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Zookeeper

With options for Logs, Data Logs, and Data

Config Options

Environment variables

HOSTS #comma delimited, defaults to "localhost"

ZK_SERVER_ID #should be set

ZK_CLIENT_PORT #default 2181
ZK_PEER_PORT #default 2888
ZK_ELECTION_PORT #default 3888

ZK_MAX_CLIENT_CONNECTIONS #default 50
ZK_TICK_TIME #default 2000
ZK_SYNC_LIMIT #default 5

ZK_DATA_DIR #default /data
ZK_SECRETS_PATH #default /secrets

#optional if using kerberos
KERBEROS_KEYTAB_FILE #default zookeeper.keytab
KERBEROS_PRINCIPAL #should be set to enable SASL and kerberos settings

#optional java options (-Xmx, -Xms, etc)
JAVA_OPTIONS

DEBUG_CONFIG # set this to print the generated configs

Volumes

Delays in writing to the dataLog can make Zookeeper sad, so folks often recommend separate disks for the dataDir and the dataLogDir. I've exposed "data" and "data-log" as volumes so that you can attach them independently, ideally to separate physical disks.

Using Docker Data Containers

Just Using Data Containers

docker run -d -v /data --name zookeeper-data ubuntu:14.04 true
docker run -d -v /data-log --name zookeeper-data-log ubuntu:14.04 ubuntu:14.04 true

Seperate Physical Disks

docker run -d -v /disk1/zookeeper/data/:/data --name zookeeper-data ubuntu:14.04 true
docker run -d -v /disk2/zookeeper/data-log/:/data-log --name zookeeper-data-log ubuntu:14.04 true

Starting with Data Containers

docker run -e ZK_SERVER_ID=1 --restart=on-failure:10 --name zookeeper -p 2181:2181 -p 2888:2888 -p 3888:3888 -e HOSTS=pet100,pet110,pet120 -m 2g --volumes-from zookeeper-data --volumes-from zookeeper-data-log boritzio/docker-zookeeper
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boritzio
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