First pass at STONITH support.

hooks/hooks.py

@@ -293,6 +293,37 @@ def configure_cluster():
             cmd = 'crm resource cleanup %s' % res_name
             pcmk.commit(cmd)
 
+    if utils.config_get('stonith_enabled') in ['true', 'True']:
+        utils.juju_log('INFO', 'Configuring STONITH for all nodes in cluster.')
+        # configure stontih resources for all nodes in cluster.
+        # note: this is totally provider dependent and requires
+        # access to the MAAS API endpoint, using endpoint and credentials
+        # set in config.
+        url = utils.config_get('maas_url')
+        creds = utils.config_get('maas_credentials')
+        if None in [url, creds]:
+            utils.juju_log('ERROR', 'maas_url and maas_credentials must be set'\
+                           ' in config to enable STONITH.')
+        maas = maas.MAASHelper(url, creds)
+        nodes = maas.list_nodes()
+        if not nodes:
+            utils.juju_log('ERROR', 'Could not obtain node inventory from '\
+                           'MAAS @ %s.' % url)
+            sys.exit(1)
+
+        hosts = get_cluster_nodes()
+        for host in hosts:
+            rsc, constraint = pcmk.maas_stonith_primitive(nodes, host)
+            if not rsc:
+                utils.juju_log('ERROR',
+                               'Failed to determine STONITH primitive for node'\
+                               ' %s' % host)
+            cmd = 'crm -F configure %s' % rsc
+            pcmk.commit(cmd)
+            if constraint:
+                cmd = 'crm -F configure %s' % constraint
+                pcmk.commit(cmd)
+
     for rel_id in utils.relation_ids('ha'):
         utils.relation_set(rid=rel_id,
                            clustered="yes")