zookeeper安装配置

1、下载安装

1、下载
下载地址：https://www.apache.org/dyn/closer.cgi/zookeeper/
执行命令下载：wget http://mirror.bit.edu.cn/apache/zookeeper/zookeeper-3.5.6/apache-zookeeper-3.5.6-bin.tar.gz
2、安装
解压：tar -zxvf apache-zookeeper-3.5.6-bin.tar.gz
copy到目录：cp -R apache-zookeeper-3.5.6-bin /zjl/program/
创建软链接：ln -s apache-zookeeper-3.5.6-bin/ /zjl/program/zookeeper

2、单机配置

1、配置
conf目录下提供了配置的样例zoo_sample.cfg，要将zk运行起来，需要将其名称修改为zoo.cfg。
打开zoo.cfg，可以看到默认的一些配置
tickTime时长单位为毫秒，为zk使用的基本时间度量单位。例如，1 * tickTime是客户端与zk服务端的心跳时间，2 * tickTime是客户端会话的超时时间。
tickTime的默认值为2000毫秒，更低的tickTime值可以更快地发现超时问题，但也会导致更高的网络流量（心跳消息）和更高的CPU使用率（会话的跟踪处理）。
clientPortzk服务进程监听的TCP端口，默认情况下，服务端会监听2181端口。
dataDir无默认配置，必须配置，用于配置存储快照文件的目录。如果没有配置dataLogDir，那么事务日志也会存储在此目录。
2、启动
命令：./zkServer.sh start 这个命令使得zk服务进程在后台进行。
命令：./zkServer.sh start-foreground 执行此命令，可以看到大量详细信息的输出，以便允许查看服务器发生了什么。
使用文本编辑器打开zkServer.cmd或者zkServer.sh文件，可以看到其会调用zkEnv.cmd或者zkEnv.sh脚本。zkEnv脚本的作用是设置zk运行的一些环境变量，例如配置文件的位置和名称等。
3、连接
如果是连接同一台主机上的zk进程，那么直接运行bin/目录下的zkCli.cmd（Windows环境下）或者zkCli.sh（Linux环境下），即可连接上zk。
直接执行zkCli.cmd或者zkCli.sh命令默认以主机号 127.0.0.1，端口号 2181 来连接zk，
如果要连接不同机器上的zk，可以使用 -server 参数，例如：bin/zkCli.sh -server 192.168.0.1:2181

3、集群配置

1、配置
initLimit：ZooKeeper集群模式下包含多个zk进程，其中一个进程为leader，余下的进程为follower。当follower最初与leader建立连接时，它们之间会传输相当多的数据，尤其是follower的数据落后leader很多。initLimit配置follower与leader之间建立连接后进行同步的最长时间。
syncLimit：配置follower和leader之间发送消息，请求和应答的最大时间长度。
tickTime：tickTime则是上述两个超时配置的基本单位，例如对于initLimit，其配置值为5，说明其超时时间为 2000ms * 5 = 10秒。
server.id=host:port1:port2：其中id为一个数字，表示zk进程的id，这个id也是dataDir目录下myid文件的内容。host是该zk进程所在的IP地址，port1表示follower和leader交换消息所使用的端口，port2表示选举leader所使用的端口。
dataDir：其配置的含义跟单机模式下的含义类似，不同的是集群模式下还有一个myid文件。myid文件的内容只有一行，且内容只能为1 - 255之间的数字，这个数字亦即上面介绍server.id中的id，表示zk进程的id。
例子：
tickTime=2000
dataDir=/zjl/program/zookeeper/data
clientPort=2181
initLimit=5
syncLimit=2
server.1=192.168.244.128:2888:3888
server.2=192.168.244.130:2888:3888
server.3=192.168.244.131:2888:3888
注意：在三台机器dataDir目录（/zjl/program/zookeeper/data）下，分别生成一个myid文件，其内容分别为1，2，3。
命令：touch myid
2、启动
如单机启动，只是要分别在这三台机器上启动zk进程，这样我们便将zk集群启动了起来。
3、连接
可以使用以下命令来连接一个zk集群：
./zkCli.sh -server 192.168.244.128:2181,192.168.244.130:2181,192.168.244.131:2181
成功连接后，可以看到如下输出：
从日志输出可以看到，客户端连接的是192.168.244.128:2181进程（连接上哪台机器的zk进程是随机的），客户端已成功连接上zk集群。

