Zookeeper

Introduction

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Deploy By Binary

Quick Start

# download source
wget https://dlcdn.apache.org/zookeeper/zookeeper-3.7.1/apache-zookeeper-3.7.1-bin.tar.gz
mv apache-zookeeper-3.7.1-bin zookeeper-3.7.1 && cd zookeeper-3.7.1

Config and Boot

Config

# create data and logs dir
mkdir -p /opt/zookeeper-3.7.1/data
mkdir -p /opt/zookeeper-3.7.1/logs
cat > /opt/zookeeper-3.7.1/conf/zoo.cfg << "EOF"
tickTime=2000
initLimit=10
syncLimit=5
dataDir=/opt/zookeeper-3.7.1/data
dataLogDir=/opt/zookeeper-3.7.1/logs
clientPort=2181
# cluster mode: service communication and election
# server.0=1.1.1.1:2888:3888
# server.1=1.1.1.2:2888:3888
# server.2=1.1.1.3:2888:3888
maxClientCnxns=300
admin.enableServer=false
EOF

# create version_id file if cluster mode
# echo 0 > /opt/zookeeper-3.7.1/data/myid
# echo 1 > /opt/zookeeper-3.7.1/data/myid
# echo 2 > /opt/zookeeper-3.7.1/data/myid

Boot(systemd)

cat > /etc/systemd/system/zookeeper.service << "EOF"
[Unit]
Description=Zookeeper Server
Documentation=https://zookeeper.apache.org/
After=network.target
Wants=network-online.target

[Service]
Type=forking
# Environment=JAVA_HOME=/opt/jdk11
ExecStart=/opt/zookeeper-3.7.1/bin/zkServer.sh start
ExecStop=/opt/zookeeper-3.7.1/bin/zkServer.sh stop
ExecReload=/opt/zookeeper-3.7.1/bin/zkServer.sh restart
Restart=on-failure
RestartSec=5s
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl start zookeeper.service
systemctl enable zookeeper.service

Deploy By Container

Run On Docker

# https://hub.docker.com/_/zookeeper

Run On Kubernetes

Install by Helm

# Add and update repo
helm repo add bitnami https://charts.bitnami.com/bitnami --force-update

# Get charts package
helm pull bitnami/zookeeper --untar --version=13.8.7
cd zookeeper

# Install and verify
helm -n middleware install zookeeper . --set global.storageClass=nfs-client --set replicaCount=3 --create-namespace
kubectl -n middleware exec -it zookeeper-0 -- zkServer.sh status

Reference:

1. Official Website
2. Repository