Removed note markup from content in the network assumptions list of OpenStack Networking (neutron). Fixed instances of capital "i" in internet. Change-Id: Iea98b9b35a470ef9fc752de26e8b05b15f73424d Closes-Bug: #1494575
13 KiB
OpenStack Networking (neutron)
The example architecture with OpenStack Networking (neutron) requires
one controller node, one network node, and at least one compute node.
The controller node contains one network interface on the management network
. The
network node contains one network interface on the management network,
one on the instance tunnels network
, and one on the external network
. The
compute node contains one network interface on the management network
and one on the instance tunnels network.
The example architecture assumes use of the following networks:
Management on 10.0.0.0/24 with gateway 10.0.0.1
This network requires a gateway to provide internet access to all nodes for administrative purposes such as package installation, security updates,
DNS
, andNetwork Time Protocol (NTP)
.Instance tunnels on 10.0.1.0/24 without a gateway
This network does not require a gateway because communication only occurs among network and compute nodes in your OpenStack environment.
External on 203.0.113.0/24 with gateway 203.0.113.1
This network requires a gateway to provide internet access to instances in your OpenStack environment.
You can modify these ranges and gateways to work with your particular network infrastructure.
Note
Network interface names vary by distribution. Traditionally, interfaces use "eth" followed by a sequential number. To cover all variations, this guide simply refers to the first interface as the interface with the lowest number, the second interface as the interface with the middle number, and the third interface as the interface with the highest number.
Unless you intend to use the exact configuration provided in this
example architecture, you must modify the networks in this procedure to
match your environment. Also, each node must resolve the other nodes by
name in addition to IP address. For example, the controller
name must resolve to 10.0.0.11
, the IP address of the
management interface on the controller node.
Warning
Reconfiguring network interfaces will interrupt network connectivity. We recommend using a local terminal session for these procedures.
Controller node
To configure networking:
Configure the first interface as the management interface:
IP address: 10.0.0.11
Network mask: 255.255.255.0 (or /24)
Default gateway: 10.0.0.1
Reboot the system to activate the changes.
To configure name resolution:
Set the hostname of the node to
controller
.Edit the
/etc/hosts:
file to contain the following:# controller 10.0.0.11 controller # network 10.0.0.21 network # compute1 10.0.0.31 compute1
Warning
Some distributions add an extraneous entry in the
/etc/hosts
file that resolves the actual hostname to another loopback IP address such as127.0.1.1
. Note it's127.0.*1.1*
, do not remove the required127.0.0.1
entry. You must comment out or remove this entry to prevent name resolution problems.
Network node
To configure networking:
Configure the first interface as the management interface:
IP address: 10.0.0.21
Network mask: 255.255.255.0 (or /24)
Default gateway: 10.0.0.1
Configure the second interface as the instance tunnels interface:
IP address: 10.0.1.21
Network mask: 255.255.255.0 (or /24)
The external interface uses a special configuration without an IP address assigned to it. Configure the third interface as the external interface:
Replace
INTERFACE_NAME
with the actual interface name. For example, eth2 or ens256.ubuntu or debian
Edit the
/etc/network/interfaces
file to contain the following:# The external network interface auto INTERFACE_NAME iface INTERFACE_NAME inet manual up ip link set dev $IFACE up down ip link set dev $IFACE down
rdo
Edit the
/etc/sysconfig/network-scripts/ifcfg-INTERFACE_NAME
file to contain the following:Do not change the
HWADDR
andUUID
keys.DEVICE= INTERFACE_NAME TYPE=Ethernet ONBOOT="yes" BOOTPROTO="none"
obs
Edit the
/etc/sysconfig/network/ifcfg-INTERFACE_NAME
file to contain the following:STARTMODE='auto' BOOTPROTO='static'
Reboot the system to activate the changes.
To configure name resolution:
Set the hostname of the node to
network
.Edit the
/etc/hosts
file to contain the following:# network 10.0.0.21 network # controller 10.0.0.11 controller # compute1 10.0.0.31 compute1
Warning
Some distributions add an extraneous entry in the
/etc/hosts
file that resolves the actual hostname to another loopback IP address such as127.0.1.1
. Note it's127.0.*1.1*
, do not remove the required127.0.0.1
entry. You must comment out or remove this entry to prevent name resolution problems.
Compute node
To configure networking:
Configure the first interface as the management interface:
IP address: 10.0.0.31
Network mask: 255.255.255.0 (or /24)
Default gateway: 10.0.0.1
Note
Additional compute nodes should use 10.0.0.32, 10.0.0.33, and so on.
Configure the second interface as the instance tunnels interface:
IP address: 10.0.1.31
Network mask: 255.255.255.0 (or /24)
Note
Additional compute nodes should use 10.0.1.32, 10.0.1.33, and so on.
Reboot the system to activate the changes.
To configure name resolution:
Set the hostname of the node to
compute1
.Edit the
/etc/hosts
file to contain the following:# compute1 10.0.0.31 compute1 # controller 10.0.0.11 controller # network 10.0.0.21 network
Warning
Some distributions add an extraneous entry in the
/etc/hosts
file that resolves the actual hostname to another loopback IP address such as127.0.1.1
. You must comment out or remove this entry to prevent name resolution problems.
Verify connectivity
We recommend that you verify network connectivity to the internet and among the nodes before proceeding further.
