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Problems Running Opscenter on a Single Node

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Started 11 months ago by adang
Latest reply from nickmbailey
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adang
Member

Hi,

I'm currently trying to run Datastax and Opscenter on a single Cassandra node; however, I'm running into some issues connecting to the web UI of Opscenter. I've been following the start up steps that were provided on the website, so I'm not exactly sure where I took a wrong turn.

Here's my opscenterd.log output:

2012-06-22 15:45:44-0700 [] INFO: Received SIGTERM, shutting down.
2012-06-22 15:45:44-0700 [] INFO: Main loop terminated.
2012-06-22 15:45:44-0700 [] INFO: Server Shut Down.
2012-06-22 15:47:49-0700 [] INFO: Log opened.
2012-06-22 15:47:49-0700 [] INFO: twistd 10.0.0 (/usr/bin/python2.6 2.6.5) starting up.
2012-06-22 15:47:49-0700 [] INFO: reactor class: twisted.internet.selectreactor.SelectReactor.
2012-06-22 15:47:49-0700 [] INFO: Logging level set to 'info'
2012-06-22 15:47:49-0700 [] INFO: OpsCenterdService startService
2012-06-22 15:47:49-0700 [] INFO: OpsCenter version: 2.1
2012-06-22 15:47:49-0700 [] INFO: Compatible agent version: 2.8
2012-06-22 15:47:49-0700 [] INFO: Cluster config dir './conf/clusters' does not exist yet
2012-06-22 15:47:49-0700 [] INFO: No clusters are configured yet, checking to see if a config migration is needed
2012-06-22 15:47:49-0700 [] INFO: Main config does not appear to include a cluster configuration, skipping migration
2012-06-22 15:47:49-0700 [] INFO: Cluster config dir './conf/clusters' does not exist yet
2012-06-22 15:47:49-0700 [] INFO: No clusters are configured
2012-06-22 15:47:49-0700 [] INFO: HTTP BASIC authentication disabled
2012-06-22 15:47:49-0700 [] INFO: Starting webserver with ssl disabled.
2012-06-22 15:47:49-0700 [] INFO: Unhandled error in Deferred:
2012-06-22 15:47:49-0700 [] Unhandled Error
Traceback (most recent call last):
File "/usr/lib/python2.6/dist-packages/twisted/scripts/_twistd_unix.py", line 317, in startApplication
app.startApplication(application, not self.config['no_save'])
File "/usr/lib/python2.6/dist-packages/twisted/application/app.py", line 713, in startApplication
service.IService(application).startService()
File "/usr/lib/python2.6/dist-packages/twisted/application/service.py", line 278, in startService
service.startService()
File "/usr/lib/python2.6/dist-packages/twisted/internet/defer.py", line 944, in unwindGenerator
return _inlineCallbacks(None, f(*args, **kwargs), Deferred())
--- <exception caught here> ---
File "/usr/lib/python2.6/dist-packages/twisted/internet/defer.py", line 823, in _inlineCallbacks
result = g.send(result)
File "build/lib/python2.6/site-packages/opscenterd/OpsCenterdService.py", line 47, in startService

File "build/lib/python2.6/site-packages/opscenterd/OpsCenterdService.py", line 123, in setupClusterManager

File "build/lib/python2.6/site-packages/opscenterd/ClusterServices.py", line 59, in __init__

File "build/lib/python2.6/site-packages/opscenterd/StatsReporter.py", line 71, in makeReporter

File "build/lib/python2.6/site-packages/opscenterd/StatsReporter.py", line 54, in __init__

exceptions.TypeError: __init__() takes exactly 2 arguments (3 given)

Posted 11 months ago #
nickmbailey
Key Master

it appears you have the python twisted library installed on your system and for some reason that version of the library is being used by OpsCenter rather than the bundled version of twisted. Do you have the PYTHONPATH environment variable set perhaps? If you can attach the output of running 'env' from the command line that would help.

Posted 11 months ago #
adang
Member

I don't have a PYTHONPATH environment variable set.

