=====
Usage
=====

The Glance project provides services for discovering, registering, and
retrieving virtual machine images. Glance has a RESTful API that allows
querying of VM image metadata as well as retrieval of the actual image.

Sample pillars
==============

.. code-block:: yaml

    glance:
      server:
        enabled: true
        version: juno
        workers: 8
        glance_uid: 302
        glance_gid: 302
        container_formats:
          ami:
            enabled: True
          ari:
            enabled: False
          docker:
            enabled: True
        disk_formats:
          vhd:
            enabled: False
          raw:
            enabled: True
          qcow2:
            enabled: True
        concurrency:
          lock_path: '/var/lib/glance/tmp'
        policy:
          publicize_image:
            - "role:admin"
            - "role:image_manager"
        database:
          engine: mysql
          host: 127.0.0.1
          port: 3306
          name: glance
          user: glance
          password: pwd
        identity:
          engine: keystone
          host: 127.0.0.1
          port: 35357
          tenant: service
          user: glance
          password: pwd
        message_queue:
          engine: rabbitmq
          host: 127.0.0.1
          port: 5672
          user: openstack
          password: pwd
          virtual_host: '/openstack'
        storage:
          engine: file
        images:
        - name: "CirrOS 0.3.1"
          format: qcow2
          file: cirros-0.3.1-x86_64-disk.img
          source: http://cdn.download.cirros-cloud.net/0.3.1/cirros-0.3.1-x86_64-disk.img
          public: true
        audit:
          enabled: false
        api_limit_max: 100
        limit_param_default: 50
        barbican:
          enabled: true

The pagination is controlled by the ``api_limit_max`` and ``limit_param_default``
parameters as shown above:

* ``api_limit_max``
   Defines the maximum number of records that the server will return.

* ``limit_param_default``
   The default ``limit`` parameter that applies if the request didn't define
   it explicitly.

Configuration of the ``policy.json`` file:

.. code-block:: yaml

    glance:
      server:
        ....
        policy:
          publicize_image: "role:admin"
          # Add key without value to remove line from policy.json
          add_member:

Keystone and cinder region

.. code-block:: yaml

    glance:
      server:
        enabled: true
        version: kilo
        ...
        identity:
          engine: keystone
          host: 127.0.0.1
          region: RegionTwo
        ...

Ceph integration glance

.. code-block:: yaml

    glance:
      server:
        enabled: true
        version: juno
        storage:
          engine: rbd,http
          user: glance
          pool: images
          chunk_size: 8
          client_glance_key: AQDOavlU6BsSJhAAnpFR906mvdgdfRqLHwu0Uw==

VMWare integration:

.. code-block:: yaml

    glance:
      server
        storage:
          engine: vmware
          default_store: vsphere
          vmware:
            enabled: true
            server_host: 1.2.3.4
            server_username: vmware_username
            server_password: vmware_password
            datastores:
              data1:
                name: datastore_name1
                enabled: true
                path: datacenter_name
                weight: 10
              data2:
                name: datastore_name2
                enabled: true
                path: datacenter_name

RabbitMQ HA setup

.. code-block:: yaml

    glance:
      server:
        ....
        message_queue:
          engine: rabbitmq
          members:
            - host: 10.0.16.1
            - host: 10.0.16.2
            - host: 10.0.16.3
          user: openstack
          password: pwd
          virtual_host: '/openstack'
        ....

Quota Options

.. code-block:: yaml

    glance:
      server:
        ....
        quota:
          image_member: -1
          image_property: 256
          image_tag: 256
          image_location: 15
          user_storage: 0
        ....

Maximum size of image

.. code-block:: yaml

    glance:
      server:
        ....
        image_size_cap: 2199023255552 # 2TB, twice current default

Configuring TLS communications
------------------------------

.. note:: By default, system wide installed CA certs are used, so
          ``cacert_file`` param is optional, as well as ``cacert``.

- **RabbitMQ TLS**

  .. code-block:: yaml

   glance:
     server:
        message_queue:
          port: 5671
          ssl:
            enabled: True
            (optional) cacert: cert body if the cacert_file does not exists
            (optional) cacert_file: /etc/openstack/rabbitmq-ca.pem
            (optional) version: TLSv1_2

- **MySQL TLS**

  .. code-block:: yaml

   glance:
     server:
        database:
          ssl:
            enabled: True
            (optional) cacert: cert body if the cacert_file does not exists
            (optional) cacert_file: /etc/openstack/mysql-ca.pem

- **Openstack HTTPS API**

  Set the ``https`` as protocol at ``glance:server`` sections:

  .. code-block:: yaml

   glance:
     server:
        identity:
           protocol: https
           (optional) cacert_file: /etc/openstack/proxy.pem
        registry:
           protocol: https
           (optional) cacert_file: /etc/openstack/proxy.pem
        storage:
           engine: cinder, swift
           cinder:
              protocol: https
             (optional) cacert_file: /etc/openstack/proxy.pem
           swift:
              store:
                  (optional) cafile: /etc/openstack/proxy.pem

Enable Glance Image Cache:

.. code-block:: yaml

    glance:
      server:
        image_cache:
          enabled: true
          enable_management: true
          directory: /var/lib/glance/image-cache/
          max_size: 21474836480
      ....

