Limit Alpine 3.18 test hacks to that version

test/integration/targets/ansible-test-container/runme.py

@@ -1069,17 +1069,22 @@ class ApkBootstrapper(Bootstrapper):
     def run(cls) -> None:
         """Run the bootstrapper."""
         # The `openssl` package is used to generate hashed passwords.
-        # crun added as podman won't install it as dep if runc is present
-        # but we don't want runc as it fails
-        # The edge `crun` package installed below requires ip6tables, and in
-        # edge, the `iptables` package includes `ip6tables`, but in 3.18 they
-        # are separate. Remove `ip6tables` once we update to 3.19.
-        packages = ['docker', 'podman', 'openssl', 'crun', 'ip6tables']
+        # The `crun` package must be explicitly installed since podman won't install it as dep if `runc` is present.
+        packages = ['docker', 'podman', 'openssl', 'crun']
+
+        if os_release.version_id.startswith('3.18.'):
+            # The 3.19 `crun` package installed below requires `ip6tables`, but depends on the `iptables` package.
+            # In 3.19, the `iptables` package includes `ip6tables`, but in 3.18 they are separate packages.
+            # Remove once 3.18 is no longer tested.
+            packages.append('ip6tables')
 
         run_command('apk', 'add', *packages)
-        # 3.18 only contains crun 1.8.4, to get 1.9.2 to resolve the run/shm issue, install crun from 3.19
-        # Remove once we update to 3.19
-        run_command('apk', 'upgrade', '-U', '--repository=http://dl-cdn.alpinelinux.org/alpine/v3.19/community', 'crun')
+
+        if os_release.version_id.startswith('3.18.'):
+            # 3.18 only contains `crun` 1.8.4, to get a newer version that resolves the run/shm issue, install `crun` from 3.19.
+            # Remove once 3.18 is no longer tested.
+            run_command('apk', 'upgrade', '-U', '--repository=http://dl-cdn.alpinelinux.org/alpine/v3.19/community', 'crun')
+
         run_command('service', 'docker', 'start')
         run_command('modprobe', 'tun')