On Mon, Jan 23, 2012 at 5:16 PM, Jordan Zimmerman <[email protected]> wrote: > The problem with 'ruok' is that it doesn't tell you the state of the > Instance. 'ruok' might return 'imok' but the instance might not be serving > due to some other error. Only a 'stat' will tell you that. > > -JZ >
Can you provide an example of what that would look like? A high Outstanding count? A Mode that's not "leader", "follower", or "observer"? -J > On 1/23/12 1:51 PM, "Philip Smith" <[email protected]> wrote: > >>There is a batch java program that does a health check: >> >>validateZookeeperService.validateZookeeperService() >> >> >>which basically runs the ruok command. You could run the stat command and >>parse out the response but I think 99% of what you want could be simply >>looking for 'imok' in the response to the ruok command. >> >>philip_smith@st11p00td-devlog001:~ 2 $ alias zkok >>alias zkok='for idx in 1 2 3 4 5 ; do export >>zkserver="st11p00td-zookeeper00${idx}" ; echo "$zkserver $( echo ruok | >>nc $zkserver 2181 )" ; done' >>philip_smith@st11p00td-devlog001:~ 3 $ zkok >>st11p00td-zookeeper001 imok >>st11p00td-zookeeper002 imok >>st11p00td-zookeeper003 imok >>st11p00td-zookeeper004 imok >>st11p00td-zookeeper005 imok >>philip_smith@st11p00td-devlog001:~ 4 $ >> >> >>On Jan 23, 2012, at 1:45 PM, Natarajan Suresh wrote: >> >>> I am trying to write a small health check script for the zookeeper >>>instances. The "stat" command gives me an output like this: >>> ===========================Zookeeper version: 3.3.3-1073969, built on >>>02/23/2011 22:27 GMTClients: >>>/127.0.0.1:38929[0](queued=0,recved=1,sent=0) >>>/17.155.7.152:37603[1](queued=0,recved=474752,sent=474752) >>> Latency min/avg/max: 0/0/35Received: 1113675Sent: 1113706Outstanding: >>>0Zxid: 0x2000e2925Mode: followerNode count: 71=========================== >>> How do I know that the server is ok ? I do not have a bad instance with >>>me to checkout what the output will be in that case. >>> If anyone has already written a health check script, can you please >>>share with me ? >>> Thanks >>> |Suresh| >> >> >>Regards, Philip >> >>Philip Smith >>Senior Software Engineer >>[email protected] >>408 862-1360 office >>530 574-1659 mobile >> >
