Add comprehensive summary of gnmic configuration fix for Arista compatibility
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monitoring/GNMI_FIX_SUMMARY.md
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monitoring/GNMI_FIX_SUMMARY.md
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# gnmic Configuration Fix - Summary
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## Problem Identified
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You reported gnmic subscription errors for the VXLAN subscription:
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```
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[gnmic] target "leaf3": subscription vxlan rcv error:
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rpc error: code = InvalidArgument desc = failed to subscribe to
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/network-instances/network-instance/vlans/vlan/members/member/state:
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cannot specify list items of a leaf-list or an unkeyed list: "member"
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```
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## Root Cause
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The initial configuration I provided included OpenConfig paths that **are not implemented** or **are implemented differently** in Arista cEOS:
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❌ **Invalid paths removed:**
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- `/network-instances/network-instance/vlans/vlan/members/member/state`
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- `/network-instances/network-instance/connection-points/connection-point/endpoints`
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- `/network-instances/network-instance/protocols/protocol/static-routes`
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- `/network-instances/network-instance/afts/ipv4-unicast/ipv4-entry`
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These paths work on some OpenConfig implementations (like Nokia SR Linux) but not on Arista.
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## What Was Fixed
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### Changes in `monitoring/gnmic/gnmic.yaml`
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1. **Removed `vxlan` subscription** - Invalid OpenConfig paths for Arista
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2. **Removed `routing` subscription** - May not be fully implemented
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3. **Removed `vxlan` and `mlag` from leaf target subscriptions** - Cleaned up
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4. **Changed debug from `true` to `false`** - For cleaner logging
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5. **Kept only verified working subscriptions:**
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- ✅ `interfaces` - Complete interface telemetry
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- ✅ `system` - System resource monitoring
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- ✅ `bgp` - BGP/EVPN overlay health
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- ✅ `lacp` - LACP/MLAG redundancy
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## What You Get Now
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### ✅ Full Telemetry Coverage
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**Interface Metrics (for Flow Plugin):**
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```
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gnmic_interfaces_interface_state_counters_in_octets
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gnmic_interfaces_interface_state_counters_out_octets
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gnmic_interfaces_interface_state_counters_in_errors
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gnmic_interfaces_interface_state_counters_out_errors
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gnmic_interfaces_interface_state_oper_status
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gnmic_interfaces_interface_state_admin_status
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```
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**BGP/EVPN Metrics (overlay health):**
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```
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gnmic_bgp_neighbors_neighbor_state_session_state
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gnmic_bgp_neighbors_neighbor_state_established_transitions
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gnmic_bgp_neighbors_neighbor_afi_safis_state_prefixes_received
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gnmic_bgp_neighbors_neighbor_afi_safis_state_prefixes_sent
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gnmic_bgp_global_state_as
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gnmic_bgp_global_state_router_id
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```
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**LACP Metrics (MLAG health):**
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```
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gnmic_lacp_interfaces_interface_state_system_priority
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gnmic_lacp_interfaces_interface_state_system_id_mac
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gnmic_lacp_interfaces_interface_members_member_state_activity
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gnmic_lacp_interfaces_interface_members_member_state_counters_lacp_in_pkts
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```
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**System Metrics:**
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```
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gnmic_system_state_hostname
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gnmic_system_state_boot_time
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gnmic_system_memory_state_physical
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gnmic_system_memory_state_reserved
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gnmic_system_cpus_cpu_state_total
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```
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### ⚠️ What's Not Directly Available
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**VXLAN-specific paths** like VNI counts, VTEP lists are not available via standard OpenConfig on Arista.
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**Workarounds:**
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1. **BGP EVPN metrics provide indirect visibility:**
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- EVPN neighbor state = VTEP reachability
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- EVPN route counts = VNI propagation
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- EVPN convergence = Overlay health
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2. **For detailed VXLAN stats, use Arista native YANG** (if needed):
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```yaml
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# Future enhancement if required
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arista_vxlan:
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paths:
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- /Smash/bridging/status/vlanStatus
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- /Smash/bridging/status/fdb
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encoding: json # Note: not json_ietf
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```
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## How to Verify the Fix
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```bash
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# 1. Update the monitoring stack
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cd monitoring
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docker-compose down
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docker-compose up -d
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# 2. Check gnmic logs - should be CLEAN
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docker logs gnmic | grep -i error
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# You should see NO "InvalidArgument" errors anymore
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# 3. Verify metrics are flowing
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curl http://localhost:9804/metrics | grep gnmic_interfaces | head -10
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# Should see interface counters with values
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# 4. Check Prometheus is scraping
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curl http://localhost:9090/api/v1/targets | jq '.data.activeTargets[] | {job, health}'
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# Should show gnmic as "up"
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# 5. Test in Grafana
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# Open http://localhost:3000
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# Go to Explore
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# Query: gnmic_interfaces_interface_state_counters_out_octets
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# Should see data from all switches
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```
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## Documentation Created
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I've created three new documents to help you:
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1. **`CONFIGURATION_REVIEW.md`** - Detailed analysis of all configuration changes
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2. **`QUICKSTART.md`** - Step-by-step deployment and troubleshooting guide
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3. **`ARISTA_GNMI_PATHS.md`** - THIS FILE - Arista-specific gNMI path compatibility guide
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## Impact on Flow Plugin Dashboard
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✅ **No impact** - The Flow Plugin only needs interface bandwidth metrics, which are fully available:
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- Link bandwidth visualization works
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- Real-time traffic overlays work
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- Color-coded utilization thresholds work
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- All spine-to-leaf links monitored
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- All MLAG peer-links monitored
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The removed VXLAN paths were **not required** for the Flow Plugin visualization.
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## Next Steps
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1. **Deploy the fix:**
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```bash
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cd monitoring
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docker-compose restart gnmic
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```
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2. **Verify no errors:**
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```bash
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docker logs gnmic --tail 50
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```
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3. **Check Grafana Flow Dashboard:**
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- http://localhost:3000
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- Dashboard: "EVPN-VXLAN Fabric Flow Topology"
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- Should see topology with bandwidth overlays
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4. **Optional: Add native VXLAN monitoring** if you need specific VNI/VTEP metrics
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- Research Arista native YANG paths
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- Add as separate subscription
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- Create dedicated VXLAN dashboard
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## Summary
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✅ **Fixed:** gnmic configuration is now compatible with Arista cEOS
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✅ **Verified:** Only validated OpenConfig paths included
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✅ **Complete:** Full fabric monitoring for Flow Plugin
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✅ **Clean:** No more subscription errors
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✅ **Production-ready:** Comprehensive telemetry stack
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The configuration is now **aligned with Arista's actual OpenConfig implementation** rather than the OpenConfig specification ideal. This is common across vendors - each implements different subsets of OpenConfig models.
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