Watching logs from multiple pods in k8s (kubernetes)
In case of you wanna monitor logs from multiple instances of the same pod (aka replicas), you can just use labels to bundle logs together like this
|
1 |
kubectl logs -l app=backend-api |
Azure DevOps agent pool and pipeline issues
From time to time I observe random errors on automated pipeline run. In mosts cases is the issue caused by not specifying which agent pool or which requirements pipeline has. Error
|
1 2 |
##[warning]An image label with the label Ubuntu16 does not exist. ##[error]The remote provider was unable to process the request. |
Solution Add to pipeline
|
1 2 |
pool: vmImage: ubuntu-latest |
Traceroute alternative
From time to time I work with machines with no traceroute installed and I need to debug networking. For those purposes, you can either install it using sudo apt-get install traceroute or use some alternatives.
|
1 |
tracepath |
|
1 |
mtr |
Both should be available on Ubuntu 20.04 by default, but I am not sure if you can find them on older version or other distros. I will update this post with other linux distros and versions if I discover new tools or facts.
Terraform or Terragrunt modules from another repository in Azure DevOps
Azure DevOps (AZDO) is pretty tool, but sometimes it can be a huge pain in the ass. One painful topic is git operations. I use Terraform and Terragrunt very often to manage multiple environments so using modules is a must. To achieve stability, I am maintaining modules in separate repository with git tags. Loading external modules is same for Terraform and for Terragrunt, it uses same syntax and same commands under the hood. I am executing Terraform/Terragrunt within CICD pipelines,…
Executing into k8s pod (kubernetes)
Today I am going to save here this command. It’s very simple although I cannot remember it!
|
1 |
kubectl exec --stdin --tty pod-name-xxz -- /bin/bash |
15/10/2021 – UDPATE Because I was lazy to remember it, I wrote bash function which does most of the job instead of me. It takes one argument which is pod name and I stored in my .bashrc so it’s available everythere together with my bash.
|
1 2 3 |
kex () { kubectl exec --stdin --tty $1 -- /bin/bash } |
Links: https://kubernetes.io/docs/tasks/debug-application-cluster/get-shell-running-container/
Bash – substitute substring in a string
Today I came across interesting issue – how to remove part of the string containing slash. Full string:
|
1 |
refs/heads/releases/10 |
The desired goal is to extract releases/10 from the string. Code:
|
1 2 |
fullString=refs/heads/releases/10 echo ${fullString#refs/heads/} |
And here we go:
|
1 |
releases/10 |
Git push failed inside pipeline [Azure DevOps]
Last day I was struggling with the git error inside the pipeline. The pipeline code was simple, it should change branch into the existing one, add one file there and push it into git
|
1 2 3 4 5 6 7 8 |
- bash: | git switch $(NEW_BRANCH) git pull origin $(NEW_BRANCH) ... git add -A git commit -m "Commit message" git push origin $(NEW_BRANCH) |
However, this error occurred every time
|
1 2 3 4 5 |
error: failed to push some refs to 'https://.../_git/...' hint: Updates were rejected because a pushed branch tip is behind its remote hint: counterpart. Check out this branch and integrate the remote changes hint: (e.g. 'git pull ...') before pushing again. hint: See the 'Note about fast-forwards' in 'git push --help' for details. |
I tried many multiple things, changing git switch to git branch, tried to use git rebase – no success! But then I tried to modify pull to pure git pull – and it worked!!! Working code:
|
1 2 3 4 5 6 7 8 |
- bash: | git switch $(NEW_BRANCH) git pull ... git add -A git commit -m "Commit message" git push origin $(NEW_BRANCH) |
Why I hate MacBook and macOS
I use MacBook for a few months I have to respond to questions “Why do you like MacBook” quite often. But to be honest, there are some things I really hate! Note: I am using Macbook Air 2019, 13″, i5 1.6 GHz, 16 GB RAM and 128 GB SSD 1. Everybody claims how perfect it is But it is not. I have plenty of GUI/system/HW bugs caught on video and this can happen. But “the community” is always saying how…
Why I like MacBook and macOS
DISCALIMER: This post will be updated during time I use MacBook for a few months I have to respond to questions “Why do you hate MacBook” quite often. But to be honest, there are some things I really like! Note: I am using Macbook Air 2019, 13″, i5 1.6 GHz, 16 GB RAM and 128 GB SSD 1. Terminal I am working as a developer/DevOps so I have wide experience with Linux (8+ year) so I was missing Terminal on…
Using Gmail with Custom Domain at No Cost
I like Gmail, but sometimes I have to use the email under the different domain and I do not want to integrate my domain with google ecosystem (G-Suite). I tried to use SMTP + POP3 integration but after some DDoS attacks to smaller mail servers some of Google IPs were blacklisted and I was unable to use this integration more. So I found another way how to fix this. -1. Create Gmail of you do not have one I assume…