Here are the results from running the env command:

TERM=xterm
LS_COLORS=rs=0:di=01;34:ln=01;36:hl=44;37:pi=40;33:so=01;35:do=01;35:bd=40;33;01 :cd=40;33;01:or=40;31;01:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:e x=01;32:*.tar=01;31:*.tgz=01;31:*.arj=01;31:*.taz=01;31:*.lzh=01;31:*.lzma=01;31 :*.zip=01;31:*.z=01;31:*.Z=01;31:*.dz=01;31:*.gz=01;31:*.bz2=01;31:*.bz=01;31:*. tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.rar=01;31:*.ace=01;3 1:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.jpg=01;35:*.jpeg=01;35:*.gif= 01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*. xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01 ;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.o gm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35 :*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=0 1;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.axv =01;35:*.anx=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=00;36:*.au=00;36:*.flac=00;36:* .mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00; 36:*.wav=00;36:*.axa=00;36:*.oga=00;36:*.spx=00;36:*.xspf=00;36:
OPSC_HOME=/var/run/inter-project-datastax/datastax/opscenter-2.1
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/va r/run/intern-project-datastax/datastax/dse-2.1/bin:/var/run/intern-project-datas tax/datastax/dse-2.1/resources/cassandra/bin:/var/run/inter-project-datastax/dat astax/opscenter-2.1/bin
JAVA_HOME=/usr/local/java/jdk1.6.0_25
CASSANDRA_HOME=/var/run/intern-project-datastax/datastax/dse-2.1/resources/cassa ndra
LANG=en_US.UTF-8
CLASSPATH=:/var/run/intern-project-datastax/datastax/dse-2.1/resources/dse/lib/s lf4j-api-1.6.1.jar
LESSOPEN=| /usr/bin/lesspipe %s
DSE_HOME=/var/run/intern-project-datastax/datastax/dse-2.1
DISPLAY=localhost:14.0
LESSCLOSE=/usr/bin/lesspipe %s %s
_=/usr/bin/env

Posted 11 months ago #
nickmbailey
Key Master

What operating system/distribution/version are you running OpsCenter on?

Posted 11 months ago #
adang
Member

Suse Linux Enterprise Server 11.1 Service Pack 1

Posted 11 months ago #
nickmbailey
Key Master

Unfortunately OpsCenter isn't supported on Suse Linux. Are you able to install OpsCenter on one of the supported distributions listed here http://www.datastax.com/download/community ?

Posted 11 months ago #
adang
Member

Actually, I made a mistake. The environment we installed Datastax/Opscenter was actually Ubuntu.

Posted 11 months ago #
nickmbailey
Key Master

Can I have you make a small change to the bin/opscenter script and then attach the output. If you can comment out the last line in bin/opscenter and instead add 'echo $PYTHONPATH', that would be helpful. So the last two lines should read:

#"$PYTHON" $TWISTD $TWISTD_EXTRA -oy bin/start_opscenter.py
echo $PYTHONPATH

Thanks
Nick

Posted 11 months ago #
adang
Member

./src:/usr/lib/python2.6/site-packages:./src/lib/python2.6/site-packages:./lib/python2.6/site-packages:./lib/py:./lib/py-debian/2.6/amd64:/var/run/intern-project-datastax/datastax/opscenter-2.1/lib/py-win32/2.6/twisted:/var/run/intern-project-datastax/datastax/opscenter-2.1/lib/py-win32/2.6/twisted/internet

/var/run/intern-project-datastax/datastax/opscenter-2.1/lib/py-win32/2.6/twisted:/var/run/intern-project-datastax/datastax/opscenter-2.1/lib/py-win32/2.6/twisted/internet

at the end was an attempt to try to fix the problem.

EDIT:

I actually now have it pointing it to the right library it seems. I now get a different error relating to OpenSSL importing of crypto.

Traceback (most recent call last):
File "/var/run/intern-project-datastax/datastax/opscenter-2.1/lib/py-win32/2.6/twisted/scripts/_twistd_unix.py", line 317, in startApplication
app.startApplication(application, not self.config['no_save'])
File "/var/run/intern-project-datastax/datastax/opscenter-2.1/lib/py-win32/2.6/twisted/application/app.py", line 653, in startApplication
service.IService(application).startService()
File "/var/run/intern-project-datastax/datastax/opscenter-2.1/lib/py-win32/2.6/twisted/application/service.py", line 277, in startService
service.startService()
File "/var/run/intern-project-datastax/datastax/opscenter-2.1/lib/py-win32/2.6/twisted/internet/defer.py", line 1141, in unwindGenerator
return _inlineCallbacks(None, f(*args, **kwargs), Deferred())
--- <exception caught here> ---
File "/var/run/intern-project-datastax/datastax/opscenter-2.1/lib/py-win32/2.6/twisted/internet/defer.py", line 1020, in _inlineCallbacks
result = g.send(result)
File "build/lib/python2.6/site-packages/opscenterd/OpsCenterdService.py", line 47, in startService

