Instance Failing to Initialize Networking (Unable to Receive DHCP Response)
Problem
- Instance is failing to boot or be reachable.
- No DHCP reply is received.
- DHCP request is observed on both the physical (e.g. bond0) interface of both the hypervisor, and designated DHCP agent host(s).
Environment
- Platform9 Managed OpenStack - All Versions
Cause
Either on which the hypervisor on which the instance resides, or one of the associated hosts of the designated DHCP agents for the given network, the Linux/OVS bridge which is defined as part of the bridge_mappings variable in /opt/pf9/etc/pf9-neutron-ovs-agent/ml2.conf
is either invalid, or the bridge has no associated physical interface (e.g. bond0).
Resolution
- Ensure that
bridge_mappings
in the/opt/pf9/etc/pf9-neutron-ovs-agent/ml2_conf.ini
configuration file on the affected host (whether the hypervisor, or DHCP host) has the correct physical interface name specified. - If it has been modified, restart the
pf9-neutron-ovs-agent
service. - Otherwise, ensure the physical interface is added to the specified interface, e.g.
ovs-vsctl add-port br-pf9 bond0
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