Documentation
Rate This Document
Findability
Accuracy
Completeness
Readability
SubmitClose

Adding New Nodes to the Cluster

In this example, ceph4 and ceph5 are added to the cluster.

  1. Install the ZooKeeper software package based on Installing ZooKeeper.
  2. Configure myid for the new nodes (4 for ceph4 and 5 for ceph5 in this example).

    ceph4:

    1
2
    		 
    mkdir /opt/apache-zookeeper-3.6.3-bin-bcm/zkData
echo 4 > /opt/apache-zookeeper-3.6.3-bin-bcm/zkData/myid

    ceph5:

    1
2
    		 
    mkdir /opt/apache-zookeeper-3.6.3-bin-bcm/zkData
echo 5 > /opt/apache-zookeeper-3.6.3-bin-bcm/zkData/myid
  3. Configure the /opt/apache-zookeeper-3.6.3-bin-bcm/conf/zoo.cfg file of the new nodes.
     1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
    		 
    # The number of milliseconds of each tick
tickTime=1000
# The number of ticks that the initial 
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between 
# sending a request and getting an acknowledgement
syncLimit=2
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just 
# example sakes.
dataDir=/opt/apache-zookeeper-3.6.3-bin-bcm/zkData
# the port at which the clients will connect
clientPort=2182
# the maximum number of client connections.
# increase this if you need to handle more clients
maxClientCnxns=333
#
# Be sure to read the maintenance section of the 
# administrator guide before turning on autopurge.
#
# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
#
# The number of snapshots to retain in dataDir
autopurge.snapRetainCount=3
# Purge task interval in hours
# Set to "0" to disable auto purge feature
autopurge.purgeInterval=3

## Metrics Providers
#
# https://prometheus.io Metrics Exporter
#metricsProvider.className=org.apache.zookeeper.metrics.prometheus.PrometheusMetricsProvider
#metricsProvider.httpPort=7000
#metricsProvider.exportJvmInfo=true
server.80=ceph1:2889:3889;2182
server.90=ceph2:2889:3889;2182
server.100=ceph3:2889:3889;2182
server.4=ceph4:2889:3889;2182
server.5=ceph5:2889:3889;2182
4lw.commands.whitelist=*
  4. Start the ZooKeeper service on the new nodes.
    1
    		 
    /opt/apache-zookeeper-3.6.3-bin-bcm/bin/zkServer.sh start
  5. Query the ZooKeeper service status on the new nodes.
     1
 2
 3
 4
 5
 6
 7
 8
 9
10
    		 
    [root@ceph4 bin]# /opt/apache-zookeeper-3.6.3-bin-bcm/bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/apache-zookeeper-3.6.3-bin-bcm/bin/../conf/zoo.cfg
Client port found: 2182. Client address: localhost. Client SSL: false.
Mode: follower
[root@ceph5 bin]# /opt/apache-zookeeper-3.6.3-bin-bcm/bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/apache-zookeeper-3.6.3-bin/bin-bcm/../conf/zoo.cfg
Client port found: 2182. Client address: localhost. Client SSL: false.
Mode: follower