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[Openvpn-devel,v2] systemd: Change LimitNPROC to TasksMax and increase limit

Message ID 20260313223833.3813-1-gert@greenie.muc.de
State New
Headers show
Series [Openvpn-devel,v2] systemd: Change LimitNPROC to TasksMax and increase limit | expand

Commit Message

Gert Doering March 13, 2026, 10:38 p.m. UTC 
From: Frank Lichtenheld <frank@lichtenheld.com>

There were some complaints about valid setups
that ran into problems with LimitNPROC. This
is especially true since LimitNPROC limits
the total amounts of threads running for the
same uid, so if multiple openvpn services run
under the same user, they will compete for
resources. As suggested in the systemd
documentation change this to TasksMax which
really counts the threads running in one
specific service.

Also increase the limit. When using e.g.
resolvconf for DNS configuration the limit
can be exhausted just due to the amount of
nested shell scripts.

Github: Fixes #929
Change-Id: Ic877f9a9c6459c6eb97cde1099f47f0b196b8084
Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1539
---

This change was reviewed on Gerrit and approved by at least one
developer. I request to merge it to master.

Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1539
This mail reflects revision 2 of this Change.

Acked-by according to Gerrit (reflected above):
Gert Doering <gert@greenie.muc.de>
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Patch

diff --git a/distro/systemd/openvpn-client@.service.in b/distro/systemd/openvpn-client@.service.in
index 326bb73..340603e 100644
--- a/distro/systemd/openvpn-client@.service.in
+++ b/distro/systemd/openvpn-client@.service.in
@@ -12,7 +12,7 @@ 
 WorkingDirectory=/etc/openvpn/client
 ExecStart=@sbindir@/openvpn --suppress-timestamps --nobind --config %i.conf
 CapabilityBoundingSet=CAP_IPC_LOCK CAP_NET_ADMIN CAP_NET_RAW CAP_SETGID CAP_SETUID CAP_SETPCAP CAP_SYS_CHROOT CAP_DAC_OVERRIDE CAP_SYS_NICE
-LimitNPROC=10
+TasksMax=20
 DeviceAllow=/dev/null rw
 DeviceAllow=/dev/net/tun rw
 ProtectSystem=true
diff --git a/distro/systemd/openvpn-server@.service.in b/distro/systemd/openvpn-server@.service.in
index d43bce1..3462f33 100644
--- a/distro/systemd/openvpn-server@.service.in
+++ b/distro/systemd/openvpn-server@.service.in
@@ -12,7 +12,7 @@ 
 WorkingDirectory=/etc/openvpn/server
 ExecStart=@sbindir@/openvpn --status %t/openvpn-server/status-%i.log --status-version 2 --suppress-timestamps --config %i.conf
 CapabilityBoundingSet=CAP_IPC_LOCK CAP_NET_ADMIN CAP_NET_BIND_SERVICE CAP_NET_RAW CAP_SETGID CAP_SETUID CAP_SETPCAP CAP_SYS_CHROOT CAP_DAC_OVERRIDE CAP_SYS_NICE CAP_AUDIT_WRITE
-LimitNPROC=10
+TasksMax=20
 DeviceAllow=/dev/null rw
 DeviceAllow=/dev/net/tun rw
 ProtectSystem=true