nanog mailing list archives
Re: Linux: concerns over systemd [OT]
From: Jeffrey Ollie <jeff () ocjtech us>
Date: Thu, 23 Oct 2014 01:55:40 -0500
On Thu, Oct 23, 2014 at 12:28 AM, George Herbert <george.herbert () gmail com> wrote:
Ok. As a highly on- list-topic example of why distrust is called for... Without referring to the systemd source code*, does anyone know what systemd uses to select between networking subsystems (i.e. NetworkManager, the new standard as of RHEL 7, vs /etc/ sysconfig/network-scripts/, etc.). NetworkManager is default but disableable and it magically falls back to network-scripts dir, but the fallback is nearly undocumented and the selection behavior appears completely undocumented.
systemctl status NetworkManager.service systemctl status network.service I don't think that there's anything magic about it, you have one or the other enabled. Adding NM_CONTROLLED=yes/no to /etc/sysconfig/network-scripts/ifcfg-* gives you per-interface control over whether NetworkManager or the network scripts are used for managing the interface. If neither is enabled you probably end up with no networking.
If by some chance you do know this, where did you come by that knowledge? Hopefully with URLs.
I have access to systems that run systemd and I tried a couple of things... Also, I've been managing Red Hat systems for a long time and have known about this for a while. But a little bit of googling and I found this: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Networking_Guide/sec-NetworkManager_and_the_Network_Scripts.html Unless you're running systemd-networkd, this is really distro-specific stuff as I expect that most distros will want to preserve some backward compatibility with "legacy" network configuration. -- Jeff Ollie
Current thread:
- Re: Linux: concerns over systemd [OT], (continued)
- Re: Linux: concerns over systemd [OT] Jim Mercer (Oct 27)
- Re: Linux: concerns over systemd [OT] Jeffrey Ollie (Oct 27)
- Re: Linux: concerns over systemd [OT] Jay Ashworth (Oct 27)
- Re: Linux: concerns over systemd [OT] Lamar Owen (Oct 27)
- Re: Linux: concerns over systemd [OT] Miles Fidelman (Oct 27)
- Re: Linux: concerns over systemd [OT] Jay Ashworth (Oct 28)
- Re: Linux: concerns over systemd [OT] Jim Mercer (Oct 22)
- Message not available
- Re: Linux: concerns over systemd [OT] Larry Sheldon (Oct 22)
- Re: Linux: concerns over systemd [OT] Simon Lyall (Oct 22)
- Re: Linux: concerns over systemd [OT] George Herbert (Oct 22)
- Re: Linux: concerns over systemd [OT] Jeffrey Ollie (Oct 22)
- Re: Linux: concerns over systemd [OT] joel jaeggli (Oct 22)
- Re: Linux: concerns over systemd [OT] nanog (Oct 23)
- Re: Linux: concerns over systemd [OT] Barry Shein (Oct 22)
- Re: Linux: concerns over systemd [OT] Miles Fidelman (Oct 21)
- Re: Linux: concerns over systemd [OT] Ricky Beam (Oct 21)
- Re: Linux: concerns over systemd [OT] Jay Ashworth (Oct 21)
- Re: Linux: concerns over systemd [OT] George Herbert (Oct 21)
- Re: Linux: concerns over systemd [OT] Miles Fidelman (Oct 22)
- Re: Linux: concerns over systemd [OT] Tom Hill (Oct 22)