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📝 WalkthroughWalkthroughThe controller now supports a ChangesOff-Cluster QEMU over SSH
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~60 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant ExporterSetReconciler
participant QemuSSHProvisioner
participant KubernetesClient
participant SSHHost
participant RemoteHost
ExporterSetReconciler->>QemuSSHProvisioner: Deploy exporter
QemuSSHProvisioner->>KubernetesClient: Read SSH credentials
QemuSSHProvisioner->>SSHHost: Connect using host settings and private key
QemuSSHProvisioner->>SSHHost: Reconcile exporter configuration and Quadlet files
SSHHost->>RemoteHost: Run remote commands and transfer files
QemuSSHProvisioner->>SSHHost: Reload systemd and start services
SSHHost->>RemoteHost: Run systemd commands
QemuSSHProvisioner->>QemuSSHProvisioner: Record host assignment on exporter
Suggested reviewers: Merge Risk: 🟠 High · up to The new off-cluster QEMU provisioner is unlikely to work as shipped. Starting the services fails on every deploy. Even when the services start, the exporter cannot reach QEMU. Remote containers and credentials can also be left behind after cleanup. SSH does not verify host identity, so an attacker who intercepts the connection can obtain the exporter token. The setup guide shows a configuration that the controller rejects. Resolve these issues before merging. Security Architecture ReviewSecurity architecture risk: 🟠 High · up to The new deployment path does not verify the identity of the SSH host before sending exporter configuration. Failures during deployment or cleanup can also leave credentials and services on a remote host after the controller loses track of them. These are material security design risks. Retained concerns
Security review detailsSecurity Blast Radius
Security Findings and Attack Paths
Trust Boundaries and Controls
Resilience and Maintainability Implications
Hardening Proposals
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 28.75% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 80 functions across 14 files. (8 skipped: 8 unsupported.) ✨ Finishing Touches🧪 Generate unit tests (beta)
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| namespace: jumpstarter | ||
| type: kubernetes.io/ssh-auth | ||
| data: | ||
| # Replace with your base64-encoded SSH private key |
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is there a standard way to pass the username here as well?
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kubernetes.io/ssh-auth only defines ssh-privatekey, so the username should stay in the VTC parameters. I added a comment to the secret sample to make that clearer, and also updated the VTC sample to the new single-host model.
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| # Remote lab hosts — each can run up to `slots` concurrent instances | ||
| hosts: | ||
| - name: lab-host-01.example.com | ||
| arch: aarch64 | ||
| slots: 2 | ||
| - name: lab-host-02.example.com | ||
| arch: aarch64 | ||
| slots: 2 |
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Suggested change
| # Remote lab hosts — each can run up to `slots` concurrent instances | |
| hosts: | |
| - name: lab-host-01.example.com | |
| arch: aarch64 | |
| slots: 2 | |
| - name: lab-host-02.example.com | |
| arch: aarch64 | |
| slots: 2 | |
| # Remote lab hosts — each can run up to `slots` concurrent instances | |
| host: lab-host-01.example.com | |
Add the foundational packages for the qemu-ssh.jumpstarter.dev off-cluster provisioner: - ssh_host: RemoteHost interface + SSHHost impl (SSH/SFTP, file reconciliation with sanitized diffs, context-aware commands) - quadlet: Podman .container file generation for runtime + exporter - host_pool: host parsing, slot-based selection, SSH config resolution Part of JEP-0014 Phase 3. Signed-off-by: Bella Khizgiyaev <bkhizgiy@redhat.com>
Signed-off-by: Bella Khizgiyaev <bkhizgiy@redhat.com>
Signed-off-by: Bella Khizgiyaev <bkhizgiy@redhat.com>
Add the Deployer interface for off-cluster provisioners and the qemu-ssh provisioner that deploys exporter + QEMU runtime containers on remote hosts via SSH using Podman quadlets. - deployer.go: Deployer interface (Deploy/IsDeployed) - qemu_ssh.go: provisioner implementing Provisioner + Deployer - enrich.go: off-cluster driver enrichment (launcher_socket, tcp, etc.) - reconciler.go: fork ensureExporterPods for Deployer, fix ExitAndReplace for off-cluster (isExporterOffline) - main.go: register qemu-ssh.jumpstarter.dev provisioner Part of JEP-0014 Phase 3. Signed-off-by: Bella Khizgiyaev <bkhizgiy@redhat.com>
Signed-off-by: Bella Khizgiyaev <bkhizgiy@redhat.com>
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Actionable comments posted: 8
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
In @controller/internal/exporterset/provisioners/qemu-ssh/qemu_ssh.go:
- Around line 324-330: Update the systemd commands in the service-start and
service-stop paths to use `start` and `stop` instead of `enable --now` and
`disable --now` for the Quadlet-generated units. Preserve the existing error
handling and command arguments around `runtimeSvc` and `exporterSvc`.
