HOWTO

🐧 Как установить автономный сервер ZooKeeper

by itisgood
written by itisgood

Установиvм автономный сервер ZooKeeper, чтобы поиграть с ним.

Обновим систему.

$ sudo apt update

Установим GnuPG.

$ sudo apt -y install gpg

Установим Java.

$ sudo apt -y install openjdk-11-jre-headless

Создайте выделенного пользователя zookeeper.

$ sudo adduser --system --home /opt/zookeeper --shell /bin/bash --uid 810  --group --disabled-login zookeeper

Создайте каталог для архива программного обеспечения.

$ sudo -u zookeeper mkdir /opt/zookeeper/software

Скачайте архив ZooKeeper и его ASCII-архивную подпись.

$ sudo -u zookeeper wget  --quiet --directory-prefix /opt/zookeeper/software https://downloads.apache.org/zookeeper/zookeeper-3.7.0/apache-zookeeper-3.7.0-bin.tar.gz

$ sudo -u zookeeper wget  --quiet --directory-prefix /opt/zookeeper/software https://downloads.apache.org/zookeeper/zookeeper-3.7.0/apache-zookeeper-3.7.0-bin.tar.gz.asc

Скачайте открытый ключ, используемый для подписи этого архива.

$ sudo -u zookeeper gpg --keyserver keyserver.ubuntu.com --recv-key AF3D175EC05DB249738D01AC8D8C3C3ED0B02E66

gpg: directory '/opt/zookeeper/.gnupg' created
gpg: keybox '/opt/zookeeper/.gnupg/pubring.kbx' created
gpg: /opt/zookeeper/.gnupg/trustdb.gpg: trustdb created
gpg: key 8D8C3C3ED0B02E66: public key "Damien Diederen (CODE SIGNING KEY) <ddiederen@apache.org>" imported
gpg: Total number processed: 1
gpg:               imported: 1</ddiederen@apache.org>

Проверьте подпись.

$ sudo -u zookeeper gpg --verify /opt/zookeeper/software/{apache-zookeeper-3.7.0-bin.tar.gz.asc,apache-zookeeper-3.7.0-bin.tar.gz}

gpg: Signature made Wed Mar 17 09:47:05 2021 UTC
gpg:                using RSA key AF3D175EC05DB249738D01AC8D8C3C3ED0B02E66
gpg: Good signature from "Damien Diederen (CODE SIGNING KEY) <ddiederen@apache.org>" [unknown]
gpg: WARNING: This key is not certified with a trusted signature!
gpg:          There is no indication that the signature belongs to the owner.
Primary key fingerprint: AF3D 175E C05D B249 738D  01AC 8D8C 3C3E D0B0 2E66</ddiederen@apache.org>

Создайте каталог приложения.

$ sudo -u zookeeper mkdir /opt/zookeeper/zookeeper

Распакуйте загруженный архив.

$ sudo -u zookeeper tar --directory /opt/zookeeper/zookeeper --strip-components 1 --extract --file /opt/zookeeper/software/apache-zookeeper-3.7.0-bin.tar.gz

Создайте каталог данных.

$ sudo -u zookeeper mkdir /opt/zookeeper/zookeeper/data

Используем пример конфигурации.

$ sudo -u zookeeper cp /opt/zookeeper/zookeeper/conf/{zoo_sample.cfg,zoo.cfg}

Обновление каталога данных в конфигурационном файле.

$ sudo -u zookeeper sed -i -e "s/^dataDir=\/tmp\/zookeeper/dataDir=\/opt\/zookeeper\/zookeeper\/data/" /opt/zookeeper/zookeeper/conf/zoo.cfg

Проверим конфигурацию.

$ sudo -u zookeeper grep -v ^# /opt/zookeeper/zookeeper/conf/zoo.cfg

tickTime=2000
initLimit=10
syncLimit=5
dataDir=/opt/zookeeper/zookeeper/data
clientPort=2181

Создайте файл службы systemd.

