Update some examples to use openstackclient
The DNS ordering and OVN DHCP documents were out-of-date and using the old neutronclient, updated. Noticed while fixing an openstackclient bug related to dns_nameservers ordering. TrivialFix Related-bug: #2053201 Change-Id: Iab15750a4adc8dc78d839f0a1b952f9d87bdab8a
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Brian Haley
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2d74a93d68
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@ -34,57 +34,81 @@ Get Subnet Details Info
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-----------------------
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::
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changzhi@stack:~/devstack$ neutron subnet-list
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+--------------------------------------+------+-------------+--------------------------------------------+
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| id | name | cidr | allocation_pools |
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+--------------------------------------+------+-------------+--------------------------------------------+
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| 1a2d261b-b233-3ab9-902e-88576a82afa6 | | 10.0.0.0/24 | {"start": "10.0.0.2", "end": "10.0.0.254"} |
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+--------------------------------------+------+-------------+--------------------------------------------+
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$ openstack subnet list
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+--------------------------------------+---------+--------------------------------------+-------------+
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| ID | Name | Network | Subnet |
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+--------------------------------------+---------+--------------------------------------+-------------+
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| 1a2d261b-b233-3ab9-902e-88576a82afa6 | private | a404518c-800d-2353-9193-57dbb42ac5ee | 10.0.0.0/24 |
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+--------------------------------------+---------+--------------------------------------+-------------+
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changzhi@stack:~/devstack$ neutron subnet-show 1a2d261b-b233-3ab9-902e-88576a82afa6
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+------------------+--------------------------------------------+
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| Field | Value |
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+------------------+--------------------------------------------+
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| allocation_pools | {"start": "10.0.0.2", "end": "10.0.0.254"} |
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| cidr | 10.0.0.0/24 |
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| dns_nameservers | 1.1.1.1 |
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| | 2.2.2.2 |
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| | 3.3.3.3 |
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| enable_dhcp | True |
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| gateway_ip | 10.0.0.1 |
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| host_routes | |
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| id | 1a2d26fb-b733-4ab3-992e-88554a87afa6 |
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| ip_version | 4 |
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| name | |
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| network_id | a404518c-800d-2353-9193-57dbb42ac5ee |
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| tenant_id | 3868290ab10f417390acbb754160dbb2 |
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+------------------+--------------------------------------------+
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$ openstack subnet show 1a2d261b-b233-3ab9-902e-88576a82afa6
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+----------------------+--------------------------------------+
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| Field | Value |
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+----------------------+--------------------------------------+
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| allocation_pools | 10.0.0.2-10.0.0.254 |
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| cidr | 10.0.0.0/24 |
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| created_at | 2024-02-13T21:42:34Z |
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| description | |
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| dns_nameservers | 8.8.4.4, 8.8.8.8 |
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| dns_publish_fixed_ip | None |
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| enable_dhcp | True |
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| gateway_ip | 10.0.0.1 |
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| host_routes | |
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| id | 1a2d26fb-b733-4ab3-992e-88554a87afa6 |
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| ip_version | 4 |
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| ipv6_address_mode | None |
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| ipv6_ra_mode | None |
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| name | private |
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| network_id | a404518c-800d-2353-9193-57dbb42ac5ee |
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| project_id | 3868290ab10f417390acbb754160dbb2 |
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| revision_number | 0 |
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| segment_id | None |
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| service_types | |
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| subnetpool_id | |
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| tags | |
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| updated_at | 2024-02-13T21:42:34Z |
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+----------------------+--------------------------------------+
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Update Subnet DNS Nameservers
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-----------------------------
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.. note::
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``--no-dns-nameserver`` must be passed to clear the current list,
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otherwise a conflict will be raised if there are duplicates.
