Configure journald size limits

Closes: #575

ansible/roles/configure/handlers/main.yml

+---
+- name: restart-journald
+  service:
+    name: systemd-journald
+    state: restarted

ansible/roles/configure/tasks/journald.yml

+---
+
+- name: Ensure journald directories
+  file:
+    path: '{{ item }}'
+    state: directory
+  with_items:
+    - /var/log/journal
+    - /etc/systemd/journald.conf.d
+
+- name: Configure journald size limits
+  template:
+    dest: /etc/systemd/journald.conf.d/size-limits.conf
+    src: journald.conf
+  notify: restart-journald

ansible/roles/configure/tasks/main.yml

 ---
 
+- name: Configure journald
+  import_tasks: journald.yml
+
 - name: Update apt packages cache and install needed packages
   # apt-transport-https is needed for docker apt repo
   # curl and git is needed for helm plugin install

ansible/roles/configure/templates/journald.conf

+# https://www.freedesktop.org/software/systemd/man/journald.conf.html
+[Journal]
+Storage=persistent
+SystemMaxUse=400M
+SystemMaxFileSize=30M
+RuntimeMaxUse=250M
+RuntimeMaxFileSize=30M