Jon Chery
134f85d2df
---ci--- project: acdl phase: 34 milestone: v1.8 status: execute ---/ci--- - DynamoDB acdl-change-requests table added to terraform/platform/main.tf (PK changeRequestId, SK submittedAt, SSE via CMK, PITR). - validate_change_request Lambda action added to contract_ingestor.py: queries CMDB, asserts status=approved + consumerRepo match. - decommission_transform() added to contract_resolver.py: zeroes all counts (desired_count, min/max_capacity) + sets deletion_protection=false. - Decommission mode added to deploy pipeline + both deploy workflows (mode: decommission + changeRequestId input). Byte-identical. - run_platform.sh --decommission flag: validates CR, resolves with deletion_protection=false (step 1), then decommission_transform (step 2). HITL SRE gates documented. - docs/consumer-guide.md: new "Decommissioning a stack" section with CR request, trigger, 2-step HITL SRE gates, CMK deletion window, uptime. Tests: +14 (318 -> 332). All pass.
358 lines
13 KiB
Python
358 lines
13 KiB
Python
"""ACDL Contract Resolver — resolve a consumer contract to a Target Stack instance.
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The contract resolver is the bridge between the consumer's declared intent
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(a contract YAML) and the platform's executable representation (a Target
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Stack JSON instance). It:
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1. Loads and validates the contract against schemas/contract.schema.json.
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2. Looks up the module name in modules/registry.json.
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3. If the module is an L1 primitive: builds a stack instance directly from
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the interface.json + contract inputs.
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4. If the module is an L2 composition: loads the composition.json, expands
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children to stack resources, resolves wires to ref: expressions, and
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emits the full stack instance.
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The output is a JSON instance valid against schemas/stack.schema.json,
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ready for the Terraform adapter to compile.
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CLI: contract_resolver.py <contract.yaml> <out.json>
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"""
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import json
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import os
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import sys
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import yaml
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import jsonschema
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def _load_json(path):
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with open(path, "r") as fh:
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return json.load(fh)
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def _load_yaml(path):
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with open(path, "r") as fh:
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return yaml.safe_load(fh)
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def _resolve_wire_value(wire, contract_inputs, child_outputs):
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"""Resolve a wire 'from' reference to a concrete value.
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Wire 'from' can be:
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- "contract.inputs.<name>" — a contract input value
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- "<childId>.outputs.<name>" — a reference to another child's output
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Returns either a concrete value (string/number/boolean) or a
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"ref:<resourceId>.<outputName>" string for cross-child references.
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For multi-resource L1s (e.g. vpc which expands to vpc-vpc, vpc-subnet,
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vpc-routetable), the ref must point to the sub-resource that actually
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produces the output, not the child id. The child_outputs table maps
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childId -> {outputName -> resourceId} so the ref uses the correct
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resource id.
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"""
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from_expr = wire["from"]
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to_expr = wire["to"]
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# If the 'from' is a contract input, use the concrete value
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if from_expr.startswith("contract.inputs."):
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input_name = from_expr[len("contract.inputs."):]
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if input_name in contract_inputs:
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return contract_inputs[input_name]
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# Check for default
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default = wire.get("default")
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if default is not None:
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return default
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return None
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# If the 'from' is a child output, emit a ref: expression
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if "." in from_expr:
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parts = from_expr.split(".", 2)
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if len(parts) >= 3 and parts[1] == "outputs":
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child_id = parts[0]
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output_name = parts[2]
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# Look up the sub-resource that produces this output.
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# child_outputs[child_id] is a dict {outputName -> resourceId}.
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# If the child is a single-resource L1, the resourceId == child_id.
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# If multi-resource, the resourceId is the expanded sub-resource id.
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child_out_map = child_outputs.get(child_id, {})
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resource_id = child_out_map.get(output_name, child_id)
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return f"ref:{resource_id}.{output_name}"
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return None
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def resolve_l1(contract, registry, repo_root):
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"""Resolve a contract referencing an L1 primitive to a stack instance."""
