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Chapter 9. Examples

Use the following examples to understand how to launch a compute instance post-deployment with various network configurations.

9.1. Example 1: Launching a Compute node with one NIC on the tenant and provider networks

Use this example to understand how to launch a Compute node with the private tenant network and the provider network after you deploy the all-in-one Red Hat OpenStack Platform environment. This example is based on a single NIC configuration and requires at least three IP addresses.

Prerequisites

To complete this example successfully, you must have the following IP addresses available in your environment:

One IP address for the OpenStack services.
One IP address for the virtual router to provide connectivity to the tenant network. This IP address is assigned automatically in this example.
At least one IP address for floating IPs on the provider network.

Procedure

Create configuration helper variables:

# standalone with tenant networking and provider networking
export OS_CLOUD=standalone
export GATEWAY=192.168.24.1
export STANDALONE_HOST=192.168.24.2
export PUBLIC_NETWORK_CIDR=192.168.24.0/24
export PRIVATE_NETWORK_CIDR=192.168.100.0/24
export PUBLIC_NET_START=192.168.24.4
export PUBLIC_NET_END=192.168.24.5
export DNS_SERVER=1.1.1.1

Create a basic flavor:

$ openstack flavor create --ram 512 --disk 1 --vcpu 1 --public tiny

Download CirrOS and create an OpenStack image:

$ wget https://download.cirros-cloud.net/0.4.0/cirros-0.4.0-x86_64-disk.img
$ openstack image create cirros --container-format bare --disk-format qcow2 --public --file cirros-0.4.0-x86_64-disk.img

Configure SSH:

$ ssh-keygen
$ openstack keypair create --public-key ~/.ssh/id_rsa.pub default

Create a simple network security group:
```
$ openstack security group create basic
```

Configure the new network security group:

Enable SSH:

$ openstack security group rule create basic --protocol tcp --dst-port 22:22 --remote-ip 0.0.0.0/0

Enable ping:

$ openstack security group rule create --protocol icmp basic

Enable DNS:

$ openstack security group rule create --protocol udp --dst-port 53:53 basic

Create Neutron networks:

$ openstack network create --external --provider-physical-network datacentre --provider-network-type flat public
$ openstack network create --internal private
$ openstack subnet create public-net \
    --subnet-range $PUBLIC_NETWORK_CIDR \
    --no-dhcp \
    --gateway $GATEWAY \
    --allocation-pool start=$PUBLIC_NET_START,end=$PUBLIC_NET_END \
    --network public
$ openstack subnet create private-net \
    --subnet-range $PRIVATE_NETWORK_CIDR \
    --network private

Create a virtual router:

# NOTE: In this case an IP will be automatically assigned
# from the allocation pool for the subnet.
$ openstack router create vrouter
$ openstack router set vrouter --external-gateway public
$ openstack router add subnet vrouter private-net

Create a floating IP:
```
$ openstack floating ip create public
```

Launch the instance:

$ openstack server create --flavor tiny --image cirros --key-name default --network private --security-group basic myserver

Assign the floating IP:
```
$ openstack server add floating ip myserver <FLOATING_IP>
```
Replace FLOATING_IP with the address of the floating IP that you create in a previous step.
Test SSH:
```
ssh cirros@<FLOATING_IP>
```
Replace FLOATING_IP with the address of the floating IP that you create in a previous step.

Network Architecture

Standalone1NIC Tenant Provider

9.2. Example 2: Launching a Compute node with one NIC on the provider network

Use this example to understand how to launch a Compute node with the provider network after you deploy the all-in-one Red Hat OpenStack Platform environment. This example is based on a single NIC configuration and requires at least four IP addresses.

Prerequisites

To complete this example successfully, you must have the following IP addresses available in your environment:

One IP address for the OpenStack services.
One IP address for the virtual router to provide connectivity to the tenant network. This IP address is assigned automatically in this example.
One IP address for DHCP on the provider network.
At least one IP address for floating IPs on the provider network.

Procedure

Create configuration helper variables:

# standalone with tenant networking and provider networking
export OS_CLOUD=standalone
export GATEWAY=192.168.24.1
export STANDALONE_HOST=192.168.24.2
export VROUTER_IP=192.168.24.3
export PUBLIC_NETWORK_CIDR=192.168.24.0/24
export PUBLIC_NET_START=192.168.24.4
export PUBLIC_NET_END=192.168.24.5
export DNS_SERVER=1.1.1.1

Create a basic flavor:

$ openstack flavor create --ram 512 --disk 1 --vcpu 1 --public tiny

Download CirrOS and create an OpenStack image:

$ wget https://download.cirros-cloud.net/0.4.0/cirros-0.4.0-x86_64-disk.img
$ openstack image create cirros --container-format bare --disk-format qcow2 --public --file cirros-0.4.0-x86_64-disk.img

Configure SSH:

$ ssh-keygen
$ openstack keypair create --public-key ~/.ssh/id_rsa.pub default

Create a simple network security group:
```
$ openstack security group create basic
```

Configure the new network security group:

Enable SSH:

$ openstack security group rule create basic --protocol tcp --dst-port 22:22 --remote-ip 0.0.0.0/0

