specify version for alternative alertmanager download

molecule/alternative/playbook.yml

@@ -4,7 +4,7 @@
   roles:
     - ansible-alertmanager
   vars:
-    alertmanager_binary_local_dir: '/tmp/alertmanager-0.18.0.linux-amd64'
+    alertmanager_binary_local_dir: '/tmp/alertmanager-linux-amd64'
     alertmanager_config_dir: /opt/am/etc
     alertmanager_db_dir: /opt/am/lib
     alertmanager_web_listen_address: '127.0.0.1:9093'

molecule/alternative/prepare.yml

@@ -2,12 +2,15 @@
 - name: Prepare
   hosts: localhost
   gather_facts: false
+  vars:
+    # Version seeds to be specified here as molecule doesn't have access to ansible_version at this stage
+    version: 0.19.0
   tasks:
     - name: download alertmanager binary to local folder
       become: false
       get_url:
-        url: "https://github.com/prometheus/alertmanager/releases/download/v0.18.0/alertmanager-0.18.0.linux-amd64.tar.gz"
-        dest: "/tmp/alertmanager-0.18.0.linux-amd64.tar.gz"
+        url: "https://github.com/prometheus/alertmanager/releases/download/v{{ version }}/alertmanager-{{ version }}.linux-amd64.tar.gz"
+        dest: "/tmp/alertmanager-{{ version }}.linux-amd64.tar.gz"
       register: _download_archive
       until: _download_archive is succeeded
       retries: 5
@@ -18,8 +21,17 @@
     - name: unpack alertmanager binaries
       become: false
       unarchive:
-        src: "/tmp/alertmanager-0.18.0.linux-amd64.tar.gz"
+        src: "/tmp/alertmanager-{{ version }}.linux-amd64.tar.gz"
         dest: "/tmp"
-        creates: "/tmp/alertmanager-0.18.0.linux-amd64/alertmanager"
+        creates: "/tmp/alertmanager-{{ version }}.linux-amd64/alertmanager"
+      run_once: true
+      check_mode: false
+
+    - name: link to alertmanager binaries directory
+      become: false
+      file:
+        src: "/tmp/alertmanager-{{ version }}.linux-amd64"
+        dest: "/tmp/alertmanager-linux-amd64"
+        state: link
       run_once: true
       check_mode: false