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Mostrando entradas de 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

Ansible using plugins for dynamic inventories

This is a small post about how to use inventory plugins in Ansible. If you are looking the script way I recommend to read this article: It explains really good this or you can watch this video: But if you’re looking to use inventory this article can help you. First of all, why should I used inventory if all over the internet they’re using the python scripts? Well, Ansible recommends it: Inventory plugins take advantage of the most recent updates to Ansible’s core code. We recommend plugins over scripts for dynamic inventory. You can write your own plugin to connect to additional dynamic inventory sources. The actual ansible guide is quite good, but there was a step that got me confused, probably my english isn’t so good and I didn’t understood it. We need to ena

Display GIT branch in the terminal

I encounter with this issue how to make possible to display my GIT branch in the console. I found the answer in ASK UBUNTU: Step 1 nano ~/. bashrc Step 2 Add the following code at the end of the line # Show git branch name force_color_prompt = yes color_prompt = yes parse_git_branch () { git branch 2 > / dev / null | sed - e '/^[^*]/d' - e 's/* \(.*\)/(\1)/' } if [ "$color_prompt" = yes ]; then PS1 = '${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[01;31m\]$(parse_git_branch)\[\033[00m\]\$ ' else PS1 = '${debian_chroot:+($debian_chroot)}\u@\h:\w$(parse_git_branch)\$ ' fi unset color_prompt force_color_prompt Step 3 Reload the file source ~/. bashrc