so-l2l: refactor down() for clarity
down() is now a five-phase recipe with each phase a single line: namespaced cleanup, cluster-scoped PV cleanup, synchronous wait, optional namespace delete, optional cluster destroy. Each helper does one thing. - Extract _stack_label_selector() and _namespace_exists() so down() reads declaratively. - Rename _delete_labeled_resources -> _delete_namespaced_labeled_ resources to match what it actually does (namespaced phase only). - Extract _list_delete_namespaced() helper for the Services and Endpoints list+delete pattern (k8s client lacks delete_collection for those kinds). - _wait_for_labeled_gone (renamed from _wait_for_labeled_deletions) builds listers in clean append-style; DRY the poll/timeout iterations via a local remaining() closure. No behavior changes — same semantics, ~50 fewer lines. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>pull/743/head
Prathamesh Musale
parent
2f99e6f7c9
commit
774b39836e
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@ -912,181 +912,170 @@ class K8sDeployer(Deployer):
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call_stack_deploy_start(self.deployment_context)
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def down(self, timeout, volumes, skip_cluster_management, delete_namespace=False):
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def down(
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self, timeout, volumes, skip_cluster_management, delete_namespace=False
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):
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"""Tear down stack-labeled resources. Phases:
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1. Delete namespaced resources (if namespace still exists).
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2. Delete cluster-scoped PVs (if --delete-volumes, regardless of (1)).
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3. Wait for everything we triggered to actually be gone.
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4. Optionally delete the namespace itself (--delete-namespace).
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5. Optionally destroy the kind cluster (--perform-cluster-management).
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Steps 1-3 scope cleanup to a single stack via app.kubernetes.io/stack,
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so multiple stacks sharing a namespace tear down independently.
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"""
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self.skip_cluster_management = skip_cluster_management
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self.connect_api()
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# Delete by stack label so multiple stacks sharing a namespace are
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# cleaned up independently. Fall back to the app label for stacks
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# that predate the stack label.
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stack_name = self.cluster_info.stack_name
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if stack_name:
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label_selector = f"app.kubernetes.io/stack={stack_name}"
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else:
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label_selector = f"app={self.cluster_info.app_name}"
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selector = self._stack_label_selector()
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ns = self.k8s_namespace
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# Check whether the namespace exists. If it's already gone, skip the
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# namespaced cleanup (nothing to do, list/delete calls would 404),
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# but cluster-scoped PVs may still be labeled with this stack — so
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# fall through to the cluster-scoped half of _delete_labeled_resources.
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try:
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self.core_api.read_namespace(name=ns)
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namespace_present = True
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except ApiException as e:
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if e.status == 404:
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namespace_present = False
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if opts.o.debug:
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print(f"Namespace {ns} not found; cleaning cluster-scoped only")
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else:
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raise
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ns_exists = self._namespace_exists(ns)
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self._delete_labeled_resources(
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ns,
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label_selector,
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delete_volumes=volumes,
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namespace_present=namespace_present,
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if ns_exists:
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self._delete_namespaced_labeled_resources(ns, selector, volumes)
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if volumes:
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self._delete_labeled_pvs(selector)
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self._wait_for_labeled_gone(
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ns, selector, delete_volumes=volumes, namespace_present=ns_exists
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)
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# Full teardown: nuke the namespace and wait for termination so that a
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# subsequent up() can recreate it cleanly. No-op if already missing.
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if delete_namespace and namespace_present:
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if delete_namespace and ns_exists:
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self._delete_namespace()
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self._wait_for_namespace_gone()
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if self.is_kind() and not self.skip_cluster_management:
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destroy_cluster(self.kind_cluster_name)
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def _delete_labeled_resources(
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self,
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namespace: str,
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label_selector: str,
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delete_volumes: bool,
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namespace_present: bool = True,
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def _stack_label_selector(self) -> str:
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"""Selector used for stack-scoped cleanup.
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Prefer app.kubernetes.io/stack (per-stack) and fall back to the
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legacy app= label (cluster-id scoped) for deployments that predate
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the stack label.
