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https://github.com/cozystack/cozystack.git
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Aleksei Sviridkin
c1071dab9b
## What this PR does Both tenant Kubernetes e2e suites keep missing the node-Ready budget with zero Nodes registered, and the time goes inside the guest, between the worker VMI reaching Running and Talos asking for its apid certificate. Nothing collected today reaches that window. The in-guest capture the harness already has drives `talosctl`, so it needs the apid the worker never got to, and the management side has neither a Node nor a certificate request to read. Four attempts at this failure have been designed from outside the guest; the most recent raised the budget from 12m to 18m and the same fingerprint came back at the new deadline. KubeVirt can stream a VM's guest serial console into a `guest-console-log` container beside virt-launcher, readable with `kubectl logs` and needing nothing from inside the guest — no talosctl, no client certificate, no helper Pod, no reachable apid. That is the one property this failure class demands, so this turns it on for the suite's worker node group and collects it into the diagnostic bundle when node-join fails, ahead of the `talosctl` capture that cannot describe the same runs. Reads start at the beginning of the stream rather than tailing it: a guest that repaints its console would push the boot output out of any `--tail` window, while `--limit-bytes` truncates from the far end instead. Every read is bounded, and the walk stops at a cap that records both counts, so the collector cannot become an unbounded term in a failure path that already runs several others under one deadline. A read that returns no console is not filed as a quiet guest. Three outcomes get three labels, because only one of them says anything about the guest: the read failed and returned nothing, the read succeeded and returned nothing, or it broke off part way. Each read's stderr is kept beside the capture rather than inside it — kubectl's own `container guest-console-log is not valid for pod` would otherwise fill the file, and a console that never started would read as one that had spoken. That case is the headline one here, so the Pod state and events that explain it are collected alongside, once for the whole selector. The switch is a new opt-in `logSerialConsole` on a node group, off by default. It renders nothing unless set to true, including when set to false, because the `KubevirtMachineTemplate` is content-hash named and a byte emitted for a group that did not ask for it renames the template and rolls every live worker VM on upgrade. I verified that by rendering the base tree and this branch: absent and explicit-false produce a byte-identical template name on both charts. Worker VMs come from two charts, `kubernetes` and `kubernetes-nodes`; both carry the field, and the golden-parity check between them gains a case that keeps their output identical. The passing path checks separately that the container actually attached, and runs that check last, after everything the suite exists to prove — a debugging aid should not preempt the assertions that cover the cluster. Without it the suite would first learn the setting was inert in the one run that needed the console, when it can no longer be recovered. Relates to #3513. ### The risk this carries, stated up front The platform turns serial console logging off cluster-wide in the KubeVirt CR. That setting is a mitigation added in February 2026 for kubevirt/kubevirt#15989, where the `guest-console-log` container kept virt-launcher from starting and left VMs in `PodInitializing`. A per-VM `logSerialConsole` takes precedence over it — `isSerialConsoleLogEnabled` reads the VMI field first and only then falls back to the cluster setting — which is what makes this work, and also makes this the first thing on the platform to go through that mitigation. The mitigation was written against KubeVirt v1.6.x; the platform now ships v1.8.4, and the upstream issue is still open with no reproduction reported either way on the newer version. So the first run of these suites is also the experiment, and it doubles as a revalidation of that February mitigation on the version actually shipping, which nobody has done. The two outcomes are distinguishable rather than ambiguous: kubevirt/kubevirt#15989 shows up as virt-launcher wedged in `PodInitializing` with the VMI never reaching Running, while the failure this instruments shows the VMI Running and zero certificate requests. A red run with the first signature is an answer, not noise — and the collector is built so that it says which one happened instead of reporting silence. The blast radius is small: the product field is absent by default and only the e2e node group sets it, so backing this out is one line. The revert criterion, stated before the run rather than after it. If worker virt-launcher Pods sit in `Init` on `guest-console-log` and no Node registers, kubevirt/kubevirt#15989 still reproduces on v1.8.4: drop the `logSerialConsole: true` line from the e2e node group, keep the chart field, and the upstream issue gains the reproduction on a current version that its thread does not have. If the Pods reach Running and the console logs carry boot output, the mitigation is a candidate for removal platform-wide, which is its own change. Either way the run answers something that was open before it. Dropping `virtualMachineOptions.disableSerialConsoleLog` outright was the alternative. It is a smaller diff and needs no values key, but it exposes every VM on the platform to a race nobody has re-tested, instead of one node group in one test. That is its own revalidation exercise and belongs in its own change, on evidence this one produces. ### Verification `make unit-tests` passes. The new bats suite runs green under both `bash` and a `dash` `/bin/sh`, which matters because `hack/cozytest.sh` is `#!/bin/sh` and an earlier revision of this branch carried a bash-only construct that failed silently there. Every test in it is killed by a specific mutation of the code it covers. Both charts' helm-unittest suites pass, the golden-parity script reports byte-identical output across all four cases including the new one, and `make generate` is idempotent at the repo root. Reviewed by Claude across several rounds and by an independent second reader; the review loop found and fixed real defects in this branch, including a green-path check that had become unable to report the one thing it existed for. ### Screenshots Not a UI change. ### Downstream repositories - [ ] No downstream repository is affected by this change - [ ] [cozystack/website](https://github.com/cozystack/website) - follow-up: - [x] [cozystack/terraform-provider-cozystack](https://github.com/cozystack/terraform-provider-cozystack) - follow-up: https://github.com/cozystack/terraform-provider-cozystack/issues/26 - [ ] [cozystack/ansible-cozystack](https://github.com/cozystack/ansible-cozystack) - follow-up: - [ ] [cozystack/ccp](https://github.com/cozystack/ccp) - follow-up: - [ ] [cozystack/talm](https://github.com/cozystack/talm) - follow-up: - [ ] [cozystack/cozyhr](https://github.com/cozystack/cozyhr) - follow-up: - [ ] [cozystack/cozy-proxy](https://github.com/cozystack/cozy-proxy) - follow-up: - [ ] [cozystack/cozystack-telemetry-server](https://github.com/cozystack/cozystack-telemetry-server) - follow-up: - [ ] [cozystack/external-apps-example](https://github.com/cozystack/external-apps-example) - follow-up: - [ ] [cozystack/examples](https://github.com/cozystack/examples) - follow-up: ### Release note ```release-note feat(kubernetes): worker node groups accept `logSerialConsole`, which streams a worker VM's guest serial console into a `guest-console-log` container readable with `kubectl logs`. Off by default. It is the only way to observe a worker that stalls during boot before Talos apid answers, when no Node and no certificate request exist to diagnose from. Enabling it rolls the node group and overrides the platform's cluster-wide `disableSerialConsoleLog`. ``` <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **New Features** * Added an optional `logSerialConsole` setting for Kubernetes worker node groups. * Streams worker VM guest serial-console output to a dedicated log container when enabled. * Configuration is disabled by default and available through Kubernetes application settings. * **Bug Fixes** * Improved worker failure diagnostics with bounded serial-console output and pod-state information. * Validates that enabled worker pools attach the expected console-log container. * **Documentation** * Documented configuration behavior, rollout effects, defaults, and timeout considerations. * **Tests** * Added coverage for rendering, attachment validation, capture limits, and failure scenarios. <!-- end of auto-generated comment: release notes by coderabbit.ai -->