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module_name = contract["module"]
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module_ref = f"{module_name}@1.0.0"
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inputs = contract.get("inputs", {})
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environment = contract.get("environment", "dev")
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# Load the interface
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entry = registry[module_name]["1.0.0"]
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iface_path = os.path.join(repo_root, entry["interface"])
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iface = _load_json(iface_path)
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# Build the stack instance
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stack_instance = {
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"version": "1.0.0",
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"stack": {
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"name": module_name,
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"kind": "l1",
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"depth": 1,
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},
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"resources": [
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{
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"id": iface.get("type", module_name).split(":")[-1]
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if ":" in iface.get("type", "") else module_name,
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"type": iface["type"],
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"module": module_ref,
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"inputs": dict(inputs),
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"outputs": {
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out_name: {"type": out_spec.get("type", "string")}
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for out_name, out_spec in iface.get("outputs", {}).items()
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},
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}
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],
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}
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# Add NFRs if present in the interface
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nfrs = iface.get("nfrs", {})
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if nfrs:
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stack_instance["resources"][0]["nfrs"] = nfrs
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return stack_instance
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def resolve_l2(contract, registry, repo_root):
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"""Resolve a contract referencing an L2 composition to a stack instance."""
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module_name = contract["module"]
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inputs = contract.get("inputs", {})
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# Load the composition
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entry = registry[module_name]["1.0.0"]
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comp_path = os.path.join(repo_root, entry["interface"])
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composition = _load_json(comp_path)
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# Track child outputs for wire resolution
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# child_outputs[childId] = {outputName: resourceId}
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# For single-resource L1s, resourceId == childId
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# For multi-resource L1s, resourceId is the expanded sub-resource id
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child_outputs = {}
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resources = []
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# Expand children to resources
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for child in composition["children"]:
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child_id = child["id"]
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child_module = child["module"]
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child_name = child_module.split("@")[0]
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# Load the child's interface to get type and outputs
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child_entry = registry[child_name]["1.0.0"]
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child_iface_path = os.path.join(repo_root, child_entry["interface"])
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child_iface = _load_json(child_iface_path)
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# Build the output->resourceId map for this child
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child_out_map = {}
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# For multi-resource L1s (like vpc), the first resource type is the
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# primary; the adapter handles expansion. Use the interface's type
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# or the first resource in the interface's resources array.
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if "resources" in child_iface and child_iface["resources"]:
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# Multi-resource L1: create one resource per sub-resource
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for sub_res in child_iface["resources"]:
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res_id = f"{child_id}-{sub_res['type'].split(':')[-1].replace('_', '-')}" if len(child_iface["resources"]) > 1 else child_id
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resource = {
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"id": res_id,
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"type": sub_res["type"],
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"module": child_module,
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"inputs": {},
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"outputs": {
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out: {"type": "string"}
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for out in sub_res.get("outputs", [])
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},
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}
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resources.append(resource)
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# Map each output to this sub-resource's id
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for out_name in sub_res.get("outputs", []):
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child_out_map[out_name] = res_id
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else:
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# Single-resource L1
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resource = {
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"id": child_id,
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"type": child_iface["type"],
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"module": child_module,
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"inputs": {},
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"outputs": {
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out_name: {"type": out_spec.get("type", "string")}
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for out_name, out_spec in child_iface.get("outputs", {}).items()
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},
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}
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resources.append(resource)
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# Map each output to the child id
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for out_name in child_iface.get("outputs", {}):
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child_out_map[out_name] = child_id
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# Also map interface-level outputs (for L1s that declare outputs at the
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# interface level rather than per-resource)
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for out_name in child_iface.get("outputs", {}):
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if out_name not in child_out_map:
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child_out_map[out_name] = child_id
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child_outputs[child_id] = child_out_map
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# Resolve wires to populate inputs
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for wire in composition.get("wires", []):
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to_expr = wire["to"]
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# Parse "to": "<childId>.inputs.<inputName>"
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to_parts = to_expr.split(".")
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if len(to_parts) != 3 or to_parts[1] != "inputs":
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continue
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target_child = to_parts[0]
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input_name = to_parts[2]
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value = _resolve_wire_value(wire, inputs, child_outputs)
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if value is not None:
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# Find the target resource and set the input
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for res in resources:
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if res["id"] == target_child or res["id"].startswith(f"{target_child}-"):
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res["inputs"][input_name] = value
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break
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# Build the stack instance
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stack_instance = {
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"version": "1.0.0",
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"stack": {
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"name": module_name,
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"kind": "l2",
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"depth": composition.get("depth", 1),
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},
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"resources": resources,
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}
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# REQ-87: Propagate deletion_protection feature flag from contract inputs
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# to all children's NFRs. When inputs.deletion_protection is false,
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# all resources get deletion_protection=false (used by decommission).
