Add vmimage dependency runner

 VM image dependencies in tests

 * Comprehensive functional tests in `runner_vmimage.py`
 * Documentation section in dependencies guide
 * Example test and recipe JSON
 * Integration with resolver and check systems
 * Setup.py entry points for plugin discovery

Reference: avocado-framework#6043
Signed-off-by: Harvey Lynden <[email protected]>

avocado/plugins/runners/vmimage.py

@@ -0,0 +1,156 @@
+import hashlib
+import os
+import sys
+import traceback
+from multiprocessing import set_start_method
+
+from avocado.core.nrunner.app import BaseRunnerApp
+from avocado.core.nrunner.runner import BaseRunner
+from avocado.core.utils import messages
+from avocado.utils import vmimage
+
+
+class VMImageRunner(BaseRunner):
+    """Runner for dependencies of type vmimage
+
+    This runner handles downloading and caching of VM images.
+
+    Runnable attributes usage:
+
+     * kind: 'vmimage'
+
+     * uri: not used
+
+     * args: not used
+
+     * kwargs:
+      - provider: VM image provider (e.g., 'Fedora')
+      - version: version of the image
+      - arch: architecture of the image
+    """
+
+    name = "vmimage"
+    description = "Runner for dependencies of type vmimage"
+
+    def run(self, runnable):
+        try:
+            yield messages.StartedMessage.get()
+
+            provider = runnable.kwargs.get("provider")
+            version = runnable.kwargs.get("version")
+            arch = runnable.kwargs.get("arch")
+
+            if not all([provider, version, arch]):
+                stderr = "Missing required parameters: provider, version, and arch"
+                yield messages.StderrMessage.get(stderr.encode())
+                yield messages.FinishedMessage.get("error")
+                return
+
+            try:
+                # First get the image object
+                yield messages.StdoutMessage.get(
+                    f"Getting VM image for {provider} {version} {arch}".encode()
+                )
+
+                # Download the image
+                yield messages.StdoutMessage.get(
+                    f"Downloading VM image for: distro={provider}, version={version}, arch={arch}".encode()
+                )
+                try:
+                    # Get the image using vmimage utility with configured cache dir
+                    from avocado.core.settings import settings
+
+                    cache_dir = settings.as_dict().get("datadir.paths.cache_dirs")[0]
+
+                    # Validate provider exists
+                    provider = provider.lower()  # Normalize case
+                    available_providers = [
+                        p.name.lower() for p in vmimage.IMAGE_PROVIDERS
+                    ]
+                    if provider not in available_providers:
+                        raise ValueError(
+                            f"Provider '{provider}' not found. Available providers: {', '.join(available_providers)}"
+                        )
+
+                    image = vmimage.Image.from_parameters(
+                        name=provider, version=version, arch=arch, cache_dir=cache_dir
+                    )
+
+                    # Download and get the image path
+                    image_path = image.get()
+                    if not image_path or not os.path.exists(image_path):
+                        raise RuntimeError(
+                            f"Downloaded image not found at {image_path}"
+                        )
+
+                    # Verify the downloaded image
+                    if not os.path.isfile(image_path):
+                        raise RuntimeError(f"Image path is not a file: {image_path}")
+                    if os.path.getsize(image_path) == 0:
+                        raise RuntimeError(f"Image file is empty: {image_path}")
+                    if not image_path.endswith((".qcow2", ".raw")):
+                        raise RuntimeError(f"Unexpected image format: {image_path}")
+
+                    # Verify checksum if available
+                    checksum_file = image_path + ".CHECKSUM"
+                    if os.path.exists(checksum_file):
+                        with open(checksum_file, "r", encoding="utf-8") as f:
+                            expected_checksum = (
+                                f.read().strip().split()[0]
+                            )  # Handle 'sha256:...' format
+                        hasher = hashlib.sha256()
+                        with open(image_path, "rb") as f:
+                            while chunk := f.read(4096):
+                                hasher.update(chunk)
+                        actual_checksum = hasher.hexdigest()
+                        if actual_checksum != expected_checksum:
+                            raise RuntimeError(
+                                f"Checksum mismatch for {image_path}\n"
+                                f"Expected: {expected_checksum}\n"
+                                f"Actual:   {actual_checksum}"
+                            )
+
+                    yield messages.StdoutMessage.get(
+                        f"Successfully downloaded VM image to: {image_path}".encode()
+                    )
+                    yield messages.FinishedMessage.get("pass")
+
+                except Exception as e:
+                    raise RuntimeError(f"Failed to download image: {str(e)}")
+
+            except Exception as e:
+                yield messages.StderrMessage.get(
+                    f"Failed to get/download VM image: {str(e)}".encode()
+                )
+                yield messages.FinishedMessage.get(
+                    "error",
+                    fail_reason=str(e),
+                    fail_class=e.__class__.__name__,
+                    traceback=traceback.format_exc(),
+                )
+
+        except Exception as e:
+            yield messages.StderrMessage.get(traceback.format_exc().encode())
+            yield messages.FinishedMessage.get(
+                "error",
+                fail_reason=str(e),
+                fail_class=e.__class__.__name__,
+                traceback=traceback.format_exc(),
+            )
+
+
+class RunnerApp(BaseRunnerApp):
+    PROG_NAME = "avocado-runner-vmimage"
+    PROG_DESCRIPTION = "nrunner application for dependencies of type vmimage"
+    RUNNABLE_KINDS_CAPABLE = ["vmimage"]
+
+
+def main():
+    if sys.platform == "darwin":
+        set_start_method("fork")
+    app = RunnerApp(print)
+    app.run()
+
+
+if __name__ == "__main__":
+    main()

docs/source/guides/user/chapters/dependencies.rst

@@ -159,6 +159,17 @@ Following is an example of a test using the Package dependency:
 
