Added experimental kvm-guest role

Can handle adding volumes with DRBD over LVM and provision new
virtual machines using these volumes.

kvm-guest/handlers/main.yml

@@ -0,0 +1,19 @@
+- name: 'primary DRBD was changed'
+  command: 'drbdadm adjust all'
+  delegate_to: "{{ kvm-guest__primary }}"
+
+- name: 'secondary DRBD was changed'
+  command: 'drbdadm adjust all'
+  delegate_to: "{{ kvm-guest__secondary }}"
+
+- name: 'new primary DRBD'
+  command: ""drbdadm create-md '{{ kvm-guest__name }}'""
+  delegate_to "{{ kvm-guest__primary }}"
+  listen: 'primary DRBD was changed'
+  when: kvm-guest__drbd_primary_ressource.stat.exists == False
+
+- name: 'new secondary DRBD'
+  command: ""drbdadm create-md '{{ kvm-guest__name }}'""
+  delegate_to "{{ kvm-guest__secondary }}"
+  listen: 'secondary DRBD was changed'
+  when: kvm-guest__drbd_secondary_ressource.stat.exists == False

kvm-guest/tasks/llvm_over_drbd.yml

@@ -0,0 +1,60 @@
+---
+
+- name: "create logical volumes for {{ kvm-guest__name }} on kvm cloud"
+  block:
+    - name: "create logical volumes on {{ kvm-guest__primary }}"
+      lvol:
+        vg: "{{ item.group }}"'
+        lv: "{{ item.name }}"
+        size: "{{ item.size }}"
+      with_items: "{{ kvm-guest__volumes }}"
+      delegate_to: "{{ kvm-guest__primary }}"
+
+    - name: 'create logical volumes on {{ kvm-guest__secondary }}"'
+      lvol:
+        vg: "{{ item.group }}"'
+        lv: "{{ item.name }}"
+        size: "{{ item.size }}"
+      with_items: "{{ kvm-guest__volumes }}"
+      delegate_to: "{{ kvm-guest__secondary }}"
+
+- name: "create DRBD ressources for {{ kvm-guest__name }} on kvm cloud"
+  block:
+    - name: "check if DRBD ressource definition on {{ kvm-guest__primary }} exists"
+      stat: 
+        path: "/etc/drbd.d/{{ kvm-guest__name }}.res"
+      delegate_to: "{{ kvm-guest__primary }}"
+      register: kvm-guest__drbd_primary_ressource
+
+    - name: "check if DRBD ressource definition on {{ kvm-guest__secondary }} exists"
+      stat: 
+        path: "/etc/drbd.d/{{ kvm-guest__name }}.res"
+      delegate_to: "{{ kvm-guest__secondary }}"
+      register: kvm-guest__drbd_secondary_ressource
+
+    - name: "update DRBD ressource definition on {{ kvm-guest__primary }}"
+      template:
+        src: 'drbd_vm.res.j2'
+        dest: "/etc/drbd.d/{{ kvm-guest__name }}.res"
+        validate: 'drbdadm -d adjust all'
+      delegate_to: "{{ kvm-guest__primary }}"
+      notifies: 'primary DRBD was changed'
+
+    - name: 'update DRBD ressource definition on {{ kvm-guest__secondary }}"'
+      template:
+        src: 'drbd_vm.res.j2'
+        dest: "/etc/drbd.d/{{ kvm-guest__name }}.res"
+        validate: 'drbdadm -d adjust all'
+      delegate_to: "{{ kvm-guest__secondary }}"
+      notifies: 'secondary DRBD was changed'
+
+    - name: 'synchronize DRBD ressources'
+      command: "drbdadm -- --overwrite-data-of-peer primary {{ kvm-guest__name }}"
+      delegate_to: "{{ kvm-guest__primary }}"
+
+- name: "Define {{ kvm-guest__name }}"
+  virt:
+    command: define
+    xml: "{{ lookup('template', 'vm_template.xml.j2') }}"
+    autostart: true
+    delegate_to: "{{ kvm-guest__primary }}"

kvm-guest/tasks/main.yml

@@ -0,0 +1,37 @@
+---
+
+- name: "create logical volumes for {{ kvm-guest__name }} on kvm cloud"
+  block:
+    - name: "create logical volumes on {{ kvm-guest__primary }}"
+      lvol:
+        vg: "{{ item.group }}"'
+        lv: "{{ item.name }}"
+        size: "{{ item.size }}"
+      with_items: "{{ kvm-guest__volumes }}"
+      delegate_to: "{{ kvm-guest__primary }}"
+      register: kvm-guest_primary_lvm
+
+    - name: 'create logical volumes on {{ kvm-guest__secondary }}"'
+      lvol:
+        vg: "{{ item.group }}"'
+        lv: "{{ item.name }}"
+        size: "{{ item.size }}"
+      with_items: "{{ kvm-guest__volumes }}"
+      delegate_to: "{{ kvm-guest__secondary }}"
+      when: kvm-guest_primary_lvm
+
+- name: "create DRBD ressources for {{ kvm-guest__name }} on kvm cloud"
+  block:
+    - name: "create DRBD ressource on {{ kvm-guest__primary }}"
+      template:
+        src: 'drbd_vm.res.j2'
+        dest: "/etc/drbd.d/{{ kvm-guest__name }}.res"
+      delegate_to: "{{ kvm-guest__primary }}"
+      register: kvm-guest_primary_lvm
+
+    - name: 'create DRBD ressource on {{ kvm-guest__secondary }}"'
+      template:
+        src: 'drbd_vm.res.j2'
+        dest: "/etc/drbd.d/{{ kvm-guest__name }}.res"
+      delegate_to: "{{ kvm-guest__secondary }}"
+      when: kvm-guest_primary_lvm

kvm-guest/templates/drbd_vm.res.j2

@@ -0,0 +1,28 @@
+resource "{{ kvm-guest__name }}" {
+    net {
+        cram-hmac-alg "sha1";
+        shared-secret "{{ kvm-guest__drbd_secret }}";
+        # Si pas de lien dedié 10G, passer en protocol A
+        # Et desactiver allow-two-primaries;
+        protocol C;
+        allow-two-primaries;
+        # Tuning perf.
+        #max-buffers 8000;
+        #max-epoch-size 8000;
+        #sndbuf-size 0;
+    }
+{% for volume in kvm-guest__volumes %}
+    volume {{ loop.index }} {
+        device minor {{ volume.device }};
+        disk /dev/{{ volume.group }}/{{ volume.name }};
+        meta-disk internal;
+    }
+{% endfor %}
+
+    on {{ kvm-guest__primary }} {
+        address {{ kvm-guest__primary_ip }}:{{ kvm-guest__port }};
+    }
+    on {{ kvm-guest__secondary }} {
+        address {{ kvm-guest__secondary_ip }}:{{ kvm-guest__port }};
+    }
+}