Infraspec Reference

Complete field reference for infraspec.yaml.

Top-Level Fields

Field	Type	Required	Description
name	string	yes	App identifier (used as Nomad job ID, Consul service prefix)
deploy	bool	no	Set false to disable deploys for this app
repo	RepoSpec	no	Git repository configuration
build	BuildSpec	no	Docker build configuration
processes	map[string]Process	yes	Named process definitions
services	string[]	no	Legacy service list (v1 compat)
secrets	string[]	no	Expected secret key names
migrations	string	no	Path to migrations directory (relative to repo root)
env	map[string]string	no	Static environment variables
infrastructure	Infrastructure	no	Backing service declarations
endpoints	Endpoint[]	no	External URL mappings
volumes	VolumeSpec[]	no	Host volume mounts
snapshots	SnapshotPolicy	no	Snapshot retention defaults
deployPolicy	DeployPolicy	no	Deploy safety policy such as auto-rollback

Process

Each key in the processes map is the process name. The process type is inferred from which fields are set.

Field	Type	Default	Description
port	int	—	Listen port (makes this a service process)
command	string	—	Override the Docker CMD
schedule	string	—	Cron expression (makes this a periodic batch job)
function	FunctionSpec	—	Function configuration (makes this a batch job)
health	HealthSpec	—	HTTP health check (only for processes with a port)
metrics	MetricsSpec	—	Prometheus scrape endpoint for this process
scaling	Scaling	—	Instance count and autoscaling
drain	Drain	—	Graceful shutdown configuration
resources	Resources	cpu: 100, memory: 128	CPU (MHz) and memory (MB) limits
tuning	TuningPolicy	—	Advisory resource tuning policy and signal declarations
canary	CanaryConfig	—	Canary allocation count and evaluation window

Health

Field	Type	Default	Description
path	string	—	HTTP health check path (e.g. /health)
interval	string	10s	Check interval (Go duration)
timeout	string	5s	Check timeout (Go duration)

MetricsSpec

Field	Type	Default	Description
enabled	bool	false	Register this process as a Prometheus scrape target
path	string	/metrics	Metrics path
port	int	process port	Internal metrics port when separate from the main process port

Scaling

Field	Type	Default	Description
min	int	1	Minimum instance count
max	int	—	Maximum instance count (for autoscaling)
per_region	int	—	Instances per region
auto	AutoScale	—	Autoscaling configuration

AutoScale

Field	Type	Description
metric	string	Scaling metric: cpu, memory, kafka_lag, custom
target	int	Target value for the metric
topic	string	Kafka topic (required when metric is kafka_lag)

Drain

Field	Type	Default	Description
signal	string	SIGTERM	Signal sent to the process on shutdown
timeout	string	—	Time to wait after signal before force-killing

Resources

Field	Type	Default	Description
cpu	int	100	CPU allocation in MHz
memory	int	128	Memory allocation in MB

TuningPolicy

tuning declares how Norn should interpret resource signals for a process. The first implementation is advisory: norn tune and /api/tuning/recommendations report current signals and recommended resources or scaling changes, but they do not mutate Nomad jobs.

processes:
  web:
    resources:
      cpu: 25
      memory: 256
    tuning:
      mode: advisory
      cooldown: 6h
      profiles:
        quiet:
          cpu: 25
          memory: 256
          scale: 1
        normal:
          cpu: 50
          memory: 512
          scale: 1
      limits:
        min:
          cpu: 25
          memory: 128
          scale: 1
        max:
          cpu: 500
          memory: 2048
          scale: 3
      signals:
        - name: live-rss
          source: nomad
          metric: memory_rss
          aggregate: current
        - name: memory-p95
          source: prometheus
          metric: container_memory_working_set_bytes
          window: 24h
          aggregate: p95

Field	Type	Default	Description
mode	string	advisory	advisory reports recommendations; auto is reserved for future guarded application
cooldown	duration	—	Minimum interval between automated changes when auto mode is implemented
profiles	map[string]TuningProfile	—	Named target CPU, memory, and scale profiles such as quiet or busy
limits	TuningLimits	—	Minimum and maximum recommendation bounds
signals	TuningSignal[]	built-in Nomad live signals	Signal declarations used to explain recommendations

TuningProfile

Field	Type	Description
cpu	int	CPU allocation in MHz
memory	int	Memory allocation in MB
scale	int	Desired instance count

TuningLimits

Field	Type	Description
min	TuningProfile	Lower bound for recommended CPU, memory, and scale
max	TuningProfile	Upper bound for recommended CPU, memory, and scale

TuningSignal

Field	Type	Description
name	string	Human-readable signal name
source	string	nomad, prometheus, or app
metric	string	Signal metric, such as memory_rss, memory_max, or cpu_percent
window	duration	Lookback window for historical sources
aggregate	string	Aggregation such as current, max, or p95

CanaryConfig

Field	Type	Default	Description
count	int	—	Number of canary allocations to start before full promotion
evaluateAfter	string	—	Duration to wait before evaluating canary health, such as 2m

When a process declares canary settings, Norn submits the Nomad deployment with canary allocations, waits through the normal health gate, then evaluates allocation health after evaluateAfter. Operators can inspect and promote with norn canary <app> and norn promote <app>.

