aee8b6d910
The MNAIO tooling is a test system, and with that target we can afford to be opinionated in the implementation rather than try to cater to every possibility. Now that the file-backed VM implementation has matured, we can switch to using it exclusively. This cuts down on code complexity and allows us to mature the implementation further with more options without having to cater to two options. Change-Id: Ibe04b5676a392301cd79a5d290b77df4c7d9f79a
299 lines
11 KiB
ReStructuredText
299 lines
11 KiB
ReStructuredText
OpenStack-Ansible Multi-Node AIO
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################################
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:date: 2016-03-09
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:tags: rackspace, openstack, ansible
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:category: \*openstack, \*nix
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About this repository
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---------------------
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Full OpenStack deployment using a single OnMetal host from the
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Rackspace Public Cloud. This is a multi-node installation using
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VMs that have been PXE booted which was done to provide an environment
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that is almost exactly what is in production. This script will build, kick
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and deploy OpenStack using KVM, OpenStack-Ansible within 12 Nodes
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and 1 load balancer all using a Hyper Converged environment.
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Process
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-------
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Create at least one physical host that has public network access and is running
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an Ubuntu 14.04/16.04/18.04 LTS Operating system. System assumes that you have an
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unpartitioned device with at least 1TB of storage, however you can customize the
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size of each VM volume by setting the option ``${VM_DISK_SIZE}``. If you're
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using the Rackspace OnMetal servers the drive partitioning will be done for you
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by detecting the largest unpartitioned device. If you wish to use a different
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device, then set the ``mnaio_data_disk`` extra var when running the playbooks or
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by exporting the extra var before running build.sh, eg:
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.. code-block:: bash
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export MNAIO_ANSIBLE_PARAMETERS="-e mnaio_data_disk=sdb"
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./build.sh
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The playbooks will look for a volume group named "vg01", if this volume group
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exists no partitioning or setup on the data disk will take place. To effectively
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use this process for testing it's recommended that the host machine have at least
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32GiB of RAM.
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=========== ======== ============
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Physical Host Specs known to work well
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--------------------------------------
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CPU CORES MEMORY DISK SPACE
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=========== ======== ============
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20 124GB 1.3TB
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=========== ======== ============
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These specs are covered by the Rackspace OnMetal-IO v1/2 Servers.
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When your ready, run the build script by executing ``bash ./build.sh``. The
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build script current executes a deployment of OpenStack Ansible using the master
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branch. If you want to do something other than deploy master you can set the
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``${OSA_BRANCH}`` variable to any branch, tag, or SHA.
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Post Deployment
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---------------
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Once deployed you can use virt-manager to manage the KVM instances on the host,
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similar to a DRAC or ILO.
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LINUX:
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If you're running a linux system as your workstation simply install
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virt-manager from your package manager and connect to the host via
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QEMU/KVM:SSH
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OSX:
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If you're running a MAC you can install https://www.xquartz.org/ to have
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access to a X11 client, then make use of X over SSH to connect to the
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virt-manager application. Using X over SSH is covered in
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https://www.cyberciti.biz/faq/apple-osx-mountain-lion-mavericks-install-xquartz-server/
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WINDOWS:
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If you're running Windows, you can install virt-viewer from the KVM Download
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site.
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https://virt-manager.org/download/
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Deployment screenshot
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^^^^^^^^^^^^^^^^^^^^^
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.. image:: screenshots/virt-manager-screenshot.jpeg
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:scale: 50 %
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:alt: Screen shot of virt-manager and deployment in action
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:align: center
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Deployments can be accessed and monitored via virt-manager
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Console Access
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^^^^^^^^^^^^^^
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.. image:: screenshots/console-screenshot.jpeg
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:scale: 50 %
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:alt: Screen shot of virt-manager console
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:align: center
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The root password for all VMs is "**secrete**". This password is being set
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within the pre-seed files under the "Users and Password" section. If you want
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to change this password please edit the pre-seed files.
