From: Alfredo Deza <alfredo.deza@inktank.com>
Date: Tue, 23 Sep 2014 12:54:13 +0000 (-0400)
Subject: create a is_systemd helper
X-Git-Tag: v1.5.16~8^2~7
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=82bd9a2c5303b7c5d54722b100bcfed11d8e3b9c;p=ceph-deploy.git

create a is_systemd helper

Signed-off-by: Alfredo Deza <alfredo.deza@inktank.com>
---

diff --git a/ceph_deploy/util/system.py b/ceph_deploy/util/system.py
index 74e33c2..7665dff 100644
--- a/ceph_deploy/util/system.py
+++ b/ceph_deploy/util/system.py
@@ -1,4 +1,5 @@
 from ceph_deploy.exc import ExecutableNotFound
+from ceph_deploy.lib import remoto
 
 
 def executable_path(conn, executable):
@@ -13,3 +14,45 @@ def executable_path(conn, executable):
     if not executable_path:
         raise ExecutableNotFound(executable, conn.hostname)
     return executable_path
+
+
+def is_systemd(conn):
+    """
+    Attempt to detect if a remote system is a systemd one or not
+    by looking into ``/proc`` just like the ceph init script does::
+
+        # detect systemd
+        # SYSTEMD=0
+        grep -qs systemd /proc/1/comm && SYSTEMD=1
+    """
+    return conn.remote_module.grep(
+        'systemd',
+        '/proc/1/comm'
+    )
+
+
+def enable_service(conn, service='ceph'):
+    """
+    Enable a service on a remote host depending on the type of init system.
+    Obviously, this should be done for RHEL/Fedora/CentOS systems.
+
+    This function does not do any kind of detection.
+    """
+    if is_systemd(conn):
+        remoto.process.run(
+            conn,
+            [
+                'systemctl',
+                'enable',
+                'ceph',
+            ]
+        )
+    else:
+        remoto.process.run(
+            conn,
+            [
+                'chkconfig',
+                'ceph',
+                'on',
+            ]
+        )