$ cat <<EOF | sudo tee /etc/systemd/system/zookeeper.service
[Unit]
Description=ZooKeeper Service
After=network-online.target 
Requires=network-online.target

[Service]
Type=forking

User=zookeeper
Group=zookeeper

ExecStart=/opt/zookeeper/zookeeper/bin/zkServer.sh --config /opt/zookeeper/zookeeper/conf start
ExecStop=/opt/zookeeper/zookeeper/bin/zkServer.sh --config /opt/zookeeper/zookeeper/conf stop
ExecReload=/opt/zookeeper/zookeeper/bin/zkServer.sh --config /opt/zookeeper/zookeeper/conf restart
WorkingDirectory=/opt/zookeeper

[Install]
WantedBy=multi-user.target
EOF

Перезагрузите демон systemd.

$ sudo systemctl daemon-reload

Проверьте состояние сервиса

$ sudo systemctl status zookeeper.service 

● zookeeper.service - ZooKeeper Service
     Loaded: loaded (/etc/systemd/system/zookeeper.service; disabled; vendor preset: enabled)
     Active: inactive (dead)

Запустите его:

$ sudo systemctl start zookeeper.service

Проверьте состояние сервиса

$ sudo systemctl status zookeeper.service 

● zookeeper.service - ZooKeeper Service
     Loaded: loaded (/etc/systemd/system/zookeeper.service; disabled; vendor preset: enabled)
     Active: active (running) since Fri 2021-06-11 12:32:25 UTC; 5s ago
    Process: 3728 ExecStart=/opt/zookeeper/zookeeper/bin/zkServer.sh start (code=exited, status=0/SUCCESS)
   Main PID: 3744 (java)
      Tasks: 30 (limit: 531)
     Memory: 45.4M
        CPU: 1.707s
     CGroup: /system.slice/zookeeper.service
             └─3744 java -Dzookeeper.log.dir=/opt/zookeeper/zookeeper/bin/../logs -Dzookeeper.log.file=zookeeper-zookeeper-serv>

Jun 11 12:32:24 zookeeper1 systemd[1]: Starting ZooKeeper Service...
Jun 11 12:32:24 zookeeper1 zkServer.sh[3728]: /usr/bin/java
Jun 11 12:32:24 zookeeper1 zkServer.sh[3728]: ZooKeeper JMX enabled by default
Jun 11 12:32:24 zookeeper1 zkServer.sh[3728]: Using config: /opt/zookeeper/zookeeper/bin/../conf/zoo.cfg
Jun 11 12:32:25 zookeeper1 zkServer.sh[3728]: Starting zookeeper ... STARTED
Jun 11 12:32:25 zookeeper1 systemd[1]: Started ZooKeeper Service.

Проверьте режим на сервере.

$ sudo -u zookeeper /opt/zookeeper/zookeeper/bin/zkServer.sh status

/usr/bin/java
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/zookeeper/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: standalone

Выполните CLI.

