On Wed, 24 Jan 2018, Yubin Ruan wrote:
On Mon, Jan 22, 2018 at 01:54:36PM +0100, Lennart Poettering wrote:
On So, 21.01.18 19:12, Yubin Ruan (ablacktsh...@gmail.com) wrote:
Hi,
I use offlineimap to synchronize my emails. I want it to do a synchronization
at system startup so recently I add a systemd service for it. However I always
get error like this:
EOF occurred in violation of protocol (_ssl.c:590)
This suggests your network doesn't work when you invoke this.
1. usually (after system startup) the same service is invoked by a timer
and it works well so there is no problem with the script.
2. I believe the network is reachable, because the system will
auto-connect WIFI after system startup. Maybe the initialization order is
not configured properly? If so please see my mail service file
below.
Well, this is necessarily racy: your network setup races agains your
offlineimap invocation...
I got in the configuration file
[Unit]
After=network.target
Isn't this enough to get the initialization order right?
No, network.target is mostly about ordering things correctly during
shutdown.
You need to do two things:
* Use After=network-online.target in your unit.
* Enable some _other_ service that detects when the network is "online"
(whatever that means), and that is ordered Before=network-online.target.
If you are using systemd-networkd, for instance, this service is
systemd-networkd-wait-online.service. If you are using NetworkManager, you
want NetworkManager-wait-online.service.
See https://www.freedesktop.org/wiki/Software/systemd/NetworkTarget/ for
further details.
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