Currently, I’m actively working on our AWS infrastructure costs optimization and will post a series of posts about this. The first one will be about AWS RDS Reserved Instances. The idea is quite simple: you are committing to use some types of instances for one or three years. Here, you’ll be able to choose to… Read More »
⚙️ On April 20-22th, join DevOps Days Kyiv – a free online conference focused on the DevOps Culture. Meet experts from Google, VMWare, PagerDuty, and co-creator of Kubernetes – Joe Beda. 💻 What to expect: 5 talks about DevOps culture fireside chat with co-creator of Kubernetes – Joe Beda, fill in your questions for Joe… Read More »
Istio is a Service Mesh solution that allows performing Service Discovery, Load Balancing, traffic control, canary rollouts and blue-green deployments, traffic monitoring between microservices. We will use Istio in our AWS Elastic Kubernetes Service for traffic monitoring, as an API Gateway service, for traffic policies, and for various deployment strategies. In this post, will speak… Read More »
We have an ExternalDNS service running, see the Kubernetes: update AWS Route53 DNS from an Ingress post, which started sending a lot of messages like: msg=”failed to list resource records sets for zone /hostedzone/Z2VM3W5SRY4I9J: Throttling: \n\tstatus code: 400 And even AWS Console in the Route53 says “Throttling error that was caused because API rate was… Read More »
We have a Kubernetes Cluster Autoscaler for AWS EC2 WorkerNode groups scaling. On our Dev cluster sometimes it stop working with the following message in its logs: [simterm] … E0331 08:57:52.264549 1 leaderelection.go:320] error retrieving resource lock kube-system/cluster-autoscaler: Get https://172.20.0.1:443/apis/coordination.k8s.io/v1/namespaces/kube-system/leases/cluster-autoscaler: context deadline exceeded I0331 08:58:14.468096 1 leaderelection.go:277] failed to renew lease kube-system/cluster-autoscaler: timed out waiting… Read More »
Faced with a very interesting thing during removal of a Kubernetes Namespace. After a kubectl delete namespace NAMESPACE is executed, the namespace hangs in the Terminating state, and any attempt to forcibly remove it didn’t help. First, let’s see how such a force-removal can be done, and then will check the real cause and a… Read More »
Let’s configure Opsgenie with AWS RDS. The idea is to get notifications from RDS about events and send them to Opsgenie which will send them to our Slack. To do so, we need to configure AWS Simple Notification Service and AWS RDS Event subscriptions. The official documentation is here>>>. Opsgenie confiuration Go to the Integrations… Read More »
Windows Subsystem for Linux (WSL) is a Windows subsystem that helps to run various Linux distribution directly from the Windows OS. WSL version 2 which is the default version now uses the Hyper-V virtualization under the hood to install and run Linux and share files and devices between both systems. Windows Subsystem for Linux To… Read More »
Usually, we don’t see Endpoints objects when using Kubernetes Services, as they are working under the hood, similarly to ReplicaSets which are “hidden” behind Kubernetes Deployments. Kubernetes Service So, Service is a Kubernetes abstraction that uses labels to chose pods to route traffic to, see the Kubernetes: ClusterIP vs NodePort vs LoadBalancer, Services, and Ingress… Read More »
One day our developers said that they can not create new AWS LoadBalancers via Ingress on our Kubernetes Dev cluster (AWS EKS). Balancers are created using AWS ALB Controller, see AWS Elastic Kubernetes Service: running ALB Ingress controller. Errors in the controller’s logs were: E0304 07:12:38.595113 1 controller.go:217] kubebuilder/controller “msg”=”Reconciler error” “error”=”no object matching key… Read More »