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"""
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stack_name = self.cluster_info.stack_name
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if stack_name:
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return f"app.kubernetes.io/stack={stack_name}"
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return f"app={self.cluster_info.app_name}"
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def _namespace_exists(self, namespace: str) -> bool:
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try:
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self.core_api.read_namespace(name=namespace)
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return True
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except ApiException as e:
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if e.status == 404:
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if opts.o.debug:
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print(f"Namespace {namespace} not found")
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return False
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raise
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def _delete_namespaced_labeled_resources(
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self, namespace: str, selector: str, delete_volumes: bool
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):
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"""Delete all stack-labeled resources.
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Namespaced resources (Deployments, Services, ConfigMaps, Secrets,
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PVCs, Pods, Endpoints, Ingresses, Jobs) are only touched when the
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namespace still exists. Cluster-scoped PVs are always candidates
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for deletion if delete_volumes is set — they can outlive a deleted
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namespace (e.g. after an earlier stop --delete-namespace).
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Keeps the namespace Active so that a subsequent up() can recreate
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resources without racing against k8s namespace termination.
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"""Delete Ingresses, Deployments, Jobs, Services, ConfigMaps,
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Secrets, Endpoints, Pods, and (if delete_volumes) PVCs in the
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namespace. Order matters: Ingresses first so external traffic
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stops, then workloads, then support objects, then Pods, then PVCs.
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"""
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if opts.o.dry_run:
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print(
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f"Dry run: would delete resources in {namespace} "
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f"matching {label_selector}"
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f"Dry run: would delete namespaced resources in {namespace} "
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f"matching {selector}"
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)
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return
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def _swallow_404(fn):
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def swallow_404(fn):
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try:
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fn()
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except ApiException as e:
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if e.status not in (404, 405):
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raise
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if not namespace_present:
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# Jump straight to cluster-scoped cleanup.
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if delete_volumes:
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self._delete_labeled_pvs(label_selector)
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self._wait_for_labeled_deletions(
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namespace, label_selector, delete_volumes=delete_volumes
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)
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return
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# Ingresses first so external traffic stops before pods disappear.
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_swallow_404(
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swallow_404(
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lambda: self.networking_api.delete_collection_namespaced_ingress(
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namespace=namespace, label_selector=label_selector
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namespace=namespace, label_selector=selector
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)
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)
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# Deployments (owns ReplicaSets + Pods via garbage collection).
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_swallow_404(
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# Deployments (owns ReplicaSets + Pods via GC).
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swallow_404(
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lambda: self.apps_api.delete_collection_namespaced_deployment(
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namespace=namespace, label_selector=label_selector
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namespace=namespace, label_selector=selector
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)
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)
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# Jobs (propagation_policy=Background deletes child pods).
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_swallow_404(
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# Jobs — propagation=Background cascades to child pods.
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swallow_404(
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lambda: self.batch_api.delete_collection_namespaced_job(
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namespace=namespace,
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label_selector=label_selector,
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label_selector=selector,
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propagation_policy="Background",
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)
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)
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# Services — no delete_collection on core_api for services;
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# list + delete individually.
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try:
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svcs = self.core_api.list_namespaced_service(
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namespace=namespace, label_selector=label_selector
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)
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for svc in svcs.items:
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_swallow_404(
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lambda n=svc.metadata.name: self.core_api.delete_namespaced_service(
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name=n, namespace=namespace
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)
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)
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except ApiException as e:
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if e.status != 404:
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raise
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# ConfigMaps, Secrets, Endpoints.
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_swallow_404(
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lambda: self.core_api.delete_collection_namespaced_config_map(
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namespace=namespace, label_selector=label_selector
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)
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)
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_swallow_404(
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lambda: self.core_api.delete_collection_namespaced_secret(
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namespace=namespace, label_selector=label_selector
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)
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)
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# Endpoints usually GC with Services, but delete explicitly for
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# external-services Endpoints we create directly.
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try:
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eps = self.core_api.list_namespaced_endpoints(
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namespace=namespace, label_selector=label_selector
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)
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for ep in eps.items:
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_swallow_404(
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lambda n=ep.metadata.name: self.core_api.delete_namespaced_endpoints(
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name=n, namespace=namespace
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)
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)
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except ApiException as e:
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if e.status != 404:
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raise
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# Lingering Pods (shouldn't exist after Deployment/Job deletion,
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# but handles standalone pods if any were created).