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deletion_protection_input = inputs.get("deletion_protection", True)
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if deletion_protection_input is not True:
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for res in resources:
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if "nfrs" not in res:
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res["nfrs"] = {}
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res["nfrs"]["deletion_protection"] = deletion_protection_input
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# Also record the feature flag on the stack object for introspection.
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if "deletion_protection" in inputs:
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stack_instance["stack"]["features"] = {
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"deletion_protection": deletion_protection_input
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}
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# P1-7: Process the composition's outputs[] array to build stack.outputs.
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# Each output wire: {"from": "<childId>.outputs.<name>", "to": "stack.outputs.<outName>"}
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# The child_outputs map (childId -> {outputName: resourceId}) resolves
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# the source to a resource id, which the adapter uses to emit
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# `output "<outName>" { value = aws_<type>.<resourceId>.<attr> }`.
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stack_outputs = {}
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for out_wire in composition.get("outputs", []):
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from_expr = out_wire.get("from", "")
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to_expr = out_wire.get("to", "")
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# Parse "to": "stack.outputs.<outName>"
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to_parts = to_expr.split(".")
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if len(to_parts) != 3 or to_parts[1] != "outputs":
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continue
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out_name = to_parts[2]
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# Parse "from": "<childId>.outputs.<name>"
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from_parts = from_expr.split(".")
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if len(from_parts) != 3 or from_parts[1] != "outputs":
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continue
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src_child = from_parts[0]
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src_output = from_parts[2]
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# Resolve the source resource id from child_outputs
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child_out_map = child_outputs.get(src_child, {})
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src_resource_id = child_out_map.get(src_output, src_child)
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stack_outputs[out_name] = {
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"type": "string",
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"from": src_resource_id,
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"output": src_output,
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}
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if stack_outputs:
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stack_instance["outputs"] = stack_outputs
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return stack_instance
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def decommission_transform(stack_instance):
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"""REQ-92: Transform a resolved stack instance for decommission.
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Sets all scalable counts to 0 and deletion_protection to false on
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every resource. Used by the decommission pipeline mode after the
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first step (disable deletion protection) has been applied.
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"""
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for res in stack_instance.get("resources", []):
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if "nfrs" not in res:
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res["nfrs"] = {}
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res["nfrs"]["deletion_protection"] = False
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inputs = res.get("inputs", {})
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if "desired_count" in inputs:
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inputs["desired_count"] = 0
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if "min_capacity" in inputs:
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inputs["min_capacity"] = 0
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if "max_capacity" in inputs:
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inputs["max_capacity"] = 0
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return stack_instance
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def resolve(contract_path, repo_root=None):
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"""Resolve a consumer contract to a Target Stack instance.
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Args:
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contract_path: Path to the contract YAML file.
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repo_root: Root of the ACDL repo (defaults to two levels up from this file).
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Returns:
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A dict representing the Target Stack instance.
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"""
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if repo_root is None:
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repo_root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
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# Load contract
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contract = _load_yaml(contract_path)
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# Load schemas
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contract_schema = _load_json(os.path.join(repo_root, "schemas", "contract.schema.json"))
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# Validate contract against schema
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jsonschema.validate(contract, contract_schema)
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# Load registry
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registry = _load_json(os.path.join(repo_root, "modules", "registry.json"))
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module_name = contract["module"]
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if module_name not in registry:
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raise ValueError(f"module '{module_name}' not found in registry")
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# Determine if L1 or L2
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entry = registry[module_name]["1.0.0"]
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interface_path = entry["interface"]
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is_l2 = "l2" in interface_path or "composition" in interface_path
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if is_l2:
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stack_instance = resolve_l2(contract, registry, repo_root)
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else:
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stack_instance = resolve_l1(contract, registry, repo_root)
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# Validate against stack schema
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stack_schema = _load_json(os.path.join(repo_root, "schemas", "stack.schema.json"))
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jsonschema.validate(stack_instance, stack_schema)
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return stack_instance
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if __name__ == "__main__":
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if len(sys.argv) != 3:
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print("usage: contract_resolver.py <contract.yaml> <out.json>", file=sys.stderr)
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sys.exit(2)
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result = resolve(sys.argv[1])
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with open(sys.argv[2], "w") as fh:
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json.dump(result, fh, indent=2)
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print(f"resolver: resolved {sys.argv[1]} -> {sys.argv[2]}", file=sys.stderr) |