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クラスタ ポートe0aとe0bが停止し、CLAMパニックが発生する

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環境

  • AFF A300、FAS8200
  • AFF A200、FAS2650、FAS2620
  • AFF A220、AFF C190、FAS2750、FAS2720
  • スイッチレス構成の2ノードクラスタ
  • 次の理由により、接続性、活性度、可用性モニター(CLAM)が有効になります:
    • ONTAP 9.8以降
    • またはSANエンティティで構成されたクラスタ

問題

  • 両方のノードで、クラスタネットワークポート e0a と e0b がほぼ同時にダウンします:

Tue Oct 03 11:08:31 CEST [node1: ixgbe/e0b: snmp.link.down:info]: Interface 2 is down.
Tue Oct 03 11:08:31 CEST [node1: ixgbe/e0b: netif.linkDown:info]: Ethernet e0b: Link down, check cable.
Tue Oct 03 11:08:31 CEST [node1: ixgbe/e0a: snmp.link.down:info]: Interface 1 is down.
Tue Oct 03 11:08:31 CEST [node1: ixgbe/e0a: netif.linkDown:info]: Ethernet e0a: Link down, check cable.

Tue Oct 03 11:08:32 CEST [node2: ixgbe/e0b: snmp.link.down:info]: Interface 2 is down.
Tue Oct 03 11:08:32 CEST [node2: ixgbe/e0b: netif.linkDown:info]: Ethernet e0b: Link down, check cable.
Tue Oct 03 11:08:32 CEST [node2: ixgbe/e0a: snmp.link.down:info]: Interface 1 is down.
Tue Oct 03 11:08:32 CEST [node2: ixgbe/e0a: netif.linkDown:info]: Ethernet e0a: Link down, check cable.

  • いずれかのノードで「クォーラム不足」パニックが発生します:

PANIC  : Received PANIC packet from partner, receiving message is (Coredump and takeover initiated because Connectivity, Liveliness and Availability Monitor (CLAM) has determined this node is out of quorum.

  • テイクオーバーが開始され、データはクラスタを引き継いだノードによって提供される

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