我自己想出来的

# Remove nodes that are not running from the cluster

nodes=($(egrep -o '[a-z0-9@-]+' <<< $(sudo rabbitmqctl cluster_status --formatter json | jq .nodes.disc)))
running_nodes=($(egrep -o '[a-z0-9@-]+' <<< $(sudo rabbitmqctl cluster_status --formatter json | jq .running_nodes)))

for node in ${nodes[@]}
do
  match_count=0
  for rnode in ${running_nodes[@]}
  do
    if [ "${node}" == "${rnode}" ]
    then
        match_count=1
        break
    fi
  done
  if [ $match_count == 1 ]
    then
        continue
    else
      sudo rabbitmqctl forget_cluster_node $node
    fi
done

在我的例子中，建议的脚本没有工作，可能是因为RabbitMQ版本输出与我使用的版本（3.9.13）不同。

# !/bin/bash

offline_nodes=$(rabbitmqctl --quiet --formatter json cluster_status \
  | jq -r '.disk_nodes-.running_nodes | .[]')

for node in ${offline_nodes[@]}; do
  rabbitmqctl forget_cluster_node "$node"
done