$ sudo -u zookeeper /opt/zookeeper/zookeeper/bin/zkCli.sh

/usr/bin/java                                                   
Connecting to localhost:2181                                                                                                    2021-06-11 12:37:29,517 [myid:] - INFO  [main:Environment@98] - Client environment:zookeeper.version=3.7.0-e3704b390a6697bfdf4b0bef79e3da7a4f6bac4b, built on 2021-03-17 09:46 UTC                                                                              2021-06-11 12:37:29,520 [myid:] - INFO  [main:Environment@98] - Client environment:host.name=zookeeper1.example.org
2021-06-11 12:37:29,520 [myid:] - INFO  [main:Environment@98] - Client environment:java.version=11.0.11                         2021-06-11 12:37:29,522 [myid:] - INFO  [main:Environment@98] - Client environment:java.vendor=Debian             
2021-06-11 12:37:29,522 [myid:] - INFO  [main:Environment@98] - Client environment:java.home=/usr/lib/jvm/java-11-openjdk-amd64
2021-06-11 12:37:29,522 [myid:] - INFO  [main:Environment@98] - Client environment:java.class.path=/opt/zookeeper/zookeeper/bin/../zookeeper-server/target/classes:/opt/zookeeper/zookeeper/bin/../build/classes:/opt/zookeeper/zookeeper/bin/../zookeeper-server/target/lib/*.jar:/opt/zookeeper/zookeeper/bin/../build/lib/*.jar:/opt/zookeeper/zookeeper/bin/../lib/zookeeper-prometheus-metrics-3.7.0.jar:/opt/zookeeper/zookeeper/bin/../lib/zookeeper-jute-3.7.0.jar:/opt/zookeeper/zookeeper/bin/../lib/zookeeper-3.7.0.jar:/opt/zookeeper/zookeeper/bin/../lib/snappy-java-1.1.7.7.jar:/opt/zookeeper/zookeeper/bin/../lib/slf4j-log4j12-1.7.30.jar:/opt/zookeeper/zookeeper/bin/../lib/slf4j-api-1.7.30.jar:/opt/zookeeper/zookeeper/bin/../lib/simpleclient_servlet-0.9.0.jar:/opt/zookeeper/zookeeper/bin/../lib/simpleclient_hotspot-0.9.0.jar:/opt/zookeeper/zookeeper/bin/../lib/simpleclient_common-0.9.0.jar:/opt/zookeeper/zookeeper/bin/../lib/simpleclient-0.9.0.jar:/opt/zookeeper/zookeeper/bin/../lib/netty-transport-native-unix-common-4.1.59.Final.jar:/opt/zookeeper/zookeeper/bin/../lib/netty-transport-native-epoll-4.1.59.Final.jar:/opt/zookeeper/zookeeper/bin/../lib/netty-transport-4.1.59.Final.jar:/opt/zookeeper/zookeeper/bin/../lib/netty-resolver-4.1.59.Final.jar:/opt/zookeeper/zookeeper/bin/../lib/netty-handler-4.1.59.Final.jar:/opt/zookeeper/zookeeper/bin/../lib/netty-common-4.1.59.Final.jar:/opt/zookeeper/zookeeper/bin/../lib/netty-codec-4.1.59.Final.jar:/opt/zookeeper/zookeeper/bin/../lib/netty-buffer-4.1.59.Final.jar:/opt/zookeeper/zookeeper/bin/../lib/metrics-core-4.1.12.1.jar:/opt/zookeeper/zookeeper/bin/../lib/log4j-1.2.17.jar:/opt/zookeeper/zookeeper/bin/../lib/jline-2.14.6.jar:/opt/zookeeper/zookeeper/bin/../lib/jetty-util-ajax-9.4.38.v20210224.jar:/opt/zookeeper/zookeeper/bin/../lib/jetty-util-9.4.38.v20210224.jar:/opt/zookeeper/zookeeper/bin/../lib/jetty-servlet-9.4.38.v20210224.jar:/opt/zookeeper/zookeeper/bin/../lib/jetty-server-9.4.38.v20210224.jar:/opt/zookeeper/zookeeper/bin/../lib/jetty-security-9.4.38.v20210224.jar:/opt/zookeeper/zookeeper/bin/../lib/jetty-io-9.4.38.v20210224.jar:/opt/zookeeper/zookeeper/bin/../lib/jetty-http-9.4.38.v20210224.jar:/opt/zookeeper/zookeeper/bin/../lib/javax.servlet-api-3.1.0.jar:/opt/zookeeper/zookeeper/bin/../lib/jackson-databind-2.10.5.1.jar:/opt/zookeeper/zookeeper/bin/../lib/jackson-core-2.10.5.jar:/opt/zookeeper/zookeeper/bin/../lib/jackson-annotations-2.10.5.jar:/opt/zookeeper/zookeeper/bin/../lib/commons-cli-1.4.jar:/opt/zookeeper/zookeeper/bin/../lib/audience-annotations-0.12.0.jar:/opt/zookeeper/zookeeper/bin/../zookeeper-*.jar:/opt/zookeeper/zookeeper/bin/../zookeeper-server/src/main/resources/lib/*.jar:/opt/zookeeper/zookeeper/bin/../conf
