Add crontabs only when cron package is installed (many roles)

elasticsearch/tasks/logs.yml

@@ -1,5 +1,11 @@
 ---
 
+- name: Check if cron is installed
+  shell: "dpkg -l cron 2> /dev/null | grep -q -E '^(i|h)i'"
+  failed_when: False
+  changed_when: False
+  register: is_cron_installed
+
 - name: "log rotation script"
   template:
     src: rotate_elasticsearch_logs.j2
@@ -7,3 +13,4 @@
     owner: root
     group: root
     mode: "0750"
+  when: is_cron_installed.rc == 0

etc-git/tasks/main.yml

@@ -82,12 +82,20 @@
   tags:
     - etc-git
 
+- name: Check if cron is installed
+  shell: "dpkg -l cron 2> /dev/null | grep -q -E '^(i|h)i'"
+  failed_when: False
+  changed_when: False
+  check_mode: no
+  register: is_cron_installed
+
 - name: Optimize script is installed in monthly crontab
   copy:
     src: optimize-etc-git
     dest: /etc/cron.monthly/optimize-etc-git
     mode: "0750"
     force: no
+  when: is_cron_installed.rc == 0
   tags:
     - etc-git
 
@@ -96,7 +104,7 @@
     src: etc-git-status.j2
     dest: /etc/cron.d/etc-git-status
     mode: "0644"
-  when: etc_git_monitor_status
+  when: is_cron_installed.rc == 0 and etc_git_monitor_status
   tags:
     - etc-git
 
@@ -104,6 +112,6 @@
   file:
     dest: /etc/cron.d/etc-git-status
     state: absent
-  when: not etc_git_monitor_status
+  when: is_cron_installed.rc == 0 and not etc_git_monitor_status
   tags:
     - etc-git

evocheck/tasks/cron.yml

@@ -1,5 +1,12 @@
 ---
 
+- name: Check if cron is installed
+  shell: "dpkg -l cron 2> /dev/null | grep -q -E '^(i|h)i'"
+  failed_when: False
+  changed_when: False
+  check_mode: no
+  register: is_cron_installed
+
 - name: evocheck crontab is updated
   template:
     src: crontab.j2
@@ -8,3 +15,4 @@
     owner: root
     group: root
     force: yes
+  when: is_cron_installed.rc == 0

evolinux-base/tasks/system.yml

@@ -84,13 +84,20 @@
 
 #- name: Customizing /etc/fstab
 
+- name: Check if cron is installed
+  shell: "dpkg -l cron 2> /dev/null | grep -q -E '^(i|h)i'"
+  failed_when: False
+  changed_when: False
+  check_mode: no
+  register: is_cron_installed
+
 - name: Set verbose logging for cron deamon
   lineinfile:
     dest: /etc/default/cron
     line: "EXTRA_OPTS='-L 15'"
     create: yes
     state: present
-  when: evolinux_system_cron_verboselog
+  when: is_cron_installed.rc == 0 and evolinux_system_cron_verboselog
 
 - name: Modify default umask for cron deamon
   lineinfile:
@@ -98,7 +105,7 @@
     line: "umask 022"
     create: yes
     state: present
-  when: evolinux_system_cron_umask
+  when: is_cron_installed.rc == 0 and evolinux_system_cron_umask
 
 - name: Randomize periodic crontabs
   replace:
@@ -110,7 +117,7 @@
   - { regexp: '^25\s*6((\s*\*){3})',     replace: '{{ 59|random(start=1) }} {{ [0,1,3,4,5,6,7]|random }}\1' }
   - { regexp: '^47\s*6((\s*\*){2}\s*7)', replace: '{{ 59|random(start=1) }} {{ [0,1,3,4,5,6,7]|random }}\1' }
   - { regexp: '^52\s*6(\s*1(\s*\*){2})', replace: '{{ 59|random(start=1) }} {{ [0,1,3,4,5,6,7]|random }}\1' }
-  when: evolinux_system_cron_random
+  when: is_cron_installed.rc == 0 and evolinux_system_cron_random
 
 - include_role:
     name: ntpd

logstash/tasks/logs.yml

@@ -1,5 +1,10 @@
 ---
-
+- name: Check if cron is installed
+  shell: "dpkg -l cron 2> /dev/null | grep -q -E '^(i|h)i'"
+  failed_when: False
+  changed_when: False
+  register: is_cron_installed
+  
 - name: "log rotation script"
   template:
     src: rotate_logstash_logs.j2
@@ -7,3 +12,4 @@
     owner: root
     group: root
     mode: "0750"
+  when: is_cron_installed.rc == 0

postfix/tasks/packmail.yml

@@ -100,6 +100,12 @@
   tags:
   - postfix
 
+- name: Check if cron is installed
+  shell: "dpkg -l cron 2> /dev/null | grep -q -E '^(i|h)i'"
+  failed_when: False
+  changed_when: False
+  register: is_cron_installed
+
 - name: enable spam.sh cron
   lineinfile:
     dest: /etc/cron.d/spam
@@ -107,6 +113,7 @@
     create: yes
     state: present
     mode: "0640"
+  when: is_cron_installed.rc == 0
   tags:
   - postfix
 

spamassasin/tasks/main.yml

@@ -56,6 +56,12 @@
   tags:
     - spamassassin
 
+- name: Check if cron is installed
+  shell: "dpkg -l cron 2> /dev/null | grep -q -E '^(i|h)i'"
+  failed_when: False
+  changed_when: False
+  register: is_cron_installed
+  
 - name: enable sa-update.sh cron
   lineinfile:
     dest: /etc/cron.d/sa-update
@@ -63,6 +69,7 @@
     create: yes
     state: present
     mode: "0640"
+  when: is_cron_installed.rc == 0
   tags:
     - spamassassin