Aleksei Sviridkin
c038cf25d3
A volume server started with -max 0 derives the slots it has left from the free space on its disk, less the room its unfilled volumes still claim, divided by the master's volume size limit, and each collection claims a batch of those slots on every volume server the replication spans. The number of buckets an instance can hold therefore has a ceiling well below what the free bytes suggest, and crossing it leaves every COSI object reporting ready while the S3 PUT times out. The existing case creates one bucket, which sits inside that ceiling at any sizing, so nothing here told a working ceiling from an exhausted one. This case creates three beside the platform's own backup bucket and requires each to accept an object, which is the only signal the exhaustion produces. Three rather than two because the count has to clear the ceiling whether or not cozy-backups and the unnamed default collection have grown yet, which this suite cannot observe. BucketAccess reconciles separately from the claim it belongs to, and the write step reads the Secret that access produces, so readiness of the release and the claim is not enough to enter it. Without the access assertions the step can fail on a missing Secret, which looks the same in the report as the capacity failure it is here to measure. The catch reads the master's slot accounting as well as its log. A grow failure in the log does not say whether the shipped limit is too coarse for the PVC or an earlier collection in the same run still holds the budget, and the per-server Max against Volumes does. The read runs inside the master, whose image ships curl, so it needs nothing on the host and adds no second fixed port to the reason this suite cannot run in parallel. That reason now covers two cases rather than one, which the shared config says. Assisted-by: LLM Signed-off-by: Aleksei Sviridkin <f@lex.la>
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, valkey, qdrant, clickhouse, kafka, rabbitmq, etcd, openbao, harbor, foundationdb, external-dns, kuberture, vminstance, gateway, opensearch, kubernetes-latest, kubernetes-previous, 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 waitpair that appeared ~100 times collapses into a singleassertthat 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 —
catchblocks dump events,describe, and pod logs on any failure (the BATS suite only did this inharbor.bats, by hand). - Automatic cleanup — resources Chainsaw applied are deleted (and waited on) in reverse order;
finallycovers operator-created leftovers. - CI-ready output — a JUnit
chainsaw-report.xmlis 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/unsealviakubectl exec. - kuberture —
jqon Service annotations + external-dns split-horizon log assertions. - gateway — admission-rejection cases that need
kubectl --asimpersonation or error-message greps; the tenant apex is read from the namespacenamespace.cozystack.io/hostlabel at runtime so they pass on any host. - kubernetes-latest/previous — wrap
_lib/run-kubernetes.sh(Kamaji bringup, port-forward, LB/NFS/ouroboros). The scriptcds to the repo root (the test dir ishack/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:Thestatus: (conditions[?type == 'Ready']): - status: "True"(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. errorwith a bare resource ref (name only) asserts the resource does not exist (used for "PVC reclaimed", "no backup schedule", "child has no Gateway HR").scriptruns in the test directory with$NAMESPACEset 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.