Enable ping:

$ openstack security group rule create --protocol icmp basic

Enable DNS:

$ openstack security group rule create --protocol udp --dst-port 53:53 basic

Create Neutron networks:

$ openstack network create --external --provider-physical-network datacentre --provider-network-type flat public
$ openstack network create --internal private
$ openstack subnet create public-net \
    --subnet-range $PUBLIC_NETWORK_CIDR \
    --gateway $GATEWAY \
    --allocation-pool start=$PUBLIC_NET_START,end=$PUBLIC_NET_END \
    --network public \
    --host-route destination=169.254.169.254/32,gateway=$VROUTER_IP \
    --host-route destination=0.0.0.0/0,gateway=$GATEWAY \
    --dns-nameserver $DNS_SERVER

Create a virtual router:

# NOTE: In this case an IP will be automatically assigned
# from the allocation pool for the subnet.
$ openstack router create vrouter
$ openstack port create --network public --fixed-ip subnet=public-net,ip-address=$VROUTER_IP vrouter-port
$ openstack router add port vrouter vrouter-port

Launch the instance:

$ openstack server create --flavor tiny --image cirros --key-name default --network public --security-group basic myserver

Test SSH:
```
ssh cirros@<VM_IP>
```
Replace VM_IP with the address of the virtual machine that you create in the previous step.

Network Architecture

Standalone1NIC Provider

9.3. Example 3: Launching a Compute node with two NICs on the tenant and provider networks

Use this example to understand how to launch a Compute node with the private tenant network and the provider network after you deploy the all-in-one Red Hat OpenStack Platform environment. This example is based on a dual NIC configuration and requires at least three IP addresses on the provider network.

Prerequisites

One IP address for a gateway on the provider network.
One IP address for OpenStack endpoints.
One IP address for the virtual router to provide connectivity to the tenant network. This IP address is assigned automatically in this example.
At least one IP address for floating IPs on the provider network.

Procedure

Create configuration helper variables:

# standalone with tenant networking and provider networking
export OS_CLOUD=standalone
export GATEWAY=192.168.24.1
export STANDALONE_HOST=192.168.0.2
export PUBLIC_NETWORK_CIDR=192.168.24.0/24
export PRIVATE_NETWORK_CIDR=192.168.100.0/24
export PUBLIC_NET_START=192.168.0.3
export PUBLIC_NET_END=192.168.24.254
export DNS_SERVER=1.1.1.1

Create a basic flavor:

$ openstack flavor create --ram 512 --disk 1 --vcpu 1 --public tiny

Download CirrOS and create an OpenStack image:

$ wget https://download.cirros-cloud.net/0.4.0/cirros-0.4.0-x86_64-disk.img
$ openstack image create cirros --container-format bare --disk-format qcow2 --public --file cirros-0.4.0-x86_64-disk.img

Configure SSH:

$ ssh-keygen
$ openstack keypair create --public-key ~/.ssh/id_rsa.pub default

Create a simple network security group:
```
$ openstack security group create basic
```

Configure the new network security group:

Enable SSH:

$ openstack security group rule create basic --protocol tcp --dst-port 22:22 --remote-ip 0.0.0.0/0

Enable ping:

$ openstack security group rule create --protocol icmp basic

Enable DNS:

$ openstack security group rule create --protocol udp --dst-port 53:53 basic

Create Neutron networks:

$ openstack network create --external --provider-physical-network datacentre --provider-network-type flat public
$ openstack network create --internal private
$ openstack subnet create public-net \
    --subnet-range $PUBLIC_NETWORK_CIDR \
    --no-dhcp \
    --gateway $GATEWAY \
    --allocation-pool start=$PUBLIC_NET_START,end=$PUBLIC_NET_END \
    --network public
$ openstack subnet create private-net \
    --subnet-range $PRIVATE_NETWORK_CIDR \
    --network private

Create a virtual router:

# NOTE: In this case an IP will be automatically assigned
# from the allocation pool for the subnet.
$ openstack router create vrouter
$ openstack router set vrouter --external-gateway public
$ openstack router add subnet vrouter private-net

Create a floating IP:
```
$ openstack floating ip create public
```

Launch the instance:

$ openstack server create --flavor tiny --image cirros --key-name default --network private --security-group basic myserver

Assign the floating IP:
```
$ openstack server add floating ip myserver <FLOATING_IP>
```
Replace FLOATING_IP with the address of the floating IP that you create in a previous step.
Test SSH:
```
ssh cirros@<FLOATING_IP>
```
Replace FLOATING_IP with the address of the floating IP that you create in a previous step.

Network Architecture

Standalone2NIC Tenant Provider

이 콘텐츠는 선택한 언어로 제공되지 않습니다.

Chapter 9. Examples

9.1. Example 1: Launching a Compute node with one NIC on the tenant and provider networks

Prerequisites

Procedure

Network Architecture

9.2. Example 2: Launching a Compute node with one NIC on the provider network

Prerequisites

Procedure

Network Architecture

9.3. Example 3: Launching a Compute node with two NICs on the tenant and provider networks

Prerequisites

Procedure

Network Architecture

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