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---
tags:
- work
---
# Previous IP migration API
Stateful: sqlite db:
- subnet state (mode: `migrating`)
- ip state: active location (`CPH|AMS`)
config:
- LR map file
- db config
- tls
- ip announcement file
- hosts
- key
- user
IP announcement file.
Flow:
- Prepare subnet (out-of-band)
- Creates a record for the subnet, and puts it in "migrating" mode.
- Call migrate IP (ip, dest)
- Fails if subnet not prepared prior.
- Fails if destination not exists.
- Fails if invalid ip address
# New IP migration API
What is a "link scope"?
API:
- Prepare subnet : cidr
- Migrate IP
- os set allowed address pair
- tun src: add /32
- Migrate gateway
Kevin meet:
tunnel-dst vm in openstack
tunnel-src hardware ding
puppet op tunnels
stap 1 paars = api doet: op os router route voor elk ip in subnet aanmaken en proxy arp shit per subnet. AllowedAddrPair op port tunnel-dst. In eerste instantie gewoon alle IPs uit het subnet toevoegen.
Beide IPv4 en IPv6 (6 kan iets later)
Alle stappen moeten reversable zijn.
stap 2 roze: test vm, routes op os verwijderen, op src net toevoegen
stap 3 geel: switch network naar openstack, switch gateway ip
**How ARP works**
Host A thinks it has direct conn to Host B, thus sends ARP request to learn its MAC.
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