[Linux-cluster] ccs_test tool
Marcos Gil Ferreira David
marcos.david at efacec.pt
Thu Nov 16 10:15:21 UTC 2006
Thanks James.
I don't know much about python, but it seems simple enough for my
purposes.
Greetings,
Marcos David
-----Original Message-----
From: linux-cluster-bounces at redhat.com
[mailto:linux-cluster-bounces at redhat.com] On Behalf Of James Parsons
Sent: quarta-feira, 15 de Novembro de 2006 19:03
To: linux clustering
Subject: Re: [Linux-cluster] ccs_test tool
Marcos Gil Ferreira David wrote:
>Is the result will be the stdin to another app, no problem running as
>root.
>
>Guess will have to learn a bit about python...
>
>
>Thanks
>Marcos David
>
>-----Original Message-----
>From: linux-cluster-bounces at redhat.com
>[mailto:linux-cluster-bounces at redhat.com] On Behalf Of James Parsons
>Sent: quarta-feira, 15 de Novembro de 2006 17:42
>To: linux clustering
>Subject: Re: [Linux-cluster] ccs_test tool
>
>Marcos Gil Ferreira David wrote:
>
>
>
>>Hello,
>>
>>I have a two-node cluster with several services running on it. Each of
>>
>>
>
>
>
>>these services needs an ip address that configured in the cluster (a
>>Cluster IP Address).
>>
>>My problem is that in order for some of our applications to function
>>properly I need to know the ip address that is assigned to a given
>>service.
>>
>>Example:
>>
>>Extracted from /etc/cluster/cluster.conf:
>>
>>....
>>
>><service autostart="1" domain="cluster0" name="MySQL">
>>
>><fs ref="shared_mysql">
>>
>><ip ref="172.18.57.8">
>>
>><script ref="mysql"/>
>>
>></ip>
>>
>></fs>
>>
>></service>
>>
>>...
>>
>>Is there any application (perhaps ccs_test) that can give me the ip
>>address assigned to the MySQL service (or any other service), without
>>dumping the entire cluster.conf on console?
>>
>>
>>
>No, but a python script could pull it out for you in prolly less than
>20 lines. It would have to run as root, though, in order to read the
>conf file. Do you need this to work in an automated fashion as stdin to
>another app?
>
>-J
>
>
>
Ok...23 lines...you will need to add some error checking :)
#!/usr/bin/python
from xml.dom import minidom, Node
def main():
try:
parent = minidom.parse("/etc/cluster/cluster.conf")
except IOError, e:
pass #Do something meaningful here
nodes = parent.firstChild.getElementsByTagName('fs')
for node in nodes:
if node.hasAttribute('ref'):
ref = node.getAttribute('ref')
if ref.strip() == 'shared_mysql':
ipnodes = node.getElementsByTagName('ip') #There had better be
only one!
addr = ipnodes[0].getAttribute('ref')
print addr
else:
pass #Do something meaningful here as well...
if __name__ == "__main__":
main()
--
Linux-cluster mailing list
Linux-cluster at redhat.com
https://www.redhat.com/mailman/listinfo/linux-cluster
More information about the Linux-cluster
mailing list