RHELOSP4 - Built on OpenStack Havana
20140424 - Looking to upgrade to Juno within the next month or so
Not overly popular course to look into upgrading the course content.
People doing development and then verbal training to other groups is the main ways to distribute knowledge
OpenStack Platform TerminologyNeutron - Only reason for neutron is if you need to compute to various other compute hosts where other instances are running. Neutron will supply them with managing the connections between those tunnels.
You wouldn't even need neutron if you had a single isolated host with guests on it.
Rally is a benchmarking tool that will allow you to try to configure a network node with appropriate bandwidth.
Packstack Installpackstack is basically an automated install environment where you generate a bunch of answers to installation questions kind of like kickstart for openstack.
In Ubuntu similar functionality is done via JuJu
yum install -y openstack-packstack
Generate answer files
packstack --gen-answer-file /root/answers.txt
Modify the answer file to your chosing and then use it to install openstack
packstack --answer-file /root/answers.txt
You can specify where you would like any of the nodes to exist in packstack by specifying IP addresses. You will need to be registered with a repo that has the associated packages required for the redhat installation though.
5-6 node limitation
Openstack Dashboard allowed hosts file
In the allowed hosts settings you can specify * to allow all hosts or else you will have to specify the FQDN in order to access or direct IP address.
Networking OverviewFind all of the namespaces associated
You will find a dhcp and a router namespace
Run commands against the namespace
ip netns qrouter-xxx-xxx ip a
NetworkManager service is not supported by OpenStack and we need to make sure it is not installed or disabled.
Removing IP Addresses from interfaces
ip address flush dev $interface
Open vSwitchTo show mac-address table on openvswitch
ovs-appctl fdb/show br-int
Information on ovs
No knowledge of GRE or VXLAN on linux bridges (some say you can get this knowledge implemented in bridges by updating linux kernel)
Linux Bridging with LibvirtLinux bridges can be created using libvirt and the configuration is stored/saved in libvirt configs rather than in /etc/sysconfig/network-scripts/
You can either create local bridges or you can change the forward mode to "route" and tie that to a particular interface of your choosing if you'd like to route traffic externally.
Otherwise all traffic will either be internal or NAT'ed.
You can also create DHCP pools inside of these virtual network bridges.
<ip address="126.96.36.199" netmask="255.255.255.0">
<range end="188.8.131.52" start="184.108.40.206">
virsh net-define testbridge.xml
virsh net-autostart private
virsh net-start private
Neutron Networking Overviewhttp://docs.openstack.org/admin-guide-cloud/content/figures/14/a/a/common/figures/under-the-hood-scenario-1-ovs-compute.png