Groups and Subgroups
Extension lifecycle — from development to production
An SNMP extension organizes polling into groups and subgroups:
snmp:
- group: Device Health # Top-level group
interval:
minutes: 1
dimensions:
- key: device.address
value: this:device.address
metrics: # Scalar metrics (device-level)
- key: my-ext.cpu
value: oid:1.3.6.1.4.1.9.9.109.1.1.1.1.8.1
type: gauge
subgroups:
- subgroup: Interfaces # Table metrics (per-interface)
table: true
dimensions:
- key: if.name
value: oid:1.3.6.1.2.1.31.1.1.1.1
metrics:
- key: my-ext.if.in.octets.count
value: oid:1.3.6.1.2.1.2.2.1.10
type: count
⚠️ DED018 — the #1 extension bug: Never mix table OIDs from different SNMP tables in the same subgroup. Each subgroup = one SNMP table.
Feature Sets
Feature sets let users choose which metrics to enable. Group your metrics logically:
snmp:
- group: Device Health
featureSet: health # Users can enable/disable this
...
- group: Interface Traffic
featureSet: interfaces # Separate toggle for interfaces
...
🛠 Try it: When activating an extension in the Hub, look for the "Feature sets" section — you'll see checkboxes for each feature set you defined.
Limits
Resource Limit
────────────────────────── ─────
Groups per extension 10
Subgroups per group 10
Monitoring configs 100
Extension versions stored 10 (1 active)