openstack octavia: How do requests get routed to instances?

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Still trying to figure out how Octavia is supposed to work. Here is what I tried:

I set up a HTTP load balancer on port 80.

I created a pool for the load balancer and added servers to that pool.

When I log into the loadbalancer, there's nothing listening there on port 80.

So there's something fundamentally missing in my understanding.

How do the requests get routed? I send the http request to port 80 on my LB vip address. What happens next? (What mechanism is used to forward the request to a back end server?) I don't see any software switch running on the loadbalancer instance.

UPDATE

I got the thing working finally but I still have no idea how it works. I send a HTTP request to the loadbalancer VIP on port 80, it gets routed magically to the backend (member).

I looked around in the loadbalancer namespace, I see a HA-proxy agent running there. However, when I netstat -a I see nothing listening on port 80.

How does the request make its way from the Loadbalancer front end to the pool member?

I'd like to know conceptually, how this works. Any insights would be greatly appreciated.

Thanks for your help.

Ranga

edited Nov 20 at 0:12

asked Nov 19 at 17:48

LostInTheFrequencyDomain

584422

add a comment |

up vote
0
down vote

favorite

Still trying to figure out how Octavia is supposed to work. Here is what I tried:

I set up a HTTP load balancer on port 80.

I created a pool for the load balancer and added servers to that pool.

When I log into the loadbalancer, there's nothing listening there on port 80.

So there's something fundamentally missing in my understanding.

UPDATE

I got the thing working finally but I still have no idea how it works. I send a HTTP request to the loadbalancer VIP on port 80, it gets routed magically to the backend (member).

I looked around in the loadbalancer namespace, I see a HA-proxy agent running there. However, when I netstat -a I see nothing listening on port 80.

How does the request make its way from the Loadbalancer front end to the pool member?

I'd like to know conceptually, how this works. Any insights would be greatly appreciated.

Thanks for your help.

Ranga

edited Nov 20 at 0:12

asked Nov 19 at 17:48

LostInTheFrequencyDomain

584422

add a comment |

up vote
0
down vote

favorite

Still trying to figure out how Octavia is supposed to work. Here is what I tried:

I set up a HTTP load balancer on port 80.

I created a pool for the load balancer and added servers to that pool.

When I log into the loadbalancer, there's nothing listening there on port 80.

So there's something fundamentally missing in my understanding.

UPDATE

I got the thing working finally but I still have no idea how it works. I send a HTTP request to the loadbalancer VIP on port 80, it gets routed magically to the backend (member).

I looked around in the loadbalancer namespace, I see a HA-proxy agent running there. However, when I netstat -a I see nothing listening on port 80.

How does the request make its way from the Loadbalancer front end to the pool member?

I'd like to know conceptually, how this works. Any insights would be greatly appreciated.

Thanks for your help.

Ranga

edited Nov 20 at 0:12

asked Nov 19 at 17:48

LostInTheFrequencyDomain

584422

Still trying to figure out how Octavia is supposed to work. Here is what I tried:

I set up a HTTP load balancer on port 80.

I created a pool for the load balancer and added servers to that pool.

When I log into the loadbalancer, there's nothing listening there on port 80.

So there's something fundamentally missing in my understanding.

UPDATE

I got the thing working finally but I still have no idea how it works. I send a HTTP request to the loadbalancer VIP on port 80, it gets routed magically to the backend (member).

I looked around in the loadbalancer namespace, I see a HA-proxy agent running there. However, when I netstat -a I see nothing listening on port 80.

How does the request make its way from the Loadbalancer front end to the pool member?

I'd like to know conceptually, how this works. Any insights would be greatly appreciated.

Thanks for your help.

Ranga

openstack openstack-neutron

edited Nov 20 at 0:12

asked Nov 19 at 17:48

LostInTheFrequencyDomain

584422

edited Nov 20 at 0:12

asked Nov 19 at 17:48

LostInTheFrequencyDomain

584422

edited Nov 20 at 0:12

asked Nov 19 at 17:48

LostInTheFrequencyDomain

584422

asked Nov 19 at 17:48

LostInTheFrequencyDomain

584422

asked Nov 19 at 17:48

LostInTheFrequencyDomain

584422

add a comment |

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