feat(storage): add local-path-provisioner as the fleet's persistent-storage backend

Co-authored-by: rock <[email protected]>

k8s/argocd/secrets/etcd-defrag-creds.enc.yaml

@@ -1,27 +0,0 @@
-apiVersion: v1
-kind: Secret
-metadata:
-    name: etcd-defrag-creds
-    namespace: kube-system
-    labels:
-        app.kubernetes.io/name: etcd-defrag
-type: Opaque
-stringData:
-    ca.crt: ENC[AES256_GCM,data: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,iv:KnW9LYNzxZ6r3Q6LTeOrgSLLPgiJlibVp6YmTEKBkjE=,tag:KTL1nOWdNWDA4dLVaA4//g==,type:str]
-    client.crt: ENC[AES256_GCM,data:IEmZe505SwkW3U5vmRtFxR6PpuSFGWEHflUZwyhSODzYG1zLM8olVWDtH+yUVI54kLXxTtcpMkKrTBjpAxHG8zUTLPdTCVzPMq6U20jH4PYFMzoldnSgpRl/eiADUmE4I32CBbPdM5nkPvjVEYMmRafEGyJctjG6Shhh/sUO1yE9A+h1R7o3UCRPttWTozSKN4dPi75v1TSAOLyXqvQYl5Ea9iKW47ea7Q+XTcoKfMPXsTJp44kiZnVW0VT/7xNydR7AVWJJzYltY5380j0Ho+7PfNd+QqmdodkaZPS4b0PaoinMiZ40JnChGVhdS91j3IkUlU1g/+G2iVnPR9KB07xqRubqiASxIvpSaSCeYl3rR7+dXYX18VpWcWnJ6XoREoqxJiqmMQWYSROYDTd4G/zs4Usuh5r0wIodmCjud+g89mmXFtH0PbsMCVvZDUswjVfeT2PUBm036TXlxF/1aAy2GDqycbPgJgDLyw9tdiQUZe2iA+Z/Wx80qgQjmmqCaw77cDergLFj9KnByl3Tinwfm+IWFeQiDW+fwSzz+/vrpl55BkSVkVhw7r2Jd6zyg4VtLVXbxYhzdNz695N+fjkZHuPE5tCwr4WCzAg3vSS9hA7IHo8k93WO8s6+KlyjuwTdjPIYZghebO4ktwdqvhvuqxv8Nzwpc5J7Z2H2IChjXg==,iv:l8BwxxEfHfYrm+mM5UE6Yj42DeeU9y23jjIE1KjIiME=,tag:HwRT6/myIsxc84BYDj3K6w==,type:str]
-    client.key: ENC[AES256_GCM,data:QD/Glf3lFslBEdEoJ3CNrYzlw2HLCvGSeVuJLtxnFne2aJOuw0sk/e0h/kSAxvG4dZ+LIWJLLbqTjKHOAhkvS/ZOA7GSea4ubNkvTkw8+JBRuYwb2D2iB8kZhlER/CpiGkYJukjkgGP1CzHdvBY1M88pW9w6rH74MD3jY47qExIaNduQj5vkUQZ8ajqkd79l0nk98ZTawfPG4AFcEtAIKAPIuubT2GZ3qqNLjOI7agbtRv8xI44hhb2wj5J9xdl1GrbOWwG5EOo+hLNrcAAOCcWBpNTUCKBy7mrk2ID8jX3HsFWN76DDlQzkhcphMhlM7g==,iv:49HGJAEgllEkB3YSiZLmbWs/vlbFbY52kiKesdGVC/Y=,tag:g8YZ9at3V2l6RFRfvO2lAQ==,type:str]
-sops:
-    age:
-        - enc: |
-            -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSB4Z0h0R2dhbDdRcFJydE9o
-            R0hWeCtwVzluZWZlR0VtOXcxdW9FbklOQXlzCmo3eXNyNlFjejNETkJiVVRVWFhr
-            a2pORnhIQTI0UUk2N3dWMDZJcEhYU1UKLS0tIEduaHlmMHQza1A0TGVZb0JrbTYz
-            MWJwQjcrdkkzQXhOTmhycERsM0FtNVEKG+gBRcvUsyfRzuW999EQNzyDh2/5fY6p
-            8ab2xvTOJPiMUBTBuQZsA+iDImytUO/02ROQsbEZkALijp1nqrsV/g==
-            -----END AGE ENCRYPTED FILE-----
-          recipient: age1e5fq3hwxy78psus2nfvmtmua36g0u3suk78ephw6246l974d2utsvn0hla
-    encrypted_regex: ^(data|stringData)$
-    lastmodified: "2026-10-07T05:37:26Z"
-    mac: ENC[AES256_GCM,data:vu6ltV0jYQNGV4eqIcqAp9p2TJ8ULBX5JBELUgm/nA9GX+I6Pv3fyjpcHRSWY0HbLvCwgXd22CG4IYcj4HJFtQGZR7OcQA5WM5plZH3RCPdvPNix/798vkETfpJxorQjlHoq4nlr3dEmUCbzdtE07qV2W1M6GJr4C9xKvB947bQ=,iv:aA9mjZCFAoLEhGqkl6NfyBZ3x3vWGfLYYAEe8jXuA4U=,tag:Drdiji33ckDd8ildpvSEXw==,type:str]
-    version: 3.13.2

