Tag Archives: Kubernetes

Kubernetes: part 5 — RBAC authorization with a Role and RoleBinding example

26 March 2020
 

 The next task is to add a new user who will have access to check pods state and watch logs – any other operations must be prohibited. AWS EKS uses AWS IAM for authentification in a Kubernetes cluster (check the Kubernetes: part 4 – AWS EKS authentification, aws-iam-authenticator and AWS IAM post for details), bot… Read More »

Linux: PHP-FPM, Docker, STDOUT and STDERR – no an application’s error logs

24 February 2020
 

 We have a Docker image with NGINX, PHP-FPM, and Supervisor. In the same image, we have our PHP application included, which outputs its errors to the /dev/stderr as per its php.ini file: … [global] error_log=/dev/stderr … The problem is, that if run kubectl logs –  there will be no error output from the application. So,… Read More »

PHP: PHP-FPM ignores environment variables – solutions

19 February 2020
 

 We have a PHP-based application running in Kubernetes and uses settings from a /app/.env file plus environment variables. The problem is that application running in a Docker container can’t see an $TEST_VAR variable although it’s present in the Deployment: … containers: – name: application-dev-web image: bttrm-application:119 … – name: TEST_VAR valueFrom: secretKeyRef: name: bttrm-app-secret key:… Read More »

Kubernetes: running metrics-server in AWS EKS for a Kubernetes Pod AutoScaler

15 February 2020
 

 Assuming, we already have an AWS EKS cluster with worker nodes. In this post – we will connect to a newly created cluster, will create a test deployment with an HPA – Kubernetes Horizontal Pod AutoScaler and will try to get information about resources usage using kubectl top. Kubernetes cluster Create a test cluster using… Read More »

Kubernetes: running a push-server with Gorush behind an AWS LoadBalancer

6 February 2020
 

 Gorush is a Go-written application which we are planning to use to send push notifications to our mobile clients. The project’s home – https://github.com/appleboy/gorush The service will be running in our Kubernetes cluster in a dedicated namespace and must be accessible within the cluster’s VPC only, so we will use an Internal ALB from AWS.… Read More »

Kubernetes: part 4 – AWS EKS authentification, aws-iam-authenticator and AWS IAM

3 September 2019
 

  Let’s proceed with our AWS Elastic Kubernetes Service, EKS. Previous parts: Kubernetes: part 1 – architecture and main components overview Kubernetes: part 2 – a cluster set up on AWS with AWS cloud-provider and AWS LoadBalancer Kubernetes: part 3 – AWS EKS overview and manual EKS cluster set up. In the previous – Kubernetes:… Read More »

Kubernetes: part 3 – AWS EKS overview and manual EKS cluster set up

15 August 2019
 

 Let’s proceed with our Kubernetes journey. Previous parts: Kubernetes: part 1 – architecture and main components overview Kubernetes: part 2 – a cluster set up on AWS with AWS cloud-provider and AWS LoadBalancer In this part we will start working with AWS Elastic Kuberneters Service (EKS) – its short overview, then will create Kubernetes Control… Read More »

Kubernetes: part 2 – a cluster set up on AWS with AWS cloud-provider and AWS LoadBalancer

10 August 2019
 

 In the first part – Kubernetes: part 1 – architecture and main components overview – we did a quick glance about Kubernetes. Also, check the third part – Kubernetes: part 3 – AWS EKS overview and manual EKS cluster set up. The next thing I’d like to play with is to manually create a cluster… Read More »