--- /dev/null
+vmhost
+======
+
+This role does a lot of the setup for a mira node running Ubuntu
+(probably sticking with an LTS of trusty or later is a good idea;
+trusty is where it's got the most testing) to turn it into a
+'standard' VPS host. Our standard is: 8 qemu-kvm virtual machines,
+provisioned by libvirt through downburst, as noted in the lock
+database on paddles for the sepia lab. The first of those uses
+data storage sharing the root drive, and the last seven use
+the seven free mira drives as their storage pool.
+
+This role does not set up the storage pool directories/mount
+points, and does not add any mapping of which vpm VMs belong
+on any particular node (from the vps_hosts group). It assumes
+that you have already:
+
+- created /srv/libvirtpool on the vmhost
+
+- made subdirs there named after the vpms
+
+On mira, we then use disks b..h as separate filesystems to
+mount on vpmNNN+1..vpmNNN+7, so for miras, we will have:
+
+- made filesystems (xfs is the usual choice)
+
+- mounted those filesystems on /srv/libvirtpool/<vpm#2--N>
+
+- added UUID= lines to /etc/fstab so the mounts happen at reboot
+
+Note that the role does not assume any particular structure
+of what provides /srv/libvirtpool/vpmNNN, but simply uses that
+to drive creating libvirt pools.
+
+It is certainly possible to do the above with ansible as well,
+and a later version may.
+
+
+Variables
++++++++++
+
+Only one variable is defined, ``vmhost_apt_packages``. The default
+is empty, but the current definition in vars/ is not expected to change
+soon.
+
+Tags
+++++
+
+packages
+ Just install packages
+
+networking
+ Set up the bridge for qemu to use as the 'front' network
+
+libvirt
+ All the libvirt-related setup (pools, networks, etc.)
--- /dev/null
+---
+# default pool
+- name: Query libvirt pool 'default'
+ command: virsh pool-uuid default
+ register: pool_uuid
+ failed_when: false
+
+- name: Define libvirt pool 'default'
+ command: virsh pool-define-as --name default dir --target /var/lib/libvirt/images
+ when: pool_uuid is defined and pool_uuid | failed
+
+- name: Query 'default' pool state
+ command: virsh -q pool-info default
+ ignore_errors: yes
+ register: default_pool_info
+
+- name: Start pool 'default'
+ command: virsh pool-start default
+ when: 'default_pool_info is defined and default_pool_info.stdout|search("State: *inactive")'
+
+- name: Autostart pool 'default'
+ command: virsh pool-autostart default
+ when: 'default_pool_info is defined and default_pool_info.stdout | search("Autostart: *no")'
+
+# Per-vpm storage pools
+
+- name: Test for /srv/libvirtpool
+ stat:
+ path: /srv/libvirtpool
+ register: srv_libvirtpool
+ failed_when: srv_libvirtpool.stat.exists is False
+
+- name: Ensure proper ownership in /srv/libvirtpool
+ file:
+ path: /srv/libvirtpool
+ state: directory
+ owner: libvirt-qemu
+ group: kvm
+ recurse: yes
+ when: srv_libvirtpool.stat.exists
+
+# the dance here is to figure out which pools are already defined,
+# and avoid trying to defining them again.
+
+- name: Find defined vpm names
+ command: ls /srv/libvirtpool
+ register: ls_libvirtpool
+ when: srv_libvirtpool.stat.exists
+
+- name: See which pools are defined and which are not
+ shell: virsh pool-info {{ item }}
+ with_items: ls_libvirtpool.stdout_lines
+ register: pool_info
+ when: srv_libvirtpool.stat.exists
+ # don't bother reporting anything about this command; it's not useful
+ failed_when: false
+
+# pool_info.results is a now list of dicts, one per item, with 'rc',
+# 'changed', 'stdout', 'stderr' etc. Make a new list for
+# all of the above that failed (i.e. rc == 1), as those
+# are the pools that still need definition. "" stop
+# jinja templating from being confused with yaml, as usual;
+# {%- and -%} suppress blank lines so that the only thing
+# that expands is the list declaration.
+
+- name: Form list of undefined pools
+ set_fact:
+ pools_to_define:
+ "{%- set l = [] %}
+ {%- for result in pool_info.results %}
+ {%- if result.rc == 1 %}
+ {%- set dummy = l.append(result.item) %}
+ {%- endif %}
+ {%- endfor -%}
+ {{ l | list }}"
+
+- name: Define pools which are left to be defined
+ shell: |
+ virsh pool-define-as --name {{ item | quote }} --type dir --target /srv/libvirtpool/{{ item }};
+ virsh pool-autostart {{ item | quote }};
+ virsh pool-build {{ item | quote }};
+ virsh pool-start {{ item | quote }}
+ with_items: pools_to_define
+ when: pools_to_define|length > 0
+
+# Front network
+
+- name: Query for front network definition
+ command: virsh net-info front
+ failed_when: false
+ register: front_net
+
+- name: Send front network definition file
+ copy:
+ src: ../files/libvirt-net-front.xml
+ dest: /tmp/libvirt-net-front.xml
+ when: front_net is defined and front_net | failed
+
+- name: Create front network
+ command: virsh net-define /tmp/libvirt-net-front.xml
+ when: front_net is defined and front_net | failed
+
+- name: Remove tmp network definition file
+ file:
+ dest: /tmp/libvirt-net-front.xml
+ state: absent
+ when: front_net is defined and front_net | failed
+
+- name: Re-query for front network definition
+ command: virsh net-info front
+ ignore_errors: yes
+ register: front_net
+
+- name: Start front network
+ command: virsh net-start front
+ when: 'front_net is defined and front_net.stdout | search("Active: *no")'
+
+- name: Set front network to autostart
+ command: virsh net-autostart front
+ when: 'front_net is defined and front_net.stdout | search("Autostart: *no")'
+
+# Final steps
+
+- name: Allow libvirt for teuthology user
+ user:
+ name: "{{ teuthology_user }}"
+ groups: libvirtd
+ append: yes
+
+- name: Restart libvirt-bin
+ command: service libvirt-bin restart
projects / ceph-cm-ansible.git / commitdiff