Enable auditing filter (CADF):

.. code-block:: yaml

    glance:
      server:
        audit:
          enabled: true
      ....
          filter_factory: 'keystonemiddleware.audit:filter_factory'
          map_file: '/etc/pycadf/glance_api_audit_map.conf'
      ....

Swift integration glance

.. code-block:: yaml

    glance:
      server:
        enabled: true
        version: mitaka
        storage:
          engine: swift,http
          swift:
            store:
              auth:
                address: http://keystone.example.com:5000/v2.0
                version: 2
              endpoint_type: publicURL
              container: glance
              create_container_on_put: true
              retry_get_count: 5
              user: 2ec7966596504f59acc3a76b3b9d9291:glance-user
              key: someRandomPassword

Another way, which also supports multiple swift backends, can be
configured like this:

.. code-block:: yaml

    glance:
      server:
        enabled: true
        version: mitaka
        storage:
          engine: swift,http
          swift:
            store:
              endpoint_type: publicURL
              container: glance
              create_container_on_put: true
              retry_get_count: 5
              references:
                my_objectstore_reference_1:
                  auth:
                    address: http://keystone.example.com:5000/v2.0
                    version: 2
                  user: 2ec7966596504f59acc3a76b3b9d9291:glance-user
                  key: someRandomPassword

Enable CORS parameters:

.. code-block:: yaml

    glance:
      server:
        cors:
          allowed_origin: https:localhost.local,http:localhost.local
          expose_headers: X-Auth-Token,X-Openstack-Request-Id,X-Subject-Token
          allow_methods: GET,PUT,POST,DELETE,PATCH
          allow_headers: X-Auth-Token,X-Openstack-Request-Id,X-Subject-Token
          allow_credentials: True
          max_age: 86400

Enable Viewing Multiple Locations
---------------------------------

If you want to expose all locations available (for example when you have
multiple backends configured), then you can configure this like so:

.. code-block:: yaml

    glance:
      server:
        show_multiple_locations: True
        location_strategy: store_type
        store_type_preference: rbd,swift,file

.. note:: The ``show_multiple_locations`` option is deprecated since
          Newton and is planned to be handled by policy files *only*
          starting with the Pike release.

This feature is convenient in a scenario when you have swift and rbd
configured and want to benefit from rbd enhancements.

Barbican integration glance
---------------------------

.. code-block:: yaml

    glance:
      server:
          barbican:
            enabled: true

Adding cron-job
---------------

.. code-block:: yaml

    glance:
      server:
        cron:
          cache_pruner:
            special_period: '@daily'
          cache_cleaner:
            hour: '5'
            minute: '30'
            daymonth: '\*/2'


Image cache settings
--------------------

.. code-block:: yaml

    glance:
      server:
        image_cache:
          max_size: 10737418240
          stall_time: 86400
          directory: '/var/lib/glance/image-cache/'


Client role
-----------

Glance images

.. code-block:: yaml

  glance:
    client:
      enabled: true
      server:
        profile_admin:
          image:
            cirros-test:
              visibility: public
              protected: false
              location: http://download.cirros-cloud.net/0.3.4/cirros-0.3.4-i386-disk.img

Enhanced logging with logging.conf
----------------------------------

By default logging.conf is disabled.

That is possible to enable per-binary logging.conf with new variables:

* ``openstack_log_appender``
   Set to true to enable ``log_config_append`` for all OpenStack services

* ``openstack_fluentd_handler_enabled``
   Set to true to enable FluentHandler for all Openstack services

* ``openstack_ossyslog_handler_enabled``
   Set to true to enable OSSysLogHandler for all Openstack services

Only ``WatchedFileHandler``, ``OSSysLogHandler``, and ``FluentHandler``
are available.

Also, it is possible to configure this with pillar:

.. code-block:: yaml

  glance:
    server:
      logging:
        log_appender: true
        log_handlers:
          watchedfile:
            enabled: true
          fluentd:
            enabled: true
          ossyslog:
            enabled: true

Enable x509 and ssl communication between Glance and Galera cluster.
---------------------
By default communication between Glance and Galera is unsecure.

glance:
  server:
    database:
      x509:
        enabled: True

You able to set custom certificates in pillar:

glance:
  server:
    database:
      x509:
        cacert: (certificate content)
        cert: (certificate content)
        key: (certificate content)

You can read more about it here:
    https://docs.openstack.org/security-guide/databases/database-access-control.html

Glance services on controller node with memcached caching and security strategy:

.. code-block:: yaml

    glance:
      server:
        enabled: true
        ...
        cache:
          engine: memcached
          members:
          - host: 127.0.0.1
            port: 11211
          - host: 127.0.0.1
            port: 11211
          security:
            enabled: true
            strategy: ENCRYPT
            secret_key: secret

Show all image locations when returning an image. This configuration option indicates
whether to show all the image locations when returning image details to the user.

