The Gilda User Interface Discipline: Grid Computing, 07/08-2 Practical classes Inês Dutra, DCC/FCUP

2 Outline What is a User Interface (UI)? Installing the User Interface Testing the User Interface

3 What is a UI? The UI is a suite of clients and API that users and applications can use to access the gLite services. The gLite UI includes the following components:  VOMS command-line tools  Workload Management System clients and APIs  Logging and Bookkeeping clients and APIs  Data Transfer command-line clients and APIs  Data Catalog command-line clients and APIs  gLite I/O client and APIs  R-GMA client and APIs

4 Installing the User Interface ATTENTION: you do not need to go through these steps for our practical classes!! These steps are only useful if you want to install the UI on your own machine. For this discipline, we installed the virtual user interface that can be found at: (GILDA VM UI gLite 3.0 (Readme))GILDA VM UI gLite 3.0Readme Before installing the virtual UI, we need to install VMWare Player that can be found at:

5 UI installation and configuration After installing vmware player, you need to unpack the Gilda UI distribution and load the file with extension wmx to your vmware player. You may need to follow the steps at: To configure the ntp service (synchronisation) You need to be root to be able to follow these steps (root passwd: gildaadm)

6 Configuration these steps can be found at: Install ntp if not already available for your system: apt-get install ntp Add your time server in /etc/ntp.conf restrict mask nomodify notrap noquery server ntp-1.infn.it Edit /etc/ntp/step-tickers adding your(s) time server(s) hostname If you are running a firewall, you will have to allow inbound communication on the NTP port: -A INPUT -s -p udp --dport 123 -j ACCEPT Activate the ntpd service with the following commands: ntpdate cronos.cenam.mx service ntpd start chkconfig ntpd on You can check ntpd’s status with : ntpq -p

7 Configuration Add LFC settings (this is important to point to the right BDII): export LCG_GFAL_INFOSYS=glite-rb.ct.infn.it:2170

8 Testing the User Interface

9 Login to the virtual gilda user interface  ssh  Passwd: xx (where xx = 00, 01, 02,..., 19) Create.globus directory # mkdir.globus Copy your own certificates to the UI in directory.globus Verify and, if needed, change permissions of the certificates # chmod 400 userkey.pem # chmod 644 usercert.pem