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``build.sh`` Options
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--------------------
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Set an external inventory used for the MNAIO:
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``MNAIO_INVENTORY=${MNAIO_INVENTORY:-playbooks/inventory}``
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Set to instruct the preseed what the default network is expected to be:
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``DEFAULT_NETWORK="${DEFAULT_NETWORK:-eth0}"``
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Set the VM disk size in gigabytes:
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``VM_DISK_SIZE="${VM_DISK_SIZE:-252}"``
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Instruct the system do all of the required host setup:
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``SETUP_HOST=${SETUP_HOST:-true}``
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Instruct the system do all of the required PXE setup:
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``SETUP_PXEBOOT=${SETUP_PXEBOOT:-true}``
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Instruct the system do all of the required DHCPD setup:
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``SETUP_DHCPD=${SETUP_DHCPD:-true}``
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Instruct the system to Kick all of the VMs:
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``DEPLOY_VMS=${DEPLOY_VMS:-true}``
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Instruct the VM to use the selected image, eg. ubuntu-16.04-amd64:
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``DEFAULT_IMAGE=${DEFAULT_IMAGE:-ubuntu-16.04-amd64}``
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Instruct the VM to use the selected kernel meta package, eg. linux-generic:
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``DEFAULT_KERNEL=${DEFAULT_KERNEL:-linux-image-generic}``
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Set the OSA repo for this script to retrieve:
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``OSA_REPO=${OSA_REPO:-https://git.openstack.org/openstack/openstack-ansible}``
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Set the openstack-ansible-ops repo to retrieve for the ELK stack:
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``OS_OPS_REPO=${OS_OPS_REPO:-https://git.openstack.org/openstack/openstack-ansible-ops}``
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Set the OSA branch for this script to deploy:
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``OSA_BRANCH=${OSA_BRANCH:-master}``
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Set the openstack-ansible-ops branch for this script to deploy:
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``OS_OPS_BRANCH=${OS_OPS_BRANCH:-master}``
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Instruct the system to deploy OpenStack Ansible:
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``DEPLOY_OSA=${DEPLOY_OSA:-true}``
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Instruct the system to deploy the ELK Stack:
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``DEPLOY_ELK=${DEPLOY_ELK:-false}``
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Instruct the system to pre-config the envs for running OSA playbooks:
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``PRE_CONFIG_OSA=${PRE_CONFIG_OSA:-true}``
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Instruct the system to run the OSA playbooks, if you want to deploy other OSA
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powered cloud, you can set it to false:
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``RUN_OSA=${RUN_OSA:-true}``
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Instruct the system to run the ELK playbooks:
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``RUN_ELK=${RUN_ELK:-false}``
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Instruct the system to configure the completed OpenStack deployment with some
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example flavors, images, networks, etc.:
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``CONFIGURE_OPENSTACK=${CONFIGURE_OPENSTACK:-true}``
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Instruct the system to configure iptables prerouting rules for connecting to
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VMs from outside the host:
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``CONFIG_PREROUTING=${CONFIG_PREROUTING:-true}``
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Insrtuct the system to use a different Ubuntu mirror:
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``DEFAULT_MIRROR_HOSTNAME=${DEFAULT_MIRROR_HOSTNAME:-archive.ubuntu.com}``
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Instruct the system to use a different Ubuntu mirror base directory:
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``DEFAULT_MIRROR_DIR=${DEFAULT_MIRROR_DIR:-/ubuntu}``
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Instruct the system to use a set amount of ram for cinder VM type:
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``CINDER_VM_SERVER_RAM=${CINDER_VM_SERVER_RAM:-2048}``
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Instruct the system to use a set amount of ram for compute VM type:
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``COMPUTE_VM_SERVER_RAM=${COMPUTE_VM_SERVER_RAM:-8196}``
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Instruct the system to use a set amount of ram for infra VM type:
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``INFRA_VM_SERVER_RAM=${INFRA_VM_SERVER_RAM:-8196}``
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Instruct the system to use a set amount of ram for load balancer VM type:
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``LOADBALANCER_VM_SERVER_RAM=${LOADBALANCER_VM_SERVER_RAM:-1024}``
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Instruct the system to use a set amount of ram for the logging VM type:
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``LOGGING_VM_SERVER_RAM=${LOGGING_VM_SERVER_RAM:-1024}``
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Instruct the system to use a set amount of ram for the swift VM type:
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``SWIFT_VM_SERVER_RAM=${SWIFT_VM_SERVER_RAM:-1024}``
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Instruct the system where to obtain iPXE kernels (looks for ipxe.lkrn, ipxe.efi, etc):
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``IPXE_KERNEL_BASE_URL=${IPXE_KERNEL_BASE_URL:-'http://boot.ipxe.org'}``
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Instruct the system to use a customized iPXE script during boot of VMs:
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``IPXE_PATH_URL=${IPXE_PATH_URL:-''}``
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Re-kicking VM(s)
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----------------
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To re-kick all VMs, simply re-execute the ``deploy-vms.yml`` playbook and it
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will do it automatically. The ansible ``--limit`` parameter may be used to
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selectively re-kick a specific VM.
