Travis: use Vagrant to run VMs

This adds the minimal configuration to run Fedora 31 based VMs on
Travis.

This can be used to test cgroupv2 based tests, tests with vdso=off and
probably much more which requires booting a newer kernel.

As an example this builds CRIU on Fedora 31 and reconfigures it to boot
without VDSO support and runs one single test.

Signed-off-by: Adrian Reber <areber@redhat.com>

.travis.yml

@@ -12,6 +12,7 @@ env:
   - TR_ARCH=x86_64
   - TR_ARCH=x86_64      CLANG=1
   - TR_ARCH=openj9-test
+  - TR_ARCH=vagrant-fedora-no-vdso
 jobs:
   include:
     - os: linux

scripts/travis/Makefile

@@ -64,5 +64,13 @@ podman-test:
 openj9-test: restart-docker
 	./openj9-test.sh
 
+setup-vagrant:
+	./vagrant.sh setup
+
+vagrant-fedora-no-vdso: setup-vagrant
+	./vagrant.sh fedora-no-vdso
+
+.PHONY: setup-vagrant vagrant-fedora-no-vdso
+
 %:
 	$(MAKE) -C ../build $@$(target-suffix)

scripts/travis/vagrant.sh

@@ -0,0 +1,53 @@
+#!/bin/bash
+
+# This script is used to run vagrant based tests on Travis.
+# This script is started via sudo from .travis.yml
+
+set -e
+set -x
+
+VAGRANT_VERSION=2.2.7
+FEDORA_VERSION=31
+FEDORA_BOX_VERSION=31.20191023.0
+
+setup() {
+	apt-get -qq update
+	# Load the kvm modules for vagrant to use qemu
+	modprobe kvm kvm_intel
+
+	# Tar up the git checkout to have vagrant rsync it to the VM
+	tar cf criu.tar ../../../criu
+	wget https://releases.hashicorp.com/vagrant/${VAGRANT_VERSION}/vagrant_${VAGRANT_VERSION}_$(uname -m).deb -O /tmp/vagrant.deb && \
+		dpkg -i /tmp/vagrant.deb
+
+	apt-get -qq install -y libvirt-bin libvirt-dev qemu-utils qemu
+	systemctl restart libvirt-bin
+	vagrant plugin install vagrant-libvirt
+	vagrant init fedora/${FEDORA_VERSION}-cloud-base --box-version ${FEDORA_BOX_VERSION}
+	# The default libvirt Vagrant VM uses 512MB.
+	# Travis VMs should have around 7.5GB.
+	# Increasing it to 4GB should work.
+	sed -i Vagrantfile -e 's,^end$,  config.vm.provider :libvirt do |libvirt|'"\n"'    libvirt.memory = 4096;end'"\n"'end,g'
+	vagrant up --provider=libvirt
+	mkdir -p /root/.ssh
+	vagrant ssh-config >> /root/.ssh/config
+	ssh default sudo dnf install -y gcc git gnutls-devel nftables-devel libaio-devel \
+		libasan libcap-devel libnet-devel libnl3-devel make protobuf-c-devel \
+		protobuf-devel python3-flake8 python3-future python3-protobuf \
+		python3-junit_xml rubygem-asciidoctor iptables libselinux-devel
+	# Disable sssd to avoid zdtm test failures in pty04 due to sssd socket
+	ssh default sudo systemctl mask sssd
+	ssh default cat /proc/cmdline
+}
+
+fedora-no-vdso() {
+	ssh default sudo grubby --update-kernel ALL --args="vdso=0"
+	vagrant reload
+	ssh default cat /proc/cmdline
+	ssh default 'cd /vagrant; tar xf criu.tar; cd criu; make -j 4'
+	# Excluding the VDSO test as we are running without VDSO
+	# Excluding two cgroup tests which seem to fail because of cgroup2
+	ssh default 'cd /vagrant/criu/test; sudo ./zdtm.py run -a -x zdtm/static/cgroup04 -x zdtm/static/cgroup_ifpriomap -x zdtm/static/vdso01 --keep-going'
+}
+
+$1