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| gfa | klindgren: do you mean importing external dhcp leases to neutron? like you moved a network to neutron's control and you want to keep some dhcp assignments | 05:26 |
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| klindgren | gfa - not really | 15:22 |
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| klindgren | gfa - Under out network we have many L2 segments, where L2 doesn't leave a rack. Because of this we have servers dedicated to dhcp/metadata/glance within each rack. I want to move away from doing this and centralize the dhcp/glance services and move metadata down to each compute node. The issue is that neutron two fold - first neutron is deprecating running dhcp_agent outside of a name space. So this means that each L2 | 15:27 |
| klindgren | network is going to need its own dhcp namespace on the consolidated server and neutron expects it to be directly tied into the network via L2 . This is a problem because we are planning on using dhcp_helper on the switches to forward the dhcp requests to the central server, this will turn the broadcast dhcp into a unicast request directly to/from the switch to the configured ip. So as far asI can tell unless I do some craz | 15:27 |
| klindgren | yness with creating a new nat ip per network or something else this configuration will never work under neutron. | 15:27 |
| klindgren | Which is stupid because centralizing dhcp to a single server is kinda something thats been done in it for 10+ years. | 15:27 |
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| mgagne | klindgren: +1 to that | 16:42 |
| mgagne | klindgren: each time I tell my netadmin that openstack can't do X, he always tells me: "Told you, OpenStack isn't mature" and it's bugging me | 16:44 |
| klindgren | I think I am going to go into full on retard/crazyness mode to get something working | 16:45 |
| klindgren | even if I end up with a bridge of bridges and iptables rules to change unicasts into broadcasts so it hits all the dhcp servers | 16:46 |
| mgagne | we all end up switching to retard mode =) | 16:46 |
| WormMan | the problem is that openstack can always do X, it just may take 10,000 lines of code to do it :) | 16:46 |
| mgagne | or the devops way :D /s | 16:46 |
| klindgren | eh this seems to be more like - instead of running a dhcp per network on an agent | 16:46 |
| klindgren | just stuff the entire config into the same dnsmasq agent | 16:46 |
| klindgren | that doesn't seem like a huge change | 16:47 |
| WormMan | klindgren: I'd recommend using a proper dhcp server at that point :) | 16:47 |
| mgagne | is dhcp agent pluggable? what if I have an appliance? | 16:47 |
| klindgren | honestly - also debating stopping to provide dhcp services all together | 16:47 |
| WormMan | (when we were setting up nova multihost I considered a dnsmasq wrapper to do just that and run one isc-dhcpd instead of a dnsmasq per vlan) | 16:47 |
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| klindgren | Does anyone here - who runs a public cloud - do extra policing of vm's to prevent outbound DoS attacks? | 17:22 |
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| alejandrito | Hi guys, just one existence question. suppose im a public cloud provider, how can i handle the amazon like "public address" assigment taking into account that "floating IP" has an internal ip addres space, so, what are the best practices to do a floatingIP -> public internet address, like for example take advantage of my few public ips, but using une public to, for example, redirect traffic to specific tenants floating | 17:41 |
| alejandrito | IPS. any experience on this ? | 17:41 |
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| klindgren | what do you mean that floating_ips have internal ip address space? also, what do you mean by redirecting traffic to specific tenants floating ips? | 17:45 |
| klindgren | Floating ip's as implemented map an ip from a network (either rfc1918 space or "real" ip address space) to another network. Which is done via a 1-1 nat on the router object that is created. | 17:47 |
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| serverascode | alejandrito: we don't yet but I imagine at some point we'll have to | 18:44 |
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