• Configure an AWS Load Balancer to target an Autoscaling Group using terraform

    3 min read

    Terraform AWS load balancer target auto scaling group

    It's quite convenient to be able to configure a AWS Load Balancer to target an Auto Scaling Group so we don't have to handle how instances are getting in and out of this load balancer. This can be done easily using terraform as follows

    04/05/2022

    Read more...

  • ALB Ingress: redirect traffic to HTTPS

    2 min read

    One of the beauties of using an ALB Ingress controller on AWS is that you can configure SSL certificates for your Ingress by just defining you want to use HTTPS

    apiVersion: extensions/v1beta1 kind: Ingress metadata:  annotations:  kubernetes.io/ingress.class: alb  alb.ingress.kubernetes.io/listen-ports: '[{"HTTP":80},{"HTTPS":443}]'

    But this is going to serve the same content using HTTP and HTTPS. Configuring a SSL redirect it is also pretty straightforward but involves two steps:

    22/03/2021

    Read more...

  • Error syncing load balancer: failed to ensure load balancer: could not find any suitable subnets for creating the ELB

    2 min read

    If we try to create a LoadBalancer on an AWS EKS cluster without any public subnet it will get stuck on the pending state and we won't get any external IP/DNS name for it. By using kubectl describe we will be able to get the actual error:

    $ kubectl get svc -n pet2cattle NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE demo-lb LoadBalancer 172.20.235.213 <pending> 80:30525/TCP 7d $ kubectl describe svc demo-lb -n pet2cattle  Name: demo-lb Namespace: pet2cattle Labels: <none> Annotations: <none> Selector: run=demo-lb Type: LoadBalancer IP Families: <none> IP: 172.20.166.181 IPs: <none> Port: <unset> 80/TCP TargetPort: 80/TCP NodePort: <unset> 30088/TCP Endpoints: 10.236.124.69:80,10.236.126.253:80 Session Affinity: None External Traffic Policy: Cluster Events:  Type Reason Age From Message  ---- ------ ---- ---- -------  Normal EnsuringLoadBalancer 12s (x3 over 27s) service-controller Ensuring load balancer  Warning SyncLoadBalancerFailed 12s (x3 over 27s) service-controller Error syncing load balancer: failed to ensure load balancer: could not find any suitable subnets for creating the ELB

    17/02/2021

    Read more...

From pet to cattle
Treat your kubernetes clusters like cattle, not pets