I’m having to launch docker containers via docker’s API to handle backups and I want to be able to reference services via the internal DNS service. For example, I have a mail stack and a service called db. If I run the following docker run command on one of my hosts, I fail to contact the service:
docker run --rm -it -l io.rancher.container.network=“true” --dns 169.254.169.250 --dns-search rancher.internal alpine:edge ping -c 3 db.mail
Is there something I’m missing to get the container to use the internal DNS service? I want to use the docker API so the containers clean themselves up when completed since I did not see an equivalent in the Rancher API.