Merge pull request #6922 from mjudeikis/glusterfs-block-storage

Automatic merge from submit-queue.

Glusterfs block storage ansible support

GlusterBlock support in our ansible for glusterfs role

TODO:

- [ ] checking if only one SC is set default
- [ ] validate if mpath on nodes is configured
- [ ] add check for rhel vs atomic
- [x] make sure rpcbind is running and enabled BEFORE we even start glusterfs pods
- [x] enable mpath 
- [ ] validate kernel module availability

@ckyriakidou
@jarrpa

3 files changed, 43 insertions, 1 deletions

diff --git a/roles/openshift_node/defaults/main.yml b/roles/openshift_node/defaults/main.yml
index 0fe4c2035..9f887891b 100644
--- a/roles/openshift_node/defaults/main.yml
+++ b/roles/openshift_node/defaults/main.yml
@@ -137,6 +137,7 @@ default_r_openshift_node_image_prep_packages:
 - yum-utils
 # gluster
 - glusterfs-fuse
+- device-mapper-multipath
 # nfs
 - nfs-utils
 - flannel
diff --git a/roles/openshift_node/tasks/storage_plugins/iscsi.yml b/roles/openshift_node/tasks/storage_plugins/iscsi.yml
index a8048c42f..72415f9a6 100644
--- a/roles/openshift_node/tasks/storage_plugins/iscsi.yml
+++ b/roles/openshift_node/tasks/storage_plugins/iscsi.yml
@@ -1,6 +1,32 @@
 ---
 - name: Install iSCSI storage plugin dependencies
-  package: name=iscsi-initiator-utils state=present
+  package:
+    name: "{{ item }}"
+    state: present
   when: not openshift_is_atomic | bool
   register: result
   until: result is succeeded
+  with_items:
+    - iscsi-initiator-utils
+    - device-mapper-multipath
+
+- name: restart services
+  systemd:
+    name: "{{ item }}"
+    state: started
+    enabled: True
+  with_items:
+    - multipathd
+    - rpcbind
+
+- name: Template multipath configuration
+  template:
+    dest: "/etc/multipath.conf"
+    src: multipath.conf.j2
+    backup: true
+  when: not openshift_is_atomic | bool
+
+#enable multipath
+- name: Enable multipath
+  command: "mpathconf --enable"
+  when: not openshift_is_atomic | bool
diff --git a/roles/openshift_node/templates/multipath.conf.j2 b/roles/openshift_node/templates/multipath.conf.j2
new file mode 100644
index 000000000..8a0abc2c1
--- /dev/null
+++ b/roles/openshift_node/templates/multipath.conf.j2
@@ -0,0 +1,15 @@
+# LIO iSCSI
+# TODO: Add env variables for tweaking
+devices {
+        device {
+                vendor "LIO-ORG"
+                user_friendly_names "yes" 
+                path_grouping_policy "failover"
+                path_selector "round-robin 0"
+                failback immediate
+                path_checker "tur"
+                prio "const"
+                no_path_retry 120
+                rr_weight "uniform"
+        }
+}