048ef85d2c
More neutron configuration updates for Liberty including some changes for RDO packages. 1) Remove explicit configuration of kernel parameters because neutron handles them. 2) Explicitly add DNS resolver to virtual networks because default value prevents name resolution within instances. 3) Move some configuration options to better locations. 4) RDO: Remove workaround for init scripts. 5) RDO: Explicitly configure lock_path in neutron.conf file. 6) RDO: Install openstack-neutron package on compute nodes because it also installs packages on which the Linux bridge agent depends. Change-Id: I2c70c64e1272ee33eb364c079d8187ade7235ee2 Implements: blueprint installguide-liberty
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6.1 KiB
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142 lines
6.1 KiB
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.. _launch-instance-networks-public:
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Public provider network
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~~~~~~~~~~~~~~~~~~~~~~~
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Before launching an instance, you must create the necessary virtual network
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infrastructure. For networking option 1, an instance uses a public provider
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virtual network that connects to the physical network infrastructure
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via layer-2 (bridging/switching). This network includes a DHCP server that
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provides IP addresses to instances.
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The ``admin`` or other privileged user must create this network because it
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connects directly to the physical network infrastructure.
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.. note::
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The following instructions and diagrams use example IP address ranges. You
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must adjust them for your particular environment.
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.. figure:: figures/network1-overview.png
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:alt: Networking Option 1: Provider networks - Overview
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**Networking Option 1: Provider networks - Overview**
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.. figure:: figures/network1-connectivity.png
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:alt: Networking Option 1: Provider networks - Connectivity
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**Networking Option 2: Provider networks - Connectivity**
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Create the public network
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-------------------------
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#. On the controller node, source the ``admin`` credentials to gain access to
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admin-only CLI commands:
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.. code-block:: console
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$ source admin-openrc.sh
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#. Create the network:
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.. code-block:: console
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$ neutron net-create public --shared --provider:physical_network public \
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--provider:network_type flat
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Created a new network:
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+---------------------------+--------------------------------------+
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| Field | Value |
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+---------------------------+--------------------------------------+
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| admin_state_up | True |
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| id | 0e62efcd-8cee-46c7-b163-d8df05c3c5ad |
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| mtu | 0 |
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| name | public |
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| port_security_enabled | True |
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| provider:network_type | flat |
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| provider:physical_network | public |
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| provider:segmentation_id | |
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| router:external | False |
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| shared | True |
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| status | ACTIVE |
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| subnets | |
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| tenant_id | d84313397390425c8ed50b2f6e18d092 |
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+---------------------------+--------------------------------------+
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The ``--shared`` option allows all projects to use the virtual network.
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The ``--provider:physical_network public`` and
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``--provider:network_type flat`` options connect the flat virtual network
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to the flat (native/untagged) public physical network on the ``eth1``
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interface on the host using information from the following files:
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``ml2_conf.ini``:
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.. code-block:: ini
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[ml2_type_flat]
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flat_networks = public
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``linuxbridge_agent.ini``:
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.. code-block:: ini
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[linux_bridge]
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physical_interface_mappings = public:eth1
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#. Create a subnet on the network:
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.. code-block:: console
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$ neutron subnet-create public PUBLIC_NETWORK_CIDR --name public \
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--allocation-pool start=START_IP_ADDRESS,end=END_IP_ADDRESS\
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--dns-nameserver DNS_RESOLVER --gateway PUBLIC_NETWORK_GATEWAY
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Replace ``PUBLIC_NETWORK_CIDR`` with the subnet on the public physical
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network in CIDR notation.
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Replace ``START_IP_ADDRESS`` and ``END_IP_ADDRESS`` with the first and
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last IP address of the range within the subnet that you want to allocate
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for instances. This range must not include any existing active IP
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addresses.
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Replace ``DNS_RESOLVER`` with the IP address of a DNS resolver. In
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most cases, you can use one from the ``/etc/resolv.conf`` file on
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the host.
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Replace ``PUBLIC_NETWORK_GATEWAY`` with the gateway IP address on the
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public physical network, typically the ".1" IP address.
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**Example**
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The public network uses 203.0.113.0/24 with a gateway on 203.0.113.1.
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A DHCP server assigns each instance an IP address from 203.0.113.101
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to 203.0.113.200. All instances use 8.8.4.4 as a DNS resolver.
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.. code-block:: console
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$ neutron subnet-create public 203.0.113.0/24 --name public \
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--allocation-pool start=203.0.113.101,end=203.0.113.200 \
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--dns-nameserver 8.8.4.4 --gateway 203.0.113.1
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Created a new subnet:
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+-------------------+----------------------------------------------------+
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| Field | Value |
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+-------------------+----------------------------------------------------+
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| allocation_pools | {"start": "203.0.113.101", "end": "203.0.113.200"} |
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| cidr | 203.0.113.0/24 |
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| dns_nameservers | 8.8.4.4 |
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| enable_dhcp | True |
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| gateway_ip | 203.0.113.1 |
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| host_routes | |
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| id | 5cc70da8-4ee7-4565-be53-b9c011fca011 |
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| ip_version | 4 |
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| ipv6_address_mode | |
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| ipv6_ra_mode | |
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| name | public |
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| network_id | 0e62efcd-8cee-46c7-b163-d8df05c3c5ad |
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| subnetpool_id | |
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| tenant_id | d84313397390425c8ed50b2f6e18d092 |
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+-------------------+----------------------------------------------------+
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Return to :ref:`Launch an instance - Create virtual networks
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<launch-instance-networks>`.
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