Set mfn up for using bash expressions in cron.

tasks/miner/acct_mgmt/users.yml

@@ -19,4 +19,5 @@
       - video
       - render
     append: yes
+    shell: "{{ bash_exec.stdout }}"
   register: user_mfn

tasks/miner/cron/ansible.yml

@@ -26,7 +26,7 @@
     user: mfn
     name: "Start {{ item.name }}"
     minute: "*/5"
-    job: "ps -ef | grep '{{ item.command }}' | grep -v 'grep' && {{ item.command }}"
+    job: "[[ ps -ef | grep -v 'grep'| grep -c '{{ item.command }}' == '0' ]] && {{ item.command }}"
     state: present
     disabled: "{{ not(item.enabled) }}"
   loop: "{{ miners }}"