DEV Community: abdennour

yq for helm post-render instead of kustomize

abdennour — Mon, 21 Nov 2022 23:02:06 +0000

Spending several hours to get all resources patched with .metadata.labels using kustomize as helm post-render tool; Sometimes, the command kustomize removed an old subcommand (build)..sometimes, the command kustomize requires external plugins...etc

At the end, things works simply with a single yq command:

yq '. *= load("patch.yaml")' all.yaml

Shipping that single command inside postrender script, then use it with helm: helm template -g ./my-chart --post-renderer ./postrender

yq is a portable CLI with 0 dependencies. That's why i like it against kustomize in this use case.

Find full example in this github repo

Reduce size of /var/log/journal

abdennour — Tue, 17 May 2022 03:14:30 +0000

$ journalctl --disk-usage
Journals take up 3.8G on disk.
You can control the size of this directory using this parameter in your /etc/systemd/journald.conf:

SystemMaxUse=50M

You can force a log rotation:

$ sudo systemctl kill --kill-who=main --signal=SIGUSR2 systemd-journald.serviceNOTE: You might need to restart the logging service to force a log rotation, if the above signaling method does not do it. You can restart the service like so:

sudo systemctl restart systemd-journald.service

Mount my Passport WD driver on MacOS Big Sur with NTFS read write

abdennour — Sat, 24 Jul 2021 15:57:04 +0000

After upgrading my MacOS to big sure, i realized that some features did not work intuitively as previously. This includes my HD driver (MPassport).
Files are formatted with NTFS, and the Boss MacOS does not want to allow write.

Paid Solutions

There is iBoysoft NTFS for Mac and others.
But i solved the issue with simple script

Free Solution

Plugin your HD drive, then check its volume name under /Volumes

let's say your volume origin name (ls -l /Volumes) is MPassport.

retrieve the disk name

disk_name=$(diskutil list | grep -i passport | awk '{print $6}')

then:

origin_name=MPassport
sudo umount /Volumes/${origin_name}
sudo mkdir /Volumes/${disk_name}
sudo mount -t ntfs -o rw,auto,nobrowse /dev/${disk_name} /Volumes/${disk_name}
open /Volumes/${disk_name}

Happy read/write !

More details https://gist.github.com/CharlesThierry/7305166b208d6f6cdd37962761d5ac23

Populate env vars from .env file with Shell

abdennour — Sun, 18 Jul 2021 08:05:37 +0000

This should work

export $(cat .env | xargs)

But not all time namely if it includes some comments and you are running it with sh (not bash)

Then, mitigate this issue by using instead:

export $(cat .env | sed 's@#.*@@'| tr -d '' | xargs)

SSH over HTTP Proxy

abdennour — Sun, 25 Apr 2021 16:37:40 +0000

story

nc -X connect is the popular way to communicate with SSH over proxy. However, it's broken when your client is MacOS.

solution

Install corkscrew

brew install corkscrew

SSH now:

ssh -4 \
  -o "ProxyCommand corkscrew ip.http.proxy port-http-proxy %h %p" \
  user@ip-machine-in-other-network

.i.e: in following example my HTTP_PROXY is 192.168.1.15:3128. And i want to login into 10.11.6.23

ssh -4 \
  -o "ProxyCommand corkscrew 192.168.1.15 3128 %h %p" \
  user@10.11.6.23

Note : -4 is to force ipv4 over other options (ipv6)