role: added docker_storage_setup

roles/docker_storage/tasks/main.yml

@@ -15,7 +15,7 @@
     vg: "{{ dst_vg }}"
     size: 5%VG
   register: dst_lvol_metadata
-  
+
 
 - name: Update docker_storage options
   lineinfile:
@@ -31,7 +31,7 @@
   command: systemctl daemon-reload
   notify:
   - restart docker
-  when: dst_config | changed or 
+  when: dst_config | changed or
         dst_lvg | changed or
         dst_lvol_data | changed or
         dst_lvol_metadata | changed

roles/docker_storage_setup/README.md

@@ -0,0 +1,42 @@
+docker_storage_setup
+=========
+This role coverts docker to go from loopback to direct-lvm (the Red Hat recommended way to run docker).
+
+It requires the block device to be already provisioned and attached to the host.
+
+  Notes:
+  * This is NOT idempotent. Conversion needs to be done for it to be idempotent
+  * This will remove /var/lib/docker!
+  * You will need to re-deploy docker images
+
+Configure docker_storage_setup
+------------
+
+None
+
+Role Variables
+--------------
+
+dss_docker_device: defaults to /dev/xvdb
+
+Dependencies
+------------
+
+None
+
+Example Playbook
+----------------
+
+    - hosts: servers
+      roles:
+         - { role/docker_storage_setup, dss_docker_device: '/dev/xvdb' }
+
+License
+-------
+
+ASL 2.0
+
+Author Information
+------------------
+
+OpenShift operations, Red Hat, Inc

roles/docker_storage_setup/defaults/main.yml

@@ -0,0 +1,2 @@
+---
+dss_docker_device: /dev/xvdb

roles/docker_storage_setup/tasks/main.yml

@@ -0,0 +1,82 @@
+---
+- name: Ensure docker is installed
+  action: "{{ ansible_pkg_mgr }} name={{ item }} state=present"
+  with_items:
+  - docker
+
+- name: start docker
+  service:
+    name: docker
+    state: started
+
+- name: Determine if loopback
+  shell: docker info | grep 'Data file:.*loop'
+  register: loop_device_check
+  ignore_errors: yes
+
+- debug:
+    var: loop_device_check
+
+- name: fail if we don't detect loopback
+  fail:
+    msg:  loopback not detected! Please investigate manually.
+  when: loop_device_check.rc == 1
+
+- name: "check to see if {{ dss_docker_device }} exists"
+  command: "test -e {{ dss_docker_device }}"
+  register: docker_dev_check
+  ignore_errors: yes
+
+- debug: var=docker_dev_check
+
+- name: "fail if {{ dss_docker_device }} doesn't exist"
+  fail:
+    msg: "{{ dss_docker_device }} doesn't exist. Please investigate"
+  when: docker_dev_check.rc != 0
+
+- name: stop docker
+  service:
+    name: docker
+    state: stopped
+
+- name: delete /var/lib/docker
+  command: rm -rf /var/lib/docker
+
+- name: remove /var/lib/docker
+  command: rm -rf /var/lib/docker
+
+- name: copy the docker-storage-setup config file
+  copy:
+    content: >
+      DEVS={{ dss_docker_device }}\n
+      VG=docker_vg
+    dest: /etc/sysconfig/docker-storage-setup
+    owner: root
+    group: root
+    mode: 0664
+
+- name: docker storage setup
+  command: docker-storage-setup
+  register: docker_storage_setup_output
+
+- debug:
+    msg:  "{{ docker_storage_setup_output }}"
+
+- name: extend the vg
+  command: lvextend -l 90%VG /dev/docker_vg/docker-pool
+  register: lvextend_output
+
+- debug:
+    msg: "{{ lvextend_output }}"
+
+- name: start docker
+  service:
+    name: docker
+    state: restarted
+
+- name: docker info
+  command: docker info
+  register: dockerinfo
+
+- debug:
+    msg: "{{ dockerinfo }}"