[sheepdog] [PATCH] multi-sheep cluster in one zookeeper cluster.

[Yuyang]

From: Ruoyu
Date: 2015-02-27 15:10
To: Xu Yifeng; Liu Yuan
CC: Yu Yang; sheepdog
Subject: Re: [sheepdog] [PATCH] multi-sheep cluster in one zookeeper cluster.
 
On 2015年02月27日 13:41, Xu Yifeng wrote:
>
> On 2015年02月27日 12:04, Liu Yuan wrote:
>> On Fri, Feb 27, 2015 at 11:51:22AM +0800, Yifeng Xu wrote:
>>> Is this patch really necessary ? I think zookeeper C client support
>>> chroot, if you read zookeeper.c source code, you will find it,
>>> here is some code quoted:
>>>
>>> /**
>>>   * Create a zookeeper handle associated with the given host and port.
>>>   */
>>> zhandle_t *zookeeper_init(const char *host, watcher_fn watcher,
>>>    int recv_timeout, const clientid_t *clientid, void *context, int 
>>> flags)
>>> ...
>>> //parse the host to get the chroot if
>>>      //available
>>>      index_chroot = strchr(host, '/');
>>>      if (index_chroot) {
>>>          zh->chroot = strdup(index_chroot);
>>>          if (zh->chroot == NULL) {
>>>              goto abort;
>>>          }
>>>
>> Intresting. How we take advantage of this feature? Did you mean that 
>> we can
>> just append the cluster id on to "host" parameter?
>>
>> Thanks
>> Yuan
>>
> Yes, we can.
Thanks for you advice. I have a problem in using this feature.
sheep exit with error when I try to start it with cluster option: -c 
zookeeper:127.0.0.1:2181/default,timeout=10000
 
The error message is as below.
 
Feb 27 15:00:21   INFO [main] zk_init(1401) version 3.4.6, address 
127.0.0.1:2181/default, timeout 10000
Feb 27 15:00:21   INFO [main] zk_init(1421) the negociated session 
timeout is 10000
Feb 27 15:00:21  ERROR [main] zk_queue_init(644) failed, path /sheepdog, 
no node
Feb 27 15:00:21  ERROR [main] main(954) failed to create sheepdog cluster
 
Is something wrong?
>
> Xu

The curreent version does not support , you must make sure that the root znode exists.
So you should create "/default" by hand  in zk before you start your sheep.

 
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