From the controller node,
ping
a site on the internet:# ping -c 4 openstack.org PING openstack.org (174.143.194.225) 56(84) bytes of data. 64 bytes from 174.143.194.225: icmp_seq=1 ttl=54 time=18.3 ms 64 bytes from 174.143.194.225: icmp_seq=2 ttl=54 time=17.5 ms 64 bytes from 174.143.194.225: icmp_seq=3 ttl=54 time=17.5 ms 64 bytes from 174.143.194.225: icmp_seq=4 ttl=54 time=17.4 ms --- openstack.org ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3022ms rtt min/avg/max/mdev = 17.489/17.715/18.346/0.364 ms
From the controller node,
ping
the management interface on the network node:# ping -c 4 network PING network (10.0.0.21) 56(84) bytes of data. 64 bytes from network (10.0.0.21): icmp_seq=1 ttl=64 time=0.263 ms 64 bytes from network (10.0.0.21): icmp_seq=2 ttl=64 time=0.202 ms 64 bytes from network (10.0.0.21): icmp_seq=3 ttl=64 time=0.203 ms 64 bytes from network (10.0.0.21): icmp_seq=4 ttl=64 time=0.202 ms --- network ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3000ms rtt min/avg/max/mdev = 0.202/0.217/0.263/0.030 ms
From the controller node,
ping
the management interface on the compute node:# ping -c 4 compute1 PING compute1 (10.0.0.31) 56(84) bytes of data. 64 bytes from compute1 (10.0.0.31): icmp_seq=1 ttl=64 time=0.263 ms 64 bytes from compute1 (10.0.0.31): icmp_seq=2 ttl=64 time=0.202 ms 64 bytes from compute1 (10.0.0.31): icmp_seq=3 ttl=64 time=0.203 ms 64 bytes from compute1 (10.0.0.31): icmp_seq=4 ttl=64 time=0.202 ms --- network ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3000ms rtt min/avg/max/mdev = 0.202/0.217/0.263/0.030 ms
From the network node,
ping
a site on the internet:# ping -c 4 openstack.org PING openstack.org (174.143.194.225) 56(84) bytes of data. 64 bytes from 174.143.194.225: icmp_seq=1 ttl=54 time=18.3 ms 64 bytes from 174.143.194.225: icmp_seq=2 ttl=54 time=17.5 ms 64 bytes from 174.143.194.225: icmp_seq=3 ttl=54 time=17.5 ms 64 bytes from 174.143.194.225: icmp_seq=4 ttl=54 time=17.4 ms --- openstack.org ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3022ms rtt min/avg/max/mdev = 17.489/17.715/18.346/0.364 ms
From the network node,
ping
the management interface on the controller node:# ping -c 4 controller PING controller (10.0.0.11) 56(84) bytes of data. 64 bytes from controller (10.0.0.11): icmp_seq=1 ttl=64 time=0.263 ms 64 bytes from controller (10.0.0.11): icmp_seq=2 ttl=64 time=0.202 ms 64 bytes from controller (10.0.0.11): icmp_seq=3 ttl=64 time=0.203 ms 64 bytes from controller (10.0.0.11): icmp_seq=4 ttl=64 time=0.202 ms --- controller ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3000ms rtt min/avg/max/mdev = 0.202/0.217/0.263/0.030 ms
From the network node,
ping
the instance tunnels interface on the compute node:# ping -c 4 10.0.1.31 PING 10.0.1.31 (10.0.1.31) 56(84) bytes of data. 64 bytes from 10.0.1.31 (10.0.1.31): icmp_seq=1 ttl=64 time=0.263 ms 64 bytes from 10.0.1.31 (10.0.1.31): icmp_seq=2 ttl=64 time=0.202 ms 64 bytes from 10.0.1.31 (10.0.1.31): icmp_seq=3 ttl=64 time=0.203 ms 64 bytes from 10.0.1.31 (10.0.1.31): icmp_seq=4 ttl=64 time=0.202 ms --- 10.0.1.31 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3000ms rtt min/avg/max/mdev = 0.202/0.217/0.263/0.030 ms
From the compute node,
ping
a site on the internet:# ping -c 4 openstack.org PING openstack.org (174.143.194.225) 56(84) bytes of data. 64 bytes from 174.143.194.225: icmp_seq=1 ttl=54 time=18.3 ms 64 bytes from 174.143.194.225: icmp_seq=2 ttl=54 time=17.5 ms 64 bytes from 174.143.194.225: icmp_seq=3 ttl=54 time=17.5 ms 64 bytes from 174.143.194.225: icmp_seq=4 ttl=54 time=17.4 ms --- openstack.org ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3022ms rtt min/avg/max/mdev = 17.489/17.715/18.346/0.364 ms
From the compute node,
ping
the management interface on the controller node:# ping -c 4 controller PING controller (10.0.0.11) 56(84) bytes of data. 64 bytes from controller (10.0.0.11): icmp_seq=1 ttl=64 time=0.263 ms 64 bytes from controller (10.0.0.11): icmp_seq=2 ttl=64 time=0.202 ms 64 bytes from controller (10.0.0.11): icmp_seq=3 ttl=64 time=0.203 ms 64 bytes from controller (10.0.0.11): icmp_seq=4 ttl=64 time=0.202 ms --- controller ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3000ms rtt min/avg/max/mdev = 0.202/0.217/0.263/0.030 ms
From the compute node,
ping
the instance tunnels interface on the network node:# ping -c 4 10.0.1.21 PING 10.0.1.21 (10.0.1.21) 56(84) bytes of data. 64 bytes from 10.0.1.21 (10.0.1.21): icmp_seq=1 ttl=64 time=0.263 ms 64 bytes from 10.0.1.21 (10.0.1.21): icmp_seq=2 ttl=64 time=0.202 ms 64 bytes from 10.0.1.21 (10.0.1.21): icmp_seq=3 ttl=64 time=0.203 ms 64 bytes from 10.0.1.21 (10.0.1.21): icmp_seq=4 ttl=64 time=0.202 ms --- 10.0.1.21 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3000ms rtt min/avg/max/mdev = 0.202/0.217/0.263/0.030 ms