Question

How to specify multiple hostnames in ingress-nginx @do-loadbalancer-hostname

Hi,

I am following https://www.digitalocean.com/community/tutorials/how-to-set-up-an-nginx-ingress-with-cert-manager-on-digitalocean-kubernetes#step-5-—-enabling-pod-communication-through-the-load-balancer-(optional) to setup TLS in my cluster. I have 2 host names web.myapp.com and api.myapp.com I want to have both of these subdomains to be added in my nginx annotation.

service.beta.kubernetes.io/do-loadbalancer-hostname

I cant give comma seperated as it is throughing below warnings:

Warning  SyncLoadBalancerFailed  4s (x2 over 9s)     service-controller  Error syncing load balancer: failed to update load balancer status: Service "ingress-nginx-controller" is invalid: status.loadBalancer.ingress[0].hostname: Invalid value: "web.myapp.co.za,api.myapp.co.za": a DNS-1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')

Thanks in advance


Submit an answer

This textbox defaults to using Markdown to format your answer.

You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

Sign In or Sign Up to Answer

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

Want to learn more? Join the DigitalOcean Community!

Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in Q&A, subscribe to topics of interest, and get courses and tools that will help you grow as a developer and scale your project or business.

Hi @ratnautilman,

Having the LB hostname annotation on a service is solely used for getting around internal routing issues as specified in our docs: Accessing by Hostname :: How to Configure Advanced Load Balancer Settings in Kubernetes Clusters

As long as your multiple hostnames resolve to the LB in question and a single hostname is set using the annotation, you will not experience the issue described in the docs link above. Other than the bug listed in the docs, there is no technical reason to need to specify this annotation for more than one hostname.

Hope this helps!

Regards,

John Kwiatkoski Senior Developer Support Engineer - Kubernetes