docker-swarm集群中删除节点和服务
删除swam节点 如果有的确实想要从swarm集群中删除，你应该先把这个节点容器排空，然后再把节点从集群中去掉。排空节点（其实就是把这个节点上的容器先从其它节点启动，再停掉排空节点上的容器，保证你定义服务的预先状态不受影响）
docker node update --availability drain g36lvv23ypjd8v7ovlst2n3yt
删除指定节点docker node rmnode9docker node rm --force node9
删除服务删除服务以后容器也会删除，注意：容器删除会延迟一定时间。# docker service rm cache_cluster2cache_cluster2
下面操作强烈不建议随意操作
离开swarm集群（离开后发现在manager里面这个节点是down的状态，当然这状态变化是有延时的，因为需要迁移容器）
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# docker swarm leave
Node left the swarm.
# docker node ls
ID HOSTNAME STATUSAVAILABILITYMANAGER STATUS
0jz3o2avbbugyoejzs1ed3djz data-node3Ready Active
2pzv4kzc2p8f7c4wqlfupp9h9 *salt-node1Ready Active Leader
37lpbieigtc2cz6njwqfe0c4b compute1 Ready Active
g36lvv23ypjd8v7ovlst2n3yt salt-node3Ready Active Reachable
h14re9viizbs5yj3zunuo9zo8 salt-node2Ready Active Reachable
nuf5y9ecpeupw2eb0u9z1gt3q data-node2Down Active
强制离开swarm集群docker swarm leave--force
删除服务删除服务以后容器也会删除，注意：容器删除会延迟一定时间。# docker service rm cache_cluster2cache_cluster2
下面做了一个实验，清空一个节点后你会看到这个节点似的状态变为Drain ，容器变为shutdown
查看集群内的容器状态# docker service ps redis3ID NAME IMAGE NODE DESIRED STATECURRENT STATE ERRORPORTSub6zvbeayv1eredis3.1 registry.cn-hangzhou.aliyuncs.com/forker/redis:latestsalt-node3 Running Running 34 minutesago pcgn683xixqn \_ redis3.1 redis:3.0.6 salt-node3Shutdown Shutdown 34 minutes ago y2tpi5kpfz0vredis3.2 registry.cn-hangzhou.aliyuncs.com/forker/redis:latestsalt-node1 Running Running 33 minutesago pmsrkkpsjihp \_ redis3.2 redis:3.0.6 salt-node1Shutdown Shutdown 33 minutes ago w75q4im55w0lredis3.3 registry.cn-hangzhou.aliyuncs.com/forker/redis:latestsalt-node2 Running Running 34 minutesago mc0badk4bk4h \_ redis3.3 redis:3.0.6 salt-node2Shutdown Shutdown 34 minutes ago
排空一个节点
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# docker node update --availability drain g36lvv23ypjd8v7ovlst2n3yt
g36lvv23ypjd8v7ovlst2n3yt
# docker node ls
ID HOSTNAME STATUS AVAILABILITYMANAGER STATUS
2pzv4kzc2p8f7c4wqlfupp9h9 *salt-node1ReadyActive Leader
g36lvv23ypjd8v7ovlst2n3yt salt-node3Ready Drain
h14re9viizbs5yj3zunuo9zo8 salt-node2Ready Active
# docker service ps redis3
ID NAME IMAGE NODE DESIRED STATECURRENT STATE ERRORPORTS
w0jjjrdr25ehredis3.1 registry.cn-hangzhou.aliyuncs.com/forker/redis:latestsalt-node1
Running Running 30 seconds
ago
ub6zvbeayv1e \_ redis3.1 registry.cn-hangzhou.aliyuncs.com/forker/redis:latestsalt-node3
Shutdown Shutdown 34 seconds
ago
pcgn683xixqn \_ redis3.1 redis:3.0.6
salt-node3Shutdown Shutdown 11 hours ago
y2tpi5kpfz0vredis3.2
registry.cn-hangzhou.aliyuncs.com/forker/redis:latestsalt-node1
Running Running 11 hours
ago
pmsrkkpsjihp \_ redis3.2 redis:3.0.6
salt-node1Shutdown Shutdown 11 hours ago
w75q4im55w0lredis3.3 registry.cn-hangzhou.aliyuncs.com/forker/redis:latestsalt-node2
Running Running 11 hours
ago
mc0badk4bk4h \_ redis3.3 redis:3.0.6 salt-node2Shutdown Shutdown 11 hours ago
#恢复active一个节点
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# docker node update --availability Active g36lvv23ypjd8v7ovlst2n3yt
g36lvv23ypjd8v7ovlst2n3yt
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