Error: IP already assigned

[jdmedeiros]

I installed LinK on 3 devices. On all 3 devices I have etcd working perfectly and on each device I run LinK:

On device 1 I run:

./link-client --user link --password Passw0rd add 172.31.56.111/32

and I get:

On device 2 I run the same command and I get:

Error: IP already assigned

Must be missing something. This is a very interesting concept, hence I would like to get it to work.

Error: IP already assigned

[EtienneM]

I currently fail to reproduce the problem you have here. Here is the steps I did to try to reproduce your problem:

1. Start LinK on my local work station:

   docker compose up

2. Add an IP to a first LinK agent:

   link-client --host localhost:1313 -u link -p password add 172.31.56.111/32
   link-client --host localhost:1313 -u link -p password list                
   +------------------------------------------+------------------+-----------+--------+
   |                    ID                    |        IP        |  STATUS   | CHECKS |
   +------------------------------------------+------------------+-----------+--------+
   | vip-5dc626b6-8faf-415d-ab68-fffed7fdb73b | 172.31.56.111/32 | ACTIVATED | None   |
   +------------------------------------------+------------------+-----------+--------+

3. Add the same IP to a second LinK agent:

   link-client --host localhost:1314 -u link -p password add 172.31.56.111/32
   link-client --host localhost:1313 -u link -p password list
   +------------------------------------------+------------------+-----------+--------+
   |                    ID                    |        IP        |  STATUS   | CHECKS |
   +------------------------------------------+------------------+-----------+--------+
   | vip-5dc626b6-8faf-415d-ab68-fffed7fdb73b | 172.31.56.111/32 | ACTIVATED | None   |
   +------------------------------------------+------------------+-----------+--------+
   link-client --host localhost:1314 -u link -p password list               
   +------------------------------------------+------------------+---------+--------+
   |                    ID                    |        IP        | STATUS  | CHECKS |
   +------------------------------------------+------------------+---------+--------+
   | vip-8a913cbf-003d-4aca-8ea0-70745cd2ced8 | 172.31.56.111/32 | STANDBY | None   |
   +------------------------------------------+------------------+---------+--------+

I understand this is not exactly the setup you have but that may be a way for you to investigate, by comparing the local configuration and the one you have on your servers.

The error "IP already assigned" is returned here:

https://github.com/Scalingo/link/blob/e99441bea7ba1dd8ed0b79a9f26d970bf1b56bd3/scheduler/scheduler.go#L74-L81

Are you sure your call to link-client to add the IP to a second agent targets the intended agent? Maybe explicit the agent to target with--host?