2. Build Controller Host¶

This page is based on the following OpenStack Installation Guide pages:

In this guide, I am using a Virtual Machine running on a VMWare hypervisor as my control node. If you are doing the same, you must ensure that the vSwitches on the hypervisor have “promiscuous mode” enabled.
Boot the control node with the CentOS 7.2.1511 DVD.
Set your time zone and language.
For “Software Selection”, set this to “Infrastructure Server”.
Keep automatic partitioning. Allow to install only on first disk.
Set the controller’s IPv4 address and hostname. Disable IPv6. Give the connection the name “eth1”.

Click on “Begin Installation”.
Set a good root password.
Once installation is complete, reboot the server, and remove the DVD/ISO from the server.
SSH in to server as root.

Stop and disable the firewalld service:

# systemctl disable firewalld.service
# systemctl stop firewalld.service

Disable SELINUX:

# setenforce 0
# vim /etc/sysconfig/selinux

  SELINUX=permissive

Update all packages on the server:
```
# yum update
```
If running the control node on VMWare, install the VM tools:
```
# yum install open-vm-tools
```

We need persistent network interface names, so we’ll configure udev to give us these. Replace 00:00:00:00:00:00 with the MAC addresses of your control node:

# vim /etc/udev/rules.d/90-persistent-net.rules

  SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",ATTR{address}=="00:00:00:00:00:00",ATTR{dev_id}=="0x0", ATTR{type}=="1",KERNEL=="eno*", NAME="eth0"
  SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",ATTR{address}=="00:00:00:00:00:00",ATTR{dev_id}=="0x0", ATTR{type}=="1",KERNEL=="eno*", NAME="eth1"

Note: This file is case-sensitive, and the MAC addresses should be lower-case.

Rename the network interface configuration files to eth0 and eth1. Replace eno00000001 and eno00000002 with the names of your control node’s interfaces:
```
# cd /etc/sysconfig/network-scripts
# mv ifcfg-eno00000001 ifcfg-eth0
# mv ifcfg-eno00000002 ifcfg-eth1
```
Modify the interface configuration files, replacing any instances of eno00000001 and eno00000002 (or whatever your interface names are) with eth0 and eth1 respectively:
```
# vim ifcfg-eth0

  NAME=eth0
  DEVICE=eth0

# vim ifcfg-eth1

  NAME=eth1
  DEVICE=eth1
```
Reboot the control node:
```
# systemctl reboot
```
SSH back in as root after the reboot.

Check that ifconfig now shows eth0 and eth1:

# ifconfig
  eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
          ether 00:0c:29:d9:36:46  txqueuelen 1000  (Ethernet)
          RX packets 172313  bytes 34438137 (32.8 MiB)
          RX errors 0  dropped 0  overruns 0  frame 0
          TX packets 7298  bytes 1552292 (1.4 MiB)
          TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

  eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
          inet 172.16.0.192  netmask 255.255.255.0  broadcast 172.16.0.255
          inet6 fe80::20c:29ff:fed9:3650  prefixlen 64  scopeid 0x20<link>
          ether 00:0c:29:d9:36:50  txqueuelen 1000  (Ethernet)
          RX packets 1487929  bytes 210511596 (200.7 MiB)
          RX errors 0  dropped 11  overruns 0  frame 0
          TX packets 781276  bytes 4320203416 (4.0 GiB)
          TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

  lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
          inet 127.0.0.1  netmask 255.0.0.0
          inet6 ::1  prefixlen 128  scopeid 0x10<host>
          loop  txqueuelen 0  (Local Loopback)
          RX packets 2462286  bytes 3417529317 (3.1 GiB)
          RX errors 0  dropped 0  overruns 0  frame 0
          TX packets 2462286  bytes 3417529317 (3.1 GiB)
          TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Update the system hosts file with entries for all nodes:

# vim /etc/hosts

16.0.192 controller controller.openstack.lab.eco.rackspace.com
16.0.203 compute1 compute1.openstack.lab.eco.rackspace.com
16.0.204 compute1-vm compute1-vm.openstack.lab.eco.rackspace.com
16.0.195 compute2 compute2.openstack.lab.eco.rackspace.com
16.0.196 block1 block1.openstack.lab.eco.rackspace.com
16.0.197 object1 object1.openstack.lab.eco.rackspace.com
16.0.198 object2 object2.openstack.lab.eco.rackspace.com

Update the “Chrony” (NTP Server) configuration to allow connections from our other nodes:
```
# vim /etc/chrony.conf

  Allow 172.16.0.0/24
```
Restart the Chrony service:
```
# systemctl restart chronyd.service
```

Enable the OpenStack-Liberty yum repository:

# yum install centos-release-openstack-liberty

Install the OpenStack client and SELINUX support:

# yum install python-openstackclient openstack-selinux