HLT node

The following software are required on the HLT nodes (mostly to interact with Wincc, as the HLT software itself is either local or on cvmfs)


add file /etc/yum.repos.d/lhcb-online.repo
name=LHCb Online packages RHEL6 - $basearch

# check with

yum --disablerepo "*" --enablerepo "lhcb-online" list available

yum install FMC
yum install dim-*

Default users must be added to the system


groupadd bgv
useradd -p $(openssl passwd -1 chooseapasswd) online -g bgv
useradd -p $(openssl passwd -1 chooseapasswd) bgv -g bgv
usermod -g bgv rootbgv
usermod -a -G onliners rootbgv

Kill the firewall (not needed on the HLT)

service iptables stop
chkconfig iptables off

The kernel module "raw_cap_hack" is needed to allow a generic user (i.e. online) to open a raw socket. The kernel must be loaded on bgvctrl and HLT nodes, otherwise it's not possible to configure the HLT or the storage.

yum install raw_cap_hack-2.6-32-358.32.3.el6.x86_64.rpm
sudo yum install raw_cap_hack-2.6.x86_64
chkconfig raw_cap_hack on

(to force:)
rpm -i --force raw_cap_hack-2.6-32-358.32.3.el6.x86_64.rpm

# # # in case of receiver problem for storage:
check status with 
service raw_cap_hack status

if not loaded, then load it with 
service raw_cap_hack start

if it fails because the module can’t be found, make sure the module is present in the kernel modules in
cd /lib/modules/$(uname -r)/kernel/net/

if it is not present, then copy it there.
if it is present, but will not load because “not found”, then use depmod:

cd /lib/modules/$(uname -r)/

then load it with 
service raw_cap_hack start


Wincc starts the HLT in

by starting

The HLT is in 


The code for the HLT (the algorithms) is in
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Topic revision: r2 - 2017-10-01 - ColinBarschel
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