4、zookeeper指令

连接成功后，便可以使用命令与zk服务进行交互。
1、help
help命令会输出zk支持的所有命令。
[zk: 127.0.0.1:2182(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
2、ls
查看命令(niocoder是我测试集群创建的节点，默认只有zookeeper一个节点)
[zk: localhost:2181(CONNECTED) 1] ls /
[niocoder, zookeeper]
[zk: localhost:2181(CONNECTED) 2] ls /zookeeper
[quota]
[zk: localhost:2181(CONNECTED) 4] ls /zookeeper/quota
[]
3、create
创建一个节点，例如：
[zk: localhost:2181(CONNECTED) 3] create /zk mydata
Created /zk
以上命令创建一个/zk节点，且其内容为 “myData”
4、get
显示指定路径下节点的信息，例如，我们检查一下上面的/zk节点最否创建成功
[zk: localhost:2181(CONNECTED) 4] get /zk
mydata
cZxid = 0xb59
ctime = Thu Jun 30 11:13:24 CST 2016
mZxid = 0xb59
mtime = Thu Jun 30 11:13:24 CST 2016
pZxid = 0xb59
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 6
numChildren = 0
可以看到/zk节点的内容为”myData”，且输出包含了znode的其他信息。有关各个字段的具体含义，请参见了本博客对znode的介绍。
5、set
设置节点的内容，例如：
[zk: localhost:2181(CONNECTED) 6] set /zk "anotherData"
……
[zk: localhost:2181(CONNECTED) 7] get /zk
"anotherData"
……
6、delete
删除一个节点，例如：
[zk: localhost:2181(CONNECTED) 8] delete /zk
[zk: localhost:2181(CONNECTED) 9] get /zk
Node does not exist: /zk
以上就是zk客户端最常用的几个命令，从这几个命令我们也可以看到zk提供的API设计的简单。
7、四字母命令
ZooKeeper提供了多个由4个字母构成的命令，可以使用nc或者telnet来使用这些命令。例如：
telnet 127.0.0.1 2181
成功连接zk后，输入conf
会看到以下输出
clientPort=2181
dataDir=D:\Soft\zookeeper-3.4.6\data\version-2
dataLogDir=D:\Soft\zookeeper-3.4.6\data\version-2
tickTime=2000
maxClientCnxns=60
minSessionTimeout=4000
maxSessionTimeout=40000
serverId=0
或者使用nc来向zk发送4字母命令，例如：
echo conf | nc 192.168.229.161 2181
其他常用的四字母命令如下表格所示：
表格：ZooKeeper提供的四字母命令
例如，mntr 命令的输出：
echo mntr | nc 192.168.229.161 2181
zk_version  3.4.6-1569965, built on 02/20/2014 09:09 GMT
zk_avg_latency  0
zk_max_latency  565
zk_min_latency  0
zk_packets_received 95353
zk_packets_sent 95713
zk_num_alive_connections    3
zk_outstanding_requests 0
zk_server_state leader
zk_znode_count  20
zk_watch_count  12
zk_ephemerals_count 9
zk_approximate_data_size    1465
zk_open_file_descriptor_count   37
zk_max_file_descriptor_count    65535
zk_followers    2       - 只有leader进程才有此项输出
zk_synced_followers 2   - 只有leader进程才有此项输出
zk_pending_syncs    0   - 只有leader进程才有此项输出

5、zookeeper指令2

1、普通操作

启动zk服务： /zkServer.sh start

[root@localhost bin]# ./zkServer.sh
ZooKeeper JMX enabled by default
Using config: /usr/home/zookeeper-3.4.11/bin/../conf/zoo.cfg
Usage: ./zkServer.sh {start|start-foreground|stop|restart|status|upgrade|print-cmd}
# 提示要以./zkCli.sh start 启动zk
./zkCli.sh start

查看zk的运行状态：./zkServer.sh status 由于我已经配置了zk的集群，所以此处显示状态为leader

[root@localhost bin]# ./zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /usr/home/zookeeper-3.4.11/bin/../conf/zoo.cfg
Mode: leader