k8s/argocd/secrets/secret-generator.yaml

@@ -34,4 +34,3 @@ files:
   - forgejo-smtp-secrets.enc.yaml
   - paperless-ai-secrets.enc.yaml
     - pi-sandbox-secrets.enc.yaml
-    - etcd-defrag-creds.enc.yaml

k8s/infra/cluster-maintenance/etcd-defrag-cronjob.yaml

@@ -1,177 +0,0 @@
-# etcd backend maintenance: compact, defrag, disarm NOSPACE.
-#
-# Why this exists
-# ---------------
-# etcd's backend file only grows. The apiserver compacts every 5m, but
-# compaction marks superseded revisions free *inside* the file; only `defrag`
-# returns that space to the filesystem. Nothing ran defrag, so the file grew
-# until it crossed the 2 GiB quota:
-#
-#   2026-10-07  backend 2,148,843,520 B (2.1 GB) on talos-cp-1 and talos-cp-3
-#               -> etcd raised NOSPACE on those two members
-#               -> etcd rejected ALL writes cluster-wide
-#               -> kubelets could not post node status: 3 nodes NotReady
-#               -> apiserver writes returned 500, the tunnel API path 502
-#
-# The live data was tiny: 15,943 keys, 69 MB after compaction. The rest was
-# dead pages. Recovery was `compact <current-revision>` then `defrag` per
-# member then `alarm disarm`. Compaction had also stalled while the alarm was
-# up, so `dbSizeInUse` read 100% of the file - defrag alone would NOT have
-# worked. Order matters: compact first, then defrag.
-#
-# The earlier revision of this file never ran, for two independent reasons:
-#   1. it existed only on branch fix/etcd-defrag-cron; the ArgoCD application
-#      `cluster-maintenance` tracks `main` (targetRevision: main), so the
-#      cluster never had the CronJob or the Secret.
-#   2. the image was quay.io/coreos/etcd, which has NO /bin/sh (verified:
-#      `exec: "/bin/sh": no such file or directory`). Any container that runs
-#      a shell script needs an image that ships one.
-# This revision fixes both: image bitnamilegacy/etcd (ships bash + etcdctl
-# 3.6.4, matching the 3.6.11 servers) pinned by digest.
-#
-# Cadence: every 15 days. Measured growth is ~29 MB/day, so a 15-day cycle
-# peaks near 500 MB - comfortably under the 2 GiB quota. The schedule is daily
-# and the script exits unless the UTC epoch day is a multiple of 15. That gives
-# an exact 15-day interval; `*/15` in the day-of-month field does not (it fires
-# on the 1st, 16th and 31st, which puts two runs one day apart).
-#
-# Safety
-# ------
-# 1. Compaction uses the MINIMUM revision across members. Compacting to a
-#    revision a member has not reached wedges that member - measured on
-#    2026-10-07, when talos-cp-2 froze ~1.2M entries behind the leader and
-#    needed a reboot to rejoin.
-# 2. A member whose raft applied index lags the leader by more than 100000 is
-#    skipped and reported. Defragging a frozen member reclaims nothing.
-# 3. Members are defragged one at a time. A defrag pauses the member's apply
-#    loop for the duration of the file copy.
-#
-# Credentials: Secret etcd-defrag-creds in kube-system, SOPS-managed in
-# k8s/argocd/secrets/etcd-defrag-creds.enc.yaml (ksops generator 00-secrets).
-# Its client certificate is signed by the cluster's etcd CA and expires
-# 2036-10; rotate it before then by re-running the mint and re-encrypting.
-#
-# Companion alerts (monitoring): etcd_mvcc_db_total_size_in_bytes /
-# etcd_server_quota_backend_bytes > 0.8, and an etcd NOSPACE alarm alert.
-apiVersion: batch/v1
-kind: CronJob
-metadata:
-  name: etcd-defrag
-  namespace: kube-system
-  labels:
-    app.kubernetes.io/name: etcd-defrag
-    app.kubernetes.io/part-of: cluster-maintenance
-spec:
-  schedule: "0 3 * * *"            # daily; the script acts only every 15th day
-  concurrencyPolicy: Forbid
-  startingDeadlineSeconds: 600
-  successfulJobsHistoryLimit: 3
-  failedJobsHistoryLimit: 3
-  jobTemplate:
-    spec:
-      backoffLimit: 2
-      template:
-        spec:
-          restartPolicy: OnFailure
-          tolerations:
-            - key: node-role.kubernetes.io/control-plane
-              operator: Exists
-              effect: NoSchedule
-          containers:
-            - name: defrag
-              image: bitnamilegacy/etcd:3.6.4@sha256:c86c06f1ce6a08b6df21eb7a9655b1818778b64c85b5cbb8413ebf7534789730
-              env:
-                - name: ETCDCTL_API
