====================================== Set up an IPv6 vRouter on a Service VM ====================================== | Here you will find the steps involved in creating a ServiceVM that acts as an IPv6 vRouter. In this example, we will be using a CentOS7 image as vRouter (we should be able to use other OS as well) and devstack for OpenStack installation. We need to enable Port Security Extension as the extension_drivers in ML2 configuration file. | Following is a sample configuration of devstack local.conf file. | **# [[local|localrc]]** | `DATA_DIR=$DEST/data` | `SCREEN_LOGDIR=$DATA_DIR/logs` | `LOGFILE=$SCREEN_LOGDIR/stack.sh.log` | `ADMIN_PASSWORD=password` | `MYSQL_PASSWORD=password` | `RABBIT_PASSWORD=password` | `SERVICE_PASSWORD=password` | `SERVICE_TOKEN=token` | `disable_service n-net tempest h-eng h-api h-api-cfn h-api-cw` | `enable_service q-svc q-dhcp q-meta q-agt q-l3 n-novnc` | **# [[post-config|/$Q_PLUGIN_CONF_FILE]]** | **# [ml2]** | `extension_drivers=port_security` | After successful installation of OpenStack with the above configuration, we shall create the necessary neutron networks/subnets/ports etc. | `cd devstack` | `./stack.sh` | # Source the tenant credentials. | `source openrc admin demo` | # Create a Neutron router which provides external connectivity. | `neutron router-create router1` | # Create an external network using the appropriate values based on the data-center physical network setup. | `neutron net-create --provider:network_type --provider:physical_network --provider:segmentation_id --router:external ext-net` | # Configure ipv6_gateway= in the Neutron L3 agent configuration file. | # Associate the ext-net to the neutron router. | `neutron router-gateway-set router1 ext-net` | # Create an IPv6 internal network. | `neutron net-create ipv6-internal-network` | # Create an IPv6 subnet in the internal network. | `neutron subnet-create --name ipv6-int-subnet --ip-version 6 --ipv6-ra-mode slaac --ipv6-address-mode slaac ipv6-internal-network 2001:db8:0:1::/64` | # Associate the internal subnet to a neutron router. | `neutron router-interface-add router1 ipv6-int-subnet` | Now we shall create an isolated network which is the internal network of vRouter. | # Create an isolated router for the tenant internal network. | `neutron router-create router2` | # Create a Neutron Internal Network. | `neutron net-create tenant-internal-network` | # Create an IPv4 subnet in the internal network. | `neutron subnet-create --name ipv4-int-subnet tenant-internal-network 10.0.0.1/24` | # Associate the router2 to IPv4 subnet created above. | `neutron router-interface-add ` | Mapping this configuration to `PoC-1`_. .. _`PoC-1`: /ipv6/images/ipv6-poc-1.png - `ipv6-internal-network and ext-net is the Red colored network.` - `tenant-internal-network is the Green colored network.` | Lets create two neutron ports one from ext-net and the other from tenant-internal-network for the vRouter VM | `neutron port-create ipv6-internal-network --port-security-enabled=False --name enp0s3-port` | `neutron port-create tenant-internal-network --port-security-enabled=False --name enp0s8-port` | Download the Centos7 image which is used as vRouter. | `glance image-create --name 'Centos7' --disk-format qcow2 --container-format bare --is-public true --copy-from http://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud.qcow2` | Create a keypair. | `nova keypair-add vRouterKey > ~/vRouterKey` | Spawn the Centos7 image with two nics (i.e., enp0s3-port and enp0s8-port) | `nova boot --image –flavor m1.small --nic port-id=$(neutron port-show -f value -F id enp0s3-port) –nic --nic port-id=$(neutron port-show -f value -F id enp0s8-port) --key-name vRouterKey CentOSvRouter` | Verify that CentOSvRouter boots up successfully and keypair is injected. | `nova list` | `nova console-log CentOSvRouter` | After the image boots up successfully, from the router1 namespace, ssh to vRouter using the keypair. | `sudo ip netns` | `sudo ip netns exec bash` | `ssh -i ~/vRouterKey centos@` | As a one time job, before we can create the snapshot, execute the steps (i.e., SLAAC setup) mentioned at the following link. | `https://wiki.opnfv.org/ipv6_opnfv_project/vm_as_router` | In order to verify that the setup is working, lets create some cirros VMs on the "tenant-internal-network" (i.e., vRouter internal network). | `nova boot --image --flavor m1.tiny --nic net-id= VM1` | `nova boot --image --flavor m1.tiny --nic net-id= VM2` | Confirm that both the VMs have successfully booted up. | `nova list` | `nova console-log VM1` | `nova console-log VM2` | Add the necessary security group ingress rules. | `source openrc demo demo` | # SSH access to the VMs | `neutron security-group-rule-create --direction ingress --protocol tcp --port-range-min 22 --port-range-max 22 --remote-ip-prefix 10.0.0.0/24 default` | # Permit IPv6 Router Advts from the vRouter internal interface to the VMs. | `neutron security-group-rule-create --direction ingress --ethertype IPv6 --protocol icmpv6 --port-range-min 134 --remote-ip-prefix fe80::/64 default` | SSH to the cirros VMs to check the IPv6 forwarding use-case. | `sudo ip netns` | `sudo ip netns exec bash` | `ssh cirros@` | Note: default password of cirros image would be "cubswin:)" | Verify that Cirros image has an IPv6 address assigned via SLAAC with a prefix of "2001:db8:0:2::/64" | `ip address` | # verify that default route points to the LLA of enp0s8 interface of vRouter. | `ip -6 route` | Try pinging to the internal router interface of router1 (i.e., 2001:db8:0:1::1/64) | `ping6 2001:db8:0:1::1/64` | If all goes well, ping6 should succeed which shows that vRouter is forwarding the IPv6 traffic of instances on the tenant-internal-network. | At this state, we can create a snapshot of the CentOSvRouter and use it in any other similar OpenStack setup. | `nova image-create ` | `nova image-list #You will find the snapshot you just created above.`