Connect to ZooKeeper via CLI

Daria Barysheva

The simplest way to begin working with ZooKeeper is to use its command line interface (CLI). This console is available on each ZooKeeper node immediately after its installation. To start working with CLI, run the zkCli.sh script located in the /bin directory:

$ sudo /usr/lib/zookeeper/bin/zkCli.sh
The output
2021-12-15 11:04:55,901 [myid:] - INFO  [main:Environment@100] - Client environment:zookeeper.version=3.4.14-f42ef4b166f1e5c63117c75aed651589a0cce1b2, built on 08/06/2019 14:49 GMT
2021-12-15 11:04:55,903 [myid:] - INFO  [main:Environment@100] - Client environment:host.name=bds-adh-1.ru-central1.internal
2021-12-15 11:04:55,904 [myid:] - INFO  [main:Environment@100] - Client environment:java.version=1.8.0_312
2021-12-15 11:04:55,905 [myid:] - INFO  [main:Environment@100] - Client environment:java.vendor=Red Hat, Inc.
2021-12-15 11:04:55,906 [myid:] - INFO  [main:Environment@100] - Client environment:java.home=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.312.b07-1.el7_9.x86_64/jre
2021-12-15 11:04:55,906 [myid:] - INFO  [main:Environment@100] - Client environment:java.class.path=/usr/lib/zookeeper/bin/../zookeeper-server/target/classes:/usr/lib/zookeeper/bin/../build/classes:/usr/lib/zookeeper/bin/../zookeeper-server/target/lib/*.jar:/usr/lib/zookeeper/bin/../build/lib/*.jar:/usr/lib/zookeeper/bin/../lib/slf4j-log4j12-1.7.25.jar:/usr/lib/zookeeper/bin/../lib/slf4j-api-1.7.25.jar:/usr/lib/zookeeper/bin/../lib/netty-3.10.6.Final.jar:/usr/lib/zookeeper/bin/../lib/log4j-1.2.17.jar:/usr/lib/zookeeper/bin/../lib/jline-0.9.94.jar:/usr/lib/zookeeper/bin/../lib/audience-annotations-0.5.0.jar:/usr/lib/zookeeper/bin/../zookeeper-3.4.14.jar:/usr/lib/zookeeper/bin/../zookeeper-server/src/main/resources/lib/*.jar:/usr/lib/zookeeper/bin/../conf:
2021-12-15 11:04:55,906 [myid:] - INFO  [main:Environment@100] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
2021-12-15 11:04:55,906 [myid:] - INFO  [main:Environment@100] - Client environment:java.io.tmpdir=/tmp
2021-12-15 11:04:55,906 [myid:] - INFO  [main:Environment@100] - Client environment:java.compiler=<NA>
2021-12-15 11:04:55,906 [myid:] - INFO  [main:Environment@100] - Client environment:os.name=Linux
2021-12-15 11:04:55,906 [myid:] - INFO  [main:Environment@100] - Client environment:os.arch=amd64
2021-12-15 11:04:55,906 [myid:] - INFO  [main:Environment@100] - Client environment:os.version=3.10.0-1160.11.1.el7.x86_64
2021-12-15 11:04:55,907 [myid:] - INFO  [main:Environment@100] - Client environment:user.name=root
2021-12-15 11:04:55,907 [myid:] - INFO  [main:Environment@100] - Client environment:user.home=/root
2021-12-15 11:04:55,907 [myid:] - INFO  [main:Environment@100] - Client environment:user.dir=/home/dasha
2021-12-15 11:04:55,908 [myid:] - INFO  [main:ZooKeeper@442] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@4b85612c
Welcome to ZooKeeper!
2021-12-15 11:04:55,928 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1025] - Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
JLine support is enabled
2021-12-15 11:04:55,973 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@879] - Socket connection established to localhost/127.0.0.1:2181, initiating session
2021-12-15 11:04:55,981 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1299] - Session establishment complete on server localhost/127.0.0.1:2181, sessionid = 0x100005560090006, negotiated timeout = 30000

WATCHER::

WatchedEvent state:SyncConnected type:None path:null
[zk: localhost:2181(CONNECTED) 0]

The ZooKeeper CLI prompt starts with [zk: localhost:2181(CONNECTED) 0]. All subsequent commands should be written after it.

To logout from ZooKeeper CLI, use the following command:

quit
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