Support docker overlay storage driver
This is configured via docker_storage_driver.
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commit
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@ -1,4 +1,8 @@
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---
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# Name of the docker storage driver. Supported values include 'devicemapper'
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# and 'overlay'.
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docker_storage_driver: devicemapper
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# Name of the docker storage LVM volume group.
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docker_storage_volume_group:
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@ -1,4 +1,11 @@
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---
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- name: Fail when the storage driver is invalid
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fail:
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msg: >
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Storage driver {{ docker_storage_driver }} is invalid. Valid drivers
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include 'devicemapper' and 'overlay'.
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when: docker_storage_driver not in ['devicemapper', 'overlay']
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- name: Ensure user is in the docker group
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user:
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name: "{{ ansible_user_id }}"
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@ -40,8 +47,8 @@
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- name: Fail when loopback-mode containers or images exist
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fail:
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msg: >
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Not configuring docker storage in direct-lvm mode as loopback-backed
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containers or images exist.
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Not configuring docker storage in {{ docker_storage_driver }} mode as
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loopback-backed containers or images exist.
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when:
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- "{{ 'Data loop file' in docker_info.stdout }}"
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- "{{ 'Images: 0' not in docker_info.stdout }}"
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@ -16,7 +16,8 @@
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- "/var/lib/docker/containers"
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become: True
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- name: Ensure the docker storage data and metadata volumes exist
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- block:
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- name: Ensure the docker storage data and metadata volumes exist
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lvol:
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vg: "{{ docker_storage_volume_group }}"
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lv: "{{ item.name }}"
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@ -30,21 +31,22 @@
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size: "{{ docker_storage_volume_thinpool_meta_size }}"
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become: True
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- name: Ensure the docker storage volume is converted to a thinpool
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- name: Ensure the docker storage volume is converted to a thinpool
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command: >
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lvconvert -y --zero n -c 512K
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--thinpool {{ docker_storage_volume_group }}/{{ docker_storage_volume_thinpool }}
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--poolmetadata {{ docker_storage_volume_group }}/{{ docker_storage_volume_thinpool_meta }}
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become: True
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- name: Ensure the docker storage metadata profile exists
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- name: Ensure the docker storage metadata profile exists
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template:
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src: docker-thinpool.profile.j2
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dest: /etc/lvm/profile/docker-thinpool.profile
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become: True
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- name: Ensure the docker storage metadata profile is applied
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- name: Ensure the docker storage metadata profile is applied
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command: >
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lvchange --metadataprofile docker-thinpool
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{{ docker_storage_volume_group }}/{{ docker_storage_volume_thinpool }}
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become: True
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when: docker_storage_driver == 'devicemapper'
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@ -1,11 +1,13 @@
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{
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"storage-driver": "devicemapper",
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"storage-driver": "{% if docker_storage_driver == 'devicemapper' %}devicemapper{% else %}overlay{% endif %}",
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{% if docker_daemon_mtu %}
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"mtu": {{ docker_daemon_mtu }},
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{% endif %}
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"storage-opts": [
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{% if docker_storage_driver == 'devicemapper' %}
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"dm.thinpooldev=/dev/mapper/{{ docker_storage_volume_group | replace('-', '--') }}-{{ docker_storage_volume_thinpool | replace('-', '--') }}",
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"dm.use_deferred_removal=true",
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"dm.use_deferred_deletion=true"
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{% endif %}
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]
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}
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@ -2,6 +2,10 @@
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###############################################################################
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# Docker configuration.
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# Name of the docker storage driver. Supported values include 'devicemapper'
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# and 'overlay'.
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#docker_storage_driver:
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# Name of the docker storage LVM volume group.
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#docker_storage_volume_group:
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