docker: fail if systemd is not present

Since we treat containers as services using systemd, systemd is an
absolute requirement.

Signed-off-by: Sébastien Han <seb@redhat.com>

diff --git a/roles/ceph-docker-common/tasks/main.yml b/roles/ceph-docker-common/tasks/main.yml
new file mode 100644 (file)
index 0000000..14e987c
--- /dev/null
+++ b/roles/ceph-docker-common/tasks/main.yml
@@ -0,0 +1,2 @@
+---
+- include: system_checks.yml

diff --git a/roles/ceph-docker-common/tasks/system_checks.yml b/roles/ceph-docker-common/tasks/system_checks.yml
new file mode 100644 (file)
index 0000000..a9a5311
--- /dev/null
+++ b/roles/ceph-docker-common/tasks/system_checks.yml
@@ -0,0 +1,5 @@
+---
+- name: fail if systemd is not present
+  fail:
+    msg: "Systemd must be present"
+  when: ansible_service_mgr != 'systemd'