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.. code-block:: bash
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ansible-playbook -i playbooks/inventory playbooks/deploy-vms.yml
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Rerunning the build script
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--------------------------
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The build script can be rerun at any time. By default it will re-kick the entire
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system, destroying all existing VM's.
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Deploying OpenStack into the environment
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----------------------------------------
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While the build script will deploy OpenStack, you can choose to run this
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manually. To run a basic deploy using a given branch you can use the following
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snippet. Set the ansible option ``osa_branch`` or export the environment
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variable ``OSA_BRANCH`` when using the build.sh script.
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.. code-block:: bash
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ansible-playbook -i playbooks/inventory playbooks/deploy-osa.yml -vv -e 'osa_branch=master'
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Snapshotting an environment before major testing
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------------------------------------------------
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Running a snapshot on all of the vms before doing major testing is wise as it'll
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give you a restore point without having to re-kick the cloud. You can do this
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using some basic ``virsh`` commands and a little bash.
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.. code-block:: bash
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for instance in $(virsh list --all --name); do
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virsh snapshot-create-as --atomic --name $instance-kilo-snap --description "saved kilo state before liberty upgrade" $instance
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done
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Once the previous command is complete you'll have a collection of snapshots
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within all of your infrastructure hosts. These snapshots can be used to restore
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state to a previous point if needed. To restore the infrastructure hosts to a
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previous point, using your snapshots, you can execute a simple ``virsh``
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command or the following bash loop to restore everything to a known point.
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.. code-block:: bash
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for instance in $(virsh list --all --name); do
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virsh snapshot-revert --snapshotname $instance-kilo-snap --running $instance
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done
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Saving VM images for re-use on another host
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-------------------------------------------
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If you wish to save the current images in order to implement a thin-provisioned
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set of VM's which can be saved and re-used, then use the ``save-vms.yml``
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playbook. This will stop the VM's and rename the files to ``*-base.img``.
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Re-executing the ``deploy-vms.yml`` playbook afterwards will rebuild the VMs
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from those images.
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.. code-block:: bash
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ansible-playbook -i playbooks/inventory playbooks/save-vms.yml
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ansible-playbook -i playbooks/inventory playbooks/deploy-vms.yml
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To disable this default functionality when re-running ``build.sh`` set the
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build not to use the images as follows.
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.. code-block:: bash
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export MNAIO_ANSIBLE_PARAMETERS="-e vm_use_snapshot=no"
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./build.sh
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If you have previously saved some images to remote storage then, if they are
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available via a URL, they can be downloaded and used on a fresh host as follows.
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.. code-block:: bash
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# First prepare the host and get the base services started
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./bootstrap.sh
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source ansible-env.rc
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export ANSIBLE_PARAMETERS="-i playbooks/inventory"
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ansible-playbook ${ANSIBLE_PARAMETERS} playbooks/setup-host.yml
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ansible-playbook ${ANSIBLE_PARAMETERS} playbooks/deploy-acng.yml playbooks/deploy-pxe.yml playbooks/deploy-dhcp.yml
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# Then download the images
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export IMAGE_MANIFEST_URL="http://example.com/images/manifest.json"
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ansible-playbook ${ANSIBLE_PARAMETERS} playbooks/download-vms.yml -e manifest_url=${IMAGE_MANIFEST_URL}
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# Then kick off the VM's from those images
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ansible-playbook ${ANSIBLE_PARAMETERS} playbooks/deploy-vms.yml
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