test/run: pass cloud-init data to qemu

This passes the redhat user with ssh key as an ISO image to our
qemu instances, making sure images relying on cloud-init rather than
hardcoded user credentials can be used in our tests.

Signed-off-by: Tom Gundersen <teg@jklm.no>

.travis.yml

@@ -21,7 +21,7 @@ matrix:
         - sudo env "PATH=$PATH" "PYTHONUNBUFFERED=1" "OSBUILD_TEST_BUILD_ENV=test/f27-build-from-ubuntu1804.json" test/run --image-info
     - language: python
       python: 3.7
-      before_install: sudo apt-get install -y qemu-kvm
+      before_install: sudo apt-get install -y qemu-kvm genisoimage
       script:
         # ubuntu's rpm package sets dbpath to ~/.rpmdb, which makes rpm fail...
         - sudo sh -c 'mkdir /etc/rpm; echo "%_dbpath /var/lib/rpm" > /etc/rpm/macros'

test/cloud-init/meta-data

@@ -0,0 +1,2 @@
+instance-id: nocloud
+local-hostname: vm

test/cloud-init/user-data

@@ -0,0 +1,4 @@
+#cloud-config
+user: redhat
+ssh_authorized_keys:
+  - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC61wMCjOSHwbVb4VfVyl5sn497qW4PsdQ7Ty7aD6wDNZ/QjjULkDV/yW5WjDlDQ7UqFH0Sr7vywjqDizUAqK7zM5FsUKsUXWHWwg/ehKg8j9xKcMv11AkFoUoujtfAujnKODkk58XSA9whPr7qcw3vPrmog680pnMSzf9LC7J6kXfs6lkoKfBh9VnlxusCrw2yg0qI1fHAZBLPx7mW6+me71QZsS6sVz8v8KXyrXsKTdnF50FjzHcK9HXDBtSJS5wA3fkcRYymJe0o6WMWNdgSRVpoSiWaHHmFgdMUJaYoCfhXzyl7LtNb3Q+Sveg+tJK7JaRXBLMUllOlJ6ll5Hod

test/run

@@ -87,21 +87,34 @@ def create_ssh_keys():
 
 @contextlib.contextmanager
 def qemu_boot_image(image_file):
-    # run in background
-    cmd = ["qemu-system-x86_64",
-           "-m", "2048",
-           "-snapshot",
-           "-accel", "accel=kvm:hvf:tcg",
-           "-net", "nic,model=rtl8139", "-net", "user,hostfwd=tcp::22-:22",
-           "-nographic",
-           image_file
-           ]
-    print(f"running qemu command: {' '.join(cmd)}")
-    vm = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
-    try:
-        yield None
-    finally:
-        vm.kill()
+    with tempfile.TemporaryDirectory() as dir:
+        # Create an ISO that cloud-init can consume with userdata.
+        subprocess.run(["genisoimage",
+                        "-quiet",
+                        "-input-charset", "utf-8",
+                        "-output", f"{dir}/cloudinit.iso",
+                        "-volid", "cidata",
+                        "-joliet",
+                        "-rock",
+                        f"{TEST_DIR}/cloud-init/user-data",
+                        f"{TEST_DIR}/cloud-init/meta-data"],
+                        check=True)
+        # run in background
+        cmd = ["qemu-system-x86_64",
+               "-m", "2048",
+               "-snapshot",
+               "-accel", "accel=kvm:hvf:tcg",
+               "-cdrom", f"{dir}/cloudinit.iso",
+               "-net", "nic,model=rtl8139", "-net", "user,hostfwd=tcp::22-:22",
+               "-nographic",
+               image_file
+               ]
+        print(f"running qemu command: {' '.join(cmd)}")
+        vm = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+        try:
+            yield None
+        finally:
+            vm.kill()
 
 
 @contextlib.contextmanager