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How to use Dnsmasq for Linux host servers?
KVM: Using dnsmasq for libvirt DNS resolution On Linux host servers, libvirt uses a separate instance of dnsmasq for each virtual network. So if you want full name and reverse lookup for KVM guests on the default 192.168.122.0 network, you can configure this particular dnsmasq instance using virsh.
Is there a Dnsmasq instance for KVM guest?
So if you want full name and reverse lookup for KVM guests on the default 192.168.122.0 network, you can configure this particular dnsmasq instance using virsh.
How to use Dnsmasq for libvirt specific instances?
Although the configuration files for the libvirt instances is kept in the “/var/lib/libvirt/dnsmasq” directory, changes you make to these files will be overwritten, so modifying them directly is not an option – instead you need to use virsh. The libvirt specific instances of dnsmasq use the DNS server the host machine has defined as upstream.
Can a guest make a forward connection in libvirt?
By default, guests that are connected via a virtual network with can make any outgoing network connection they like. Incoming connections are allowed from the host, and from other guests connected to the same libvirt network, but all other incoming connections are blocked by iptables rules.
How does DNS resolve a virtual machine hostname?
To resolve a virtual machine’s hostname, the DNS server virtual machine must reside in the same virtual network and be configured to forward hostname queries to Azure. Because the DNS suffix is different in each virtual network, you can use conditional forwarding rules to send DNS queries to the correct virtual network for resolution.
How to validate a Dnsmasq instance in KVM?
Validate by doing a name and reverse lookup on this local dnsmasq instance. If you want to prove to yourself that the virtual network specific instances will use the host service instance for upstream, then do a ‘virsh net-edit default’ and remove the section and restart the default network.