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::
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neutron subnet-update 1a2d261b-b233-3ab9-902e-88576a82afa6 \
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--dns_nameservers list=true 3.3.3.3 2.2.2.2 1.1.1.1
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$ openstack subnet set --no-dns-nameserver --dns-nameserver 8.8.8.8 \
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--dns-nameserver 8.8.4.4 1a2d261b-b233-3ab9-902e-88576a82afa6
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changzhi@stack:~/devstack$ neutron subnet-show 1a2d261b-b233-3ab9-902e-88576a82afa6
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+------------------+--------------------------------------------+
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| Field | Value |
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+------------------+--------------------------------------------+
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| allocation_pools | {"start": "10.0.0.2", "end": "10.0.0.254"} |
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| cidr | 10.0.0.0/24 |
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| dns_nameservers | 3.3.3.3 |
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| | 2.2.2.2 |
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| | 1.1.1.1 |
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| enable_dhcp | True |
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| gateway_ip | 10.0.0.1 |
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| host_routes | |
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| id | 1a2d26fb-b733-4ab3-992e-88554a87afa6 |
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| ip_version | 4 |
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| name | |
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| network_id | a404518c-800d-2353-9193-57dbb42ac5ee |
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| tenant_id | 3868290ab10f417390acbb754160dbb2 |
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+------------------+--------------------------------------------+
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$ openstack subnet show 1a2d261b-b233-3ab9-902e-88576a82afa6
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+----------------------+--------------------------------------+
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| Field | Value |
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+----------------------+--------------------------------------+
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| allocation_pools | 10.0.0.2-10.0.0.254 |
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| cidr | 10.0.0.0/24 |
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| created_at | 2024-02-13T21:42:34Z |
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| description | |
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| dns_nameservers | 8.8.8.8, 8.8.4.4 |
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| dns_publish_fixed_ip | None |
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| enable_dhcp | True |
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| gateway_ip | 10.0.0.1 |
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| host_routes | |
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| id | 1a2d26fb-b733-4ab3-992e-88554a87afa6 |
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| ip_version | 4 |
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| ipv6_address_mode | None |
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| ipv6_ra_mode | None |
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| name | private |
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| network_id | a404518c-800d-2353-9193-57dbb42ac5ee |
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| project_id | 3868290ab10f417390acbb754160dbb2 |
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| revision_number | 1 |
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| segment_id | None |
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| service_types | |
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| subnetpool_id | |
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| tags | |
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| updated_at | 2024-02-13T21:42:34Z |
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+----------------------+--------------------------------------+
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As shown in above output, the order of the DNS nameservers has been updated.
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New virtual machines deployed to this subnet will receive the DNS nameservers
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@ -36,12 +36,12 @@ are overridden. In order to map the port DHCP_Options row with the port,
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the OVN ML2 driver stores both the subnet id and port id in the 'external_ids'
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column.
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If admin wants to disable native OVN DHCPv4 for any particular port, then the
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admin needs to define the 'dhcp_disabled' with the value 'true' in the extra
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DHCP options.
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If an admin wants to disable native OVN DHCPv4 for any particular port, then
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the admin needs to define the 'dhcp_disabled' with the value 'true' in the
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extra DHCP options.
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Ex. neutron port-update <PORT_ID> \
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--extra-dhcp-opt ip_version=4, opt_name=dhcp_disabled, opt_value=false
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Ex. openstack port set \
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--extra-dhcp-option name='dhcp_disabled',value=true,ip-version=4 <PORT_ID>
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DHCPv6
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@ -102,8 +102,7 @@ Let's add a DHCP option to a Neutron port:
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.. code-block:: bash
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$ neutron port-update --extra-dhcp-opt opt_name='server-ip-address',opt_value='10.0.0.1' b4c3f265-369e-4bf5-8789-7caa9a1efb9c
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Updated port: b4c3f265-369e-4bf5-8789-7caa9a1efb9c
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$ openstack port set --extra-dhcp-option name='server-ip-address',value='10.0.0.1' b4c3f265-369e-4bf5-8789-7caa9a1efb9c
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.. end
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