客户端链接zk

[root@localhost bin]# ./zkCli.sh 
......
WatchedEvent state:SyncConnected type:None path:null
[zk: localhost:2181(CONNECTED) 0]

help 查看客户端帮助命令：help

[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
[zk: localhost:2181(CONNECTED) 1]

ls 查看：ls 查看命令(niocoder是我测试集群创建的节点，默认只有zookeeper一个节点)

[zk: localhost:2181(CONNECTED) 1] ls /
[niocoder, zookeeper]
[zk: localhost:2181(CONNECTED) 2] ls /zookeeper
[quota]
[zk: localhost:2181(CONNECTED) 4] ls /zookeeper/quota
[]

get 获取节点数据和更新信息：

get内容为空
cZxid ：创建节点的id
ctime ：节点的创建时间
mZxid ：修改节点的id
mtime ：修改节点的时间
pZxid ：子节点的id
cversion : 子节点的版本
dataVersion ：当前节点数据的版本
aclVersion ：权限的版本
ephemeralOwner ：判断是否是临时节点
dataLength ：数据的长度
numChildren ：子节点的数量

[zk: localhost:2181(CONNECTED) 7] get /zookeeper #下面空行说明节点内容为空

cZxid = 0x0
ctime = Thu Jan 01 00:00:00 UTC 1970
mZxid = 0x0
mtime = Thu Jan 01 00:00:00 UTC 1970
pZxid = 0x0
cversion = -1
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 0
numChildren = 1
[zk: localhost:2181(CONNECTED) 8]

获得节点的更新信息：stat

[zk: localhost:2181(CONNECTED) 8] stat /zookeeper
cZxid = 0x0
ctime = Thu Jan 01 00:00:00 UTC 1970
mZxid = 0x0
mtime = Thu Jan 01 00:00:00 UTC 1970
pZxid = 0x0
cversion = -1
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 0
numChildren = 1

ls命令和stat命令的整合：ls2

[zk: localhost:2181(CONNECTED) 10] ls2 /zookeeper
[quota]
cZxid = 0x0
ctime = Thu Jan 01 00:00:00 UTC 1970
mZxid = 0x0
mtime = Thu Jan 01 00:00:00 UTC 1970
pZxid = 0x0
cversion = -1
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 0
numChildren = 1
[zk: localhost:2181(CONNECTED) 11]

create 创建节点：create [-s] [-e] path data acl 可以注意一下各个版本的变化

#创建merryyou节点，节点的内容为merryyou
[zk: localhost:2181(CONNECTED) 1] create /merryyou merryyou
Created /merryyou
#获得merryyou节点内容
[zk: localhost:2181(CONNECTED) 3] get /merryyou
merryyou
cZxid = 0x200000004
ctime = Sat Jun 02 14:20:06 UTC 2018
mZxid = 0x200000004
mtime = Sat Jun 02 14:20:06 UTC 2018
pZxid = 0x200000004
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 8
numChildren = 0

create -e 创建临时节点：create -e

#创建临时节点
[zk: localhost:2181(CONNECTED) 4] create -e  /merryyou/temp merryyou
Created /merryyou/temp
[zk: localhost:2181(CONNECTED) 5] get /merryyou
merryyou
cZxid = 0x200000004
ctime = Sat Jun 02 14:20:06 UTC 2018
mZxid = 0x200000004
mtime = Sat Jun 02 14:20:06 UTC 2018
pZxid = 0x200000005
cversion = 1
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 8
numChildren = 1
[zk: localhost:2181(CONNECTED) 6] get /merryyou/temp
merryyou
cZxid = 0x200000005
ctime = Sat Jun 02 14:22:24 UTC 2018
mZxid = 0x200000005
mtime = Sat Jun 02 14:22:24 UTC 2018
pZxid = 0x200000005
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x2000000d4500000
dataLength = 8
numChildren = 0
[zk: localhost:2181(CONNECTED) 7]
#断开重连之后，临时节点自动消失
WATCHER::

