58 lines
1.9 KiB
YAML
58 lines
1.9 KiB
YAML
# One-off: copy ClickHouse data from the old NFS PVC to serber:/srv/monitoring-db.
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# NOT applied by `kubectl apply -f k8s/` (subdirectory). Run it while the
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# StatefulSet is scaled to 0 so the copy is consistent:
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#
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# kubectl scale sts clickhouse -n monitoring --replicas=0
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# kubectl apply -f k8s/migrate/clickhouse-nfs-to-local.yaml
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# kubectl wait --for=condition=complete job/clickhouse-nfs-to-local -n monitoring --timeout=30m
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# kubectl delete sts clickhouse -n monitoring # PVC is retained (rollback copy)
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# kubectl apply -f k8s/clickhouse.yaml # new hostPath StatefulSet
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# kubectl delete job clickhouse-nfs-to-local -n monitoring
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#
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# The old PVC (data-clickhouse-0) is left untouched until you delete it.
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apiVersion: batch/v1
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kind: Job
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metadata:
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name: clickhouse-nfs-to-local
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namespace: monitoring
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spec:
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backoffLimit: 0
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template:
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spec:
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restartPolicy: Never
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nodeSelector:
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kubernetes.io/hostname: serber
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containers:
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- name: copy
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image: busybox:1.36
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securityContext:
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runAsUser: 0
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command:
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- sh
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- -c
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- |
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set -eu
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if [ -n "$(ls -A /new 2>/dev/null)" ]; then
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echo "refusing to copy: /new (serber:/srv/monitoring-db) is not empty"; exit 1
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fi
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du -sh /old
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cp -a /old/. /new/
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chown -R 101:101 /new
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echo "old: $(find /old -type f | wc -l) files, new: $(find /new -type f | wc -l) files"
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[ "$(find /old -type f | wc -l)" = "$(find /new -type f | wc -l)" ]
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volumeMounts:
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- name: old
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mountPath: /old
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readOnly: true
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- name: new
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mountPath: /new
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volumes:
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- name: old
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persistentVolumeClaim:
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claimName: data-clickhouse-0
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readOnly: true
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- name: new
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hostPath:
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path: /srv/monitoring-db
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type: DirectoryOrCreate
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