On Tue, May 15, 2018 at 12:40 PM, Nicolas Kovacs <info@xxxxxxxxxxxxx> wrote:
> Hi,
>
> I'm running CentOS on all kinds of setups: servers, workstations,
> desktops and laptops.
>
> Up until now, I'm only using NetworkManager on laptops, since it makes
> sense to use it there. On servers and desktop clients, I usually remove
> it and configure the network "traditionally" by simply editing
> /etc/sysconfig/network-scripts/ifcfg-whatever, /etc/resolv.conf,
> /etc/hosts, /etc/hostname and /etc/sysconfig/network. Running
> NetworkManager on anything else than a laptop has never made any sense
> to me, since it's basically an extra layer of abstraction.
>
> With the latest update, the removal of NetworkManager on a desktop
> client isn't possible anymore, since 'yum remove NetworkManager' also
> tries to remove 'gdm', and disabling it on startup spews back all sorts
> of errors.
>
> If you folks at Red Hat are reading this, I have one question: WHY ?
>
> Niki Kovacs
>
Disclosure:
I'm not a folk at Red Hat ;-)
In CentOS / Fedora I simply disable NetworkManager service and put into
ifcfg-xxx (eg ifcfg-eth0) the line
NM_CONTROLLED=no
The network service is enabled by default, so this should be sufficient to
keep NetworkManager installed but not inerfering with your classic network
configuration.
On a just updated c7test vm
[root@c7test ~]# uptime
13:19:51 up 2 min, 1 user, load average: 0.10, 0.15, 0.07
[root@c7test ~]#
[root@c7test ~]# cat /etc/centos-release
CentOS Linux release 7.5.1804 (Core)
[root@c7test ~]#
[root@c7test ~]# systemctl status NetworkManager
● NetworkManager.service - Network Manager
Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service;
disabled; vendor preset: enabled)
Active: inactive (dead)
Docs: man:NetworkManager(8)
[root@c7test ~]# systemctl status network -l
● network.service - LSB: Bring up/down networking
Loaded: loaded (/etc/rc.d/init.d/network; bad; vendor preset: disabled)
Active: active (exited) since Tue 2018-05-15 13:17:27 CEST; 15s ago
Docs: man:systemd-sysv-generator(8)
Process: 700 ExecStart=/etc/rc.d/init.d/network start (code=exited,
status=0/SUCCESS)
May 15 13:17:21 c7test.mydomain systemd[1]: Starting LSB: Bring up/down
networking...
May 15 13:17:23 c7test.mydomain network[700]: Bringing up loopback
interface: [ OK ]
May 15 13:17:27 c7test.mydomain NET[1001]:
/etc/sysconfig/network-scripts/ifup-post : updated /etc/resolv.conf
May 15 13:17:27 c7test.mydomain network[700]: Bringing up interface eth0:
[ OK ]
May 15 13:17:27 c7test.mydomain systemd[1]: Started LSB: Bring up/down
networking.
[root@c7test ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group
default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state
UP group default qlen 1000
link/ether 00:1a:4a:16:01:00 brd ff:ff:ff:ff:ff:ff
inet 10.4.4.33/24 brd 10.4.4.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::21a:4aff:fe16:100/64 scope link
valid_lft forever preferred_lft forever
[root@c7test ~]#
HOIH,
Gianluca
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