WatchedEvent state:SyncConnected type:None path:null
#因为默认的心跳机制，此时查询临时节点还存在
[zk: localhost:2181(CONNECTED) 0] ls /merryyou
[temp]
#再次查询，临时节点消失
[zk: localhost:2181(CONNECTED) 1] ls /merryyou
[]
[zk: localhost:2181(CONNECTED) 2]

创建顺序节点自动累加：create -s

# 创建顺序节点，顺序节点会自动累加
[zk: localhost:2181(CONNECTED) 2] create -s /merryyou/sec seq
Created /merryyou/sec0000000001
[zk: localhost:2181(CONNECTED) 3] create -s /merryyou/sec seq
Created /merryyou/sec0000000002

修改节点：set path data [version]

[zk: localhost:2181(CONNECTED) 6] get /merryyou
merryyou
cZxid = 0x200000004
ctime = Sat Jun 02 14:20:06 UTC 2018
mZxid = 0x200000004
mtime = Sat Jun 02 14:20:06 UTC 2018
pZxid = 0x200000009
cversion = 4
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 8
numChildren = 2
# 修改节点内容为new-merryyou
[zk: localhost:2181(CONNECTED) 7] set /merryyou new-merryyou
cZxid = 0x200000004
ctime = Sat Jun 02 14:20:06 UTC 2018
mZxid = 0x20000000a
mtime = Sat Jun 02 14:29:23 UTC 2018
pZxid = 0x200000009
cversion = 4
dataVersion = 1
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 12
numChildren = 2
#再次查询，节点内容已经修改
[zk: localhost:2181(CONNECTED) 8] get /merryyou
new-merryyou
cZxid = 0x200000004
ctime = Sat Jun 02 14:20:06 UTC 2018
mZxid = 0x20000000a
mtime = Sat Jun 02 14:29:23 UTC 2018
pZxid = 0x200000009
cversion = 4
dataVersion = 1
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 12
numChildren = 2
#set 根据版本号更新 dataVersion 乐观锁
[zk: localhost:2181(CONNECTED) 9] set /merryyou test-merryyou 1
cZxid = 0x200000004
ctime = Sat Jun 02 14:20:06 UTC 2018
mZxid = 0x20000000b
mtime = Sat Jun 02 14:31:30 UTC 2018
pZxid = 0x200000009
cversion = 4
dataVersion = 2
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 13
numChildren = 2
#因为数据的版本号已经修改为2 再次使用版本号1修改节点提交错误
[zk: localhost:2181(CONNECTED) 10] set /merryyou test-merryyou 1
version No is not valid : /merryyou

删除节点：delete path [version]

[zk: localhost:2181(CONNECTED) 13] delete /merryyou/sec000000000

sec0000000001   sec0000000002
[zk: localhost:2181(CONNECTED) 13] delete /merryyou/sec0000000001
[zk: localhost:2181(CONNECTED) 14] ls /merryyou
[sec0000000002]
[zk: localhost:2181(CONNECTED) 15]

2、watcher通知机制

参考https://blog.csdn.net/hohoo1990/article/details/78617336

关于watcher机制大体的理解可以为，当每个节点发生变化，都会触发watcher事件，类似于mysql的触发器。zk中 watcher是一次性的，触发后立即销毁。
- stat path [watch] 设置watch事件
- get path [watch]设置watch事件
- 子节点创建和删除时触发watch事件，子节点修改不会触发该事件

设置watch事件：stat path [watch]

#添加watch 事件
[zk: localhost:2181(CONNECTED) 18] stat /longfei watch
Node does not exist: /longfei
#创建longfei节点时触发watcher事件
[zk: localhost:2181(CONNECTED) 19] create /longfei test

WATCHER::

WatchedEvent state:SyncConnected type:NodeCreated path:/longfei
Created /longfei

设置watch事件：get path [watch]

#使用get命令添加watch事件
[zk: localhost:2181(CONNECTED) 20] get /longfei watch
test
cZxid = 0x20000000e
ctime = Sat Jun 02 14:43:15 UTC 2018
mZxid = 0x20000000e
mtime = Sat Jun 02 14:43:15 UTC 2018
pZxid = 0x20000000e
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 4
numChildren = 0
#修改节点触发watcher事件
[zk: localhost:2181(CONNECTED) 21] set /longfei new_test

WATCHER::