- Around line 202-207: Update Cleanup’s parameter construction to use
deepMergeParameters with vtc.Spec.Parameters and es.Spec.Parameters, matching
Deploy so ExporterSet host and SSH settings are preserved. Use the merged
parameters for ParseSSHConfig and ParseHost, and handle errors from
unmarshalling and parsing rather than discarding them.
- Around line 218-222: Update Cleanup so a failed SSH Connect returns the
connection error instead of returning nil, allowing the reconciler to retry
cleanup; preserve the existing successful cleanup behavior.
In @controller/internal/exporterset/provisioners/qemu-ssh/quadlet.go:
- Around line 167-173: Update the exporter Quadlet generation in quadlet.go to
place the exporter in the matching runtime container’s network namespace, using
cfg.Name to identify that runtime container; do not use host networking.
In @controller/internal/exporterset/provisioners/qemu-ssh/ssh_host.go:
- Line 99: Replace ssh.InsecureIgnoreHostKey in the SSH connection setup with a
host-key callback that verifies the remote host against a configurable
known_hosts source; require verification and reject connections when no trusted
key source is configured or the key does not match.
In @controller/internal/exporterset/reconciler.go:
- Around line 522-528: Update the reconcile flow around IsDeployed so its true
result does not skip subsequent exporter updates; invoke Deployer.Deploy on
every reconcile so changed remote configuration is applied. Retain IsDeployed
only for the terminal-cleanup decision.
In @docs/source/getting-started/guides/setup/off-cluster-qemu.md:
- Around line 94-100: Update the guide’s Step 3 manifest to use the single
`parameters.host` object with `name`, and document only the supported
`host.name`, `host.user`, and `host.port` fields; remove `arch` and `slots`.
Correct the host-selection description to say each ExporterSet uses one
configured host, with capacity governed by `maxReplicas`, and explain that
additional hosts require additional ExporterSets overriding `parameters.host`.
- Line 228: Update the `podman ps` filter to select generated runtime and
exporter containers by name instead of the unset `managed-by=jumpstarter` label.
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📒 Files selected for processing (22)
controller/cmd/exporter-set-controller/main.gocontroller/config/samples/operator_jumpstarter_with_qemu_ssh.yamlcontroller/config/samples/secret_ssh_credentials.yamlcontroller/config/samples/v1alpha1_exporterset_qemu_ssh.yamlcontroller/config/samples/v1alpha1_virtualtargetclass_qemu_ssh.yamlcontroller/deploy/operator/go.modcontroller/go.modcontroller/internal/exporterset/deployer.gocontroller/internal/exporterset/provisioners/qemu-ssh/enrich.gocontroller/internal/exporterset/provisioners/qemu-ssh/enrich_test.gocontroller/internal/exporterset/provisioners/qemu-ssh/host.gocontroller/internal/exporterset/provisioners/qemu-ssh/host_test.gocontroller/internal/exporterset/provisioners/qemu-ssh/qemu_ssh.gocontroller/internal/exporterset/provisioners/qemu-ssh/qemu_ssh_test.gocontroller/internal/exporterset/provisioners/qemu-ssh/quadlet.gocontroller/internal/exporterset/provisioners/qemu-ssh/quadlet_test.gocontroller/internal/exporterset/provisioners/qemu-ssh/ssh_host.gocontroller/internal/exporterset/provisioners/qemu-ssh/ssh_host_test.gocontroller/internal/exporterset/reconciler.gocontroller/internal/exporterset/reconciler_test.godocs/source/getting-started/guides/setup/index.mddocs/source/getting-started/guides/setup/off-cluster-qemu.md
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Add example CRs (VirtualTargetClass, ExporterSet, Jumpstarter CR, SSH Secret) and a setup guide for the qemu-ssh.jumpstarter.dev provisioner. Part of JEP-0014 Phase 3. Signed-off-by: Bella Khizgiyaev <bkhizgiy@redhat.com>
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Adds example CRs (VirtualTargetClass, ExporterSet, Jumpstarter CR, SSH Secret) and an admin setup guide for deploying virtual targets on remote lab hosts using the qemu-ssh.jumpstarter.dev provisioner. (JEP-0014 Phase 3)