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Mostrando entradas de noviembre, 2019

Understanding Liveness, Readiness and Startup Probes in Kubernetes

 This is a small article about understanding the liveness, readiness and startup in kubernetes.  There's good explanation in the kubernetes documentation: This video also explains well the process: But I wanted to understand it in a practical way. So I have this demo: It's a simple application running on a kubernetes cluster. apiVersion: apps/v1 kind: Deployment metadata: name: chat-ui spec: replicas: 1 revisionHistoryLimit: 3 selector: matchLabels: app: chat-ui template: metadata: labels: app: chat-ui spec: containers: - image: diegotc/guestbook:20230803-064434 imagePullPolicy: Always nam

Managing dynamic inventory in private subnets using bastion jump box

Managing dynamic inventory in private subnets using bastion jump box The title of post is quite large, but is something I encountered issues in the last weeks. I had a VPC in AWS, creating x amount of instances in a private network, and was quite complex to manage this instance using static inventory files. So I will explain you how to manage this problem with Ansible . Before continue, I want to say these articles are really good and can help you with this issues. Dynamic inventory Ansible (behind a jumpbox / bastion ) SSH jump hosts on CircleCI 2.0 So you will be asking, if these articles are so good, why are you writing them again? Easy, I’m doing this in Gitlab CI, and I suppose other CI will encounter similar issues. It’s not possible to connect to the instances using the instructions above. First Step We get our inventory in a dynamic way. For this we will use the inventory scripts. We need to modify the ec2.ini file with uncommenting the vpc