FunctionSpec

Field	Type	Default	Description
timeout	string	—	Maximum execution time (Go duration)
memory	int	—	Memory override in MB (takes precedence over resources.memory)

Repo

Field	Type	Default	Description
url	string	—	Git clone URL
branch	string	main	Default branch
autoDeploy	bool	false	Auto-deploy on webhook push
repoWeb	string	—	Web URL for the repo (used in UI links)

Build

Field	Type	Default	Description
dockerfile	string	Dockerfile	Path to Dockerfile
test	string	—	Test command (runs before deploy, fails pipeline on error)

Infrastructure

Field	Type	Description
postgres.database	string	Database name for snapshots, migrations, and DATABASE_URL
redis.namespace	string	Redis key namespace
kafka.topics	string[]	Kafka topics to declare
nats.streams	string[]	NATS JetStream stream names
objectStorage.provider	string	S3-compatible provider hint; defaults to garage
objectStorage.buckets	ObjectStorageBucket[]	Buckets to provision and expose to the app

ObjectStorageBucket

Field	Type	Default	Description
name	string	—	DNS-compatible bucket name
access	string	readWrite	readOnly, readWrite, or owner
public	bool	false	Reserved for future public exposure policy
prefix	string	—	Optional object key prefix exposed as S3_PREFIX...
env	string	derived from bucket name	Env alias for S3_BUCKET_<ENV>

Endpoints

Field	Type	Description
url	string	External hostname (maps to cloudflared ingress rule)
region	string	Optional region hint

Volumes

Field	Type	Default	Description
name	string	—	Nomad host volume name
mount	string	—	Mount path inside the container
readOnly	bool	false	Mount as read-only

SnapshotPolicy

Field	Type	Default	Description
keep	int	3	Newest local snapshots to keep when retention runs without --keep
preRestore	bool	false	Create a safety snapshot before restore when the API or CLI does not override the restore request
retentionEnabled	bool	false	Reserved flag for scheduled retention automation
exportBucket	string	—	S3-compatible bucket for norn snapshots export/remote/import

DeployPolicy

Field	Type	Default	Description
autoRollback	bool	true	Queue rollback to the last successful deployment when the deploy health gate fails

Because autoRollback defaults to enabled, omit deployPolicy for normal apps. Set autoRollback: false when a failed health gate should stop for manual operator review.

Defaults Summary

Setting	Default Value
resources.cpu	100 MHz
resources.memory	128 MB
health.interval	10s
health.timeout	5s
scaling.min	1
repo.branch	main
snapshots.keep	3
deployPolicy.autoRollback	true

Full Example

A real-world infraspec for an app with a web process, background worker, cron job, and database:

name: signal-sideband

repo:
  url: git@github.com:antiartificial/signal-sideband.git
  branch: master
  autoDeploy: true
  repoWeb: https://github.com/antiartificial/signal-sideband

build:
  dockerfile: Dockerfile
  test: go test ./...

processes:
  web:
    port: 8080
    command: ./signal-sideband
    health:
      path: /health
    metrics:
      enabled: true
      path: /metrics
    scaling:
      min: 1
    resources:
      cpu: 200
      memory: 256
    canary:
      count: 1
      evaluateAfter: 2m
  poller:
    command: ./signal-sideband --mode=poller
    resources:
      cpu: 100
      memory: 128
  digest:
    schedule: "0 8 * * *"
    command: ./signal-sideband --mode=digest

secrets:
  - DATABASE_URL
  - OPENAI_API_KEY
  - FILTER_GROUP_ID

migrations: ./migrations

env:
  LOG_LEVEL: info
  TZ: America/New_York

infrastructure:
  postgres:
    database: signal_sideband
  objectStorage:
    provider: garage
    buckets:
      - name: signal-sideband-attachments
        access: readWrite
        env: ATTACHMENTS

snapshots:
  keep: 5
  exportBucket: signal-sideband-snapshots

deployPolicy:
  autoRollback: true

endpoints:
  - url: signal.example.com

volumes:
  - name: signal-data
    mount: /var/lib/signal-cli