Merge branch 'docker-lvm' into 'master'

Docker lvm

See merge request fablab/labsync!20

packer/ansible/roles/docker/files/docker-override.conf

@@ -0,0 +1,2 @@
+[Service]
+ExecStartPre=/usr/local/sbin/docker-setup.sh

packer/ansible/roles/docker/files/docker-setup.sh

@@ -0,0 +1,49 @@
+#!/bin/sh
+
+vg='vglab'
+
+if ! lvs -o layout --noheadings $vg/docker-thinpool | grep -q 'thin,pool'; then
+
+	if ! lvs -o LV_NAME --noheadings | grep -q docker-thinpool; then
+		lvcreate --wipesignatures y -n docker-thinpool "$vg" -l 10%VG
+	fi
+
+	if ! lvs -o LV_NAME --noheadings | grep -q docker-thinpoolmeta; then
+		lvcreate --wipesignatures y -n docker-thinpoolmeta "$vg" -l 1%VG
+	fi
+
+	lvconvert -y \
+		--zero n \
+		-c 512K \
+		--thinpool "$vg/docker-thinpool" \
+		--poolmetadata "$vg/docker-thinpoolmeta"
+fi
+
+if ! [ -f /etc/lvm/profile/docker-thinpool.profile ]; then
+	[ -d /etc/lvm/profile ] || mkdir /etc/lvm/profile
+	cat > /etc/lvm/profile/docker-thinpool.profile << EOF
+activation {
+  thin_pool_autoextend_threshold=80
+  thin_pool_autoextend_percent=20
+}
+EOF
+	lvchange --metadataprofile docker-thinpool "$vg/docker-thinpool"
+	lvs -o+seg_monitor
+fi
+
+lv_path="${vg}-docker--thinpool"
+
+if ! [ -d /etc/docker ]; then
+	mkdir /etc/docker
+fi
+cat > /etc/docker/daemon.json << EOF
+{
+    "storage-driver": "devicemapper",
+    "storage-opts": [
+    "dm.thinpooldev=$lv_path",
+    "dm.use_deferred_removal=true",
+    "dm.use_deferred_deletion=true"
+    ]
+}
+EOF
+

packer/ansible/roles/docker/tasks/lvm-setup-service.yml

@@ -0,0 +1,29 @@
+---
+- name: install tools for lvm thin pools
+  package:
+    name: thin-provisioning-tools
+
+- name: copy docker-setup script
+  copy:
+    src: docker-setup.sh
+    dest: /usr/local/sbin/docker-setup.sh
+    owner: root
+    group: root
+    mode: "0744"
+
+- name: create override directory for docker service unit
+  file:
+    path: /etc/systemd/system/docker.service.d
+    state: directory
+    mode: "0755"
+    owner: root
+    group: root
+
+- name: copy systemd unit override for docker service
+  copy:
+    src: docker-override.conf
+    dest: /etc/systemd/system/docker.service.d/override.conf
+    owner: root
+    group: root
+    mode: "0644"
+

packer/ansible/roles/docker/tasks/main.yml

@@ -2,3 +2,7 @@
 - import_tasks: packages.yml
   tags:
     - docker:packages
+
+- import_tasks: lvm-setup-service.yml
+  tags:
+    - docker:lvm-setup-service