Fix idempoency issue with PID of container (#622)

Fix #573
Signed-off-by: Sagi Shnaidman <sshnaidm@redhat.com>

plugins/module_utils/podman/podman_container_lib.py

@@ -1136,8 +1136,19 @@ class PodmanContainerDiff:
         return self._diff_update_and_compare('privileged', before, after)
 
     def diffparam_pid(self):
+        def get_container_id_by_name(name):
+            rc, podman_inspect_info, err = self.module.run_command(
+                [self.module.params["executable"], "inspect", name, "-f", "{{.Id}}"])
+            if rc != 0:
+                return None
+            return podman_inspect_info.strip()
+
         before = self.info['hostconfig']['pidmode']
         after = self.params['pid']
+        if after is not None and "container:" in after and "container:" in before:
+            if after.split(":")[1] == before.split(":")[1]:
+                return self._diff_update_and_compare('pid', before, after)
+            after = "container:" + get_container_id_by_name(after.split(":")[1])
         return self._diff_update_and_compare('pid', before, after)
 
     # TODO(sshnaidm) Need to add port ranges support

tests/integration/targets/podman_container_idempotency/tasks/idem_all.yml

@@ -332,6 +332,63 @@
   assert:
     that: test25 is changed
 
+- name: Run container for linking with PID
+  containers.podman.podman_container:
+    executable: "{{ test_executable | default('podman') }}"
+    image: "{{ idem_image }}"
+    name: idempotency
+    state: present
+  register: test26
+
+- name: Check info with PID
+  assert:
+    that: test26 is not changed
+
+- name: Run second container for linking with PID
+  containers.podman.podman_container:
+    executable: "{{ test_executable | default('podman') }}"
+    image: "{{ idem_image }}"
+    name: idempotency2
+    state: present
+    pid: "container:idempotency"
+  register: test27
+
+- name: Check info of second container with PID
+  assert:
+    that: test27 is changed
+
+- name: Run second container for linking with PID
+  containers.podman.podman_container:
+    executable: "{{ test_executable | default('podman') }}"
+    image: "{{ idem_image }}"
+    name: idempotency2
+    state: present
+    pid: "container:idempotency"
+  register: test28
+
+- name: Check info of second container with PID again
+  assert:
+    that: test28 is not changed
+
+- name: Run second container for linking with PID with container ID
+  containers.podman.podman_container:
+    executable: "{{ test_executable | default('podman') }}"
+    image: "{{ idem_image }}"
+    name: idempotency2
+    state: present
+    pid: "container:{{ test26.container.Id }}"
+  register: test29
+
+- name: Check info of second container with PID of container ID again
+  assert:
+    that: test29 is not changed
+
+- name: Remove dependant test container
+  containers.podman.podman_container:
+    executable: "{{ test_executable | default('podman') }}"
+    name: idempotency2
+    state: absent
+
 - name: Remove test container
   containers.podman.podman_container:
     executable: "{{ test_executable | default('podman') }}"