deploy: add volume mounts for /sys/class and /sys/module

gluster-block (or rather tcmu-runner) uses /sys/class/uio to create new
/dev/uioN devices. For this, it needs write access to /sys/class. The
actual /sys/class/uio only exists after the kernel modules are loaded,
which can happen during starting of the services in the glusterfs-server
container. Therefor it is not possible to bind-mount /sys/class/uio
only.

In addition to /sys/class/uio, tcmu-runner toggles kernel parameters
through writing to /sys/module/target_core_user/parameters/* files. This
path is also only available once the target_core_user kernel module is
loaded, which can be done during runtime. /sys/module is the only path
that is guaranteed to be available when the container starts.

See-also: https://bugzilla.redhat.com/1653571
Signed-off-by: Niels de Vos <ndevos@redhat.com>

Author: nixpanic

deploy/kube-templates/glusterfs-daemonset.yaml

@@ -56,6 +56,10 @@ spec:
           mountPath: "/mnt/host-dev"
         - name: glusterfs-misc
           mountPath: "/var/lib/misc/glusterfsd"
+        - name: glusterfs-block-sys-class
+          mountPath: "/sys/class"
+        - name: glusterfs-block-sys-module
+          mountPath: "/sys/module"
         - name: glusterfs-cgroup
           mountPath: "/sys/fs/cgroup"
           readOnly: true
@@ -113,6 +117,12 @@ spec:
       - name: glusterfs-misc
         hostPath:
           path: "/var/lib/misc/glusterfsd"
+      - name: glusterfs-block-sys-class
+        hostPath:
+          path: "/sys/class"
+      - name: glusterfs-block-sys-module
+        hostPath:
+          path: "/sys/module"
       - name: glusterfs-cgroup
         hostPath:
           path: "/sys/fs/cgroup"

deploy/ocp-templates/glusterfs-template.yaml

@@ -66,6 +66,10 @@ objects:
             mountPath: "${HOST_DEV_DIR}"
           - name: glusterfs-misc
             mountPath: "/var/lib/misc/glusterfsd"
+          - name: glusterfs-block-sys-class
+            mountPath: "/sys/class"
+          - name: glusterfs-block-sys-module
+            mountPath: "/sys/module"
           - name: glusterfs-cgroup
             mountPath: "/sys/fs/cgroup"
             readOnly: true
@@ -125,6 +129,12 @@ objects:
         - name: glusterfs-misc
           hostPath:
             path: "/var/lib/misc/glusterfsd"
+        - name: glusterfs-block-sys-class
+          hostPath:
+            path: "/sys/class"
+        - name: glusterfs-block-sys-module
+          hostPath:
+            path: "/sys/module"
         - name: glusterfs-cgroup
           hostPath:
             path: "/sys/fs/cgroup"