From c7edc81239839e00ff2ab463f0df5144b09a5915 Mon Sep 17 00:00:00 2001
From: jenkins <jenkins@bstein.dev>
Date: Fri, 22 May 2026 17:10:01 -0300
Subject: [PATCH] maintenance: stabilize recovered worker nodes

---
 .../core/node-prefer-noschedule-cronjob.yaml  | 47 +++++++++++++++----
 .../titan-22-link-keeper-daemonset.yaml       | 36 +++++++-------
 2 files changed, 55 insertions(+), 28 deletions(-)

diff --git a/infrastructure/core/node-prefer-noschedule-cronjob.yaml b/infrastructure/core/node-prefer-noschedule-cronjob.yaml
index dd4257df..2cad93d5 100644
--- a/infrastructure/core/node-prefer-noschedule-cronjob.yaml
+++ b/infrastructure/core/node-prefer-noschedule-cronjob.yaml
@@ -5,17 +5,17 @@ metadata:
   name: node-prefer-noschedule
   namespace: kube-system
 spec:
-  schedule: "*/20 * * * *"
-  concurrencyPolicy: Forbid
+  schedule: "* * * * *"
+  concurrencyPolicy: Replace
   successfulJobsHistoryLimit: 1
   failedJobsHistoryLimit: 3
   jobTemplate:
     spec:
-      backoffLimit: 1
+      backoffLimit: 0
       template:
         spec:
           serviceAccountName: node-prefer-noschedule
-          restartPolicy: OnFailure
+          restartPolicy: Never
           containers:
             - name: taint
               image: bitnami/kubectl@sha256:554ab88b1858e8424c55de37ad417b16f2a0e65d1607aa0f3fe3ce9b9f10b131
@@ -24,11 +24,42 @@ spec:
                 - bash
                 - -ceu
                 - |
+                  k() {
+                    kubectl --request-timeout=10s "$@"
+                  }
+
+                  clear_worker() {
+                    local node="${1}"
+                    local hardware="${2}"
+                    if k get node "${node}" >/dev/null 2>&1; then
+                      k label node "${node}" node-role.kubernetes.io/worker=true "hardware=${hardware}" --overwrite=true || true
+                      k label node "${node}" atlas.bstein.dev/spillover- || true
+                      k taint node "${node}" node.kubernetes.io/unschedulable:NoSchedule- || true
+                      k uncordon "${node}" || true
+                    else
+                      echo "skipping missing node ${node}"
+                    fi
+                  }
+
+                  clear_worker titan-04 rpi5
+                  clear_worker titan-05 rpi5
+                  clear_worker titan-07 rpi5
+                  clear_worker titan-08 rpi5
+                  clear_worker titan-11 rpi5
+                  clear_worker titan-12 rpi4
+                  clear_worker titan-14 rpi4
+                  clear_worker titan-18 rpi4
+                  clear_worker titan-22 amd64
+
+                  if k get node titan-22 >/dev/null 2>&1; then
+                    k label node titan-22 atlas.bstein.dev/general-compute=last-resort --overwrite=true || true
+                  fi
+
                   for node in titan-13 titan-15 titan-17 titan-19; do
-                    if kubectl get node "${node}" >/dev/null 2>&1; then
-                      kubectl label node "${node}" atlas.bstein.dev/spillover=true --overwrite=true
-                      kubectl taint node "${node}" longhorn=true:PreferNoSchedule --overwrite=true
-                      kubectl taint node "${node}" atlas.bstein.dev/spillover=true:PreferNoSchedule --overwrite=true
+                    if k get node "${node}" >/dev/null 2>&1; then
+                      k label node "${node}" atlas.bstein.dev/spillover=true longhorn-host=true --overwrite=true || true
+                      k taint node "${node}" longhorn=true:PreferNoSchedule --overwrite=true || true
+                      k taint node "${node}" atlas.bstein.dev/spillover=true:PreferNoSchedule --overwrite=true || true
                     else
                       echo "skipping missing node ${node}"
                     fi
diff --git a/services/maintenance/titan-22-link-keeper-daemonset.yaml b/services/maintenance/titan-22-link-keeper-daemonset.yaml
index 89c4370f..a0b88c95 100644
--- a/services/maintenance/titan-22-link-keeper-daemonset.yaml
+++ b/services/maintenance/titan-22-link-keeper-daemonset.yaml
@@ -59,32 +59,28 @@ spec:
               while true; do
                 nsenter -t 1 -m -u -i -n -p -- /bin/sh -lc '
                   date -Is
-                  if ethtool enp5s0 | grep -q "Link detected: yes"; then
-                    ethtool enp5s0 | sed -n "1,25p" || true
-                    ip -br addr show enp5s0 || true
-                    exit 0
-                  fi
-
-                  echo "link down; attempting recovery"
                   ip link set enp5s0 up || true
                   ethtool --set-eee enp5s0 eee off || true
-                  ethtool -s enp5s0 advertise 0x80000000002f autoneg on || ethtool -s enp5s0 autoneg on || true
-                  sleep 5
+                  ethtool -s enp5s0 advertise 0x020 autoneg on || true
+                  sleep 3
 
-                  if ! ethtool enp5s0 | grep -q "Link detected: yes"; then
-                    echo "link still down after autoneg; trying forced 2.5G"
-                    ethtool -s enp5s0 speed 2500 duplex full autoneg off || true
-                    sleep 3
-                  fi
-
-                  if ! ethtool enp5s0 | grep -q "Link detected: yes"; then
-                    echo "link still down after 2.5G; trying forced 1G"
-                    ethtool -s enp5s0 speed 1000 duplex full autoneg off || true
-                    sleep 3
+                  stable=true
+                  for _ in 1 2 3 4 5; do
+                    if ! ethtool enp5s0 | grep -q "Link detected: yes"; then
+                      stable=false
+                    fi
+                    sleep 2
+                  done
+
+                  if [ "${stable}" != "true" ]; then
+                    echo "link not stable at 1G-only; falling back to 100M-only autoneg"
+                    ethtool -s enp5s0 advertise 0x008 autoneg on || true
+                    sleep 5
                   fi
 
+                  ethtool --show-eee enp5s0 || true
                   ethtool enp5s0 | sed -n "1,45p" || true
                   ip -br addr show enp5s0 || true
                 '
-                sleep 60
+                sleep 30
               done