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Ceph 노드 재시작하기

노드 한 대 재시작​

for _option in noout; do
    kubectl rook-ceph ceph osd set ${_option}
done
kubectl cordon <node>
kubectl drain <node> --ignore-daemonsets --delete-emptydir-data

해당 노드에 접속하거나 IPMI 등을 통해 노드를 재시작합니다.

kubectl uncordon <node>
for _option in noout; do
    kubectl rook-ceph ceph osd unset ${_option}
done

전체 노드 재시작​

References

스토리지를 사용하는 모든 서비스 scale down​

Ceph OSD 설정​

for _option in noout nodown norebalance nobackfill norecover pause; do
    kubectl rook-ceph ceph osd set ${_option}
done

노드 재시작 전에 ceph이 OSD 상태를 체크하거나 복구하려는 시도를 위의 명령어로 막아야합니다.

Rook 컴포넌트 scale down​

  1. Rook Operator
  2. CephFS plugin provisioner
  3. RBD plugin provisioner
  4. OSD
  5. MON
  6. MGR
  7. Etc.
kubectl -n rook-ceph scale deployment rook-ceph-operator --replicas=0
for _category in rook-ceph-rgw csi-cephfsplugin-provisioner csi-rbdplugin-provisioner rook-ceph-osd rook-ceph-mon rook-ceph-mgr rook-ceph-exporter rook-ceph-crashcollector; do
    for _item in $(kubectl get deployment -n rook-ceph | awk '/^'"${_category}"'/{print $1}'); do
        kubectl -n rook-ceph scale deployment ${_item} --replicas=0;
        while [[ $(kubectl get deployment -n rook-ceph ${_item} -o jsonpath='{.status.readyReplicas}') != "" ]]; do
            sleep 5;
        done;
    done;
done

노드 정비/재시작​

Rook 컴포넌트 scale up​

  1. MON
  2. OSD, MGR
  3. Etc.
  4. Rook Operator
for _item in $(kubectl get deployment -n rook-ceph | awk '/^rook-ceph-mon/{print $1}'); do
    kubectl -n rook-ceph scale deployment ${_item} --replicas=1;
    while [[ $(kubectl get deployment -n rook-ceph ${_item} -o jsonpath='{.status.replicas}') != "1" ]]; do
        sleep 5;
    done;
done
for _category in rook-ceph-mgr rook-ceph-osd; do
    for _item in $(kubectl get deployment -n rook-ceph | awk '/^'"${_category}"'/{print $1}'); do
        kubectl -n rook-ceph scale deployment ${_item} --replicas=1;
        while [[ $(kubectl get deployment -n rook-ceph ${_item} -o jsonpath='{.status.replicas}') != "1" ]]; do
            sleep 5;
        done;
    done;
done
for _category in rook-ceph-exporter rook-ceph-crashcollector; do
    for _item in $(kubectl get deployment -n rook-ceph | awk '/^'"${_category}"'/{print $1}'); do
        kubectl -n rook-ceph scale deployment ${_item} --replicas=1;
        while [[ $(kubectl get deployment -n rook-ceph ${_item} -o jsonpath='{.status.replicas}') != "1" ]]; do
            sleep 5;
        done;
    done;
done
kubectl -n rook-ceph scale deployment rook-ceph-operator --replicas=1

Operator가 실행되면 자동으로 컴포넌트들을 복구합니다.

Ceph OSD 설정​

for _option in noout nodown norebalance nobackfill norecover pause; do
    kubectl rook-ceph ceph osd unset ${_option}
done

재시작 후 k8s 상태를 확인합니다. 문제가 없으면 재시작 전에 set했던 플래그들을 모두 unset 명령어로 해제합니다.