Dynamic IP¶

In my home network I do not have a static IP. So I have to be able to update my domain names to point to my dynamic IP. This is necessary to be able to access the services of my cluster from outside my network.

Note

It is also necessary to set up forwarding rules to your router, to forward the requests to the cluster.

For the purpose I have created a docker image that is using my dns provider api to update my IP when it changes.

Furthermore we are going to use external-dns to automatically update our dns.

kubectl create namespace general
kubectl -n general create secret generic gandi --from-literal=API_KEY=GANDITOKEN
kubectl apply -f ddns-anagno-me.yaml
kubectl apply -f ddns-anagno-dev.yaml

helm repo add external-dns https://kubernetes-sigs.github.io/external-dns/ 
helm repo update
helm install external-dns external-dns/external-dns -f values.yaml --namespace general --version 1.13.1

kubect apply -f vpa.yml

kubectl apply -f test.yaml
# test that everything works
kubectl delete -f test.yaml

Note

Initially the prometheus monitoring should not be activate until we deploy the monitoring stack. Afterwards we can activate it.

Usefull commands¶

kubectl --namespace general logs -f -l "app=ddns"

Note

Take a look at: https://docs.k8s-at-home.com/guides/dyndns/#creating-a-secret

Resources¶

https://github.com/kubernetes-sigs/external-dns
https://github.com/kubernetes-sigs/external-dns/issues/1394#issuecomment-585228684
https://github.com/kubernetes-sigs/external-dns/tree/438d06f3c45cf66d08945ae18d17e29c540d5c96/charts/external-dns
https://grafana.com/grafana/dashboards/15038-external-dns/