Four Letter Words

本是古典何须时尚 2022-05-12 13:44 123阅读 0赞

用途：Zookeeper可以通过Four Letter Words自身提供的简写命令来和服务器进行交互  
安装：yum install nc

常用命令：

\[stat\] 查看zk的状态信息，以及是否mode

[root@localhost ~]# echo stat | nc 172.16.1.160 2181
    Zookeeper version: 3.4.10-39d3a4f269333c922ed3db283be479f9deacaa0f, built on 03/23/2017 10:13 GMT
    Clients:
     /172.16.1.160:51288[0](queued=0,recved=1,sent=0)
    
    Latency min/avg/max: 0/0/184
    Received: 1455
    Sent: 1461
    Connections: 1
    Outstanding: 0
    Zxid: 0x20000001d
    Mode: follower
    Node count: 11

\[ruok\] 查看当前zkServer是否启动，返回imok

[root@localhost ~]# echo ruok | nc 172.16.1.160 2181
    imok[root@localhost ~]#

\[dump\] 列出未经吃力的会话和临时节点

[root@localhost ~]# echo dump | nc 172.16.1.160 2181
    SessionTracker dump:
    org.apache.zookeeper.server.quorum.LearnerSessionTracker@2b249cc7
    ephemeral nodes dump:
    Sessions with Ephemerals (1):
    0x1669eba65330001:
    	/names/tmp-dump

\[conf\] 查看服务器配置信息

[root@localhost ~]# echo conf | nc 172.16.1.160 2181
    clientPort=2181
    dataDir=/root/zookeeper/data/version-2
    dataLogDir=/root/zookeeper/logs/version-2
    tickTime=2000
    maxClientCnxns=60
    minSessionTimeout=4000
    maxSessionTimeout=40000
    serverId=1
    initLimit=10
    syncLimit=5
    electionAlg=3
    electionPort=3888
    quorumPort=2888
    peerType=0

\[cons\] 展示连接到服务器的客户端信息

[root@localhost ~]# echo cons | nc 172.16.1.160 2181
     /172.16.1.160:51308[0](queued=0,recved=1,sent=0)
     /127.0.0.1:60184[1](queued=0,recved=29,sent=29,sid=0x1669eba65330001,lop=PING,est=1540277571410,to=30000,lcxid=0x3,lzxid=0xffffffffffffffff,lresp=1540277834135,llat=0,minlat=0,avglat=2,maxlat=67)

\[envi\] 环境变量

[root@localhost ~]# echo envi | nc 172.16.1.160 2181
    Environment:
    zookeeper.version=3.4.10-39d3a4f269333c922ed3db283be479f9deacaa0f, built on 03/23/2017 10:13 GMT
    host.name=localhost
    java.version=1.8.0_181
    java.vendor=Oracle Corporation
    java.home=/root/jdk1.8.0_181/jre
    java.class.path=/root/zookeeper/bin/../build/classes:/root/zookeeper/bin/../build/lib/*.jar:/root/zookeeper/bin/../lib/slf4j-log4j12-1.6.1.jar:/root/zookeeper/bin/../lib/slf4j-api-1.6.1.jar:/root/zookeeper/bin/../lib/netty-3.10.5.Final.jar:/root/zookeeper/bin/../lib/log4j-1.2.16.jar:/root/zookeeper/bin/../lib/jline-0.9.94.jar:/root/zookeeper/bin/../zookeeper-3.4.10.jar:/root/zookeeper/bin/../src/java/lib/*.jar:/root/zookeeper/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=3.10.0-862.el7.x86_64
    user.name=root
    user.home=/root
    user.dir=/root/zookeeper/bin

\[mntr\] 查看健康信息

[root@localhost ~]# echo mntr | nc 172.16.1.160 2181
    zk_version	3.4.10-39d3a4f269333c922ed3db283be479f9deacaa0f, built on 03/23/2017 10:13 GMT
    zk_avg_latency	0
    zk_max_latency	184
    zk_min_latency	0
    zk_packets_received	1508
    zk_packets_sent	1514
    zk_num_alive_connections	2
    zk_outstanding_requests	0
    zk_server_state	follower
    zk_znode_count	12
    zk_watch_count	0
    zk_ephemerals_count	1
    zk_approximate_data_size	134
    zk_open_file_descriptor_count	34
    zk_max_file_descriptor_count	4096

\[wchs\] 展示watches

[root@localhost ~]# echo wchs | nc 172.16.1.160 2181
    0 connections watching 0 paths
    Total watches:0