docker swarm auto rebalance

由于服务器宕机后强制 rebalance

#!/bin/bash
for service in `sudo docker service ls | awk '($2 != "viz" && $2 != "NAME") { print $1 }'`; do
            sudo docker service update --force  ${service}
            echo "service ${service} will be rebalanced"
done

rebalance 服务，让服务实例落在不同机器

#! /bin/bash
for service in `sudo docker service ls | awk '($2 != "viz" && $2 != "NAME") { print $1 }'`; do
    sudo docker service ps ${service} | awk '($5 == "Running") { print $4 }' > container-nodes.txt
    container_node_count=`cat container-nodes.txt | sort | uniq | wc -l`
    container_count=`cat container-nodes.txt | wc -l`
    if [ $container_count -gt $container_node_count ]
    then
        available_node_count=`sudo docker node ls | awk '($3 == "Ready" || $2 == "*" && $4 == "Ready") { print $1 }' | wc -l`
        if [ $available_node_count -gt $container_node_count ]
        then
            replicas="`sudo docker service inspect ${service} --pretty | grep Replicas | awk '{ print $NF }'`"
            # Note: replicas should equal container_count, right?
            echo "service ${service} needs to be rebalanced to ${replicas} replicas"

            # Rebalance the containers by first scaling down, then up
            sudo docker service scale ${service}=${container_node_count}
            sudo docker service scale ${service}=${replicas}
	else
	    echo "service ${service} can be rebalanced when adding a node"
        fi
    else
        echo "service ${service} does not need to be rebalanced"
    fi
done