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contrib/systemd: add a service file for osmo-trx-proxy

Add osmo-trx-proxy.service, and package it in osmo-trx-proxy along
with the postinst logic to create the 'osmocom' system user/group
it runs as, matching the other osmo-trx-* backends.

Change-Id: I8c5bc092dc5bf6bf07d6e80f64ac7fc06f0cfb96
Related: OS#6672
---
M contrib/systemd/Makefile.am
A contrib/systemd/osmo-trx-proxy.service
M debian/osmo-trx-proxy.install
A debian/osmo-trx-proxy.postinst
4 files changed, 52 insertions(+), 1 deletion(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-trx refs/changes/36/43636/1

diff --git a/contrib/systemd/Makefile.am b/contrib/systemd/Makefile.am
index 6566b97..b8cd7eb 100644
--- a/contrib/systemd/Makefile.am
+++ b/contrib/systemd/Makefile.am
@@ -2,7 +2,8 @@
   osmo-trx-lms.service \
   osmo-trx-uhd.service \
   osmo-trx-usrp1.service \
-  osmo-trx-ipc.service
+  osmo-trx-ipc.service \
+  osmo-trx-proxy.service
 
 if HAVE_SYSTEMD
 SYSTEMD_SERVICES =
@@ -23,5 +24,9 @@
 SYSTEMD_SERVICES += osmo-trx-ipc.service
 endif
 
+if ENABLE_PROXY
+SYSTEMD_SERVICES += osmo-trx-proxy.service
+endif
+
 systemdsystemunit_DATA = $(SYSTEMD_SERVICES)
 endif # HAVE_SYSTEMD
diff --git a/contrib/systemd/osmo-trx-proxy.service b/contrib/systemd/osmo-trx-proxy.service
new file mode 100644
index 0000000..8d79933
--- /dev/null
+++ b/contrib/systemd/osmo-trx-proxy.service
@@ -0,0 +1,23 @@
+[Unit]
+Description=Osmocom Virtual TRX Endpoint Proxy
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+Restart=always
+StateDirectory=osmocom
+WorkingDirectory=%S/osmocom
+User=osmocom
+Group=osmocom
+ExecStart=/usr/bin/osmo-trx-proxy -c /etc/osmocom/osmo-trx-proxy.cfg
+RestartSec=2
+AmbientCapabilities=CAP_SYS_NICE
+# CPU scheduling policy:
+CPUSchedulingPolicy=rr
+# For real-time scheduling policies an integer between 1 (lowest priority) and 99 (highest priority):
+CPUSchedulingPriority=21
+# See sched(7) for further details on real-time policies and priorities
+
+[Install]
+WantedBy=multi-user.target
diff --git a/debian/osmo-trx-proxy.install b/debian/osmo-trx-proxy.install
index d0309eb..0a3cb05 100644
--- a/debian/osmo-trx-proxy.install
+++ b/debian/osmo-trx-proxy.install
@@ -1,3 +1,4 @@
 etc/osmocom/osmo-trx-proxy.cfg
+lib/systemd/system/osmo-trx-proxy.service
 usr/bin/osmo-trx-proxy
 usr/share/doc/osmo-trx/examples/osmo-trx-proxy/osmo-trx-proxy.cfg /usr/share/doc/osmo-trx/examples/osmo-trx-proxy/
diff --git a/debian/osmo-trx-proxy.postinst b/debian/osmo-trx-proxy.postinst
new file mode 100755
index 0000000..d4857a2
--- /dev/null
+++ b/debian/osmo-trx-proxy.postinst
@@ -0,0 +1,22 @@
+#!/bin/sh -e
+case "$1" in
+	configure)
+		# Create the osmocom group and user (if it doesn't exist yet)
+		if ! getent group osmocom >/dev/null; then
+			groupadd --system osmocom
+		fi
+		if ! getent passwd osmocom >/dev/null; then
+			useradd \
+				--system \
+				--gid osmocom \
+				--home-dir /var/lib/osmocom \
+				--shell /sbin/nologin \
+				--comment "Open Source Mobile Communications" \
+				osmocom
+		fi
+		;;
+esac
+
+# dh_installdeb(1) will replace this with shell code automatically
+# generated by other debhelper scripts.
+#DEBHELPER#

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