File "build/lib/python2.6/site-packages/opscenterd/OpsCenterdService.py", line 123, in setupClusterManager

File "build/lib/python2.6/site-packages/opscenterd/ClusterServices.py", line 59, in __init__

File "build/lib/python2.6/site-packages/opscenterd/StatsReporter.py", line 71, in makeReporter

File "build/lib/python2.6/site-packages/opscenterd/StatsReporter.py", line 51, in __init__

File "build/lib/python2.6/site-packages/opscenterd/SslUtils.py", line 3, in <module>

File "/var/run/intern-project-datastax/datastax/opscenter-2.1/lib/py-win32/2.6/OpenSSL/__init__.py", line 36, in <module>
from OpenSSL import crypto
exceptions.ImportError: cannot import name crypto

Posted 11 months ago #
nickmbailey
Key Master

/var/run/intern-project-datastax/datastax/opscenter-2.1/lib/py-win32/2.6/twisted:/var/run/intern-project-datastax/datastax/opscenter-2.1/lib/py-win32/2.6/twisted/internet

I would remove these entries from your python path. Those are pointing to windows versions of the necessary python libraries which almost certainly won't work completely right on Ubuntu.

It looks like the correct entry is already on the python path. The location of the libraries that OpsCenter is complaining about is:

./lib/py-debian/2.6/amd64

It looks like that directory is correctly placed on the path. Perhaps there was a problem when unpacking the OpsCenter tarball? Can you paste the output of the following commands?

ls -lah /var/run/intern-project-datastax/datastax/opscenter-2.1/lib/py-debian/2.6/amd64/
ls -lah /var/run/intern-project-datastax/datastax/opscenter-2.1/lib/py-debian/2.6/amd64/twisted
ls -lah /var/run/intern-project-datastax/datastax/opscenter-2.1/lib/py-debian/2.6/amd64/twisted/internet

Posted 11 months ago #
adang
Member

ls -lah /var/run/intern-project-datastax/datastax/opscenter-2.1/lib/py-debian/2.6/amd64
total 0
drwxr-xr-x 6 root root 120 2012-06-19 16:57 .
drwxr-xr-x 4 root root 80 2012-06-19 16:57 ..
drwxr-xr-x 2 root root 100 2012-06-19 16:57 OpenSSL
drwxr-xr-x 4 root root 80 2012-06-19 16:57 thrift
drwxr-xr-x 18 root root 360 2012-06-19 16:57 twisted
drwxr-xr-x 3 root root 60 2012-06-19 16:57 zope

ls -lah /var/run/intern-project-datastax/datastax/opscenter-2.1/lib/py-debian/2.6/amd64/twisted/total 0
drwxr-xr-x 18 root root 360 2012-06-19 16:57 .
drwxr-xr-x 6 root root 120 2012-06-19 16:57 ..
drwxr-xr-x 2 root root 40 2012-06-19 16:57 application
drwxr-xr-x 2 root root 40 2012-06-19 16:57 cred
drwxr-xr-x 2 root root 40 2012-06-19 16:57 enterprise
drwxr-xr-x 3 root root 100 2012-06-19 16:57 internet
drwxr-xr-x 3 root root 60 2012-06-19 16:57 mail
drwxr-xr-x 3 root root 60 2012-06-19 16:57 manhole
drwxr-xr-x 2 root root 40 2012-06-19 16:57 names
drwxr-xr-x 3 root root 60 2012-06-19 16:57 persisted
drwxr-xr-x 2 root root 40 2012-06-19 16:57 plugins
drwxr-xr-x 4 root root 80 2012-06-19 16:57 protocols
drwxr-xr-x 3 root root 100 2012-06-19 16:57 python
drwxr-xr-x 2 root root 40 2012-06-19 16:57 scripts
drwxr-xr-x 3 root root 60 2012-06-19 16:57 spread
drwxr-xr-x 2 root root 40 2012-06-19 16:57 tap
drwxr-xr-x 2 root root 40 2012-06-19 16:57 trial
drwxr-xr-x 3 root root 60 2012-06-19 16:57 web

ls -lah /var/run/intern-project-datastax/datastax/opscenter-2.1/lib/py-debian/2.6/amd64/twisted/internet
total 16K
drwxr-xr-x 3 root root 100 2012-06-19 16:57 .
drwxr-xr-x 18 root root 360 2012-06-19 16:57 ..
-rw-r--r-- 1 root root 6.8K 2012-06-04 14:57 _c_urlarg.so
drwxr-xr-x 3 root root 60 2012-06-19 16:57 iocpreactor
-rw-r--r-- 1 root root 7.1K 2012-06-04 14:57 _sigchld.so

