Which action allows Docker daemon persistence during switchover on the Cisco Nexus 9500 Series Switches running Cisco NX-OS?

Question

Options

• AChange the Docker configuration to include the live restore option.
• BCopy the dockerpart file manually to the standby supervisor after performing the switchover.
• CCopy the dockerpart file manually to the standby supervisor before performing the switchover.
• DThe system takes automatic action.

• A
  72% (18)
• B
  4% (1)
• C
  8% (2)
• D
  16% (4)

Explanation

Enabling Docker's live restore option ("live-restore": true in /etc/docker/daemon.json) instructs the Docker daemon to keep containers running even when the daemon itself stops or restarts - which is precisely what happens during a Cisco NX-OS supervisor switchover. Without this setting, a daemon restart kills all running containers, causing an outage.

Why the distractors are wrong:

• B & C - Manually copying a dockerpart file is not a supported or recognized mechanism for Docker persistence on NX-OS. Doing it after switchover (B) is also logically too late, since the switchover has already completed.
• D - NX-OS does not automatically handle Docker container persistence during switchover; it requires deliberate daemon configuration by the administrator.

Memory tip: Associate the word "live" in live-restore with "live through the switchover" - the option literally keeps Docker alive when the daemon bounces, which is the exact event a supervisor failover triggers.

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