Installing Openstack Centos 7
Time to install Openstack on an Centos 7 server. This was my first meeting with Openstack and it took some time for gettings things up.
This would be a beginners guide to get you first server up and running.
I followed this page in my installation
https://openstack.redhat.com/Neutron_with_existing_external_network
My Openstack server has one NIC connect to my DMZ network and then routed out.
First install a Centos 7 minimal server and setup network
Time to install
Set correct hostname make shoure that you hostname is in the hostfile with you ip corrected my servername is openstack1.mydomain.com
10.100.0.50 openstack1 openstack1.mydomain.com 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 ~
Install the packages needed
sudo yum install -y http://rdo.fedorapeople.org/rdo-release.rpm sudo yum install -y openstack-packstack
sudo yum update
Reboot
sudo reboot
Install and setup Openstack RDO
packstack --allinone --provision-all-in-one-ovs-bridge=n
Setup the network
Create the file /etc/sysconfig/network-scripts/ifcfg-br-ex and add the following correct to you ip on host
DEVICE=br-ex DEVICETYPE=ovs TYPE=OVSBridge BOOTPROTO=static IPADDR=10.100.0.50 # Old eth0 IP since we want the network restart to not kill the connection, otherwise pick something outside your dhcp range NETMASK=255.255.255.0 # your netmask GATEWAY=10.100.0.1 # your gateway DNS1=10.100.0.1 # your nameserver ONBOOT=yes
Fix you eno1 file (My network are connect to eno1 interface) my looks like this
BOOTPROTO="none" IPV4_FAILURE_FATAL="no" IPV6INIT="yes" IPV6_AUTOCONF="yes" IPV6_DEFROUTE="yes" IPV6_FAILURE_FATAL="no" NAME="eno1" UUID="69dcfe19-4eab-41d2-afad-a10bd86c84b3" ONBOOT="yes" HWADDR="D8:9D:67:15:67:24" IPV6_PEERDNS="yes" IPV6_PEERROUTES="yes" TYPE=OVSPort DEVICETYPE=ovs OVS_BRIDGE=br-ex ONBOOT=yes
Open the file vi /etc/neutron/plugin.ini and add
under the [ml2_type_vxlan]
network_vlan_ranges = physnet1
and then add under that
[ovs] network_vlan_ranges = physnet1 bridge_mappings = physnet1:br-ex
Restart the network
systemctl restart network.service
sometimes I have problem when i restart my server the I have to run the network restart after the server is booted to get network running.
This can have some issues so that the network dies and have to be restarted to work.
Set up Openstack
Now you shuld have av openstack server up and running the admin password is found in /root/keystonerc_admin
Setup the Network
get access
source ~/keystonerc_admin
Clean out
neutron router-gateway-clear router1 neutron subnet-delete public_subnet
Add our exesting subnet as public
my exesting network is 10.100.0.0/24 and i want to use 10.100.0.200 to 10.100.0.220 to my server inside openstack
neutron subnet-create --name public_subnet --enable_dhcp=False --allocation-pool=start=10.100.0.200,end=10.100.0.220 --gateway=10.100.0.1 public 10.100.0.0/24
Add our router and private network
neutron router-gateway-set router1 public neutron net-create hostnet neutron subnet-create --name private_subnet --enable_dhcp=True --allocation-pool=start=10.0.0.2,end=10.0.0.200 hostnet 10.0.0.0/24 neutron router-gateway-set router1 hostnet <-- dont work read bellow
This could somethimes dont work but then you can login to openstack as admin and go to Project/network/routers
Add a router and conenct it to the public network. Then press the router and add new port and add it to the hostnet give it ip 10.0.0.1
you should have e network top that looks like this.
Time to add floating ip
in the openstack dashbourd go to project ->compute ->Access & security -> floating ip
add as many ip as you can i started now with only two that i need.
Set up keys
in the openstack dashbourd go to project ->compute ->Access & security -> key pairs
generate and se that you get the pem file to you computer.
Set up access to server
in the openstack dashbourd go to project ->compute ->Access & security -> security group
press manager rules and add rules for
icmp all both ingress / egress directions (two rules)
ssh allow rule
So the network part is OK now we need to set up some openstack
Install instance
Go to in the openstack dashbord projects ->compute -> instans
press launch instanse and give the host the following settings
name: cirrius flavor: tiny instance boot source:boot from image image:cirrius
Network:hostnet (ONLY THE HOSTNET !!!!!!!)
then press launch
Add flouting ip
assosiate a floting ip that we created before to the host
Test so that it works
loggin in to the instance and test so that you have network by pingen 8.8.8.8 and 10.0.0.1
it should work and you instanse should have internet access so lets test from external into the instance. From your openstack host ping you floting ip. and test to ssh into it.
And it should work and you have a working platform.
Error test to restart service in this order
[root@openstack1 mathem(keystone_admin)]# systemctl restart rabbitmq-server.service [root@openstack1 mathem(keystone_admin)]# systemctl restart openstack-swift-proxy.service [root@openstack1 mathem(keystone_admin)]# systemctl restart openstack-swift-object.service [root@openstack1 mathem(keystone_admin)]# systemctl restart openstack-swift-container.service [root@openstack1 mathem(keystone_admin)]# systemctl restart openstack-swift-account.service [root@openstack1 mathem(keystone_admin)]# systemctl restart openstack-ceilometer-api.service [root@openstack1 mathem(keystone_admin)]# systemctl restart openstack-ceilometer-api.service [root@openstack1 mathem(keystone_admin)]# systemctl restart neutron-server.service [root@openstack1 mathem(keystone_admin)]# systemctl restart mongod.service