Zookeeper ACL

 # 1.给已有节点赋予权限
 setAcl path acl
 
 # 2.在创建节点时候指定权限
 create [-s] [-e] path data acl

getAcl path

# 格式
addauth scheme auth 

#示例：添加用户名为heibai,密码为root的用户认证信息
addauth digest heibai:root 

[zk: localhost:2181(CONNECTED) 32] create /hadoop 123
Created /hadoop
[zk: localhost:2181(CONNECTED) 33] getAcl /hadoop
'world,'anyone    #默认的权限
: cdrwa
[zk: localhost:2181(CONNECTED) 34] setAcl /hadoop world:anyone:cwda   # 修改节点，不允许所有客户端读
....
[zk: localhost:2181(CONNECTED) 35] get /hadoop
Authentication is not valid : /hadoop     # 权限不足

[zk: localhost:2181(CONNECTED) 36] addauth digest heibai:heibai  # 登录
[zk: localhost:2181(CONNECTED) 37] setAcl /hadoop auth::cdrwa    # 设置权限
[zk: localhost:2181(CONNECTED) 38] getAcl /hadoop                # 获取权限
'digest,'heibai:sCxtVJ1gPG8UW/jzFHR0A1ZKY5s=   #用户名和密码 (密码经过加密处理)，注意返回的权限类型是 digest
: cdrwa

#用户名和密码都是使用登录的用户名和密码，即使你在创建权限时候进行指定也是无效的
[zk: localhost:2181(CONNECTED) 39] setAcl /hadoop auth:root:root:cdrwa    #指定用户名和密码为 root
[zk: localhost:2181(CONNECTED) 40] getAcl /hadoop
'digest,'heibai:sCxtVJ1gPG8UW/jzFHR0A1ZKY5s=  #无效，使用的用户名和密码依然还是 heibai
: cdrwa

[zk:44] create /spark "spark" digest:heibai:sCxtVJ1gPG8UW/jzFHR0A1ZKY5s=:cdrwa  #指定用户名和加密后的密码
[zk:45] getAcl /spark  #获取权限
'digest,'heibai:sCxtVJ1gPG8UW/jzFHR0A1ZKY5s=   # 返回的权限类型是 digest
: cdrwa

[zk: localhost:2181(CONNECTED) 46] create  /hive "hive" ip:192.168.0.108:cdrwa  
[zk: localhost:2181(CONNECTED) 47] get /hive
Authentication is not valid : /hive  # 当前主机已经不能访问

"-Dzookeeper.DigestAuthenticationProvider.superDigest=heibai:sCxtVJ1gPG8UW/jzFHR0A1ZKY5s=" 

[zk: localhost:2181(CONNECTED) 0] get /hive  #访问受限
Authentication is not valid : /hive
[zk: localhost:2181(CONNECTED) 1] addauth digest heibai:heibai  # 登录 (添加认证信息)
[zk: localhost:2181(CONNECTED) 2] get /hive  #成功访问
hive
cZxid = 0x158
ctime = Sat May 25 09:11:29 CST 2019
mZxid = 0x158
mtime = Sat May 25 09:11:29 CST 2019
pZxid = 0x158
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 4
numChildren = 0

<dependencies>
    <!--Apache Curator 相关依赖-->
    <dependency>
        <groupId>org.apache.curator</groupId>
        <artifactId>curator-framework</artifactId>
        <version>4.0.0</version>
    </dependency>
    <dependency>
        <groupId>org.apache.curator</groupId>
        <artifactId>curator-recipes</artifactId>
        <version>4.0.0</version>
    </dependency>
    <dependency>
        <groupId>org.apache.zookeeper</groupId>
        <artifactId>zookeeper</artifactId>
        <version>3.4.13</version>
    </dependency>
    <!--单元测试相关依赖-->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
    </dependency>
</dependencies>

public class AclOperation {

    private CuratorFramework client = null;
    private static final String zkServerPath = "192.168.0.226:2181";
    private static final String nodePath = "/hadoop/hdfs";

    @Before
    public void prepare() {
        RetryPolicy retryPolicy = new RetryNTimes(3, 5000);
        client = CuratorFrameworkFactory.builder()
                .authorization("digest", "heibai:123456".getBytes()) //等价于 addauth 命令
                .connectString(zkServerPath)
                .sessionTimeoutMs(10000).retryPolicy(retryPolicy)
                .namespace("workspace").build();
        client.start();
    }

    /**
     * 新建节点并赋予权限
     */
    @Test
    public void createNodesWithAcl() throws Exception {
        List<ACL> aclList = new ArrayList<>();
        // 对密码进行加密
        String digest1 = DigestAuthenticationProvider.generateDigest("heibai:123456");
        String digest2 = DigestAuthenticationProvider.generateDigest("ying:123456");
        Id user01 = new Id("digest", digest1);
        Id user02 = new Id("digest", digest2);
        // 指定所有权限
        aclList.add(new ACL(Perms.ALL, user01));
        // 如果想要指定权限的组合，中间需要使用 | ,这里的|代表的是位运算中的 按位或
        aclList.add(new ACL(Perms.DELETE | Perms.CREATE, user02));

        // 创建节点
        byte[] data = "abc".getBytes();
        client.create().creatingParentsIfNeeded()
                .withMode(CreateMode.PERSISTENT)
                .withACL(aclList, true)
                .forPath(nodePath, data);
    }


    /**
     * 给已有节点设置权限,注意这会删除所有原来节点上已有的权限设置
     */
    @Test
    public void SetAcl() throws Exception {
        String digest = DigestAuthenticationProvider.generateDigest("admin:admin");
        Id user = new Id("digest", digest);
        client.setACL()
                .withACL(Collections.singletonList(new ACL(Perms.READ | Perms.DELETE, user)))
                .forPath(nodePath);
    }

    /**
     * 获取权限
     */
    @Test
    public void getAcl() throws Exception {
        List<ACL> aclList = client.getACL().forPath(nodePath);
        ACL acl = aclList.get(0);
        System.out.println(acl.getId().getId() 
                           + "是否有删读权限:" + (acl.getPerms() == (Perms.READ | Perms.DELETE)));
    }

    @After
    public void destroy() {
        if (client != null) {
            client.close();
        }
    }
}