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_swallow_404(
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lambda: self.core_api.delete_collection_namespaced_pod(
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namespace=namespace, label_selector=label_selector
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)
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)
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if delete_volumes:
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# Namespaced PVCs.
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_swallow_404(
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lambda: self.core_api.delete_collection_namespaced_persistent_volume_claim(
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namespace=namespace, label_selector=label_selector
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)
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)
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self._delete_labeled_pvs(label_selector)
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self._wait_for_labeled_deletions(
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# Services have no delete_collection on core_api; list + delete.
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self._list_delete_namespaced(
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namespace,
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label_selector,
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delete_volumes=delete_volumes,
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namespace_present=True,
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selector,
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list_fn=self.core_api.list_namespaced_service,
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delete_fn=self.core_api.delete_namespaced_service,
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)
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# ConfigMaps, Secrets.
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swallow_404(
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lambda: self.core_api.delete_collection_namespaced_config_map(
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namespace=namespace, label_selector=selector
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)
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)
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swallow_404(
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lambda: self.core_api.delete_collection_namespaced_secret(
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namespace=namespace, label_selector=selector
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)
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)
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# Endpoints usually GC with Services, but we create a few directly
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# (external-services) that aren't owned by a Service — clean those.
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self._list_delete_namespaced(
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namespace,
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selector,
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list_fn=self.core_api.list_namespaced_endpoints,
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delete_fn=self.core_api.delete_namespaced_endpoints,
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)
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# Stray pods (owned pods are GC'd with their Deployment/Job).
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swallow_404(
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lambda: self.core_api.delete_collection_namespaced_pod(
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namespace=namespace, label_selector=selector
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)
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)
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if delete_volumes:
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swallow_404(
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lambda: self.core_api.delete_collection_namespaced_persistent_volume_claim( # noqa: E501
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namespace=namespace, label_selector=selector
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)
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)
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def _delete_labeled_pvs(self, label_selector: str):
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"""Delete cluster-scoped PVs matching the stack label."""
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def _list_delete_namespaced(self, namespace, selector, list_fn, delete_fn):
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"""List by selector and delete each item. Use for resources where
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the k8s python client lacks delete_collection (Services, Endpoints).
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"""
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try:
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pvs = self.core_api.list_persistent_volume(label_selector=label_selector)
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items = list_fn(namespace=namespace, label_selector=selector).items
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except ApiException as e:
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if e.status == 404:
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return
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raise
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for item in items:
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try:
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delete_fn(name=item.metadata.name, namespace=namespace)
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except ApiException as e:
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if e.status not in (404, 405):
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raise
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def _delete_labeled_pvs(self, selector: str):
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"""Delete cluster-scoped PVs matching the stack label."""
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if opts.o.dry_run:
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print(f"Dry run: would delete PVs matching {selector}")
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return
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try:
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pvs = self.core_api.list_persistent_volume(label_selector=selector)
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except ApiException as e:
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if opts.o.debug:
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print(f"Error listing PVs: {e}")
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@ -1099,95 +1088,58 @@ class K8sDeployer(Deployer):
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except ApiException as e:
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_check_delete_exception(e)
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def _wait_for_labeled_deletions(
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def _wait_for_labeled_gone(
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self,
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namespace: str,
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label_selector: str,
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selector: str,
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delete_volumes: bool,
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namespace_present: bool = True,
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namespace_present: bool,
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timeout_seconds: int = 120,
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):
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"""Block until stack-labeled resources finish terminating.
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"""Poll until every kind we triggered a delete for is gone.
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delete_collection returns before the apiserver has actually removed
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the objects — finalizers (PVs waiting for PVCs, PVCs waiting for
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VolumeAttachment, pods waiting for graceful shutdown) propagate
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async. Poll until everything we triggered a delete for is gone,
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so callers can assume a synchronous tear-down.
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delete_collection/delete are async — finalizers (PV bound-by-PVC,
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PVC bound-by-VolumeAttachment, pod graceful shutdown) propagate
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after the API call returns. Blocking here makes down() a
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synchronous contract for callers (tests, ansible, cryovial).
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"""
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import time
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# (kind name, lister callable) — lister returns an object with .items.
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# Namespaced kinds are skipped when the namespace is already gone
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# (there's nothing to list).
