[PATCH v3] ci: Add test cases for container fetching and loading

[Uladzimir Bely <ubely@ilbers.de>]

From: Jan Kiszka <jan.kiszka@siemens.com>

This plugs the two example recipes for loading container images into
VM-based testing. The test consists of running 'true' in the installed
alpine images.

Rather than enabling the ci user to do password-less sudo, this uses su
with the piped-in password. Another trick needed is to poll for the
images because loading is performed asynchronously.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Uladzimir Bely <ubely@ilbers.de>
---
 meta-test/recipes-core/images/isar-image-ci.bb |  2 ++
 testsuite/citest.py                            | 13 ++++++++++++-
 testsuite/scripts/test_prebuilt_containers.sh  | 16 ++++++++++++++++
 3 files changed, 30 insertions(+), 1 deletion(-)
 create mode 100755 testsuite/scripts/test_prebuilt_containers.sh


This is a drop-in replacement of patch 4 from "[PATCH v4 0/5] Introduce
container fetcher and pre-loader" series:
- Fixed syntax errors (incorrectly escaped '\$')
- Fixed long lines in order to pass flake8

Changes since v2:
- Run the tests in the VM that was previously run. This:
  - reduces test execution time;
  - avoids filesystem failures in the VM image caused by previously
    killed machine.

Changes since v1:
- Switched from running command to script for better readability.


diff --git a/meta-test/recipes-core/images/isar-image-ci.bb b/meta-test/recipes-core/images/isar-image-ci.bb
index e5d51e6e..9133da74 100644
--- a/meta-test/recipes-core/images/isar-image-ci.bb
+++ b/meta-test/recipes-core/images/isar-image-ci.bb
@@ -16,6 +16,7 @@ IMAGE_INSTALL += "sshd-regen-keys"
 
 # qemuamd64-bookworm
 WKS_FILE:qemuamd64:debian-bookworm ?= "multipart-efi.wks"
+IMAGE_INSTALL:append:qemuamd64:debian-bookworm = " prebuilt-docker-img prebuilt-podman-img"
 
 # qemuamd64-bullseye
 IMAGE_FSTYPES:append:qemuamd64:debian-bullseye ?= " cpio.gz tar.gz"
@@ -51,3 +52,4 @@ IMAGER_INSTALL:append:qemuarm:debian-bookworm ?= " ${SYSTEMD_BOOTLOADER_INSTALL}
 # qemuarm64-bookworm
 IMAGE_FSTYPES:append:qemuarm64:debian-bookworm ?= " wic.xz"
 IMAGER_INSTALL:append:qemuarm64:debian-bookworm ?= " ${GRUB_BOOTLOADER_INSTALL}"
+IMAGE_INSTALL:append:qemuarm64:debian-bookworm = " prebuilt-docker-img prebuilt-podman-img"
diff --git a/testsuite/citest.py b/testsuite/citest.py
index 7064c1e4..18d3af97 100755
--- a/testsuite/citest.py
+++ b/testsuite/citest.py
@@ -539,6 +539,7 @@ class VmBootTestFull(CIBaseTest):
             'bookworm',
             image='isar-image-ci',
             script='test_kernel_module.sh example_module',
+            keep=True,
         )
 
     def test_i386_buster(self):
@@ -577,7 +578,7 @@ class VmBootTestFull(CIBaseTest):
 
     def test_amd64_bookworm(self):
         self.init()
-        self.vm_start('amd64', 'bookworm', image='isar-image-ci')
+        self.vm_start('amd64', 'bookworm', image='isar-image-ci', keep=True)
 
     def test_arm_bookworm(self):
         self.init()
@@ -609,3 +610,13 @@ class VmBootTestFull(CIBaseTest):
             image='isar-image-ci',
             script='test_kernel_module.sh example_module',
         )
+
+    def test_amd64_bookworm_prebuilt_containers(self):
+        self.init()
+        self.vm_start('amd64', 'bookworm', image='isar-image-ci',
+                      script='test_prebuilt_containers.sh')
+
+    def test_arm64_bookworm_prebuilt_containers(self):
+        self.init()
+        self.vm_start('arm64', 'bookworm', image='isar-image-ci',
+                      script='test_prebuilt_containers.sh')
diff --git a/testsuite/scripts/test_prebuilt_containers.sh b/testsuite/scripts/test_prebuilt_containers.sh
new file mode 100755
index 00000000..1700e653
--- /dev/null
+++ b/testsuite/scripts/test_prebuilt_containers.sh
@@ -0,0 +1,16 @@
+#!/bin/sh
+
+echo root | su -c '\
+    set -e
+    export PATH=$PATH:/usr/sbin
+    for n in $(seq 30); do
+        docker images | grep -q alpine && break
+        sleep 10
+    done
+    docker run --rm quay.io/libpod/alpine:3.10.2 true
+    for n in $(seq 30); do
+        podman images | grep -q alpine && break
+        sleep 10
+    done
+    podman run --rm quay.io/libpod/alpine:latest true
+'
-- 
2.44.2

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