WatchedEvent state:SyncConnected type:NodeDataChanged path:/longfei
cZxid = 0x20000000e
ctime = Sat Jun 02 14:43:15 UTC 2018
mZxid = 0x20000000f
mtime = Sat Jun 02 14:45:06 UTC 2018
pZxid = 0x20000000e
cversion = 0
dataVersion = 1
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 8
numChildren = 0
[zk: localhost:2181(CONNECTED) 22]
#删除触发watcher事件
[zk: localhost:2181(CONNECTED) 23] get /longfei watch
new_test
cZxid = 0x20000000e
ctime = Sat Jun 02 14:43:15 UTC 2018
mZxid = 0x20000000f
mtime = Sat Jun 02 14:45:06 UTC 2018
pZxid = 0x20000000e
cversion = 0
dataVersion = 1
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 8
numChildren = 0
[zk: localhost:2181(CONNECTED) 24] delete /longfei

WATCHER::

WatchedEvent state:SyncConnected type:NodeDeleted path:/longfei
[zk: localhost:2181(CONNECTED) 25]

3、ACL权限控制

ZK的节点有5种操作权限：CREATE、READ、WRITE、DELETE、ADMIN 也就是增、删、改、查、管理权限，这5种权限简写为crwda(即：每个单词的首字符缩写)。
注：这5种权限中，delete是指对子节点的删除权限，其它4种权限指对自身节点的操作权限

身份的认证有4种方式：
- world：默认方式，相当于全世界都能访问
- auth：代表已经认证通过的用户(cli中可以通过addauth digest user:pwd 来添加当前上下文中的授权用户)
- digest：即用户名:密码这种方式认证，这也是业务系统中最常用的
- ip：使用Ip地址认证

使用[scheme:id:permissions]来表示acl权限

获取某个节点的acl权限信息：getAcl

#获取节点权限信息默认为 world:cdrwa任何人都可以访问
[zk: localhost:2181(CONNECTED) 34] getAcl /merryyou
'world,'anyone
: cdrwa
[zk: localhost:2181(CONNECTED) 35]

设置权限：setAcl

[zk: localhost:2181(CONNECTED) 35] create /merryyou/test test
Created /merryyou/test
[zk: localhost:2181(CONNECTED) 36] getAcl /merryyou/test
'world,'anyone
: cdrwa
#设置节点权限 crwa 不允许删除
[zk: localhost:2181(CONNECTED) 37] setAcl /merryyou/test world:anyone:crwa
cZxid = 0x200000018
ctime = Sat Jun 02 16:18:18 UTC 2018
mZxid = 0x200000018
mtime = Sat Jun 02 16:18:18 UTC 2018
pZxid = 0x200000018
cversion = 0
dataVersion = 0
aclVersion = 1
ephemeralOwner = 0x0
dataLength = 4
numChildren = 0
#查询刚才设置的acl权限信息 crwa 没有删除权限
[zk: localhost:2181(CONNECTED) 38] getAcl /merryyou/test
'world,'anyone
: crwa
[zk: localhost:2181(CONNECTED) 39]
[zk: localhost:2181(CONNECTED) 39] create /merryyou/test/abc abc
Created /merryyou/test/abc
#删除子节点的时候提交权限不足
[zk: localhost:2181(CONNECTED) 40] delete /merryyou/test/abc
Authentication is not valid : /merryyou/test/abc
#设置节点的权限信息为rda
[zk: localhost:2181(CONNECTED) 41] setAcl /merryyou/test world:anyone:rda
cZxid = 0x200000018
ctime = Sat Jun 02 16:18:18 UTC 2018
mZxid = 0x200000018
mtime = Sat Jun 02 16:18:18 UTC 2018
pZxid = 0x20000001a
cversion = 1
dataVersion = 0
aclVersion = 2
ephemeralOwner = 0x0
dataLength = 4
numChildren = 1
[zk: localhost:2181(CONNECTED) 42] getAcl /merryyou/test
'world,'anyone
: dra
#可以成功删除
[zk: localhost:2181(CONNECTED) 43] delete /merryyou/test/abc
[zk: localhost:2181(CONNECTED) 46] ls /merryyou/test
[]
[zk: localhost:2181(CONNECTED) 47]
#设置节点信息为a admin
[zk: localhost:2181(CONNECTED) 47] setAcl /merryyou/test world:anyone:a
cZxid = 0x200000018
ctime = Sat Jun 02 16:18:18 UTC 2018
mZxid = 0x200000018
mtime = Sat Jun 02 16:18:18 UTC 2018
pZxid = 0x20000001d
cversion = 2
dataVersion = 0
aclVersion = 3
ephemeralOwner = 0x0
dataLength = 4
numChildren = 0
#获取 设置都提示权限不足
[zk: localhost:2181(CONNECTED) 49] get /merryyou/test
Authentication is not valid : /merryyou/test
[zk: localhost:2181(CONNECTED) 50] set /merryyou/test 123
Authentication is not valid : /merryyou/test
[zk: localhost:2181(CONNECTED) 51]

