feat: configure Terraform auto update interval

Terraform auto update interval can be configured by setting "stackhead__tf_update_interval" in inventory file
or "terraform.update_interval" in CLI config file.
Per default updates will be performed every 5 minutes.

Author: saitho

Documentation/ansible-playbooks/inventory.md

@@ -24,6 +24,7 @@ all:
       stackhead__container: getstackhead.stackhead_container_docker # use Docker for containers
       stackhead__plugins: [] # list of plugins
       stackhead__tf_update_realtime: yes # if "no" Terraform updates will be performed via cron (every 5 minutes)
+      stackhead__tf_update_interval: *:0/5 # Terraform auto-update interval, default: 5 minutes
       ansible_host: 123.456.789.10
       stackhead:
         applications:

Documentation/stackhead-cli/cli-configuration.md

@@ -18,6 +18,8 @@ modules:
   container: docker
   plugins:
     - watchtower # load getstackhead.stackhead_plugin_watchtower plugin
+terraform:
+  update_interval: "*-*-* 4:00:00" # perform Terraform update everyday at 4am, see Unix timer "OnCalendar" setting
 config:
   setup:
     getstackhead.stackhead_webserver_nginx: # config settings for Nginx module

ansible/roles/stackhead_setup/tasks/setup-terraform.yml

@@ -42,6 +42,5 @@
           state: "started"
           options:
             Unit: "stackhead-apply-terraform.service"
-            OnActiveSec: 1sec
-            OnUnitActiveSec: 5min
+            OnCalendar: "{{ stackhead_config.terraform.update_interval }}"
             Persistent: true

ansible/vars/internal.yml

@@ -21,6 +21,7 @@ stackhead_config:
     installed: "{% if 'versions' in ansible_local %}{{ ansible_local.versions.stackhead.version }}{% endif %}"
   terraform:
     manual_update: "{{ stackhead__tf_update_realtime|d(true)|bool }}"
+    update_interval: "{{ stackhead__tf_update_interval|d('*:0/5') }}"
   deployment: "{{ stackhead__config_deployment|d({}) }}"
   setup: "{{ stackhead__config_setup|d({}) }}"
   destroy: "{{ stackhead__config_destroy|d({}) }}"