  - config reload
+- name: Delete deprecated metal.yaml
+  ansible.builtin.file:
+    path: "/etc/sonic/metal.yaml"
+    state: absent
+
+- name: Get running configuration
+  ansible.builtin.command: show runningconfiguration all
+  register: sonic_running_cfg_result
+  changed_when: false
+
+- name: Parse running configuration
+  ansible.builtin.set_fact:
+    sonic_running_cfg: "{{ sonic_running_cfg_result.stdout | from_json }}"
+
+- name: Extract running configuration for breakouts and ports
+  ansible.builtin.set_fact:
+    sonic_running_cfg_breakouts: "{{ sonic_running_cfg | community.general.json_query('BREAKOUT_CFG') }}"
+    sonic_running_cfg_hwsku: "{{ sonic_running_cfg | community.general.json_query('DEVICE_METADATA.localhost.hwsku') }}"
+    sonic_running_cfg_mac: "{{ sonic_running_cfg | community.general.json_query('DEVICE_METADATA.localhost.mac') }}"
+    sonic_running_cfg_platform: "{{ sonic_running_cfg | community.general.json_query('DEVICE_METADATA.localhost.platform') }}"
+    sonic_running_cfg_ports: "{{ sonic_running_cfg | community.general.json_query('PORT')  }}"
+
+- name: Fail if running configuration doesn't contain required information
+  ansible.builtin.assert:
+    that:
+      - sonic_running_cfg_breakouts
+      - sonic_running_cfg_hwsku
+      - sonic_running_cfg_mac
+      - sonic_running_cfg_platform
+      - sonic_running_cfg_ports
+    fail_msg: The running configuration is incomplete because it does not contain 'BREAKOUT_CFG', 'PORT', or complete 'DEVICE_METADATA'.
+
+- name: Render config_db
+  set_fact:
+    config_db: "{{ lookup('template', 'metal.yaml.j2') }}"
+
+- name: Save config_db as JSON file
+  copy:
+    content: "{{ config_db | from_yaml | to_nice_json }}"
+    dest: /etc/sonic/config_db.json
+  notify: "config {{ sonic_config_action }}"
 
 - name: Set NTP timezone
   timezone:

partition/roles/sonic/templates/metal.yaml.j2

@@ -4,6 +4,9 @@ DEVICE_METADATA:
   localhost:
     docker_routing_config_mode: split
     hostname: "{{ inventory_hostname }}"
+    hwsku: "{{ sonic_running_cfg_hwsku }}"
+    mac: "{{ sonic_running_cfg_mac }}"
+    platform: "{{ sonic_running_cfg_platform }}"
     type: "LeafRouter"
     frr_mgmt_framework_config: "true"
 
@@ -35,40 +38,60 @@ MGMT_INTERFACE:
 {% endif %}
 
 {% endif %}
+MGMT_PORT:
+  eth0:
+    alias: "eth0"
+    admin_status: "up"
+    description: "Management Port"
+
 MGMT_VRF_CONFIG:
   vrf_global:
     mgmtVrfEnabled: "{{ sonic_mgmt_vrf | lower }}"
-{% if sonic_ports|length > 0 %}
+{% if sonic_ports_dict|length > 0 %}
 
 INTERFACE:
-  {% for port in sonic_ports %}
-  {% if port.name in sonic_bgp_ports|default([]) or port.vrf is defined %}
-  {{ port.name }}:
-    {% if port.name in sonic_bgp_ports|default([]) %}
+  {% for name, port in sonic_ports_dict.items() %}
+  {% if name in sonic_bgp_ports|default([]) or port.vrf is defined %}
+  {{ name }}:
+    {% if name in sonic_bgp_ports|default([]) %}
     ipv6_use_link_local_only: enable
     {% endif %}
     {% if port.vrf is defined %}
     vrf_name: "{{ port.vrf }}"
     {% endif %}
   {% elif port.ips is defined %}
-  {{ port.name }}: {}
+  {{ name }}: {}
   {% endif %}
   {% for ip in port.ips|default([]) %}
-  {{ port.name }}|{{ ip }}: {}
+  {{ name }}|{{ ip }}: {}
   {% endfor %}
   {% endfor %}
 {% endif %}
-{% if sonic_ports|length > 0 %}
+
+BREAKOUT_CFG:
+  {% for name, cfg in sonic_running_cfg_breakouts.items() %}
+  {{ name }}:
+    brkout_mode: "{{ cfg.brkout_mode }}"
+  {% endfor %}
 
