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diff --git a/docs/setupservicevm/4-ipv6-configguide-servicevm.rst b/docs/setupservicevm/4-ipv6-configguide-servicevm.rst new file mode 100644 index 0000000..1ffbc53 --- /dev/null +++ b/docs/setupservicevm/4-ipv6-configguide-servicevm.rst @@ -0,0 +1,324 @@ +========================================== +Setting Up a Service VM as an IPv6 vRouter +========================================== + +Now we can start to set up a service VM as an IPv6 vRouter. For exemplary purpose, we assume: + +* The hostname of Open Daylight Controller Node is ``opnfv-odl-controller`` +* The hostname of OpenStack Controller Node is ``opnfv-os-controller`` +* The hostname of OpenStack Compute Node is ``opnfv-os-compute`` +* We use ``opnfv`` as username to login. +* We use ``devstack`` to install OpenStack Kilo, and the directory is ``~/devstack`` +* Note: all IP addresses as shown below are for exemplary purpose. + +*************************************************** +Source the Credentials in OpenStack Controller Node +*************************************************** + +**SETUP-SVM-1**: Login with username ``opnfv`` in OpenStack Controller Node ``opnfv-os-controller``. +Start a new terminal, and change directory to where OpenStack is installed. + + ``cd ~/devstack`` + +**SETUP-SVM-2**: Source the credentials. + + ``opnfv@opnfv-os-controller:~/devstack$ source openrc admin demo`` + +************************************** +Add External Connectivity to ``br-ex`` +************************************** + +Because we need to manually create networks/subnets to achieve the IPv6 vRouter, we have used the flag +``NEUTRON_CREATE_INITIAL_NETWORKS=False`` in ``local.conf`` file. When this flag is set to False, +``devstack`` does not create any networks/subnets during the setup phase. + +In OpenStack Controller Node ``opnfv-os-controller``, ``eth1`` is configured to provide external/public connectivity +for both IPv4 and IPv6. So let us add this interface to ``br-ex`` and move the IP address, including the default route +from ``eth1`` to ``br-ex``. + +**SETUP-SVM-3**: Add ``eth1`` to ``br-ex`` and move the IP address and the default route from ``eth1`` to ``br-ex`` + + ``sudo ip addr del <External IP address of opnfv-os-controller> dev eth1 && sudo ovs-vsctl add-port br-ex eth1 && +sudo ifconfig eth1 up && sudo ip addr add <External IP address of opnfv-os-controller> dev br-ex && sudo ifconfig +br-ex up && sudo ip route add default via <Default gateway IP address of opnfv-os-controller> dev br-ex`` + +* Note: This can be automated in /etc/network/interfaces. + +**SETUP-SVM-4**: Verify that ``br-ex`` now has the original external IP address, and that the default route is on +``br-ex`` + + ``opnfv@opnfv-os-controller:~/devstack$ ip a s br-ex`` +| 38: br-ex: <BROADCAST,UP,LOWER_UP> mtu 1430 qdisc noqueue state UNKNOWN group default +| link/ether 00:50:56:82:42:d1 brd ff:ff:ff:ff:ff:ff +| inet 198.59.156.113/24 brd 198.59.156.255 scope global br-ex +| valid_lft forever preferred_lft forever +| inet6 fe80::543e:28ff:fe70:4426/64 scope link +| valid_lft forever preferred_lft forever + + ``opnfv@opnfv-os-controller:~/devstack$ ip route`` +| default via 198.59.156.1 dev br-ex +| 10.134.156.0/24 dev eth0 proto kernel scope link src 10.134.156.113 +| 192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 +| 198.59.156.0/24 dev br-ex proto kernel scope link src 198.59.156.113 + +* Note: The IP addresses above are exemplary purpose + +******************************************************** +Create IPv4 Subnet and Router with External Connectivity +******************************************************** + +**SETUP-SVM-5**: Create a Neutron router ``ipv4-router`` which needs to provide external connectivity. + + ``neutron router-create ipv4-router`` + +**SETUP-SVM-6**: Create an external network/subnet ``ext-net`` using the appropriate values based on the +data-center physical network setup. + + ``neutron net-create --router:external ext-net`` + + ``neutron subnet-create --disable-dhcp --allocation-pool start=198.59.156.251,end=198.59.156.254 --gateway +198.59.156.1 ext-net 198.59.156.0/24`` + +* Note: The IP addresses in the command above are for exemplary purpose. **Please replace the IP addresses of +your actual network**. + +**SETUP-SVM-7**: Associate the ``ext-net`` to the Neutron router ``ipv4-router``. + + ``neutron router-gateway-set ipv4-router ext-net`` + +**SETUP-SVM-8**: Create an internal/tenant IPv4 network ``ipv4-int-network1`` + + ``neutron net-create ipv4-int-network1`` + +**SETUP-SVM-9**: Create an IPv4 subnet ``ipv4-int-subnet1`` in the internal network ``ipv4-int-network1`` + + ``neutron subnet-create --name ipv4-int-subnet1 --dns-nameserver 8.8.8.8 ipv4-int-network1 20.0.0.0/24`` + +* Note: The IP addresses in the command above are for exemplary purpose. **Please replace the IP addresses of your +actual network** + +**SETUP-SVM-10**: Associate the IPv4 internal subnet ``ipv4-int-subnet1`` to the Neutron router ``ipv4-router``. + + ``neutron router-interface-add ipv4-router ipv4-int-subnet1`` + +******************************************************** +Create IPv6 Subnet and Router with External Connectivity +******************************************************** + +Now, let us create a second neutron router where we can "manually" spawn a ``radvd`` daemon to simulate an external +IPv6 router. + +**SETUP-SVM-11**: Create a second Neutron router ``ipv6-router`` which needs to provide external connectivity + + ``neutron router-create ipv6-router`` + +**SETUP-SVM-12**: Associate the ``ext-net`` to the Neutron router ``ipv6-router`` + + ``neutron router-gateway-set ipv6-router ext-net`` + +**SETUP-SVM-13**: Create a second internal/tenant IPv4 network ``ipv4-int-network2`` + + ``neutron net-create ipv4-int-network2`` + +**SETUP-SVM-14**: Create an IPv4 subnet ``ipv4-int-subnet2`` for the ``ipv6-router`` internal network +``ipv4-int-network2`` + + ``neutron subnet-create --name ipv4-int-subnet2 --dns-nameserver 8.8.8.8 ipv4-int-network2 10.0.0.0/24`` + +* Note: The IP addresses in the command above are for exemplary purpose. **Please replace the IP addresses of +your actual network** + +**SETUP-SVM-15**: Associate the IPv4 internal subnet ``ipv4-int-subnet2`` to the Neutron router ``ipv6-router``. + + ``neutron router-interface-add ipv6-router ipv4-int-subnet2`` + +************************************************** +Prepare Image, Metadata and Keypair for Service VM +************************************************** + +**SETUP-SVM-16**: Download ``fedora20`` image which would be used as ``vRouter`` + + ``glance image-create --name 'Fedora20' --disk-format qcow2 --container-format bare --is-public true --copy-from http://cloud.fedoraproject.org/fedora-20.x86_64.qcow2`` + +**SETUP-SVM-17**: Create a keypair + + ``nova keypair-add vRouterKey > ~/vRouterKey`` + +**SETUP-SVM-18**: Copy the contents from the following url to ``metadata.txt``, i.e. preparing metadata which enables +IPv6 router functionality inside ``vRouter`` + + ``http://fpaste.org/303942/50781923/`` + +* Note: this ``metadata.txt`` will enable the ``vRouter`` to automatically spawn a ``radvd`` daemon, which advertises +its IPv6 subnet prefix ``2001:db8:0:2::/64`` in RA (Router Advertisement) message through its ``eth1`` interface to +other VMs on ``ipv4-int-network1``. The ``radvd`` daemon also advertises the routing