18.07.2008

Openafs on Debian (Configuration)

A few days ago a friend asked me, how to install openafs on a Debian Linux. I told him, that he just has to follow my article on www.debianplanet.org...
But on www.debianplanet.org he only got the following information:
Temporarily removed due to spammers, read-only archive version will be back after reconfiguration.

OpenAFS Logo
So i searched in my files and finally i found my article:
Submitted by dschroff on Friday, November 01, 2002 - 23:59

Here the content:

This is a quick and dirty rundown of how to install OpenAFS and Kerberos 5 and get it all working. OpenAFS is a pretty advanced and rockin' distributed filesyste; for more information, check out openafs.org.
As an absolute minimum, you'll need to install the following packages:

libpam-openafs-session
openafs-client
openafs-krb5
openafs-modules-source
libkrb53
krb5-clients
krb5-config
krb5-doc
krb5-user
libpam-krb5
openafs-krb5


If you're running a server, you'll also need to install the following packages.


openafs-dbserver
openafs-fileserver
krb5-admin-server
krb5-kdc

Secondly, you'll need to set Kerberos up. Read and follow the instructions in /usr/share/doc/krb5-doc/install-guide.ps.gz and create a user called admin.
After this, you'll need to build the OpenAFS module. Extract the /usr/src/openafs.tar.gz file and
read /usr/src/modules/openafs/debian/README.modules; this will create the package and tell you how to install it.
After you're built OpenAFS, you'll need to configure this. First, edit /etc/openafs/ThisCell to set your domain name, then edit /etc/openafs/CellServDB, and add your server and domain. Copy these files to /etc/openafs/server and create a partition /vicepa for the data with a filesystem of your choice.
On the server, type:

#>kadmin.local -q "ank -randkey afs"
#>kadmin.local -q "ktadd -e des-cbc-crc:afs3 -k /etc/krb5.keytab.afs afs"
#>asetkey add foo /etc/krb5.keytab.afs afs
#>bosserver -noauth &
#>bos listhosts servername -noauth
#>bos create -server servername -instance ptserver -type simple -cmd /usr/lib/openafs/ptserver -cell domainname -noauth
#>bos adduser servername admin -cell domainname -noauth
#>bos listkeys servername -cell domainname -noauth
#>pts createuser -name admin -cell domainname -noauth
#>pts adduser admin system:administrators -cell domainname -noauth
#>pts membership admin -cell domainname -noauth
#>bos restart servername -all -cell domainname -noauth
#>bos create -server servername -instance fs -type fs -cmd /usr/lib/openafs/fileserver -cmd /usr/lib/openafs/volserver -cmd /usr/lib/openafs/salvager -cmd /usr/lib/openafs/vlserver -cell domainname -noauth
#>bos status servername fs -long -noauth
#>vos create -server servername -partition /vicepa -name root.afs -cell domainname -noauth
#>bos shutdown servername -wait
#>pkill bosserver
#>/etc/init.d/openafs-fileserver start
#>/etc/init.d/openafs-client start
#>kinit admin && klist
#>aklog && tokens
#>fs checkvolumes
#>fs setacl /afs system:anyuser rl
#>vos create servername /vicepa root.cell
#>fs mkmount /afs/domainname root.cell
#>fs setacl /afs/domainname system:anyuser rl
#>fs mkmount /afs/.domainname root.cell -rw
#>pts creategroup groupname -id -groupname
#>mkdir /afs/domainname/home

foo is the number of the key.
When you've done all this, it's time to add a user; you need a working NSS system for this. To add users, type:

#>adduser --disabled-password

To tell Kerberos and OpenAFS about your new user, type:

#>kadmin.local -q "ank -maxlife 30days username"
#>vos create servername /vicepa username
#>fs mkmount /afs/domainname/home/username username
#>vos release root.cell
#>fs checkvolumes
#>pts createuser username -id userid
#>pts adduser username groupname
#>fs sa /afs/domainname/home/username username all
#>fs setquota /afs/domainname/home/username -max 500000

Now you'll need to set up the /etc/pam.d files. Just play with the configuration files or send me an e-mail; even better, check out the debian-security archives.
Good luck!


Yes, i know there are better installation tutorials like this one, which is really excellent, but look at the references: [1] Installing OpenAFS, http://www.debianplanet.org/node.php?id=816 !!!!
I hope debianplanet will be back soon...

10.07.2008

The lost (collaxa) BPEL-tutorials: 104.SyncQuoteConsumer

The SyncQuoteConsumer tutorial shows how to call another BPEL workflow. As the title indicates, this is done in a synchronous way. (If you want to know how to call a BPEL workflow in an asynchronous way, wait for 105...)

To get the tutorial running you have to change in samples/utils/StockQuoteService in the StockQuoteService.bpel in bpelx:exec name="validate" the Element to oracle.xml.parser.v2.XMLElement:

String symbol = ((oracle.xml.parser.v2.XMLElement)
getVariableData("input", "symbol","/symbol"))
.getFirstChild().getNodeValue();

Here a screenshot of the original code and the changes made visible with the history feature of Jdeveloper:
(With the third tab on the bottom of the window, you can see, what changes you have done to your sources.)

In the StockQuoteService you have to change the build.properties to your port and password:
#admin.user = oc4jadmin
admin.password = mysecret
# http.hostname and http.port should point to BPEL Server's host and http port
#http.hostname = localhost
http.port = 7777
To deploy the StockQuoteService and the SyncQuoteConsumer you only have to run ant on the SyncQuoteConsumer build.xml because in this file the following is defined:

<target name="deploy" depends="pre-build, process-deploy, post-build" />
and the pre-build.xml just says:
<?xml version="1.0"?/>
<project name="bpel.pre-build" default="pre-build" basedir="."/>
<target name="StockQuoteService"/>
<ant dir="../../utils/StockQuoteService"//>
</target/>
<target name="pre-build" depends="StockQuoteService"//>
</project/>
and so both BPEL projects are deployed with one ant run.

To add a PartnerLink to a BPEL project follow this documentation.
The service explorer window should show the following (this works only after the deployment of the StockQuoteService!):
For more information about PartnerLinks look at this link.
Your PartnerLink has to look like:
If you want to change the PartnerLink to another BPEL click on the torch (red square) and you will get back to the service explorer.

To see that everything was done right, you can run the SyncQuoteConsumer with this message:

<symbol xmlns="http://samples.otn.com">ORCL</symbol>
and you will get the stock quote for Oracle....

One good thing of synchronous invocations: You need no correlation sets and it is very easy, but if the called instance needs more than 45s, you will get an ORABPEL-05002 error. You can learn avoiding it on my posting two months ago.