test: add ability to run tests remotely

Create a "make remote" target and a poor man's ansible to allow setting
up a remote F22 system and running integration tests on it.

To run tests remotely:

  make remote SSH_HOST=my.remote.f22.box

test/integration/f22/Makefile

@@ -1,4 +1,11 @@
-all: clean
+all:
+	$(error please specify local or remote)
+
+local: slow
+
+remote: remote_slow
+
+slow: clean
 	../kpatch-test
 
 quick: clean
@@ -9,3 +16,24 @@ cached:
 
 clean:
 	rm -f *.ko *.log COMBINED.patch
+
+check_host:
+ifndef SSH_HOST
+	$(error SSH_HOST is undefined)
+endif
+
+SSH_USER ?= root
+
+remote_setup: check_host
+	ssh $(SSH_USER)@$(SSH_HOST) exit
+	ssh $(SSH_USER)@$(SSH_HOST) "ls kpatch-setup &> /dev/null" || \
+	(scp remote-setup $(SSH_USER)@$(SSH_HOST):kpatch-setup && \
+	 ssh $(SSH_USER)@$(SSH_HOST) "./kpatch-setup")
+
+remote_sync: remote_setup
+	ssh $(SSH_USER)@$(SSH_HOST) "rm -rf kpatch-test"
+	rsync -Cavz --include=core $(shell readlink -f ../../..) $(SSH_USER)@$(SSH_HOST):kpatch-test
+	ssh $(SSH_USER)@$(SSH_HOST) "cd kpatch-test/kpatch && make"
+
+remote_slow: remote_sync
+	ssh $(SSH_USER)@$(SSH_HOST) "cd kpatch-test/kpatch/test/integration/f22 && make slow"

test/integration/f22/remote-setup

@@ -0,0 +1,45 @@
+#!/bin/bash -x
+
+# install rpms on a Fedora 22 system to prepare it for kpatch integration tests
+
+set -o errexit
+
+[[ $UID != 0 ]] && sudo=sudo
+
+warn() {
+	echo "ERROR: $1" >&2
+}
+
+die() {
+	warn "$@"
+	exit 1
+}
+
+install_rpms() {
+	# crude workaround for a weird dnf bug where it fails to download
+	$sudo dnf install -y $* || $sudo dnf install -y $*
+}
+
+install_rpms gcc elfutils elfutils-devel rpmdevtools pesign openssl numactl-devel wget patchutils
+
+$sudo dnf builddep -y kernel || $sudo dnf builddep -y kernel
+
+# install kernel debuginfo and devel RPMs for target kernel
+kverrel=$(uname -r)
+kverrel=${kverrel%.x86_64}
+kver=${kverrel%%-*}
+krel=${kverrel#*-}
+install_rpms https://kojipkgs.fedoraproject.org/packages/kernel/$kver/$krel/x86_64/kernel-debuginfo-$kver-$krel.x86_64.rpm https://kojipkgs.fedoraproject.org/packages/kernel/$kver/$krel/x86_64/kernel-debuginfo-common-x86_64-$kver-$krel.x86_64.rpm https://kojipkgs.fedoraproject.org/packages/kernel/$kver/$krel/x86_64/kernel-devel-$kver-$krel.x86_64.rpm
+
+# install version of gcc which was used to build the target kernel
+gccver=$(gcc --version |head -n1 |cut -d' ' -f3-)
+kgccver=$(readelf -p .comment /usr/lib/debug/lib/modules/$(uname -r)/vmlinux |grep GCC: | tr -s ' ' | cut -d ' ' -f6-)
+if [[ $gccver != $kgccver ]]; then
+	gver=$(echo $kgccver | awk '{print $1}')
+	grel=$(echo $kgccver | sed 's/.*-\(.*\))/\1/')
+	grel=$grel.$(rpm -q gcc |sed 's/.*\.\(.*\)\.x86_64/\1/')
+	install_rpms https://kojipkgs.fedoraproject.org/packages/gcc/$gver/$grel/x86_64/cpp-$gver-$grel.x86_64.rpm https://kojipkgs.fedoraproject.org/packages/gcc/$gver/$grel/x86_64/gcc-$gver-$grel.x86_64.rpm https://kojipkgs.fedoraproject.org/packages/gcc/$gver/$grel/x86_64/libgomp-$gver-$grel.x86_64.rpm
+fi
+
+install_rpms ccache
+ccache -M 5G