fix(riak): adding notes

Author: manuelstein

riak/script/poststart.d/10-join-cluster.sh

@@ -13,10 +13,9 @@
 #   See the License for the specific language governing permissions and
 #   limitations under the License.
 
-# Maybe join to a cluster
-if [[ -z "$($RIAK_ADMIN cluster status | grep $HOSTNAME)" && ${COORDINATOR_NODE} != ${HOSTNAME}* && ${HOSTNAME} != ${COORDINATOR_NODE}* ]]; then
-#if [[ -z "$($RIAK_ADMIN cluster status | grep $COORDINATOR_NODE_HOST)" && ${HOSTNAME} != ${COORDINATOR_NODE}* ]]; then
-  # Not already in this cluster and not the coordinator itself, so join
+# If not coordinator, join it to form a cluster
+# TODO: restart of coordinator node leaves it outside the cluster
+if [[ ${COORDINATOR_NODE} != ${HOSTNAME}* && ${HOSTNAME} != ${COORDINATOR_NODE}* ]]; then
   echo "Connecting to cluster coordinator $COORDINATOR_NODE"
   curl -s http://$COORDINATOR_NODE:$RK_MFN1_SERVICE_PORT_HTTP >/dev/null
   $RIAK_ADMIN cluster join riak@$COORDINATOR_NODE