feat: Add Infrahub Jinja2 transforms for MLAG configuration (#22) #26

2026-03-01T11:05:05Z

Damien commented

2026-03-01 11:05:05 +00:00

Summary

Closes #22. Implements Infrahub Jinja2 transforms for MLAG configuration, generating Arista-native YANG-compatible JSON payloads from Infrahub intent data.

File	Description
`infrahub/transforms/queries/mlag_intent.gql`	GraphQL query — fetches `InfraMlagPeerConfig` by `$device_name`, including MLAG domain attributes, peer/iBGP VLANs, local interface SVI, and peer-link LAG
`infrahub/transforms/templates/mlag_yang.j2`	Jinja2 template — renders a JSON object targeting `/arista-mlag-augments:mlag/config`; returns `[]` for devices with no MLAG (spines)
`infrahub/transforms/tests/mlag_yang/test.yml`	Test spec: smoke check + unit render tests for `leaf1` and `spine1`
`infrahub/transforms/tests/mlag_yang/leaf1/`	Mock input + expected output for leaf1 (full MLAG config, domain `leafs-1-2`)
`infrahub/transforms/tests/mlag_yang/spine1/`	Mock input (empty edges) + expected output `[]` for spine1
`.infrahub.yml`	Registers `mlag_intent` query and `mlag_yang_transform` jinja2 transform

Output shape (leaf1)

{
  "mlag": {
    "config": {
      "domain-id": "leafs-1-2",
      "peer-link": "Port-Channel999",
      "local-interface": "Vlan4090",
      "peer-address": "10.0.199.255",
      "shutdown": false
    },
    "dual_primary_detection": {
      "enabled": true,
      "delay": 10,
      "action": "errdisable",
      "heartbeat_peer_ip": "172.16.0.50",
      "heartbeat_vrf": "mgmt"
    },
    "virtual_mac": "c001.cafe.babe",
    "peer_vlan_id": 4090,
    "ibgp_vlan_id": 4091,
    "local_interface_ip": "10.0.199.254/31"
  }
}

Validation

infrahubctl render mlag_yang_transform device_name=leaf1   # → MLAG config JSON
infrahubctl render mlag_yang_transform device_name=spine1  # → []

Design notes

Follows identical conventions to existing transforms (#20 VLAN/interface/VXLAN, #21 VRF/L3VNI)
All optional relationship accesses wrapped in is defined and is not none guards
Spine/non-MLAG devices return [] (empty array) — consistent with the "no data → empty collection" pattern used in vxlan_yang for devices without VTEP

🤖 Generated with Claude Code

## Summary Closes #22. Implements Infrahub Jinja2 transforms for MLAG configuration, generating Arista-native YANG-compatible JSON payloads from Infrahub intent data. | File | Description | |------|-------------| | `infrahub/transforms/queries/mlag_intent.gql` | GraphQL query — fetches `InfraMlagPeerConfig` by `$device_name`, including MLAG domain attributes, peer/iBGP VLANs, local interface SVI, and peer-link LAG | | `infrahub/transforms/templates/mlag_yang.j2` | Jinja2 template — renders a JSON object targeting `/arista-mlag-augments:mlag/config`; returns `[]` for devices with no MLAG (spines) | | `infrahub/transforms/tests/mlag_yang/test.yml` | Test spec: smoke check + unit render tests for `leaf1` and `spine1` | | `infrahub/transforms/tests/mlag_yang/leaf1/` | Mock input + expected output for leaf1 (full MLAG config, domain `leafs-1-2`) | | `infrahub/transforms/tests/mlag_yang/spine1/` | Mock input (empty edges) + expected output `[]` for spine1 | | `.infrahub.yml` | Registers `mlag_intent` query and `mlag_yang_transform` jinja2 transform | ## Output shape (leaf1) ```json { "mlag": { "config": { "domain-id": "leafs-1-2", "peer-link": "Port-Channel999", "local-interface": "Vlan4090", "peer-address": "10.0.199.255", "shutdown": false }, "dual_primary_detection": { "enabled": true, "delay": 10, "action": "errdisable", "heartbeat_peer_ip": "172.16.0.50", "heartbeat_vrf": "mgmt" }, "virtual_mac": "c001.cafe.babe", "peer_vlan_id": 4090, "ibgp_vlan_id": 4091, "local_interface_ip": "10.0.199.254/31" } } ``` ## Validation ```bash infrahubctl render mlag_yang_transform device_name=leaf1 # → MLAG config JSON infrahubctl render mlag_yang_transform device_name=spine1 # → [] ``` ## Design notes - Follows identical conventions to existing transforms (#20 VLAN/interface/VXLAN, #21 VRF/L3VNI) - All optional relationship accesses wrapped in `is defined and is not none` guards - Spine/non-MLAG devices return `[]` (empty array) — consistent with the "no data → empty collection" pattern used in vxlan_yang for devices without VTEP 🤖 Generated with [Claude Code](https://claude.com/claude-code)

Damien added 1 commit 2026-03-01 11:05:05 +00:00

feat: Add Infrahub Jinja2 transform for MLAG configuration (#22 ) 21e79e3536

- Add GraphQL query mlag_intent.gql: queries InfraMlagPeerConfig by
  device name, returning local IP, peer address, heartbeat peer IP,
  MLAG domain (domain-id, virtual-mac, heartbeat VRF, dual-primary
  detection settings, peer/iBGP VLANs, peer devices), local interface
  SVI name, and peer-link LAG name
- Add Jinja2 template mlag_yang.j2: renders a JSON object targeting
  Arista-native YANG path /arista-mlag-augments:mlag/config; returns
  empty array [] for devices with no MLAG config (spines); all optional
  relationship accesses guarded with 'is defined and is not none' checks
- Update .infrahub.yml: register mlag_intent query and mlag_yang_transform
- Add unit test fixtures for leaf1 (full MLAG config) and spine1 (empty
  response → []) following jinja2-transform-unit-render format

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Damien merged commit cf7da535ed into main

2026-03-01 11:06:56 +00:00

Damien referenced this issue from a commit

2026-03-01 11:06:57 +00:00

feat: Add Infrahub Jinja2 transforms for MLAG configuration (#22) (#26)

Damien deleted branch feat/infrahub-transforms-mlag

2026-03-01 11:07:02 +00:00

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Reference: Damien/arista-evpn-vxlan-clab#26