密码明文设置：acl Auth

[zk: localhost:2181(CONNECTED) 53] create /niocoder/merryyou merryyou
Created /niocoder/merryyou
#查询默认节点权限信息
[zk: localhost:2181(CONNECTED) 54] getAcl /niocoder/merryyou
'world,'anyone
: cdrwa
[zk: localhost:2181(CONNECTED) 55]
#使用auth设置节点权限信息
[zk: localhost:2181(CONNECTED) 2] setAcl /niocoder/merryyou auth:test:test:cdrwa
Acl is not valid : /niocoder/merryyou
# 注册test:test 账号密码
[zk: localhost:2181(CONNECTED) 3] addauth digest test:test
[zk: localhost:2181(CONNECTED) 4] setAcl /niocoder/merryyou auth:test:test:cdrwa
cZxid = 0x200000020
ctime = Sat Jun 02 16:32:08 UTC 2018
mZxid = 0x200000020
mtime = Sat Jun 02 16:32:08 UTC 2018
pZxid = 0x200000020
cversion = 0
dataVersion = 0
aclVersion = 1
ephemeralOwner = 0x0
dataLength = 8
numChildren = 0
#查询节点权限信息 密码为密文格式
[zk: localhost:2181(CONNECTED) 5] getAcl /niocoder/merryyou
'digest,'test:V28q/NynI4JI3Rk54h0r8O5kMug=
: cdrwa
[zk: localhost:2181(CONNECTED) 6]

密码密文设置：acl digest

[zk: localhost:2181(CONNECTED) 13] create /names test
Created /names
[zk: localhost:2181(CONNECTED) 14] getAcl /names
'world,'anyone
: cdrwa
#使用digest设置节点的权限信息 密码为test密文
[zk: localhost:2181(CONNECTED) 15] setAcl /names digest:test:V28q/NynI4JI3Rk54h0r8O5kMug=:cdra
cZxid = 0x400000006
ctime = Sun Jun 03 01:01:17 UTC 2018
mZxid = 0x400000006
mtime = Sun Jun 03 01:01:17 UTC 2018
pZxid = 0x400000006
cversion = 0
dataVersion = 0
aclVersion = 1
ephemeralOwner = 0x0
dataLength = 4
numChildren = 0
#查询节点权限信息
[zk: localhost:2181(CONNECTED) 16] getAcl /names
'digest,'test:V28q/NynI4JI3Rk54h0r8O5kMug=
: cdra
#获取节点信息提示权限不足
[zk: localhost:2181(CONNECTED) 5] get /names
Authentication is not valid : /names
# 注册账户
[zk: localhost:2181(CONNECTED) 4] addauth digest test:test
# 可以正常获取
[zk: localhost:2181(CONNECTED) 17] get /names
test
cZxid = 0x400000006
ctime = Sun Jun 03 01:01:17 UTC 2018
mZxid = 0x400000006
mtime = Sun Jun 03 01:01:17 UTC 2018
pZxid = 0x400000006
cversion = 0
dataVersion = 0
aclVersion = 1
ephemeralOwner = 0x0
dataLength = 4
numChildren = 0
#由于没有设置写权限不能修改节点 w
[zk: localhost:2181(CONNECTED) 18] set /names 111
Authentication is not valid : /names
[zk: localhost:2181(CONNECTED) 19] delete /names
[zk: localhost:2181(CONNECTED) 20]

