osmocom-jenkins-slave: call fstrim periodically

Change-Id: I82c497f476abf43148e8d7c027f53b87b5a738fb

ansible/hosts

@@ -9,8 +9,8 @@ host2-deb9build-ansible ansible_host=2a01:4f8:120:8470::1:3
 
 [jenkins-slaves]
 admin2-deb8build ansible_host=2a01:4f8:13b:828::1:400
-admin2-deb9build ansible_host=2a01:4f8:13b:828::1:300
+admin2-deb9build ansible_host=2a01:4f8:13b:828::1:300 osmocom_jenkins_slave_fstrim=True
 build2-deb8build-ansible ansible_host=2a01:4f8:10b:2ad9::1:7
-build2-deb9build-ansible ansible_host=2a01:4f8:10b:2ad9::1:6
+build2-deb9build-ansible ansible_host=2a01:4f8:10b:2ad9::1:6 osmocom_jenkins_slave_fstrim=True
 host2-deb8build-ansible ansible_host=2a01:4f8:120:8470::1:2
-host2-deb9build-ansible ansible_host=2a01:4f8:120:8470::1:3
+host2-deb9build-ansible ansible_host=2a01:4f8:120:8470::1:3 osmocom_jenkins_slave_fstrim=True

ansible/roles/osmocom-jenkins-slave/defaults/main.yml

@@ -9,3 +9,6 @@ generic_slave: true
 
 # Setup the ttcn3 requirements
 ttcn3_slave: true
+
+# call fstrim peridically
+osmocom_jenkins_slave_fstrim: false

ansible/roles/osmocom-jenkins-slave/tasks/main.yml

@@ -109,3 +109,10 @@
   copy:
     src: gitconfig
     dest: "/home/{{ jenkins_user }}/.gitconfig"
+
+- name: call fstrim periodically
+  cron:
+    name: "fstrim"
+    hour: "*/12"
+    job: "fstrim / >/dev/null 2>/dev/null || true"
+  when: osmocom_jenkins_slave_fstrim