add cron job

defaults/main.yml

@@ -31,3 +31,7 @@ beacon_node_restart_window_sec: 120
 
 # general container management
 compose_recreate: false
+
+# shared testnet cron job
+beacon_node_shared_testnet_cron: false
+

tasks/cron.yml

@@ -0,0 +1,11 @@
+---
+# "cron.name" should not be changed, or a new cron job will be created for the new name,
+# in addition to the old one.
+- name: "Shared testnet: periodic container restart Cron job"
+  cron:
+    name: "shared testnet restart"
+    minute: "10"
+    hour: "0,6,12,18"
+    job: "PATH='/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin'; cd {{ beacon_node_cont_vol }}; docker-compose --compatibility run --rm --name {{ beacon_node_cont_name }}-build-run beacon_node --build; docker-compose restart -t 60"
+  when: beacon_node_shared_testnet_cron
+

tasks/main.yml

@@ -2,5 +2,6 @@
 - import_tasks: install.yml
 - import_tasks: compose.yml
 - import_tasks: container.yml
+- import_tasks: cron.yml
 - import_tasks: firewall.yml
 - import_tasks: consul.yml