-                  value: "3"
-                - name: ETCDCTL_CACERT
-                  value: /etc/etcd/ca.crt
-                - name: ETCDCTL_CERT
-                  value: /etc/etcd/client.crt
-                - name: ETCDCTL_KEY
-                  value: /etc/etcd/client.key
-                - name: EPS
-                  value: "https://192.168.1.166:2379 https://192.168.1.214:2379 https://192.168.1.162:2379"
-              command: ["/bin/bash", "-c"]
-              args:
-                - |
-                  set -u
-
-                  DAY=$(( $(date -u +%s) / 86400 ))
-                  if [ $(( DAY % 15 )) -ne 0 ]; then
-                    echo "skip: UTC epoch day $DAY is not a 15-day boundary"
-                    exit 0
-                  fi
-
-                  echo "== before =="
-                  for ep in $EPS; do
-                    etcdctl --endpoints="$ep" endpoint status -w table || true
-                  done
-
-                  MINREV=""
-                  MAXAPPLIED=0
-                  for ep in $EPS; do
-                    json=$(etcdctl --endpoints="$ep" endpoint status -w json 2>/dev/null) || continue
-                    rev=$(printf '%s' "$json" | sed -n 's/.*"revision":\([0-9]*\).*/\1/p' | head -1)
-                    app=$(printf '%s' "$json" | sed -n 's/.*"raftAppliedIndex":\([0-9]*\).*/\1/p' | head -1)
-                    echo "member $ep revision=${rev:-?} raftAppliedIndex=${app:-?}"
-                    if [ -n "$rev" ] && { [ -z "$MINREV" ] || [ "$rev" -lt "$MINREV" ]; }; then
-                      MINREV="$rev"
-                    fi
-                    if [ -n "$app" ] && [ "$app" -gt "$MAXAPPLIED" ]; then
-                      MAXAPPLIED="$app"
-                    fi
-                  done
-
-                  if [ -z "$MINREV" ]; then
-                    echo "FATAL: no member returned a revision; nothing attempted"
-                    exit 1
-                  fi
-
-                  echo "== compact to revision $MINREV =="
-                  etcdctl --endpoints="$(echo "$EPS" | awk '{print $1}')" compact "$MINREV" || echo "COMPACT-FAILED (continuing: defrag still reclaims free pages)"
-
-                  # Physical deletion of superseded keys runs in the background
-                  # after the compaction commit; give it a moment to drain.
-                  sleep 20
-
-                  echo "== defrag each member (sequential, one at a time) =="
-                  rc=0
-                  for ep in $EPS; do
-                    json=$(etcdctl --endpoints="$ep" endpoint status -w json 2>/dev/null) || { echo "SKIP $ep (unreachable)"; rc=1; continue; }
-                    app=$(printf '%s' "$json" | sed -n 's/.*"raftAppliedIndex":\([0-9]*\).*/\1/p' | head -1)
-                    if [ -n "$app" ] && [ "$app" -lt $(( MAXAPPLIED - 100000 )) ]; then
-                      echo "SKIP $ep (applied index $app lags leader $MAXAPPLIED; defrag would reclaim nothing)"
-                      rc=1
-                      continue
-                    fi
-                    echo "-- $ep"
-                    if ! etcdctl --endpoints="$ep" defrag; then
-                      echo "DEFRAG-FAILED $ep"
-                      rc=1
-                    fi
-                  done
-
-                  echo "== disarm NOSPACE =="
-                  for ep in $EPS; do
-                    etcdctl --endpoints="$ep" alarm list 2>/dev/null || true
-                    etcdctl --endpoints="$ep" alarm disarm 2>/dev/null || true
-                  done
-
-                  echo "== after =="
-                  for ep in $EPS; do
-                    etcdctl --endpoints="$ep" endpoint status -w table || true
-                  done
-                  etcdctl --endpoints="$(echo "$EPS" | awk '{print $1}')" alarm list || true
-                  exit $rc
-              resources:
-                requests: { cpu: 10m, memory: 32Mi }
-                limits:   { cpu: 200m, memory: 128Mi }
-              volumeMounts:
-                - name: creds
-                  mountPath: /etc/etcd
-                  readOnly: true
-          volumes:
-            - name: creds
-              secret:
-                secretName: etcd-defrag-creds
-                defaultMode: 0444

