2.2. escsCore1¶
This is the machie which runs most of the ACS containers and performs data storage operations.
configuration files can be found on the svn repo at:
http://svn.med.ira.inaf.it/repos/escsconf/escsCore1
The machine main configuration parameters are the following:
| PARAMETER | VALUE |
|---|---|
| hardware | Fujitsu Primergy RX101 S6 |
| CPU | Intel(R) Quad Core(TM) i3 CPU 540 @ 3.07GHz |
| RAM | 4GB |
| OS | Scientific Linux 5.3 i386 (32 bit) |
| Kernel | 2.6.18-128.1.1.el5PAE |
| hostname | escsCore1 |
| eth0 | 192.168.1.104 |
| eth1 | 192.168.51.104 |
2.2.1. OS installation¶
EscsCore1 is installed on a 500GB hard disk so partitioned:
[root@escsCore1 ~]# fdisk -l
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 6387 51199155 83 Linux
/dev/sda3 6388 7407 8193150 82 Linux swap / Solaris
/dev/sda4 7408 60801 428887305 5 Extended
/dev/sda5 7408 8624 9775521 83 Linux
/dev/sda6 8625 9233 4891761 83 Linux
/dev/sda7 9234 60801 414219928+ 83 Linux
and:
[root@escsCore1 ~]# mount
/dev/sda2 on / type ext3 (rw)
/dev/sda7 on /data type ext3 (rw)
/dev/sda6 on /tmp type ext3 (rw)
/dev/sda5 on /alma type ext3 (rw)
/dev/sda1 on /boot type ext3 (rw)
During the installation process packages are installed directly from the installation CD and we selected KDE desktop environment. We removed every accessory package related to office and productivity work.
2.2.2. Additional software¶
Software installation is performed in the same way as the escsMaster as detailed in Additional software and includes:
- cfitsio3100
- CCfits-2.1
- qt-X11-opensource 4.5.2
- gpfs
2.2.3. ACS Temporary Data¶
Temporary data are managed as in escsMaster in the same way explained in ACS Temporary Data
2.2.4. NTP¶
Ntp service for system clock synchronization is configured via /etc/ntp.conf and we also define a custom /root/bin/plot_loopstats command:
[root@escsCore1 /]# mkdir /var/log/ntpstats
[root@escsCore1 /]# chown ntp:ntp /var/log/ntpstats
[root@escsCore1 /]# service ntpd start
[root@escsCore1 /]# chkconfig ntpd on
[root@escsCore1 /]# /root/bin/plot_loopstats
2.2.5. Firewall¶
Iptables is configured in order to accept connections from the 192.168.1.0/24 and 192.168.51.0/24 subnets:
[root@escsCore1 /]# /root/bin/firewall
The script will configure and start iptables service while saving its configuration for sequent reboots.
2.2.6. NIS¶
Users and groups are imported via yellow pages service nis. Service configuration is done using the files:
/etc/yp.conf /etc/rc.local /etc/sysconfig/network /etc/idmapd.conf /etc/nsswitch.conf
For the service to run correctly it is important to well configure all domain names, hostnames and nisdomains to escsCore1.med.ira.inaf.it.
2.2.7. NFS and AUTOMOUNT¶
Home directories and the whole ACS system are imported from the escsMaster node via NFS. System partition is loaded via fstab. Note that /system/introot directory must exist:
[root@escsCore1 /]# mkdir /system
[root@escsCore1 /]# chown -R manager:escs /system
[root@escsCore1 /]# mkdir /system/introot
[root@escsCore1 /]# mkdir /system/configuration
[root@escsCore1 /]# chown manager:escs /system/introot
[root@escsCore1 /]# chown manager:escs /system/configuration
[root@escsCore1 /]# less /etc/fstab
...
192.168.1.98:/exports/system /system/introot nfs ro,soft,auto,intr,proto=tcp,port=2049,users,exec 0 0
While users’ homes are loaded at login time via automount:
[root@escsCore1 /]# less /etc/auto.master
...
/home /etc/auto.home --timeout=90
[root@escsCore1 /]# less /etc/auto.home
* -fstype=nfs,rw 192.168.1.98:/exports/home/&