Tag Archives: Kubernetes

Kubernetes: PersistentVolume and PersistentVolumeClaim – an overview with examples
0 (0)

5 August 2020

For the persistent data Kubernetes provides two main types of objects – the PersistentVolume and PersistentVolumeClaim. PersistentVolume – is a storage device and a filesystem volume on it, for example, it could be AWS EBS, which is attached to an AWS EC2, and from the cluster’s perspective of view, a PersistentVolume is a similar resource… Read More: Kubernetes: PersistentVolume and PersistentVolumeClaim – an overview with examples0 (0) »

Loading

Kubernetes: ClusterIP vs NodePort vs LoadBalancer, Services, and Ingress – an overview with examples
0 (0)

24 June 2020

For network communications, Kubernetes presents four Service types – ClusterIP (the default one), NodePort, LoadBalancer, and ExternalName, plus the Ingress resources. In this post, we will take a short overview of all of them, and will check how they are working. The documentation is available here – Publishing Services (ServiceTypes). I’m using AWS Elastic Kubernetes… Read More: Kubernetes: ClusterIP vs NodePort vs LoadBalancer, Services, and Ingress –… »

Loading

Kubernetes: 503 no endpoints available for service – causes and solutions
0 (0)

15 June 2020

We have a Redis service running behind a Service with the ClusterIP type. This Redis must accessible by pods from the same namespace (a Gorush service). The problem is that those pod can’t connect to the Redis service using its gorush-server-redis-svc:6379 name and reporting “Can’t connect redis server: connection refused“: [simterm] $ kk -n gorush-test… Read More: Kubernetes: 503 no endpoints available for service – causes and… »

Loading

Helm: helm-secrets – sensitive data encryption with AWS KMS and use it with Jenkins
0 (0)

16 May 2020

So, as a follow-up to the Helm: Kubernetes package manager – an overview, getting started post – let’s discuss about sensitive data in our Helm charts. What I want is to store a chart files in a repository, but even if such a repo will be a private Github repo – I still don’t want… Read More: Helm: helm-secrets – sensitive data encryption with AWS KMS and… »

Loading

Helm: Kubernetes package manager – an overview, getting started
0 (0)

3 May 2020

The official documentation calls Helm as a “The package manager for Kubernetes“, but in fact, Helm is something bigger than just a package manager – it’s more an application controlling tool for their installation, managing, upgrading, configuration, etc. In this post, we will take an overview of Helm in general, its Charts, templates, variables, and… Read More: Helm: Kubernetes package manager – an overview, getting started0 (0) »

Loading

AWS Elastic Kubernetes Service: a cluster creation automation, part 2 – Ansible, eksctl
0 (0)

1 May 2020

The first part – AWS Elastic Kubernetes Service: a cluster creation automation, part 1 – CloudFormation. To remind the whole idea is to create an automation process to create an EKS cluster: Ansible uses the cloudformation module to create an infrastructure by using an Outputs of the CloudFormation stack created – Ansible from a template will… Read More: AWS Elastic Kubernetes Service: a cluster creation automation, part 2… »

Loading

Kubernetes: monitoring with Prometheus – exporters, a Service Discovery, and its roles
0 (0)

26 April 2020

The next task with our Kubernetes cluster is to set up its monitoring with Prometheus. This task is complicated by the fact, that there is the whole bunch of resources needs to be monitored: from the infrastructure side – ЕС2 WokerNodes instances, their CPU, memory, network, disks, etc key services of Kubernetes itself – its… Read More: Kubernetes: monitoring with Prometheus – exporters, a Service Discovery, and… »

Loading

AWS Elastic Kubernetes Service: a cluster creation automation, part 1 – CloudFormation
0 (0)

24 April 2020

The task is: create automation to roll out an AWS Elastic Kubernetes Service cluster from scratch. Will use: Ansible: to automate CloudFormation stack creation and to execute eksctl with necessary parameters CloudFormation with NestedStacks: to create an infrastructure – VPC, subnets, SecurityGroups, IAM-roles, etc eksctl: to create a cluster itself using resources created by CloudFormation… Read More: AWS Elastic Kubernetes Service: a cluster creation automation, part 1… »

Loading

AWS Elastic Kubernetes Service: running ALB Ingress controller
0 (0)

21 April 2020

AWS ALB Ingress Controller for Kubernetes – is a Kubernetes controller which actually controls AWS Application Load Balancers (ALB) in an AWS account when an Ingress resource with the kubernetes.io/ingress.class: alb annotation is created in a Kubernetes cluster. This Ingress resource in its turn describes an ALB Listeners configuration with SSL termination or traffic routing… Read More: AWS Elastic Kubernetes Service: running ALB Ingress controller0 (0) »

Loading