chore: contrib: better packaging support

Import our internal CI spec for build ipmi_exporter. Currently depend on internet

Signed-off-by: Konstantin Shalygin <[email protected]>

Author: k0ste

contrib/README.md

@@ -0,0 +1,7 @@
+# Building a RPM Package
+
+You can build package with Docker in [mock container](//github.com/mmornati/docker-mock-rpmbuilder)
+
+```console
+docker run --rm --privileged --volume="${PWD}/contrib:/rpmbuild" -e MOUNT_POINT="/rpmbuild" -e MOCK_CONFIG="centos-stream-9-aarch64" -e SPEC_FILE="prometheus-ipmi-exporter.spec" -e NETWORK="true" mock ./build-rpm.sh
+```

contrib/prometheus-ipmi-exporter.spec

@@ -0,0 +1,92 @@
+%global debug_package %{nil}
+%define _build_id_links none
+Summary: Export IPMI metrics to Prometheus local or remotly
+Name: ipmi_exporter
+%define _name prometheus-ipmi-exporter
+%define _name2 ipmi-exporter
+Version: 1.10.1
+Release: 1%{?dist}
+License: MIT
+Requires: freeipmi
+BuildRequires: git systemd-rpm-macros
+BuildRequires: golang >= 1.23.0
+%define _uri github.com/prometheus-community
+%define _archversion db67a63b0fe42c5d7551145b566669f5960e02ed
+%define _archuri https://gitlab.archlinux.org/archlinux/packaging/packages/%{_name}/-/raw/%{_archversion}
+Url: https://%{_uri}/%{name}
+Source0: %{url}/archive/refs/tags/v%{version}.tar.gz
+Source1: %{_archuri}/sudoers.conf
+Source2: %{_archuri}/sysusers.conf
+Source3: %{_archuri}/systemd.service
+Source4: %{_archuri}/config.yml
+Source5: %{_archuri}/config.env
+
+%description
+Prometheus IPMI Exporter
+
+%prep
+%setup -c -q
+export GOPATH="%{_builddir}/gopath"
+export GOBIN="${GOPATH}/bin"
+mkdir -p "${GOPATH}/src/%{_uri}"
+ln -snf "%{_builddir}/%{name}-%{version}/%{name}-%{version}" \
+"${GOPATH}/src/%{_uri}/%{name}"
+
+%build
+export GOPATH="%{_builddir}/gopath"
+export GOBIN="${GOPATH}/bin"
+cd "${GOPATH}/src/%{_uri}/%{name}"
+
+eval "$(go env | grep -e "GOHOSTOS" -e "GOHOSTARCH")"
+GOOS="${GOHOSTOS}" GOARCH="${GOHOSTARCH}" BUILDTAGS="netgo static_build" \
+  go build -x \
+  -buildmode="pie" \
+  -trimpath \
+  -mod="readonly" \
+  -modcacherw \
+  -ldflags "-linkmode external \
+  -X github.com/prometheus/common/version.Version=%{version} \
+  -X github.com/prometheus/common/version.Revision=%{release} \
+  -X github.com/prometheus/common/version.Branch=tarball \
+  -X github.com/prometheus/common/version.BuildUser=$(whoami)@mockbuild \
+  -X github.com/prometheus/common/version.BuildDate=$(date +%%Y%%m%%d)"
+
+%install
+# remove arch-specific package name
+%{__sed} -i \
+  -e 's|'-/etc/prometheus/"%{_name2}".env'|'-/etc/conf.d/"%{name}"'|g' \
+  -e 's|'/usr/bin/"%{_name}"'|'/usr/bin/"%{name}"'|g' \
+  -e 's|'"%{_name2}".yml'|'"%{name}".yml'|g' \
+  "%SOURCE3"
+
+%{__sed} -i \
+  -e 's|'"%{_bindir}"'|'"%{_sbindir}"'|g' "%SOURCE1"
+
+install -Dm0755 "%{name}-%{version}/%{name}" -t "%{buildroot}%{_bindir}"
+install -Dm0644 "%SOURCE1" "%{buildroot}%{_sysconfdir}/sudoers.d/%{_name}"
+install -Dm0644 "%SOURCE2" "%{buildroot}%{_sysusersdir}/%{name}.conf"
+install -Dm0644 "%SOURCE3" "%{buildroot}%{_unitdir}/%{name}.service"
+install -Dm0644 "%SOURCE4" "%{buildroot}%{_sysconfdir}/prometheus/%{name}.yml"
+install -Dm0644 "%SOURCE5" "%{buildroot}%{_sysconfdir}/conf.d/%{name}"
+
+%pre
+%sysusers_create_package %{name} "%SOURCE2"
+
+%post
+%systemd_post %{name}.service
+
+%preun
+%systemd_preun %{name}.service
+
+%postun
+%systemd_postun_with_restart %{name}.service
+
+%files
+%license %{name}-%{version}/LICENSE
+%attr(0755,root,root) %{_bindir}/%{name}
+%defattr(0644,root,root,0755)
+%config(noreplace) %{_sysconfdir}/prometheus/%{name}.yml
+%config(noreplace) %{_sysconfdir}/conf.d/%{name}
+%{_sysconfdir}/sudoers.d/%{_name}
+%{_sysusersdir}/%{name}.conf
+%{_unitdir}/%{name}.service

contrib/rpm/README.md

@@ -0,0 +1,8 @@
+Defaults:prometheus-ipmi-exporter !log_allowed
+prometheus-ipmi-exporter ALL = NOPASSWD: /usr/bin/ipmimonitoring,\
+                           /usr/bin/ipmi-sensors,\
+                           /usr/bin/ipmi-dcmi,\
+                           /usr/bin/ipmi-raw,\
+                           /usr/bin/bmc-info,\
+                           /usr/bin/ipmi-chassis,\
+                           /usr/bin/ipmi-sel