控制客户端：acl ip

[zk: localhost:2181(CONNECTED) 22] create /niocoder/ip aa
Created /niocoder/ip
[zk: localhost:2181(CONNECTED) 23] get /niocoder/ip
aa
cZxid = 0x40000000a
ctime = Sun Jun 03 01:06:47 UTC 2018
mZxid = 0x40000000a
mtime = Sun Jun 03 01:06:47 UTC 2018
pZxid = 0x40000000a
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 2
numChildren = 0
# 添加ip控制的权限信息
[zk: localhost:2181(CONNECTED) 24] setAcl /niocoder/ip ip:192.168.0.68:cdrwa
cZxid = 0x40000000a
ctime = Sun Jun 03 01:06:47 UTC 2018
mZxid = 0x40000000a
mtime = Sun Jun 03 01:06:47 UTC 2018
pZxid = 0x40000000a
cversion = 0
dataVersion = 0
aclVersion = 1
ephemeralOwner = 0x0
dataLength = 2
numChildren = 0
[zk: localhost:2181(CONNECTED) 25] getAcl /niocoder/ip
'ip,'192.168.0.68
: cdrwa
[zk: localhost:2181(CONNECTED) 26]

超级管理员： acl super 使用super权限需要修改zkServer.sh，添加super管理员，重启zkServer.sh

"-Dzookeeper.DigestAuthenticationProvider.superDigest=test:V28q/NynI4JI3Rk54h0r8O5kMug="
 nohup "$JAVA" "-Dzookeeper.log.dir=${ZOO_LOG_DIR}" "-Dzookeeper.root.logger=${ZOO_LOG4J_PROP}" "-Dzookeeper.DigestAuthenticationprovider.superDigest=test:V28q/NynI4JI3Rk54h0r8O5kMug=" \
    -cp "$CLASSPATH" $JVMFLAGS $ZOOMAIN "$ZOOCFG" > "$_ZOO_DAEMON_OUT" 2>&1 < /dev/null &

#重启进入zkCli
#由于之前设置ip权限，所以不允许访问
[zk: localhost:2181(CONNECTED) 2] ls /niocoder/ip
Authentication is not valid : /niocoder/ip
#登录账号信息，即为管理员账号
[zk: localhost:2181(CONNECTED) 3] addauth digest test:test
#正常访问，节点内容为空
[zk: localhost:2181(CONNECTED) 4] ls /niocoder/ip
[]
[zk: localhost:2181(CONNECTED) 5] get /niocoder/ip
aa
cZxid = 0x40000000a
ctime = Sun Jun 03 01:06:47 UTC 2018
mZxid = 0x40000000a
mtime = Sun Jun 03 01:06:47 UTC 2018
pZxid = 0x40000000a
cversion = 0
dataVersion = 0
aclVersion = 1
ephemeralOwner = 0x0
dataLength = 2
numChildren = 0
[zk: localhost:2181(CONNECTED) 6]

4、四字命令Four Letter Words

使用四字命令需要安装nc命令,(yum install nc)

查看状态信息：stat

[root@localhost bin]# echo stat | nc 192.168.0.68 2181
Zookeeper version: 3.4.11-37e277162d567b55a07d1755f0b31c32e93c01a0, built on 11/01/2017 18:06 GMT
Clients:
 /192.168.0.68:49346[0](queued=0,recved=1,sent=0)

Latency min/avg/max: 0/0/4
Received: 62
Sent: 61
Connections: 1
Outstanding: 0
Zxid: 0x50000000a
Mode: follower
Node count: 10
[root@localhost bin]#

查看zookeeper是否启动：ruok

[root@localhost bin]# echo ruok | nc 192.168.0.68 2181
imok[root@localhost bin]#

列出没有处理的节点，临时节点：dump

imok[root@localhost bin]# echo dump | nc 192.168.0.68 2181
SessionTracker dump:
org.apache.zookeeper.server.quorum.LearnerSessionTracker@29805957
ephemeral nodes dump:
Sessions with Ephemerals (0):
[root@localhost bin]#

