Update install-docker-centos6-beegfs.md

install-docker-centos6-beegfs.md

@@ -1,30 +1,33 @@
 # Installing Docker on CentOS 6.x cluster with BeeGFS
 
-Last supported docker for CentOS 6.x is docker 1.7 which doesn't support BeeGFS as a backing file-system. And if the local disk of compute nodes is small, the solution will be creating ext4 images on beegfs.
-* Assuming the shared file-system ``/work``, as root:
-```bash
-mkdir /work/docker
+Last supported docker for CentOS 6.x is docker 1.7 which doesn't support BeeGFS as a backing file-system. And if the local disk of compute nodes is small, the solution will be creating ext4 images on beegfs. The following must run as root:
 
-# Then Create a 120 GiB ext4 image for each docker compute node, then on each compute node:
+* Assuming the shared file-system for shared images is ``/work/docker``, Create a 120 GiB ext4 image for each docker compute node, then on each compute node:
+```bash
 mkdir /docker
 mount -o loop /work/docker/<node-name>.ext4 /docker
-
-# Now install docker 1.7 (don't follow the instructions from docker.com because CentOS 6 is not there):
+```
+* Now install docker 1.7 (don't follow the instructions from docker.com because CentOS 6 is not there):
+```bash
 yum install docker-io -y
-
-# Tell docker to use /docker to store containers
+```
+* Tell docker to use /docker to store containers
+```bash
 vim /etc/sysconfig/docker
 # >> set other_args=-g /docker
-
-# If docker complained, do the following instead:
+```
+* If docker complained, do the following instead:
+```bash
 mv /var/lib/docker /docker/
 ln -s /docker/docker /var/lib/docker
-
-# Create the docker group and add the dockerroot user to it:
+```
+* Create the docker group and add the dockerroot user to it:
+```bash
 groupadd docker
 usermod -aG docker dockerroot
-
-# Start docker service and configure it to start on boot
+```
+* Start docker service and configure it to start on boot
+```bash
 service docker start
 chkconfig docker on
 ```