134 lines
3.7 KiB
YAML
134 lines
3.7 KiB
YAML
# services/mailu/mailbox-watchdog.yaml
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---
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apiVersion: v1
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kind: ServiceAccount
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metadata:
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name: mailu-mailbox-watchdog
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namespace: mailu-mailserver
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: Role
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metadata:
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name: mailu-mailbox-watchdog
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namespace: mailu-mailserver
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rules:
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- apiGroups: [""]
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resources: ["pods"]
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verbs: ["get", "list", "delete"]
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- apiGroups: [""]
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resources: ["pods/exec"]
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verbs: ["create"]
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: RoleBinding
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metadata:
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name: mailu-mailbox-watchdog
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namespace: mailu-mailserver
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roleRef:
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apiGroup: rbac.authorization.k8s.io
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kind: Role
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name: mailu-mailbox-watchdog
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subjects:
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- kind: ServiceAccount
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name: mailu-mailbox-watchdog
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namespace: mailu-mailserver
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---
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: mailu-mailbox-watchdog
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namespace: mailu-mailserver
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spec:
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replicas: 1
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selector:
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matchLabels:
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app: mailu-mailbox-watchdog
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template:
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metadata:
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labels:
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app: mailu-mailbox-watchdog
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spec:
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serviceAccountName: mailu-mailbox-watchdog
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automountServiceAccountToken: true
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nodeSelector:
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hardware: rpi5
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node-role.kubernetes.io/worker: "true"
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containers:
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- name: watchdog
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image: registry.bstein.dev/bstein/kubectl:1.35.0
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imagePullPolicy: IfNotPresent
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command: ["/bin/sh", "-ec"]
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env:
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- name: HOME
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value: /tmp
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args:
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- |
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failures=0
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last_pod=""
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sleep 60
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while true; do
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pod="$(kubectl get pods \
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-l app.kubernetes.io/component=dovecot,app.kubernetes.io/instance=mailu \
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--field-selector=status.phase=Running \
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-o jsonpath='{.items[0].metadata.name}' 2>/dev/null || true)"
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if [ -z "${pod}" ]; then
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failures=0
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last_pod=""
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sleep 30
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continue
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fi
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if [ "${pod}" != "${last_pod}" ]; then
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failures=0
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last_pod="${pod}"
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echo "watching ${pod}; allowing startup grace"
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sleep 60
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continue
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fi
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if timeout 15s kubectl exec "${pod}" -c dovecot -- \
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doveadm mailbox status -u brad@bstein.dev uidnext INBOX >/dev/null 2>&1; then
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if [ "${failures}" -gt 0 ]; then
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echo "mailbox health recovered after ${failures} failed checks"
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fi
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failures=0
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else
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failures=$((failures + 1))
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echo "mailbox health check failed (${failures}/4) for ${pod}" >&2
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fi
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if [ "${failures}" -ge 4 ]; then
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echo "recreating ${pod} to remount mailbox storage after persistent failures" >&2
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kubectl delete pod "${pod}" --wait=false
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failures=0
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last_pod=""
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sleep 180
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continue
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fi
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sleep 30
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done
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resources:
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requests:
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cpu: 10m
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memory: 32Mi
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limits:
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cpu: 100m
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memory: 128Mi
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securityContext:
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allowPrivilegeEscalation: false
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capabilities:
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drop: ["ALL"]
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readOnlyRootFilesystem: true
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runAsNonRoot: true
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runAsUser: 65532
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volumeMounts:
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- name: tmp
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mountPath: /tmp
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imagePullSecrets:
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- name: harbor-regcred
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volumes:
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- name: tmp
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emptyDir: {}
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