查看服务器配置：conf

[root@localhost bin]# echo conf | nc 192.168.0.68 2181
clientPort=2181
dataDir=/usr/home/zookeeper-3.4.11/data/version-2
dataLogDir=/usr/home/zookeeper-3.4.11/data/version-2
tickTime=2000
maxClientCnxns=60
minSessionTimeout=4000
maxSessionTimeout=40000
serverId=2
initLimit=10
syncLimit=5
electionAlg=3
electionPort=3888
quorumPort=2888
peerType=0
[root@localhost bin]#

显示连接到服务端的信息：cons

[root@localhost bin]# echo cons | nc 192.168.0.68 2181
 /192.168.0.68:49354[0](queued=0,recved=1,sent=0)

[root@localhost bin]#

显示环境变量信息：envi

[root@localhost bin]# echo envi | nc 192.168.0.68 2181
Environment:
zookeeper.version=3.4.11-37e277162d567b55a07d1755f0b31c32e93c01a0, built on 11/01/2017 18:06 GMT
host.name=localhost
java.version=1.8.0_111
java.vendor=Oracle Corporation
java.home=/usr/local/jdk1.8.0_111/jre
java.class.path=/usr/home/zookeeper-3.4.11/bin/../build/classes:/usr/home/zookeeper-3.4.11/bin/../build/lib/*.jar:/usr/home/zookeeper-3.4.11/bin/../lib/slf4j-log4j12-1.6.1.jar:/usr/home/zookeeper-3.4.11/bin/../lib/slf4j-api-1.6.1.jar:/usr/home/zookeeper-3.4.11/bin/../lib/netty-3.10.5.Final.jar:/usr/home/zookeeper-3.4.11/bin/../lib/log4j-1.2.16.jar:/usr/home/zookeeper-3.4.11/bin/../lib/jline-0.9.94.jar:/usr/home/zookeeper-3.4.11/bin/../lib/audience-annotations-0.5.0.jar:/usr/home/zookeeper-3.4.11/bin/../zookeeper-3.4.11.jar:/usr/home/zookeeper-3.4.11/bin/../src/java/lib/*.jar:/usr/home/zookeeper-3.4.11/bin/../conf:
java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
java.io.tmpdir=/tmp
java.compiler=<NA>
os.name=Linux
os.arch=amd64
os.version=3.10.0-514.10.2.el7.x86_64
user.name=root
user.home=/root
user.dir=/usr/home/zookeeper-3.4.11/bin
[root@localhost bin]#

查看zk的健康信息：mntr

[root@localhost bin]# echo mntr | nc 192.168.0.68 2181
zk_version  3.4.11-37e277162d567b55a07d1755f0b31c32e93c01a0, built on 11/01/2017 18:06 GMT
zk_avg_latency  0
zk_max_latency  4
zk_min_latency  0
zk_packets_received 68
zk_packets_sent 67
zk_num_alive_connections    1
zk_outstanding_requests 0
zk_server_state follower
zk_znode_count  10
zk_watch_count  0
zk_ephemerals_count 0
zk_approximate_data_size    124
zk_open_file_descriptor_count   32
zk_max_file_descriptor_count    4096
[root@localhost bin]#

展示watch的信息：wchs

[root@localhost bin]# echo wchs | nc 192.168.0.68 2181
0 connections watching 0 paths
Total watches:0
[root@localhost bin]#

显示session的watch信息 path的watch信息：wchc和wchp （需要在配置zoo.cfg文件中添加 4lw.commands.whitelist=*）

[root@localhost bin]# echo wchc | nc 192.168.0.68 2181
wchc is not executed because it is not in the whitelist.
[root@localhost bin]# echo wchp | nc 192.168.0.68 2181
wchp is not executed because it is not in the whitelist.

整理自：

https://www.cnblogs.com/jimcsharp/p/8358271.html

https://blog.csdn.net/dandandeshangni/article/details/80558383

posted @ 2020-01-13 10:44 pk.com.cn 阅读(1761) 评论(0) 编辑收藏举报

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zookeeper安装配置

1、下载安装

1、下载

2、安装

2、单机配置

1、配置

2、启动

3、连接

3、集群配置

1、配置

2、启动

3、连接

4、zookeeper指令

1、help

2、ls

3、create

4、get

5、set

6、delete

7、四字母命令