What I noticed is that when I used the py-debian library, it seemed to be lacking the defer.py that caused the error in the original post. I executed a find command on the library for it, and it's not there so it goes to the my local python libraries which doesn't contain the same twisted libraries.

Posted 11 months ago #
nickmbailey
Key Master

That output indicates your problem. The opscenter.tar.gz file contains symlinks to many shared files. It appears that when unpacking the opscenter tarball the symlinks were not preserved. How did you unpack the opscenter tar?

For example on my machine:

ls opscenter-2.1/lib/py-debian/2.5/amd64/twisted/
drwxr-xr-x@ 22 nick staff 748B Jun 4 17:57 ./
drwxr-xr-x@ 6 nick staff 204B Jun 4 17:57 ../
lrwxr-xr-x@ 1 nick staff 41B Jun 4 17:57 __init__.py -> ../../../../py-unpure/twisted/__init__.py
lrwxr-xr-x@ 1 nick staff 41B Jun 4 17:57 _version.py -> ../../../../py-unpure/twisted/_version.py
drwxr-xr-x@ 8 nick staff 272B Jun 4 17:57 application/
lrwxr-xr-x@ 1 nick staff 42B Jun 4 17:57 copyright.py -> ../../../../py-unpure/twisted/copyright.py
drwxr-xr-x@ 10 nick staff 340B Jun 4 17:57 cred/
drwxr-xr-x@ 8 nick staff 272B Jun 4 17:57 enterprise/
drwxr-xr-x@ 53 nick staff 1.8K Jun 4 17:57 internet/
drwxr-xr-x@ 18 nick staff 612B Jun 4 17:57 mail/
drwxr-xr-x@ 12 nick staff 408B Jun 4 17:57 manhole/
drwxr-xr-x@ 17 nick staff 578B Jun 4 17:57 names/
drwxr-xr-x@ 9 nick staff 306B Jun 4 17:57 persisted/
lrwxr-xr-x@ 1 nick staff 39B Jun 4 17:57 plugin.py -> ../../../../py-unpure/twisted/plugin.py
drwxr-xr-x@ 19 nick staff 646B Jun 4 17:57 plugins/
drwxr-xr-x@ 26 nick staff 884B Jun 4 17:57 protocols/
drwxr-xr-x@ 49 nick staff 1.6K Jun 4 17:57 python/
drwxr-xr-x@ 14 nick staff 476B Jun 4 17:57 scripts/
drwxr-xr-x@ 12 nick staff 408B Jun 4 17:57 spread/
drwxr-xr-x@ 8 nick staff 272B Jun 4 17:57 tap/
drwxr-xr-x@ 8 nick staff 272B Jun 4 17:57 trial/
drwxr-xr-x@ 32 nick staff 1.1K Jun 4 17:57 web/

Posted 11 months ago #
adang
Member

I think we simply ran a tar -xf on the tarball. Would something like that screw up the unpackaging?

I manually created the links just now for the py-debian directory, but I'm still having the same error output from the original post. If you read the snippet at the end of my last post before this, I mentioned that the /twisted/internet folder for the py-debian library was missing the defer.py and is also pretty empty in general (3-4 files compared to the other versions).

Posted 11 months ago #
nickmbailey
Key Master

No that should work fine. Perhaps you have an older version of tar? What version of Ubuntu and tar do you have?

lsb_release -a
tar --version

Posted 11 months ago #
adang
Member

lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 10.04.3 LTS
Release: 10.04
Codename: lucid

tar --version
tar (GNU tar) 1.22
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by John Gilmore and Jay Fenlason.

I also just edited my previous post with a little bit of info.

EDIT: Okay. So apparently there was something wrong with the initial unpacking because I just re-downloaded the OpsCenter tarball and there are A LOT more files now, including the symlinks you were talking about. I'm going to try to run it again and update this thread.

EDIT 2: Okay. I feel really dumb. It works now. Thanks so much for your help.

Posted 11 months ago #

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