init

limits.spec

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+%define _systemd_confdir /usr/lib/systemd/system.conf.d
+
+Summary:	Set kernel limits
+Name:		limits
+Version:	1
+Release:	1
+License:	BSD
+Group:		System/Configuration/Boot and Init
+Url:		https://abf.io/import/limits
+BuildArch:	noarch
+
+%description
+Set kernel limits
+
+#------------------------------------------------------------------
+
+%package big
+Summary:	Set big enough kernel limits
+
+%description big
+Set big enough kernel limits
+
+%files big
+%config(noreplace) %{_sysconfdir}/security/limits.d/95-%{name}-big.conf
+# no %%config(noreplace), it can be overriden in /etc/systemd/system.conf.d/
+%{_systemd_confdir}/10-%{name}-big.conf
+
+#------------------------------------------------------------------
+
+%prep
+
+%install
+set -e
+set -u
+
+mkdir -p %{buildroot}
+mkdir -p %{buildroot}%{_sysconfdir}/security/limits.d
+mkdir -p %{buildroot}%{_systemd_confdir}
+
+# took some ideas from https://packages.altlinux.org/ru/sisyphus/srpms/pam-limits-desktop/
+
+# the same as default config in the "pam" package
+NPROC_SOFT=4096
+# 2^16
+NOFILE_SOFT=65536
+# 512*1024, as default @HIGH_RLIMIT_NOFILE@ in systemd
+NOFILE_HARD=524288
+
+cat > %{buildroot}%{_sysconfdir}/security/limits.d/95-%{name}-big.conf << EOF
+# limits.conf(5)
+* soft nproc $NPROC_SOFT
+* hard nproc unlimited
+* soft nofile $NOFILE_SOFT
+* hard nofile $NOFILE_HARD
+EOF
+
+# https://github.com/systemd/systemd/issues/25478
+cat > %{buildroot}%{_systemd_confdir}/10-%{name}-big.conf << EOF
+# system.conf.d(5), systemd.exec(5)
+# Example commands to read current values:
+# systemd-analyze cat-config systemd/system.conf
+# systemctl show -p DefaultLimitNOFILESoft
+# cat /proc/PID/limits
+[Manager]
+DefaultLimitNPROC=$NPROC_SOFT:infinity
+DefaultLimitNOFILE=$NOFILE_SOFT:$NOFILE_HARD
+EOF
+
+set +u