 .. literalinclude:: ../../../../../examples/tests/passtest_with_dependency.py
 
+VM Image
+++++++++
+
+Support downloading virtual machine images from cloud providers. The
+parameters available to use the vmimage `type` of dependencies are:
+
+ * `type`: `vmimage`
+ * `provider`: The distribution name (e.g. 'Fedora')
+ * `version`: The OS version
+ * `arch`: The architecture
+
 Pip
 +++
 
@@ -196,6 +207,33 @@ effect on the spawner.
  * `uri`: the image reference, in any format supported by ``podman
    pull`` itself.
 
+VM Image
+++++++++
+
+Support downloading virtual machine images ahead of test execution time.
+This allows tests to have their required VM images downloaded and cached
+before the test execution begins, preventing timeout issues during the
+actual test run.
+
+ * `type`: `vmimage`
+ * `provider`: the VM image provider (e.g., 'Fedora')
+ * `version`: version of the image
+ * `arch`: architecture of the image
+
+Following is an example of a test using the VM Image dependency::
+
+    from avocado import Test
+
+    class VmimageTest(Test):
+        """
+        :avocado: dependency={"type": "vmimage", "provider": "fedora", "version": "41", "arch": "s390x"}
+        """
+        def test(self):
+            """
+            A test that requires a Fedora VM image
+            """
+            self.log.info("Test that uses a VM image")
+
 Ansible Module
 ++++++++++++++
 

examples/nrunner/recipes/runnable/vmimage_fedora.json

@@ -0,0 +1 @@
+{"kind": "vmimage", "kwargs": {"provider": "fedora", "version": "41", "arch": "x86_64"}}

examples/tests/dependency_vmimage.py

@@ -0,0 +1,58 @@
+#!/usr/bin/env python3
+
+import glob
+import os
+
+from avocado import Test
+
+
+class VmimageTest(Test):
+    """
+    Example test using vmimage dependency
+
+    :avocado: dependency={"type": "vmimage", "provider": "Fedora", "version": "41", "arch": "s390x"}
+    """
+
+    def test(self):
+        """
+        A test that requires a Fedora VM image
+        """
+        # Reconstruct cache path using same logic as vmimage runner
+        from avocado.core.settings import settings
+
+        # Get settings
+        cache_dir = settings.as_dict().get("datadir.paths.cache_dirs")[0]
+        # Match runner's normalization exactly
+        version = "41"
+        arch = "x86_64"
+
+        # Match actual filename pattern with build number
+        image_filename = f"Fedora-Cloud-Base-Generic-{version}-*.{arch}.qcow2"
+
+        # Search all hash directories for matching image
+        cache_base = os.path.join(cache_dir, "by_location")
+        found_files = []
+        searched_dirs = []
+
+        if os.path.exists(cache_base):
+            for dir_name in os.listdir(cache_base):
+                dir_path = os.path.join(cache_base, dir_name)
+                if os.path.isdir(dir_path):
+                    pattern = os.path.join(dir_path, image_filename)
+                    matches = glob.glob(pattern)
+                    found_files.extend(matches)
+                    searched_dirs.append(dir_path)
+
+        self.log.info(
+            "Searched %d cache directories: %s",
+            len(searched_dirs),
+            ", ".join(searched_dirs),
+        )
+
+        self.assertTrue(
+            len(found_files) > 0,
+            f"No VM images found matching pattern: {image_filename}\n"
+            f"Searched directories: {searched_dirs}\n"
+            f"Cache base path: {cache_base}",
+        )
+        self.log.info("VM image validation successful")

python-avocado.spec

@@ -239,6 +239,7 @@ PATH=%{buildroot}%{_bindir}:%{buildroot}%{_libexecdir}/avocado:$PATH \
 %{_bindir}/avocado-runner-pip
 %{_bindir}/avocado-runner-podman-image
 %{_bindir}/avocado-runner-sysinfo
+%{_bindir}/avocado-runner-vmimage
 %{_bindir}/avocado-software-manager
 %{_bindir}/avocado-external-runner
 %{python3_sitelib}/avocado*

selftests/check.py

@@ -630,6 +630,9 @@ def create_suites(args):  # pylint: disable=W0621
             {
                 "runner": "avocado-runner-pip",
             },
+            {
+                "runner": "avocado-runner-vmimage",
+            },
         ],
     }
 

selftests/functional/resolver.py

@@ -252,7 +252,8 @@ def test_runnables_recipe(self):
 package: 1
 pip: 1
 python-unittest: 1
-sysinfo: 1"""
+sysinfo: 1
+vmimage: 1"""
         cmd_line = f"{AVOCADO} -V list {runnables_recipe_path}"
         result = process.run(cmd_line)
         self.assertIn(