.. code-block:: yaml

    glance:
      server:
        enabled: true
        ...
        show_multiple_locations: True

Change default resource quotas using configmap template settings:
-----------------------------------------------------------------

.. code-block:: yaml

    glance:
      server:
        configmap:
          glace_api:
            DEFAULT:
              image_member_quota: 128
              image_property_quota: 128
              image_tag_quota: 128
              image_location_quota: 10
              user_storage_quota: 0
          glace_registry:
            DEFAULT:
              image_member_quota: 128
              image_property_quota: 128
              image_tag_quota: 128
              image_location_quota: 10
              user_storage_quota: 0

Change default service policy configuration:
--------------------------------------------

.. code-block:: yaml

    glance:
      server:
        policy:
          manage_image_cache: 'role:admin'
          get_task: 'role:admin'
          # Add key without value to remove line from policy.json
          modify_member:


Usage
=====

#. Import new public image:

   .. code-block:: yaml

    glance image-create --name 'Windows 7 x86_64' --is-public true --container-format bare --disk-format qcow2  < ./win7.qcow2

#. Change new image's disk properties

   .. code-block:: yaml

    glance image-update "Windows 7 x86_64" --property hw_disk_bus=ide

#. Change new image's NIC properties

   .. code-block:: yaml

    glance image-update "Windows 7 x86_64" --property hw_vif_model=rtl8139

Upgrades
========

Each openstack formula provide set of phases (logical bloks) that will help to
build flexible upgrade orchestration logic for particular components. The list
of phases and theirs descriptions are listed in table below:

+-------------------------------+------------------------------------------------------+
| State                         | Description                                          |
+===============================+======================================================+
| <app>.upgrade.service_running | Ensure that all services for particular application  |
|                               | are enabled for autostart and running                |
+-------------------------------+------------------------------------------------------+
| <app>.upgrade.service_stopped | Ensure that all services for particular application  |
|                               | disabled for autostart and dead                      |
+-------------------------------+------------------------------------------------------+
| <app>.upgrade.pkgs_latest     | Ensure that packages used by particular application  |
|                               | are installed to latest available version.           |
|                               | This will not upgrade data plane packages like qemu  |
|                               | and openvswitch as usually minimal required version  |
|                               | in openstack services is really old. The data plane  |
|                               | packages should be upgraded separately by `apt-get   |
|                               | upgrade` or `apt-get dist-upgrade`                   |
|                               | Applying this state will not autostart service.      |
+-------------------------------+------------------------------------------------------+
| <app>.upgrade.render_config   | Ensure configuration is rendered actual version.     +
+-------------------------------+------------------------------------------------------+
| <app>.upgrade.pre             | We assume this state is applied on all nodes in the  |
|                               | cloud before running upgrade.                        |
|                               | Only non destructive actions will be applied during  |
|                               | this phase. Perform service built in service check   |
|                               | like (keystone-manage doctor and nova-status upgrade)|
+-------------------------------+------------------------------------------------------+
| <app>.upgrade.upgrade.pre     | Mostly applicable for data plane nodes. During this  |
|                               | phase resources will be gracefully removed from      |
|                               | current node if it is allowed. Services for upgraded |
|                               | application will be set to admin disabled state to   |
|                               | make sure node will not participate in resources     |
|                               | scheduling. For example on gtw nodes this will set   |
|                               | all agents to admin disable state and will move all  |
|                               | routers to other agents.                             |
+-------------------------------+------------------------------------------------------+
| <app>.upgrade.upgrade         | This state will basically upgrade application on     |
|                               | particular target. Stop services, render             |
|                               | configuration, install new packages, run offline     |
|                               | dbsync (for ctl), start services. Data plane should  |
|                               | not be affected, only OpenStack python services.     |
+-------------------------------+------------------------------------------------------+
| <app>.upgrade.upgrade.post    | Add services back to scheduling.                     |
+-------------------------------+------------------------------------------------------+
| <app>.upgrade.post            | This phase should be launched only when upgrade of   |
|                               | the cloud is completed. Cleanup temporary files,     |
|                               | perform other post upgrade tasks.                    |
+-------------------------------+------------------------------------------------------+
| <app>.upgrade.verify          | Here we will do basic health checks (API CRUD        |
|                               | operations, verify do not have dead network          |
|                               | agents/compute services)                             |
+-------------------------------+------------------------------------------------------+


Read more
==========

* http://ceph.com/docs/master/rbd/rbd-openstack/