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update reboot-server skill: priority-based shutdown, 420s VM timeout

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Viktor Barzin 2026-04-05 20:53:55 +03:00
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commit ca1c1a8c2a
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85
dot_claude/skills/reboot-server.md
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@ -28,11 +28,11 @@ Shorthand used below: `KC="KUBECONFIG=/Users/viktorbarzin/code/config kubectl"`
| 2 | 9000 | TrueNAS | 60s | 300s | NFS storage — needs network from pfSense |
| 3 | 220 | docker-registry | 60s | 120s | Pull-through cache (fallback: upstream) |
| 3 | 102 | devvm | 60s | 120s | Dev VM — needs pfSense for network |
| 4 | 200 | k8s-master | 45s | 300s | Control plane — must be up before workers |
| 5 | 201 | k8s-node1 | 45s | 300s | GPU node (Tesla T4) |
| 5 | 202 | k8s-node2 | 45s | 300s | Worker |
| 5 | 203 | k8s-node3 | 45s | 300s | Worker |
| 5 | 204 | k8s-node4 | 45s | 300s | Worker |
| 4 | 200 | k8s-master | 45s | 420s | Control plane — must be up before workers |
| 5 | 201 | k8s-node1 | 45s | 420s | GPU node (Tesla T4) |
| 5 | 202 | k8s-node2 | 45s | 420s | Worker |
| 5 | 203 | k8s-node3 | 45s | 420s | Worker |
| 5 | 204 | k8s-node4 | 45s | 420s | Worker |
| 6 | 103 | home-assistant | 0s | 120s | HA Sofia — no ordering dependency |
| 6 | 300 | Windows10 | 0s | 120s | Windows VM — no ordering dependency |
@ -85,47 +85,74 @@ qm set 101 --startup order=1,down=120
qm set 9000 --startup order=2,up=60,down=300
qm set 102 --startup order=3,up=60,down=120
qm set 220 --startup order=3,up=60,down=120
qm set 200 --startup order=4,up=45,down=300
qm set 201 --startup order=5,up=45,down=300
qm set 202 --startup order=5,up=45,down=300
qm set 203 --startup order=5,up=45,down=300
qm set 204 --startup order=5,up=45,down=300
qm set 200 --startup order=4,up=45,down=420
qm set 201 --startup order=5,up=45,down=420
qm set 202 --startup order=5,up=45,down=420
qm set 203 --startup order=5,up=45,down=420
qm set 204 --startup order=5,up=45,down=420
qm set 103 --startup order=6,down=120
qm set 300 --startup order=6,down=120
'
```
### PF-4: Check kubelet shutdownGracePeriod on all k8s nodes
### PF-4: Check kubelet priority-based shutdown on all k8s nodes
Kubelet uses `shutdownGracePeriodByPodPriority` for ordered pod shutdown (lowest priority stopped first):
| Priority | Tier | Grace | Stopped |
|----------|------|-------|---------|
| 0 | unclassified | 20s | 1st |
| 200000 | tier-4-aux | 20s | 2nd |
| 400000 | tier-3-edge | 30s | 3rd |
| 600000 | tier-2-gpu | 30s | 4th |
| 800000 | tier-1-cluster (DBs) | 90s | 5th |
| 1000000 | tier-0-core | 30s | 6th |
| 1200000 | gpu-workload | 30s | 7th |
| 2000000000 | system-cluster-critical | 30s | 8th |
| 2000001000 | system-node-critical | 30s | 9th (last) |
**Total: 310s kubelet, 420s VM timeout, 480s InhibitDelay**
```bash
for VMID in 200 201 202 203 204; do
echo "=== VMID $VMID ==="
ssh root@192.168.1.127 "qm guest exec $VMID -- grep -c shutdownGracePeriod /var/lib/kubelet/config.yaml 2>/dev/null" || echo "NOT SET"
ssh root@192.168.1.127 "qm guest exec $VMID -- grep -c shutdownGracePeriodByPodPriority /var/lib/kubelet/config.yaml 2>/dev/null" || echo "NOT SET"
done
```
If not set on any node, patch it:
If not set on any node, patch it with the python3/yaml approach:
```bash
VMID=<target>
ssh root@192.168.1.127 "qm guest exec $VMID -- python3 -c \"
import yaml
with open('/var/lib/kubelet/config.yaml') as f:
cfg = yaml.safe_load(f)
cfg.pop('shutdownGracePeriod', None)
cfg.pop('shutdownGracePeriodCriticalPods', None)
cfg.pop('shutdownGracePeriodByPodPriority', None)
cfg['shutdownGracePeriodByPodPriority'] = [
{'priority': 0, 'shutdownGracePeriodSeconds': 20},
{'priority': 200000, 'shutdownGracePeriodSeconds': 20},
{'priority': 400000, 'shutdownGracePeriodSeconds': 30},
{'priority': 600000, 'shutdownGracePeriodSeconds': 30},
{'priority': 800000, 'shutdownGracePeriodSeconds': 90},
{'priority': 1000000, 'shutdownGracePeriodSeconds': 30},
{'priority': 1200000, 'shutdownGracePeriodSeconds': 30},
{'priority': 2000000000, 'shutdownGracePeriodSeconds': 30},
{'priority': 2000001000, 'shutdownGracePeriodSeconds': 30},
]
with open('/var/lib/kubelet/config.yaml', 'w') as f:
yaml.dump(cfg, f, default_flow_style=False)
print('done')
\""
# Update systemd timeouts to match
ssh root@192.168.1.127 "qm guest exec $VMID -- bash -c '
sed -i \"/shutdownGracePeriod/d; /shutdownGracePeriodCriticalPods/d\" /var/lib/kubelet/config.yaml
cat >> /var/lib/kubelet/config.yaml <<EOF
shutdownGracePeriod: \"240s\"
shutdownGracePeriodCriticalPods: \"60s\"
EOF
mkdir -p /etc/systemd/logind.conf.d
cat > /etc/systemd/logind.conf.d/kubelet-shutdown.conf <<EOF
[Login]
InhibitDelayMaxSec=300
EOF
echo -e \"[Login]\nInhibitDelayMaxSec=480\" > /etc/systemd/logind.conf.d/kubelet-shutdown.conf
systemctl restart systemd-logind
mkdir -p /etc/systemd/system/kubelet.service.d
cat > /etc/systemd/system/kubelet.service.d/20-shutdown.conf <<EOF
[Service]
TimeoutStopSec=300s
EOF
echo -e \"[Service]\nTimeoutStopSec=420s\" > /etc/systemd/system/kubelet.service.d/20-shutdown.conf
systemctl daemon-reload
systemctl restart kubelet
'"