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listers = [] if not namespace_present else [
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(
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"deployment",
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lambda: self.apps_api.list_namespaced_deployment(
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namespace=namespace, label_selector=label_selector
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),
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),
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(
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"ingress",
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lambda: self.networking_api.list_namespaced_ingress(
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namespace=namespace, label_selector=label_selector
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),
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),
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(
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"job",
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lambda: self.batch_api.list_namespaced_job(
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namespace=namespace, label_selector=label_selector
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),
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),
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(
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"service",
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lambda: self.core_api.list_namespaced_service(
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namespace=namespace, label_selector=label_selector
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),
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),
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(
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"configmap",
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lambda: self.core_api.list_namespaced_config_map(
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namespace=namespace, label_selector=label_selector
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),
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),
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(
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"secret",
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lambda: self.core_api.list_namespaced_secret(
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namespace=namespace, label_selector=label_selector
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),
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),
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(
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"pod",
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lambda: self.core_api.list_namespaced_pod(
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namespace=namespace, label_selector=label_selector
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),
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),
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]
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if delete_volumes:
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if namespace_present:
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listers = []
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if namespace_present:
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listers += [
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("deployment", lambda: self.apps_api.list_namespaced_deployment(
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namespace=namespace, label_selector=selector)),
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("ingress", lambda: self.networking_api.list_namespaced_ingress(
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namespace=namespace, label_selector=selector)),
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("job", lambda: self.batch_api.list_namespaced_job(
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namespace=namespace, label_selector=selector)),
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("service", lambda: self.core_api.list_namespaced_service(
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namespace=namespace, label_selector=selector)),
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("configmap", lambda: self.core_api.list_namespaced_config_map(
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namespace=namespace, label_selector=selector)),
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("secret", lambda: self.core_api.list_namespaced_secret(
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namespace=namespace, label_selector=selector)),
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("pod", lambda: self.core_api.list_namespaced_pod(
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namespace=namespace, label_selector=selector)),
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]
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if delete_volumes:
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listers.append(
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(
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"persistentvolumeclaim",
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lambda: self.core_api.list_namespaced_persistent_volume_claim(
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namespace=namespace, label_selector=label_selector
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),
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)
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("persistentvolumeclaim",
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lambda: self.core_api.list_namespaced_persistent_volume_claim(
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namespace=namespace, label_selector=selector))
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)
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# PVs are cluster-scoped — wait for them even when the namespace
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# is already gone (orphaned from a prior --delete-namespace).
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# PVs are cluster-scoped — wait for them even when the namespace
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# is already gone (orphaned from a prior --delete-namespace).
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if delete_volumes:
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listers.append(
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(
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"persistentvolume",
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lambda: self.core_api.list_persistent_volume(
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label_selector=label_selector
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),
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)
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("persistentvolume",
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lambda: self.core_api.list_persistent_volume(
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label_selector=selector))
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)
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deadline = time.monotonic() + timeout_seconds
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while time.monotonic() < deadline:
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remaining = []
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def remaining():
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out = []
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for kind, lister in listers:
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try:
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items = lister().items
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|
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@ -1196,27 +1148,23 @@ class K8sDeployer(Deployer):
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continue
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raise
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if items:
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remaining.append((kind, len(items)))
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if not remaining:
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out.append((kind, len(items)))
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return out
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deadline = time.monotonic() + timeout_seconds
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while time.monotonic() < deadline:
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left = remaining()
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if not left:
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return
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if opts.o.debug:
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print(f"Waiting for deletions: {remaining}")
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print(f"Waiting for deletions: {left}")
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time.sleep(2)
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# Timed out — warn but don't raise. Caller may still have the
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# cluster in a sensible state.
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still_present = []
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for kind, lister in listers:
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try:
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items = lister().items
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||||
except ApiException:
|
||||
continue
|
||||
if items:
|
||||
still_present.append((kind, len(items)))
|
||||
if still_present:
|
||||
left = remaining()
|
||||
if left:
|
||||
print(
|
||||
f"Warning: resources still present after {timeout_seconds}s: "
|
||||
f"{still_present}"
|
||||
f"{left}"
|
||||
)
|
||||
|
||||
def status(self):
|
||||
|
|
|
|||
Loading…
Reference in New Issue