cozystack/hack/e2e-chainsaw/README.md

Chainsaw E2E tests

The Cozystack E2E app suite, written for Kyverno Chainsaw — a declarative, Kubernetes-native E2E test framework (CNCF, part of the Kyverno project; successor to KUTTL).

This directory replaces the per-app BATS suite that used to live in hack/e2e-apps/*.bats. The CI e2e job runs chainsaw test hack/e2e-chainsaw/ after make install-cozystack; cluster bootstrap (hack/e2e-prepare-cluster.bats, hack/e2e-install-cozystack.bats) and the OpenAPI checks (hack/e2e-test-openapi.bats) remain BATS.

Layout

hack/e2e-chainsaw/
├── .chainsaw.yaml          # global Configuration (namespace, timeouts, JUnit report)
├── _lib/                   # shell reused by the script-heavy suites
│   ├── run-kubernetes.sh   #   tenant Kubernetes bringup + LB/NFS/ouroboros checks
│   └── remediation-guard.sh
├── <app>/
│   ├── chainsaw-test.yaml  # one or more Test definitions
│   └── <app>.yaml          # the manifests the test applies
└── ...

Suites: postgres, bucket, mariadb, mongodb, redis, qdrant, clickhouse, kafka, etcd, openbao, harbor, foundationdb, external-dns, kuberture, vminstance, gateway, kubernetes-latest, kubernetes-previous, kubernetes-oidc-system, kubernetes-oidc-customconfig, securitygroup.

What Chainsaw buys over the BATS suite

• Readable tests — a list of resources and expected states, not shell control flow. The timeout N sh -ec "until kubectl get ..." + kubectl wait pair that appeared ~100 times collapses into a single assert that polls existence and state together.
• Distinguishable failure modes — "object never created", "created but never ready", and "wrong status" all surface as a structured diff instead of an opaque shell timeout.
• Automatic diagnostics — catch blocks dump events, describe, and pod logs on any failure (the BATS suite only did this in harbor.bats, by hand).
• Automatic cleanup — resources Chainsaw applied are deleted (and waited on) in reverse order; finally covers operator-created leftovers.
• CI-ready output — a JUnit chainsaw-report.xml is emitted for the test summary.

Test anatomy

Each suite is a directory with a chainsaw-test.yaml (one or more Test docs) plus the manifests it applies. A step has try (operations: apply, assert, error, script, delete, …), optional catch (diagnostics on failure), and optional finally (teardown regardless of outcome).

Declarative suites assert on status.conditions and concrete fields. Inherently imperative suites keep their logic in script steps:

• openbao — bao operator init/unseal via kubectl exec.
• kuberture — jq on Service annotations + external-dns split-horizon log assertions.
• gateway — admission-rejection cases that need kubectl --as impersonation or error-message greps; the tenant apex is read from the namespace namespace.cozystack.io/host label at runtime so they pass on any host.
• kubernetes-latest/previous — wrap _lib/run-kubernetes.sh (Kamaji bringup, port-forward, LB/NFS/ouroboros). The script cds to the repo root (the test dir is hack/e2e-chainsaw/<suite>, so repo root is ../../..).

Conventions / gotchas (Chainsaw v0.2.15)

• Condition asserts use the filter-as-list form, not the documented [0] index:

  status:
    (conditions[?type == 'Ready']):
    - status: "True"
  

  The (conditions[?type == 'Ready'])[0]: {status: "True"} idiom fails with "field not found in the input object".
• A reading of a failure diff: the "actual" side is a projection onto the expected fields — status: {} means the JMESPath expression failed, not that status is empty. Read the error line above the diff first.
• error with a bare resource ref (name only) asserts the resource does not exist (used for "PVC reclaimed", "no backup schedule", "child has no Gateway HR").
• script runs in the test directory with $NAMESPACE set to the config namespace (tenant-test).

Running locally

Requires a cluster with Cozystack installed and a tenant-test namespace (the environment hack/e2e-install-cozystack.bats produces). bucket additionally needs mc and nc on the host; kuberture/openbao/harbor need jq.

# install chainsaw
go install github.com/kyverno/chainsaw@latest   # or: brew install kyverno/chainsaw/chainsaw

# run all suites (config picked up from .chainsaw.yaml)
cd hack/e2e-chainsaw
chainsaw test

# run a single suite
chainsaw test postgres/

kubernetes-latest/kubernetes-previous each bring up a full tenant Kubernetes cluster (~25 min, real worker nodes) and vminstance boots a nested VM — expect a long run for the full set.

CI integration

The e2e job in .github/workflows/pull-requests.yaml runs make -C packages/core/testing test-chainsaw (which execs chainsaw test hack/e2e-chainsaw/ inside the e2e sandbox) and uploads chainsaw-report.xml. The sandbox image (packages/core/testing/images/e2e-sandbox/Dockerfile) ships the chainsaw binary alongside kubectl/helm/mc/jq/nc.