2021-06-11 12:37:29,522 [myid:] - INFO  [main:Environment@98] - Client environment:java.library.path=/usr/java/packages/lib:/usr/lib/x86_64-linux-gnu/jni:/lib/x86_64-linux-gnu:/usr/lib/x86_64-linux-gnu:/usr/lib/jni:/lib:/usr/lib
2021-06-11 12:37:29,522 [myid:] - INFO  [main:Environment@98] - Client environment:java.io.tmpdir=/tmp
2021-06-11 12:37:29,522 [myid:] - INFO  [main:Environment@98] - Client environment:java.compiler=
2021-06-11 12:37:29,522 [myid:] - INFO  [main:Environment@98] - Client environment:os.name=Linux
2021-06-11 12:37:29,523 [myid:] - INFO  [main:Environment@98] - Client environment:os.arch=amd64
2021-06-11 12:37:29,523 [myid:] - INFO  [main:Environment@98] - Client environment:os.version=5.10.0-3-amd64
2021-06-11 12:37:29,523 [myid:] - INFO  [main:Environment@98] - Client environment:user.name=zookeeper
2021-06-11 12:37:29,523 [myid:] - INFO  [main:Environment@98] - Client environment:user.home=/opt/zookeeper
2021-06-11 12:37:29,523 [myid:] - INFO  [main:Environment@98] - Client environment:user.dir=/tmp/hsperfdata_zookeeper
2021-06-11 12:37:29,523 [myid:] - INFO  [main:Environment@98] - Client environment:os.memory.free=4MB
2021-06-11 12:37:29,525 [myid:] - INFO  [main:Environment@98] - Client environment:os.memory.max=247MB
2021-06-11 12:37:29,525 [myid:] - INFO  [main:Environment@98] - Client environment:os.memory.total=7MB
2021-06-11 12:37:29,532 [myid:] - INFO  [main:ZooKeeper@637] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@68c4039c
2021-06-11 12:37:29,540 [myid:] - INFO  [main:X509Util@77] - Setting -D jdk.tls.rejectClientInitiatedRenegotiation=true to disable client-initiated TLS renegotiation
2021-06-11 12:37:29,547 [myid:] - INFO  [main:ClientCnxnSocket@239] - jute.maxbuffer value is 1048575 Bytes
2021-06-11 12:37:29,555 [myid:] - INFO  [main:ClientCnxn@1726] - zookeeper.request.timeout value is 0. feature enabled=false
Welcome to ZooKeeper!
JLine support is enabled
2021-06-11 12:37:29,624 [myid:localhost:2181] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1171] - Opening socket connection to server localhost/127.0.0.1:2181.
2021-06-11 12:37:29,625 [myid:localhost:2181] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1173] - SASL config status: Will not attempt to authenticate using SASL (unknown error)
2021-06-11 12:37:29,681 [myid:localhost:2181] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1005] - Socket connection established, initiating session, client: /127.0.0.1:34934, server: localhost/127.0.0.1:2181
2021-06-11 12:37:29,699 [myid:localhost:2181] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1438] - Session establishment complete on server localhost/127.0.0.1:2181, session id = 0x10000146eca0009, negotiated timeout = 30000

WATCHER::

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

Протестируйте некоторые команды.

[zk: localhost:2181(CONNECTED) 0] version

ZooKeeper CLI version: 3.7.0-e3704b390a6697bfdf4b0bef79e3da7a4f6bac4b, built on 2021-03-17 09:46 UTC

[zk: localhost:2181(CONNECTED) 1] ls -R /

/
/zookeeper
/zookeeper/config
/zookeeper/quota

 

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