Setup Zookeeper¶

Need to point zookeeper to our 3 master instances. This is done in the file /etc/mesos/zk

2181 is zookeeper’s default port.

On all masters, we need to setup a unique ID per zookeeper instance:

  • Master1: 1
  • Master2: 2
  • Master3: 3

to do so we need to do the following:

  1. Update /etc/zookeeper/conf/myid to 1, 2 or 3 depending on the master
  2. Setup zookeeper config file on each master
  3. Change the quorum value to reflect our cluster size. It should be set over 50% of the number of master instances. In this case it should be 2
# On master1
mkdir -p /etc/zookeeper/conf/
printf 1 | sudo tee /etc/zookeeper/conf/myid
printf "tickTime=2000\ndataDir=/var/lib/zookeeper\nclientPort=2181\ninitLimit=10\nsyncLimit=5\nserver.1=10.2.10.   10:2888:3888\nserver.2=10.2.10.20:2888:3888\nserver.3=10.2.10.30:2888:3888" | sudo tee /etc/zookeeper/conf/zoo.cfg
printf 2 | sudo tee /etc/mesos-master/quorum


# On master2
mkdir -p /etc/zookeeper/conf/
printf 2 | sudo tee /etc/zookeeper/conf/myid
printf "tickTime=2000\ndataDir=/var/lib/zookeeper\nclientPort=2181\ninitLimit=10\nsyncLimit=5\nserver.1=10.2.10.   10:2888:3888\nserver.2=10.2.10.20:2888:3888\nserver.3=10.2.10.30:2888:3888" | sudo tee /etc/zookeeper/conf/zoo.cfg
printf 2 | sudo tee /etc/mesos-master/quorum


# On master3
rm -rf /etc/zookeeper/
mkdir -p /etc/zookeeper/conf/
printf 3 | sudo tee /etc/zookeeper/conf/myid
printf "tickTime=2000\ndataDir=/var/lib/zookeeper\nclientPort=2181\ninitLimit=10\nsyncLimit=5\nserver.1=10.2.10.   10:2888:3888\nserver.2=10.2.10.20:2888:3888\nserver.3=10.2.10.30:2888:3888" | sudo tee /etc/zookeeper/conf/zoo.cfg
echo 2 | sudo tee /etc/mesos-master/quorum
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