dubbo如何设置连接zookeeper权限
作者:一屁小肥咩
前言
最近自己的技术栈项目,再升级dubbo为2.7.5,zookeeper为3.5.6,curator-recipes升级为4.2.0的时候一直出现zookeeper not connected和Connection lost for ***的错误。
之前未升级前还是好的...随手查看报错源码信息并百度,终于再stackflow上面找到原因。
设置环境参数ZKClientConfig.ENABLE_CLIENT_SASL_KEY=false,默认未true
System.setProperty(ZKClientConfig.ENABLE_CLIENT_SASL_KEY,Constant.IS_FALSE.toString());
大概意思是zookeeper作为外部应用需要向系统申请资源,申请资源的时候需要通过认证,而sasl是一种认证方式,添加以上那一句来绕过sasl认证。避免等待,来提高效率。
随后继续深进,了解到zookeeper的sasl认证相关(试了下,效果不大好,可能我姿势不大对? 这里就不介绍zk的sasl介绍和相关配置了,有兴趣的可以自行百度),并附加的深入学习了zk的ACL 权限,以及dubbo以zk未注册中心的,权限认证!下面开始相关介绍。
zookeeper设置ACL权限
查阅dubbo
的官方文档dubbo-registry发现连接注册中心的时候是可以选择是否需要用户名密码,接下来就是要如何设置zookeeper的用户名跟密码
进入zookeeper的bin文件夹运行客户端
./zkCli.sh
help 查看指令
[zk: localhost:2181(CONNECTED) 0] help ZooKeeper -server host:port cmd args stat path [watch] set path data [version] ls path [watch] delquota [-n|-b] path ls2 path [watch] setAcl path acl setquota -n|-b val path history redo cmdno printwatches on|off delete path [version] sync path listquota path rmr path get path [watch] create [-s] [-e] path data acl addauth scheme auth quit getAcl path close connect host:port
如果在dubbo中没有指定分组的话,dubbo会默认生成一个分组dubbo,也就是在zookeeper下面会有个子节点dubbo
也可以自己手动创建
create /dubbo
Zookeeper的ACL通过scheme:username:password:permissions
来构成权限
scheme这边主要用到2种方式,另外还有设置ip和host,这几个没用到的这边就先不细说
1.auth方式(密码明文)
添加用户名和密码
addauth digest admin:13871500871
授予/dubbo auth权限
setAcl /dubbo auth:admin:13871500871:rwadc
配置dubbo
连接zookeeper
配置文件
<dubbo:registry protocol ="zookeeper" address="127.0.0.1:2181" username="admin" password="13871500871" client="curator" />
2.digest授权方式(方式跟auth差不多)
授予/dubbo digest权限
addauth digest admin:jI+oJfxCaWyh/3Zw/r+fwhbZVRY=
setAcl /dubbo digest:admin:jI+oJfxCaWyh/3Zw/r+fwhbZVRY=:cdrwa
配置zookeeper配置文件
<dubbo:registry protocol ="zookeeper" address="127.0.0.1:2181" username="admin" password="13871500871" client="curator" />
digest 密码生成方式:把密码进行sha1编码然后对结果进行base64编码
BASE64(SHA1(password))
查看zookeeper源码发现,其实包里面已经有现成的方法,直接调用这个类生成就行,
idPassword字符串格式:username:password
org.apache.zookeeper.server.auth.DigestAuthenticationProvider
static public String generateDigest(String idPassword) throws NoSuchAlgorithmException { String parts[] = idPassword.split(":", 2); byte digest[] = MessageDigest.getInstance("SHA1").digest( idPassword.getBytes()); return parts[0] + ":" + base64Encode(digest); }
还有一个点就是要设置client="curator"
通过ZookeeperRegistry发现zookeeper的连接是通过zookeeperTransporter进行创建,
zookeeperTransporter接口分别由CuratorZookeeperTransporterZkclientZookeeperTransporter实现,这2个分别创建
CuratorZookeeperClient和ZkclientZookeeperClient
public class ZkclientZookeeperTransporter implements ZookeeperTransporter { public ZookeeperClient connect(URL url) { return new ZkclientZookeeperClient(url); } }
public class CuratorZookeeperTransporter implements ZookeeperTransporter { public ZookeeperClient connect(URL url) { return new CuratorZookeeperClient(url); } }
查看源码发现ZkclientZookeeperClient是没有进行设置zookeeper的auth的账号和密码,
CuratorZookeeperClient有去获取配置的相关用户信息。
public ZkclientZookeeperClient(URL url) { super(url); client = new ZkClient(url.getBackupAddress()); client.subscribeStateChanges(new IZkStateListener() { public void handleStateChanged(KeeperState state) throws Exception { ZkclientZookeeperClient.this.state = state; if (state == KeeperState.Disconnected) { stateChanged(StateListener.DISCONNECTED); } else if (state == KeeperState.SyncConnected) { stateChanged(StateListener.CONNECTED); } } public void handleNewSession() throws Exception { stateChanged(StateListener.RECONNECTED); } }); }
public CuratorZookeeperClient(URL url) { super(url); try { Builder builder = CuratorFrameworkFactory.builder() .connectString(url.getBackupAddress()) .retryPolicy(new RetryNTimes(Integer.MAX_VALUE, 1000)) .connectionTimeoutMs(5000); String authority = url.getAuthority(); if (authority != null && authority.length() > 0) { builder = builder.authorization("digest", authority.getBytes()); } client = builder.build(); client.getConnectionStateListenable().addListener(new ConnectionStateListener() { public void stateChanged(CuratorFramework client, ConnectionState state) { if (state == ConnectionState.LOST) { CuratorZookeeperClient.this.stateChanged(StateListener.DISCONNECTED); } else if (state == ConnectionState.CONNECTED) { CuratorZookeeperClient.this.stateChanged(StateListener.CONNECTED); } else if (state == ConnectionState.RECONNECTED) { CuratorZookeeperClient.this.stateChanged(StateListener.RECONNECTED); } } }); client.start(); } catch (IOException e) { throw new IllegalStateException(e.getMessage(), e); } }
cdrwa表示zookeeper的五种权限
CREATE
: 创建子节点READ
: 获取节点数据或者当前节点的子节点列表WRITE
: 节点设置数据DELETE
: 删除子节点ADMIN
: 节点设置权限
如果用户名密码错误,或者没设置,会报KeeperErrorCode = NoAuth错误
注:停止zookeeper,清除zookeeper文件夹下面的logs,或者用delete 删除节点 就可以清除权限
总结
以上为个人经验,希望能给大家一个参考,也希望大家多多支持脚本之家。