fcos-podman: Set max size for logging to 50m

By default podman containers can write unlimited bytes
of log and evenrually fill up the disk nodes.

Set the max size per containers to 50MB.

story: 2007402
task: 39001

Change-Id: I155b7146b7175d95b219897b84f4580091e5975e
Signed-off-by: Spyros Trigazis <strigazi@gmail.com>

magnum/drivers/k8s_fedora_coreos_v1/templates/fcct-config.yaml

@@ -35,6 +35,19 @@ storage:
       group:
         name: root
   files:
+    - path: /etc/containers/libpod.conf
+      # 420 (decimal) == 644 (octal)
+      mode: 420
+      user:
+        name: root
+      group:
+        name: root
+      contents:
+        inline: |
+          # Maximum size of log files (in bytes)
+          # -1 is unlimited
+          # 50m
+          max_log_size = 52428800
     - path: /etc/hostname
       # 420 (decimal) == 644 (octal)
       mode: 420

magnum/drivers/k8s_fedora_coreos_v1/templates/user_data.json

@@ -46,6 +46,20 @@
       }
     ],
     "files": [
+      {
+        "group": {
+          "name": "root"
+        },
+        "path": "/etc/containers/libpod.conf",
+        "user": {
+          "name": "root"
+        },
+        "contents": {
+          "source": "data:,%23%20Maximum%20size%20of%20log%20files%20(in%20bytes)%0A%23%20-1%20is%20unlimited%0A%23%2050m%0Amax_log_size%20%3D%2052428800%0A",
+          "verification": {}
+        },
+        "mode": 420
+      },
       {
         "group": {
           "name": "root"