It's easy enough to go out to each of the machines to do this, but it is much easier to let Puppet do the grunt work.
This is a class that will do just that for Red Hat based workstations (the class resides in its own file /etc/puppet/manifests/classes/nic_speed.pp):
class nic_speed {
case $hostname {
"host01",
"host02",
"host07",
"host08",
"host10": {
# Set the nics to 100 half
append_if_no_such_line{ eth0:
file => "/etc/sysconfig/network-scripts/ifcfg-eth0",
line => 'ETHTOOL_OPTS="speed 100 duplex half autoneg off"'}
}
default: { }
}
}
The hosts listed in the case statement will have the ETHTOOL_OPTS line appended to their ifcfg-eth0 file, all others will use the default, which is to do nothing.
append_if_no_such_line is not native functionality of Puppet and is part of a custom class called cfengine.pp that adds a few commonly used features of CFengine:
# /etc/puppet/manifests/classes/cfengine.pp
define append_if_no_such_line($file, $line, $refreshonly = 'false') {
exec { "/bin/echo '$line' >> '$file'":
unless => "/bin/grep -Fxqe '$line' '$file'",
path => "/bin",
refreshonly => $refreshonly,
}
}
define delete_lines($file, $pattern) {
exec { "sed -i -r -e '/$pattern/d' $file":
path => "/bin",
onlyif => "/bin/grep -E '$pattern' '$file'",
}
}
