One thing missing from the list is that you need to have myid files on
each server that correspond to the servers id (specified in the conf file).
http://hadoop.apache.org/zookeeper/docs/current/zookeeperAdmin.html#sc_zkMulitServerSetup
You'd have a config on each system that looks something like:
tickTime=2000
dataDir=/var/zookeeper/
clientPort=2181
initLimit=10
syncLimit=5
server.1=zoo1.com:2888:3888
server.2=zoo2.com:2888:3888
server.3=zoo3.com:2888:3888
"You attribute the server id to each machine by creating a file named
myid, one for each server, which resides in that server's data
directory, as specified by the configuration file parameter dataDir. The
myid file consists of a single line containing only the text of that
machine's id. So myid of server 1 would contain the text "1" and nothing
else. The id must be unique within the ensemble and should have a value
between 1 and 255."
My ZK ensemble configuration generator may be a help to you:
http://bit.ly/mBEcF
(if any thing as an example of what the configuration/structure should
generally look like, also an easy way to test locally before trying to
deploy to remote systems)
Patrick
Henry Robinson wrote:
Nearly! 1+2 are correct, but you also need to start ZooKeeper on all three
instances with bin/zkServer.sh start.
Henry
On Wed, Dec 9, 2009 at 11:00 AM, Something Something <
mailinglist...@gmail.com> wrote:
Now that I have your attention..next question... :)
Now I would like to start a Zookeeper Quorum on 3 EC Instances. Read the
doc regarding... "Running Replicated ZooKeeper". It says "all servers in
the quorum should have the same configuration file".. Does this mean... I
should..
1) Download & Install ZooKeeper on all 3 instances (at the same location.)
2) Save the same zoo.cfg in /conf for all 3 instances.
3) On one instance (Master?), run...
bin/zkServer.sh start
Would that start ZooKeeper on all 3 instances? Thanks for the help.
On Wed, Dec 9, 2009 at 10:24 AM, Something Something <
mailinglist...@gmail.com> wrote:
Switched to 3.2.1. Much better. Got a command prompt. Thank you both.
On Wed, Dec 9, 2009 at 10:09 AM, Henry Robinson <he...@cloudera.com
wrote:
The 3.2.1 command line is a lot nicer (has an actual prompt, tab
auto-completion, shows your connection status etc) - if you can upgrade
to
3.2.1 which is a good deal more modern, I would recommend it. If I
recall
correctly, there was no prompt in 3.1.1...
Henry
On Wed, Dec 9, 2009 at 9:36 AM, Something Something <
mailinglist...@gmail.com> wrote:
Without -server made some progress, but don't see a command prompt.
Shouldn't I see one?
This is what I see:
2009-12-09 17:27:56,709 - INFO [main:zookee...@341] - Initiating
client
connection, host=127.0.0.1:2181 sessionTimeout=5000
watcher=org.apache.zookeeper.zookeepermain$mywatc...@32fb4f
2009-12-09 17:27:56,710 - INFO [main:clientc...@91] -
zookeeper.disableAutoWatchReset is false
2009-12-09 17:27:56,792 - INFO
[main-SendThread:clientcnxn$sendthr...@800
]
- Attempting connection to server /127.0.0.1:2181
2009-12-09 17:27:56,802 - INFO
[main-SendThread:clientcnxn$sendthr...@716
]
- Priming connection to java.nio.channels.SocketChannel[connected
local=/
127.0.0.1:49619 remote=/127.0.0.1:2181]
2009-12-09 17:27:56,806 - INFO
[main-SendThread:clientcnxn$sendthr...@868
]
- Server connection successful
WatchedEvent: Server state change. New state: SyncConnected
Should I just use 3.2.1 version?
On Wed, Dec 9, 2009 at 9:20 AM, Mahadev Konar <maha...@yahoo-inc.com>
wrote:
Hi,
Can you try this?
bin/zkCli.sh 127.0.0.1:2181
The -server command was added later as far as I remember.
Thanks
mahadev
On 12/9/09 9:05 AM, "Something Something" <mailinglist...@gmail.com
wrote:
I am trying to start ZooKeeper on an EC2 instance. Here's what I
did:
1) Downloaded & Unpacked ZooKeeper 3.1.1 on EC2 instance.
2) cp /conf/zoo_sample.cfg /conf/zoo.cfg
3) Changed the dataDir path to point to my EBS volume.
4) In one command window, ran /bin/zkServer.sh start
(The last message I see is... "Snapshotting: 0)
5) Opened another command window, and ran jps
(This shows a new process called, QuorumPeerMain. That's the only
one
I
see.)
6) As per documentation, tried
bin/zkCli.sh -server 127.0.0.1:2181
(This gives me IOException: USAGE)
7) So I ran:
bin/zkCli.sh -server 127.0.0.1:2181 ls
Got UnknownHostException: -server
8) So I tried various ways of specifying IP address in EC2, such
as:
10.xx.xx.xx
ec2-xx-xx-xx-xxx.compute-1.amazonaws.com
domU-12-31-xx-xx-xx-xx.compute-1.internal
domU-12-31-xx-xx-xx-xx
None of them worked. Keep getting UnknownHostException.
What am I doing wrong. Please help. Thanks.