 PORT:
-  {% for port in sonic_ports %}
-  {{ port.name }}:
+  {% for name, running_cfg in sonic_running_cfg_ports.items() %}
+  {{ name }}:
+    alias: {{ running_cfg.alias }}
+    autoneg: "{{ running_cfg.autoneg|default("off")|string|lower }}"
+    index: "{{ running_cfg.index }}"
+    lanes: "{{ running_cfg.lanes }}"
+    parent_port: {{ running_cfg.parent_port }}
+    {% if sonic_ports_dict[name] is defined %}
+    {% set port = sonic_ports_dict[name] %}
     admin_status: up
     speed: "{{ port.speed|default(sonic_ports_default_speed) }}"
     mtu: "{{ port.mtu|default(sonic_ports_default_mtu) }}"
     fec: "{{ port.fec|default(sonic_ports_default_fec)|string|lower }}"
+    {% else %}
+    speed: "{{ running_cfg.speed }}"
+    {% endif %}
   {% endfor %}
-{% endif %}
 {% if sonic_vlans is defined and sonic_vlans|length > 0 %}
 
 VLAN:

partition/roles/sonic/test/data/exit/input.yaml

@@ -6,25 +6,68 @@ sonic_loopback_address: 10.0.0.1
 sonic_breakouts:
   Ethernet0: "4x10G"
 
-sonic_ports:
-- name: Ethernet0
-  speed: 10000
-  mtu: 1500
-  vrf: VrfMpls
-  ips:
-  - 10.0.0.2/32
-# Uplink for pxe VLAN
-- name: Ethernet1
-  speed: 10000
-- name: Ethernet2
-  speed: 10000
-- name: Ethernet3
-  speed: 10000
-  ips:
-  - 10.1.2.2/30
+sonic_ports_default_mtu: 9216
+sonic_ports_default_speed: 100000
+sonic_ports_dict:
+  Ethernet0:
+    speed: 10000
+    mtu: 1500
+    vrf: VrfMpls
+    ips:
+    - 10.0.0.2/32
 # spine uplinks
-- name: Ethernet112
-- name: Ethernet116
+  Ethernet112:
+  Ethernet116:
+
+sonic_running_cfg_breakouts:
+  Ethernet0:
+    brkout_mode: "4x10G"
+  Ethernet112:
+    brkout_mode: "1x100G[40G]"
+  Ethernet116:
+    brkout_mode: "1x100G[40G]"
+
+sonic_running_cfg_hwsku: Accton-AS7726-32X
+sonic_running_cfg_mac: e0:01:a6:e3:29:3c
+sonic_running_cfg_platform: x86_64-accton_as7726_32x-r0
+
+sonic_running_cfg_ports:
+  Ethernet0:
+    alias: Eth1/1(Port1)
+    index: "1"
+    lanes: "1"
+    parent_port: Ethernet0
+    speed: "10000"
+  Ethernet1:
+    alias: Eth1/2(Port1)
+    index: "1"
+    lanes: "2"
+    parent_port: Ethernet0
+    speed: "10000"
+  Ethernet2:
+    alias: Eth1/3(Port1)
+    index: "1"
+    lanes: "3"
+    parent_port: Ethernet0
+    speed: "10000"
+  Ethernet3:
+    alias: Eth1/4(Port1)
+    index: "1"
+    lanes: "4"
+    parent_port: Ethernet0
+    speed: "10000"
+  Ethernet112:
+    alias: Eth29(Port29)
+    index: "29"
+    lanes: "113,114,115,116"
+    parent_port: Ethernet112
+    speed: "100000"
+  Ethernet116:
+    alias: Eth30(Port30)
+    index: "30"
+    lanes: "117,118,119,120"
+    parent_port: Ethernet116
+    speed: "100000"
 
 sonic_bgp_ports:
 - Ethernet112