Support for using external Ceph clusters

This patch adds support for using an externally managed Ceph
cluster with the TripleO Heat templates.

For an externally managed Ceph cluster we initially
only deploy the Ceph client tools, install the 'openstack' user
keyring, and generate the ceph.conf. This matches what we do
for managed Ceph installations and is a good first start.
No other Ceph related services are installed or managed.

To enable use of a Ceph external cluster simply add
the custom Heat environment file environments/puppet-ceph-external.yaml
to your heat stack create/update command and make sure to
set the required CephClientKey, CephExternalMonHost, and CephClusterFSID
variables.

Change-Id: I0a8b213ce9dfa2fc4e62ae1e7631466e5179fc2b

1 files changed, 18 insertions, 0 deletions

diff --git a/environments/puppet-ceph-external.yaml b/environments/puppet-ceph-external.yaml
new file mode 100644
index 00000000..3c7901cc
--- /dev/null
+++ b/environments/puppet-ceph-external.yaml
@@ -0,0 +1,18 @@
+# A Heat environment file which can be used to enable the
+# use of an externally managed Ceph cluster.
+resource_registry:
+  OS::TripleO::CephClusterConfig::SoftwareConfig: ../puppet/extraconfig/ceph/ceph-external-config.yaml
+
+parameters:
+  # NOTE: These example parameters are required when using Ceph External
+  #CephClusterFSID: '4b5c8c0a-ff60-454b-a1b4-9747aa737d19'
+  #CephClientKey: 'AQDLOh1VgEp6FRAAFzT7Zw+Y9V6JJExQAsRnRQ=='
+  #CephExternalMonHost: '172.16.1.7, 172.16.1.8'
+
+  # the following parameters enable Ceph backends for Cinder, Glance, and Nova
+  NovaEnableRbdBackend: true
+  CinderEnableRbdBackend: true
+  GlanceBackend: rbd
+
+  # finally we disable the Cinder LVM backend
+  CinderEnableIscsiBackend: false