information, which routes to +``2001:db8:0:2::/64`` subnet, in RA (Router Advertisement) message through its ``eth0`` interface to ``eth1`` +interface of ``ipv6-router`` on ``ipv4-int-network2``. + +********************************************************************************************************** +Boot Service VM (``vRouter``) with ``eth0`` on ``ipv4-int-network2`` and ``eth1`` on ``ipv4-int-network1`` +********************************************************************************************************** + +Let us boot the service VM (``vRouter``) ``eth0`` interface on ``ipv4-int-network2`` connecting to ``ipv6-router``, +and ``eth1`` interface on ``ipv4-int-network1`` connecting to ``ipv4-router``. + +**SETUP-SVM-19**: Boot the ``vRouter`` using ``Fedora20`` image on the OpenStack Compute Node with hostname +``opnfv-os-compute`` + + ``nova boot --image Fedora20 --flavor m1.small --user-data ./metadata.txt --availability-zone nova:opnfv-os-compute +--nic net-id=$(neutron net-list | grep -w ipv4-int-network2 | awk '{print $2}') +--nic net-id=$(neutron net-list | grep -w ipv4-int-network1 | awk '{print $2}') --key-name vRouterKey vRouter`` + +**SETUP-SVM-20**: Verify that ``Fedora20`` image boots up successfully and the ssh keys are properly injected + + ``nova list`` + + ``nova console-log vRouter`` + +* Note: It may take few minutes for the necessary packages to get installed and ssh keys to be injected. + + ``# Sample Output`` +| [ 762.884523] cloud-init[871]: ec2: ############################################################# +| [ 762.909634] cloud-init[871]: ec2: -----BEGIN SSH HOST KEY FINGERPRINTS----- +| [ 762.931626] cloud-init[871]: ec2: 2048 e3:dc:3d:4a:bc:b6:b0:77:75:a1:70:a3:d0:2a:47:a9 (RSA) +| [ 762.957380] cloud-init[871]: ec2: -----END SSH HOST KEY FINGERPRINTS----- +| [ 762.979554] cloud-init[871]: ec2: ############################################################# + +******************************************* +Boot Two Other VMs in ``ipv4-int-network1`` +******************************************* + +In order to verify that the setup is working, let us create two cirros VMs with ``eth1`` interface on the +``ipv4-int-network1``, i.e., connecting to ``vRouter`` ``eth1`` interface for internal network. + +We will have to configure appropriate ``mtu`` on the VMs' interface by taking into account the tunneling +overhead and any physical switch requirements. If so, push the ``mtu`` to the VM either using ``dhcp`` +options or via ``meta-data``. + +**SETUP-SVM-21**: Create VM1 on OpenStack Controller Node with hostname ``opnfv-os-controller`` + + ``nova boot --image cirros-0.3.4-x86_64-uec --flavor m1.tiny --nic net-id=$(neutron net-list | +grep -w ipv4-int-network1 | awk '{print $2}') +--availability-zone nova:opnfv-os-controller --key-name vRouterKey VM1`` + +**SETUP-SVM-22**: Create VM2 on OpenStack Compute Node with hostname ``opnfv-os-compute`` + + ``nova boot --image cirros-0.3.4-x86_64-uec --flavor m1.tiny --nic net-id=$(neutron net-list | +grep -w ipv4-int-network1 | awk '{print $2}') +--availability-zone nova:opnfv-os-compute --key-name vRouterKey VM2`` + +**SETUP-SVM-23**: Confirm that both the VMs are successfully booted. + + ``nova list`` + + ``nova console-log VM1`` + + ``nova console-log VM2`` + +********************************** +Spawn ``RADVD`` in ``ipv6-router`` +********************************** + +Let us manually spawn a ``radvd`` daemon inside ``ipv6-router`` namespace to simulate an external router. +First of all, we will have to identify the ``ipv6-router`` namespace and move to the namespace. + +**SETUP-SVM-24**: identify the ``ipv6-router`` namespace and move to the namespace + + ``sudo ip netns exec qrouter-$(neutron