On Wed, 23 Sep 2020 at 04:33, Carlos Lopez clopmz@outlook.com wrote:
Hi all,
With SystemD, how can I make certain service dependent on certain network interfaces being up?
For example, I have an 802.1ad bond interface I need to wait on for being up (this interface has no ip address assigned, it is used to capture networks packets with a tcpdump’s script). Every time this service fails because bond interface is not up.
I have configured the service as:
[Unit]
Description=tcpdump capture script
After=network.target
Wants=network-online.target
But it doesn’t work …. Any tip or trick?
So the network just calls the scripts and exits so they can take a while to get working. I think this website covers what you want to do
https://unix.stackexchange.com/questions/257888/systemd-wait-for-network-int...
systemctl list-units --no-pager | grep subsystem-net
Then look for the device which matches the one you are listening to. Change the After=network.target to
BindsTo=sys-devices-virtual-net-<device>.device After=sys-devices-virtual-net-<device>.device
where <device> is the interface you found (aka eth2, br9, bond0 etc)
My host is CentOS8 x86_64.
Regards, C. L. Martinez
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