Merge pull request 'Configure maximum size and timespan of journald logs' (#594) from feature/506-journald_logs_config into master

Reviewed-on: #594
Reviewed-by: Râu Cao <raucao@kosmos.org>

nodes/mastodon-3.json

@@ -37,6 +37,7 @@
       "timezone_iii::debian",
       "ntp::default",
       "ntp::apparmor",
+      "kosmos-base::journald_conf",
       "kosmos-base::systemd_emails",
       "apt::unattended-upgrades",
       "kosmos-base::firewall",

site-cookbooks/kosmos-base/attributes/default.rb

@@ -0,0 +1,2 @@
+node.default["kosmos-base"]["journald"]["system_max_use"] = "256M"
+node.default["kosmos-base"]["journald"]["max_retention_sec"] = "7d"

site-cookbooks/kosmos-base/recipes/default.rb

@@ -27,6 +27,7 @@
 include_recipe 'apt'
 include_recipe 'timezone_iii'
 include_recipe 'ntp'
+include_recipe 'kosmos-base::journald_conf'
 include_recipe 'kosmos-base::systemd_emails'
 
 node.override["apt"]["unattended_upgrades"]["allowed_origins"] = [

site-cookbooks/kosmos-base/recipes/journald_conf.rb

@@ -0,0 +1,14 @@
+#
+# Cookbook Name:: kosmos-base
+# Recipe:: journald_conf
+#
+
+service "systemd-journald"
+
+template "/etc/systemd/journald.conf" do
+  source "journald.conf.erb"
+  variables system_max_use: node["kosmos-base"]["journald"]["system_max_use"],
+            max_retention_sec: node["kosmos-base"]["journald"]["max_retention_sec"]
+  # Restarting journald is required
+  notifies :restart, "service[systemd-journald]", :delayed
+end

site-cookbooks/kosmos-base/templates/default/journald.conf.erb

@@ -0,0 +1,6 @@
+[Journal]
+# Set the maximum size of the journal logs in bytes
+SystemMaxUse=<%= @system_max_use %>
+
+# Set the number of days after which logs will be deleted
+MaxRetentionSec=<%= @max_retention_sec %>