nimbus.prater: add 16 GB SWAP file, no SWAP partition

There were OOM killer logs on `linux-06` due to Erigon.

Signed-off-by: Jakub Sokołowski <jakub@status.im>

ansible/group_vars/ih-eu-mda1.yml

@@ -7,6 +7,10 @@ bootstrap__extra_volume_bind_paths:
   DATA_VOLUME1: ['/data']
   DATA_VOLUME2: ['/docker']
 
+# SWAP
+swap_file_path: '/main.swap'
+swap_file_size_mb: 16384
+
 # SMART Metrics are broken
 # https://github.com/prometheus-community/smartctl_exporter/issues/26
 smart_metrics_consul_check_enabled: false

ansible/prater.yml

@@ -34,6 +34,7 @@
   serial: '{{ serial|default(1) }}'
   hosts: nimbus-prater-metal
   roles:
+    - { role: swap-file,         tags: [ swap-file ]        }
     - { role: open-ports,        tags: [ open-ports ]       }
     - { role: smart-metrics,     tags: [ smart-metrics ]    }
     - { role: redirect-ports,    tags: [ redirect-ports ]   }