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abbbi | i have setup an OVN network with a simple switch assigning dhcp addresses on the configured ports. How to setup DNS resolution? I have added an DNS record which is listed in the "ovn-sbctll ist DNS", but i fail to see how nodes which are connected to the ovn network are supposted to resolve? I read somewhere that the DNS requests are routed to the controller node by flow rules, but how does it work at | 07:25 |
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abbbi | all? | 07:25 |
numans | abbbi, Hi | 07:25 |
numans | abbbi, is the dns working as expected ? | 07:25 |
abbbi | numans: i dont understand the concept, which IP is going to be the DNS "server" in this network? A router which i have to add? The swich itself? | 07:26 |
numans | abbbi, the OVN internal DNS is a basic resolver for internal dns resolution i.e within the logical switch/router | 07:27 |
numans | abbbi, if you have configured dns for a logical switch, then the udp dns packet is sent to ovn-controller as packet-in. It checks the internal dns records present in the OVN southbound database. | 07:28 |
abbbi | numans: so that does only work if the system resolving is only part of the logical switch network and has no "external" dns server configured? | 07:28 |
numans | and if it finds, it sends a reply, otherwise the packet is resumed and if you hv configured an actual dns server in your deployment, it is expected to resolve it. | 07:29 |
numans | abbbi, yes. | 07:29 |
abbbi | ah ok, then i get it. The system i have configured a port on the logical switch is also part of another network. | 07:29 |
numans | abbbi, https://docs.openstack.org/project-deploy-guide/charm-deployment-guide/latest/app-ovn.html | 07:30 |
numans | you can grep for "Internal DNS resolution" | 07:30 |
numans | it has some details. | 07:30 |
numans | abbbi, although I'm not sure if you are using openstack or not. | 07:30 |
abbbi | yes, i had seen that, im not using openstack :) | 07:31 |
abbbi | but well, you just confirmed my thoughts so everything OK, then i will use something else for DNS, because all the systems that will be connected to the LS will also have another network with available DNS server connected. | 07:32 |
abbbi | doesnt make sense to use the internal dns resolver then | 07:32 |
numans | abbbi, ack. | 07:32 |
abbbi | thanks :) | 07:32 |
numans | welcome | 07:32 |
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