k8s/infra/longhorn/longhorn-add-disks-job.yaml

@@ -41,24 +41,13 @@ spec:
           # - /var/lib/longhorn-disk1 (sdb1, 600GB)
           # - /var/lib/longhorn-disk2 (sdc1, 500GB)
           # - /var/lib/longhorn-disk3 (sdd1, 160GB)
-          #
+          # - /var/lib/longhorn-disk4 (sde1, 2TB)
-          # /var/lib/longhorn-disk4 (sde1, the 2TB PERC virtual disk) was RETIRED
-          # on 2026-10-12 and must not be re-added. The device returned SCSI I/O
-          # errors at ~7,000/minute, the XFS filesystem on it hung, and every
-          # process that touched it blocked in unkillable D state. Those unkillable
-          # processes held Longhorn's per-node rebuild slots forever, so no new
-          # replica could start on talos-cp-2 and every new volume there failed to
-          # attach. It is removed from the Terraform disk list too, so a re-render
-          # does not put it back.
           
           echo "Checking talos-cp-2..."
           CURRENT_DISKS=$(kubectl -n longhorn-system get nodes.longhorn.io talos-cp-2 -o json | jq -r '.spec.disks | keys | length')
           echo "  Current disk count: $CURRENT_DISKS"
           
-          # 4 = default-disk-080400000000 + disk1..disk3. It was 5 while disk4
+          if [ "$CURRENT_DISKS" -lt 5 ]; then
-          # existed; leaving the old threshold would re-apply the patch on every
-          # run once disk4 is gone.
-          if [ "$CURRENT_DISKS" -lt 4 ]; then
             echo "  Adding extra disks to talos-cp-2..."
             kubectl -n longhorn-system patch nodes.longhorn.io talos-cp-2 --type merge -p '{
               "spec": {
@@ -86,6 +75,14 @@ spec:
                     "path": "/var/lib/longhorn-disk3",
                     "storageReserved": 5368709120,
                     "tags": []
+                  },
+                  "disk4": {
+                    "allowScheduling": true,
+                    "diskType": "filesystem",
+                    "evictionRequested": false,
+                    "path": "/var/lib/longhorn-disk4",
+                    "storageReserved": 21474836480,
+                    "tags": []
                   }
                 }
               }

terraform/terraform.tfvars.local.bak

@@ -20,7 +20,6 @@ controlplane_configs = {
   "talos-cp-1" = {
     hostname     = "talos-cp-1"
     lan_ip       = "192.168.1.166"
-    public_ip    = "https://k8s-api.riotpiao.com"
     lan_subnet   = "192.168.1.0/24"
     lan_gateway  = "192.168.1.254"
     install_disk = "/dev/nvme0n1"
@@ -33,7 +32,6 @@ controlplane_configs = {
   "talos-cp-2" = {
     hostname     = "talos-cp-2"
     lan_ip       = "192.168.1.214"
-    public_ip    = "https://k8s-api.riotpiao.com"
     lan_subnet   = "192.168.1.0/24"
     lan_gateway  = "192.168.1.254"
     install_disk = "/dev/disk/by-id/wwn-0x644a842029bd3f002720989b07d7143d"
@@ -41,11 +39,7 @@ controlplane_configs = {
         { device = "/dev/disk/by-id/wwn-0x644a842029bd3f0031b60f4375d97062", mountpoint = "/var/lib/longhorn-disk1" },
         { device = "/dev/disk/by-id/wwn-0x644a842029bd3f0031b5ffeb8bb8b47f", mountpoint = "/var/lib/longhorn-disk2" },
         { device = "/dev/disk/by-id/wwn-0x644a842029bd3f0031b6000c8dabb266", mountpoint = "/var/lib/longhorn-disk3" },
-        # /var/lib/longhorn-disk4 (wwn-0x6b083fe0c5782700321370dc23fd765b) was
+        { device = "/dev/disk/by-id/wwn-0x6b083fe0c5782700321370dc23fd765b", mountpoint = "/var/lib/longhorn-disk4" },
-        # retired 2026-10-12: the 2TB PERC virtual disk failed with continuous
-        # SCSI I/O errors, hung its XFS filesystem, and wedged Longhorn replica
-        # rebuilds on talos-cp-2 with unkillable D-state processes. Do not
-        # re-add it.
       ]
     zone             = "az-b"
     allow_scheduling = true
@@ -55,7 +49,6 @@ controlplane_configs = {
   "talos-cp-3" = {
     hostname     = "talos-cp-3"
     lan_ip       = "192.168.1.162"
-    public_ip    = "https://k8s-api.riotpiao.com"
     lan_subnet   = "192.168.1.0/24"
     lan_gateway  = "192.168.1.254"
     install_disk = "/dev/nvme0n1"