记一次：K8s Zookeeper扩容到3节点时丢数据问题

最新推荐文章于 2025-12-10 14:19:21 发布

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最新推荐文章于 2025-12-10 14:19:21 发布 · 668 阅读

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#kubernetes #zookeeper #容器

1 背景

K8s扩容：从一节点扩容至三节点，运行在其上的zookeeper也需要扩容，从一节点扩容至三节点，增加高可用。

chart包：bitnami zookeeper 13.7.4

2 问题

扩容之前，zookeeper单节点上是有数据的，但是按照如下的扩容方式，将zookeeper扩容至三节点后，之前的旧数据没有了。

$ helm install zk zookeeper-13.7.4.tgz --set persistence.storageClass="local-storage"
$ kubectl exec zk-zookeeper-0 -it -- zkCli.sh
/opt/bitnami/java/bin/java
Connecting to localhost:2181
Welcome to ZooKeeper!
JLine support is enabled

WATCHER::

WatchedEvent state:SyncConnected type:None path:null zxid: -1
[zk: localhost:2181(CONNECTED) 0] ls /
[zookeeper]
[zk: localhost:2181(CONNECTED) 1] create /fured-test mydata
Created /fured-test
[zk: localhost:2181(CONNECTED) 2] get /fured-test
mydata
[zk: localhost:2181(CONNECTED) 3] get /zookeeper/config

[zk: localhost:2181(CONNECTED) 4] quit

$ helm upgrade zk zookeeper-13.7.4.tgz --set persistence.storageClass="local-storage" --set replicaCount=3
$ kubectl exec zk-zookeeper-0 -it -- zkCli.sh
/opt/bitnami/java/bin/java
Connecting to localhost:2181
Welcome to ZooKeeper!
JLine support is enabled

WATCHER::

WatchedEvent state:SyncConnected type:None path:null zxid: -1
[zk: localhost:2181(CONNECTED) 0] ls /
[zookeeper]
[zk: localhost:2181(CONNECTED) 1] get /fured-test   # 数据丢了
Node does not exist: /fured-test
[zk: localhost:2181(CONNECTED) 2] get /fured-test
Node does not exist: /fured-te