Lost connection of instances after reboot Nova-Network host......
The network connection of instance has been lost after restart Nova-Network host
In my consideration , all services should not affect others while restart/stop service within cloud platform...
That means instances connection should be alive while admin restart nova-network host , but it won't work as your expectation. I faced this issue one month ago. And I spend around 1 hour to understand what's going on with this problem.
In regular nova deployment , nova-network host is the gateway of all instances. This Linux network box works like a router. So that has a ARP table over the box.
In my test , if the flat_interface(or vlan_interface) do not auto up after reboot , the box will lose ARP table. And you can not ping or ssh instance anymore. While you up the nic manually , you have to wait for ARP rebuild .
In my consideration , all services should not affect others while restart/stop service within cloud platform...
That means instances connection should be alive while admin restart nova-network host , but it won't work as your expectation. I faced this issue one month ago. And I spend around 1 hour to understand what's going on with this problem.
In regular nova deployment , nova-network host is the gateway of all instances. This Linux network box works like a router. So that has a ARP table over the box.
In my test , if the flat_interface(or vlan_interface) do not auto up after reboot , the box will lose ARP table. And you can not ping or ssh instance anymore. While you up the nic manually , you have to wait for ARP rebuild .