Enable integration tests in cgroupv2 env

Those needs to be run on the (Vagrant Fedora 31) host
(since we need real systemd running), and so we have
to have all the tools needed to compile runc and run
the tests.

The good news is Fedora packages a decent and recent release
of bats-core (1.1.0), which we can use (Debian does not),
and we can also use golang (currently 1.13.9) from Fedora.

The bad news are

 1. Currently cgroups tests are only working with
    RUNC_USE_SYSTEMD=yes (addressed by #2299, #2305)

 2. Tests in events.bats do not work (need cgroupv2
    memory.events support)

 3. Fedora 31 image is 6 months old (and has broken
    container-selinux policy) so we need `dnf update`,
    which adds ~5 min to test time.

[v2: add -t to ssh to enforce pty]
[v3: disable events tests for cgroupv2]
[v4: update fedora packages, use a single dnf transation]

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

.travis.yml

@@ -34,6 +34,8 @@ matrix:
         - sudo ssh default sudo podman build -t test /vagrant
         # Mounting /lib/modules into the container is necessary as CRIU wants to load (via iptables) additional modules
         - sudo ssh default sudo podman run --privileged --cgroupns=private -v /lib/modules:/lib/modules:ro test make localunittest
+        # cgroupv2+systemd: test on vagrant host itself as we need systemd
+        - sudo ssh default -t 'cd /vagrant && sudo make localintegration RUNC_USE_SYSTEMD=yes'
   allow_failures:
     - go: tip
 

Vagrantfile

@@ -13,6 +13,12 @@ Vagrant.configure("2") do |config|
     v.cpus = 2
   end
   config.vm.provision "shell", inline: <<-SHELL
-    dnf install -y podman
+    cat << EOF | dnf -y shell
+config install_weak_deps: False
+update
+install podman make golang-go libseccomp-devel bats jq
+ts run
+EOF
+    dnf clean all
   SHELL
 end

tests/integration/events.bats

@@ -13,7 +13,8 @@ function teardown() {
 
 @test "events --stats" {
   # XXX: currently cgroups require root containers.
-  requires root
+  # TODO: support cgroup v2 memory.events
+  requires root cgroups_v1
 
   # run busybox detached
   runc run -d --console-socket $CONSOLE_SOCKET test_busybox
@@ -28,7 +29,8 @@ function teardown() {
 
 @test "events --interval default " {
   # XXX: currently cgroups require root containers.
-  requires root
+  # TODO: support cgroup v2 memory.events
+  requires root cgroups_v1
 
   # run busybox detached
   runc run -d --console-socket $CONSOLE_SOCKET test_busybox
@@ -55,7 +57,8 @@ function teardown() {
 
 @test "events --interval 1s " {
   # XXX: currently cgroups require root containers.
-  requires root
+  # TODO: support cgroup v2 memory.events
+  requires root cgroups_v1
 
   # run busybox detached
   runc run -d --console-socket $CONSOLE_SOCKET test_busybox
@@ -81,7 +84,8 @@ function teardown() {
 
 @test "events --interval 100ms " {
   # XXX: currently cgroups require root containers.
-  requires root
+  # TODO: support cgroup v2 memory.events
+  requires root cgroups_v1
 
   # run busybox detached
   runc run -d --console-socket $CONSOLE_SOCKET test_busybox