router-list | grep -w ipv6-router | awk '{print $2}') bash`` + +**SETUP-SVM-25**: Upon successful execution of the above command, you will be in the router namespace. +Now let us configure the IPv6 address on the <qr-xxx> interface. + + ``router_interface=$(ip a s | grep -w "global qr-*" | awk '{print $7}')`` + + ``ip -6 addr add 2001:db8:0:1::1 dev $router_interface`` + +**SETUP-SVM-26**: Copy the following contents to some file, e.g. ``/tmp/br-ex.radvd.conf`` + +.. code-block:: + + interface $router_interface + { + AdvSendAdvert on; + MinRtrAdvInterval 3; + MaxRtrAdvInterval 10; + prefix 2001:db8:0:1::/64 + { + AdvOnLink on; + AdvAutonomous on; + }; + }; + +**SETUP-SVM-27**: Spawn a ``radvd`` daemon to simulate an external router. This ``radvd`` daemon advertises its +IPv6 subnet prefix ``2001:db8:0:1::/64`` in RA (Router Advertisement) message through its ``eth1`` interface to +``eth0`` interface of ``vRouter`` on ``ipv4-int-network2``. + + ``$radvd -C /tmp/br-ex.radvd.conf -p /tmp/br-ex.pid.radvd -m syslog`` + +**SETUP-SVM-28**: Configure the ``$router_interface`` process entries to process the RA (Router Advertisement) +message from ``vRouter``, and automatically add a downstream route pointing to the LLA (Link Local Address) of +``eth0`` interface of the ``vRouter``. + +.. code-block:: + + sysctl -w net.ipv6.conf.$router_interface.accept_ra=2 + sysctl -w net.ipv6.conf.$router_interface.accept_ra_rt_info_max_plen=64 + +**SETUP-SVM-29**: Please note that after the vRouter successfully initializes and starts sending RA (Router +Advertisement) message (**SETUP-SVM-20**), you would see an IPv6 route to the ''2001:db8:0:2::/64'' prefix +(subnet) reachable via LLA (Link Local Address) of ``eth0`` interface of the ``vRouter``. You can execute the +following command to list the IPv6 routes. + + ``ip -6 route show`` + +******************************** +Testing to Verify Setup Complete +******************************** + +Now, let us ``ssh`` to one of the VMs, e.g. VM1, to confirm that it has successfully configured the IPv6 address +using ``SLAAC`` with prefix ``2001:db8:0:2::/64`` from ``vRouter``. + + * Note: You need to get the IPv4 address associated to VM1. This can be inferred from ``nova list`` command. + +**SETUP-SVM-30**: ``ssh`` VM1 + + ``ssh -i /home/odl/vRouterKey cirros@<VM1-IPv4-address>`` + +If everything goes well, ``ssh`` will be successful and you will be logged into VM1. Run some commands to verify +that IPv6 addresses are configured on ``eth0`` interface. + +**SETUP-SVM-31**: Show an IPv6 address with a prefix of ``2001:db8:0:2::/64`` + + ``ip address show`` + +**SETUP-SVM-32**: ping some external IPv6 address, e.g. ``ipv6-router`` + + ``ping6 2001:db8:0:1::1`` + +If the above ping6 command succeeds, it implies that ``vRouter`` was able to successfully forward the IPv6 traffic +to reach external ``ipv6-router``. + +**SETUP-SVM-33**: When all tests show that the setup works as expected, You can now exit the ``ipv6-router`` namespace. + + ``exit`` + +********** +Next Steps +********** + +Congratulations, you have completed the setup of using a service VM to act as an IPv6 vRouter. This setup allows further +open innovation by any 3rd-party. Please refer to relevant sections in User's Guide for further value-added services on +this IPv6 vRouter. + +******************************************************** +Sample Network Topology of this Setup through Horizon UI +******************************************************** + +The sample network topology of above setup is shown in Horizon UI as follows :numref:`figure3`: + +.. figure:: images/ipv6-sample-in-horizon.png + :name: figure3 + :width: 100% + + Sample Network Topology in Horizon UI + |