4 files changed, 94 insertions, 0 deletions
diff --git a/roles/docker/README b/roles/docker/README
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+++ b/roles/docker/README
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+Dependencies:
+ - Executed on all nodes. On the storage nodes, the katrin_storage role should be executed before
+ - Unless docker_storage_vg is defined, it will try to detect the first VG with the space available and which is not equal to katrin_data_vg
+
+Parameters:
+ docker_storage_vg / docker_storage_device: Configures VG to use for docker images
+    - If docker_storage_vg is not set it will try to detect the first VG with space available and which is not listed in the 'docker_exclude_vgs'
+    - If such VG is not found, it will create VG on the specified device
+ docker_exclude_vgs: Lists VGs which should not be used to host Docker volumes
+ docker_min_size: Specifies the minimum size requirement of Docker LV
+ docker_volume_size: Adjust the size of Docker LV
+ 
+Facts:
+ - Nope
+
+Actions;
+ - Detects or creates Docker VG and creates inside the 'docker-pool' LV (autogrowing). The initial size may be given with docker_storage_size
+ - Installs docker, configures LVM storage backend, and enables docker service
diff --git a/roles/docker/defaults/main.yml b/roles/docker/defaults/main.yml
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+docker_min_size: 100
+docker_exclude_vgs: "{{ ands_data_vg is defined | ternary( [ ands_data_vg ], [] ) }}"
+docker_lv: "docker-pool"
diff --git a/roles/docker/tasks/main.yml b/roles/docker/tasks/main.yml
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+++ b/roles/docker/tasks/main.yml
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+---
+- name: Ensure docker is installed
+  yum: name="docker" state="present"
+
+- name: start docker
+  service: name="docker" state="started"
+
+- name: Configure bridge-nf-call-iptables with sysctl
+  sysctl: name="net.bridge.bridge-nf-call-iptables"  value=1 state=present sysctl_set=yes
+
+- name: Configure bridge-nf-call-ip6tables with sysctl
+  sysctl: name="net.bridge.bridge-nf-call-ip6tables"  value=1 state=present sysctl_set=yes
+
+- name: Determine if loopback
+  shell: docker info | grep 'Data file:.*loop'
+  register: loop_device_check
+  failed_when: false
+  changed_when: loop_device_check.rc == 0
+
+- debug: msg="{{ loop_device_check.stderr }}"
+  when: loop_device_check.stderr
+
+- include: storage.yml
+  when: loop_device_check.rc == 0
+
+- name: extend the vg
+  lvol: vg="{{ ansible_lvm['lvs'][docker_lv]['vg'] }}" lv="docker_lv" size="{{ docker_volume_size }}"
+  when: docker_volume_size is defined
+
+- name: stop docker
+  service: name="docker" enabled=yes state=started
+  
+\ No newline at end of file
diff --git a/roles/docker/tasks/storage.yml b/roles/docker/tasks/storage.yml
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+++ b/roles/docker/tasks/storage.yml
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+---
+- name: list volume groups
+  set_fact: available_vg="{{ item.key }}"
+  with_dict: "{{ ansible_lvm.vgs }}"
+  when:
+    - not available_vg is defined
+    - not item.key in ( docker_exclude_vgs | default([]) )
+    - (item.value.free_g | int) > (docker_volume_size | default(docker_min_size))
+
+- set_fact: docker_storage_vg="{{ available_vg }}"
+  when: (not docker_storage_vg is defined) and (available_vg is defined)
+
+- fail: msg="Can't detect Docker VG"
+  when: not docker_storage_vg is defined
+
+- name: check to see if {{ docker_storage_device }} exists
+  command: "test -e {{ docker_storage_device }}"
+  when: docker_storage_device is defined
+
+- set_fact: docker_storage_config="VG={{ docker_storage_vg }} AUTO_EXTEND_POOL=true"
+
+- set_fact: docker_storage_config="{{ docker_storage_config }} DEVS={{ docker_storage_device }}"
+  when: ( docker_storage_device is defined ) and ( not ansible_lvm.vgs.{{ docker_storage_vg }} is defined )
+  
+- name: stop docker
+  service: name="docker" state="stopped"
+
+- name: delete /var/lib/docker
+  file: path="/var/lib/docker" state=absent
+
+- name: generate docker-storage-setup config file
+  copy:
+      content: "{{ docker_storage_config }}"
+      dest: /etc/sysconfig/docker-storage-setup
+      owner: root
+      group: root
+      mode: 0664
+
+- name: docker storage setup
+  command: docker-storage-setup
+