Adventures in Code and IT

Author: Oliver

  • Log rotation on docker compose

    To setup log rotation on docker compose simply add this

    logging:
  driver: "json-file"
  options:
    max-size: "1k"
    max-file: "3"

    so example docker-compose.yml file

    database:
  image: postgres:14.5-alpine
  restart: always
  ports:
    - "5432:5432"
  environment:
    POSTGRES_USER: user
  volumes:
    - ./data:/var/lib/postgresql/data:rw
  logging:
    driver: "json-file"
    options:
      max-size: "1k"
      max-file: "3"

  • Volume resize on Linode Ubuntu VPS

    I recently had to upgrade the amount of storage on an external storage volume on a linode node and thought it would help to keep a note of the command to resize the volume on ubuntu

    resize2fs /dev/sdc

    where /dev/sdc is the attached volume

  • New Symfony Project

    When I start symfony projects I like to have certain things installed to start with – heres the command I run to get things setup.

    symfony new project-name --webapp

    I always start with the webapp project just because everything is always web facing I work on

    composer require template
composer require profiler --dev
composer require debug
composer require symfony/asset
composer require maker --dev
composer require symfony/orm-pack --with-all-dependencies
composer require form validator
composer require symfony/mailer
composer require symfony/apache-pack
composer require gedmo/doctrine-extensions --update-with-dependencies 
composer require stof/doctrine-extensions-bundle
composer require symfony/http-client

    after setting up the .env file for a database

    php bin/console doctrine:database:create
php bin/console make:entity
php bin/console make:migration
php bin/console doctrine:migrations:migrate

    then creating users

    composer require security
php bin/console make:user
Edit the user entity php bin/console make:entity User
php bin/console make:migration
php bin/console doctrine:migrations:migrate
php bin/console make:controller SecurityController (do not add anything to controller)
php bin/console make:auth (1, LoginFormAuthenticator, SecurityController, yes logout)
composer require symfony/expression-language
composer require symfonycasts/verify-email-bundle
php bin/console make:registration-form

  • Private Docker Registry

    I’ve recently started using a private docker registry for some docker images i’ve been using for certain projects that require special setup.

    To create the image

    docker build -t docker.example.com/directory/image:tag .

    Then I find the ID of the image using

    docker image ls

    Then when i’ve got the image ID I can tag the image

    docker tag 12345678 docker.example.com/directory/image:tag

    After that I can then push to the repository

    docker push docker.example.com/directory/image:tag

  • Handy du commands in Linux

    Transfering files between servers and making sure directory sizes match has lead me down a path of exploring the du command in detail – heres some helpful commands I’ve been using to list directory sizes. I’ve been using ubuntu but should work in debian etc too.

    To list all top level directories

    du -h -d 1

    To list all directories that match a directory name

    du -hsc Name*

    this one lists top level where directory name stars with Name and the wildcard * at the end – Name, NameOne, NameTwo etc

    Another handy feature is adding sort in reverse order with human readable sizes by piping the output into the sort command

    du -hsc Name* | sort -hr

    also watching the directory sizes whilst transferring files is helpful!

    watch -n 10 du -h -d 1

    where the -n 10 is the amount of seconds between refreshes

  • Install Docker on Ubuntu 24.04

    Just a quick snippet to remind me quickly how to install docker on Ubuntu 24.04

    curl -fsSL https://get.docker.com -o get-docker.sh
chmod a+x get-docker.sh
./get-docker.sh

  • Watch without watch

    Heres a little bash script to do what watch does without having to install watch

    Start by creating watch.sh

    #!/bin/bash

while true; do
    clear
    $2
    sleep $1  # adjust interval as needed
done

    make sure to set the permissions to be able to execute

    chmod a+x watch.sh

    execute with

    ./watch.sh 2 "du -h -d 1"

    where the first parameter is interval in seconds and the second is the command wrapped in double quotes

  • Symfony User Check Interface

    Recently needed to add a check in a symfony app where only active users could login.

    I first created a user checker interface

    <?php

namespace App\Security;

use App\Entity\User;
use Symfony\Component\Security\Core\Exception\LockedException;
use Symfony\Component\Security\Core\User\UserCheckerInterface;
use Symfony\Component\Security\Core\User\UserInterface;

class UserChecker implements UserCheckerInterface
{
    public function checkPreAuth(UserInterface $user)
    {
        if (!$user instanceof User) {
            return;
        }

        if (!$user->getActive()) {
            throw new LockedException();
        }
    }

    public function checkPostAuth(UserInterface $user)
    {
    }
}

    then registered this as a service

    # config/packages/security.yaml
security:
    firewalls:
        api:
            pattern: ^/
            user_checker: App\Security\UserChecker

  • CloudPanel Installation

    Install cloudpanel on a Ubuntu 24.04 LTS server

    ssh root@yourIpAddress

apt update && apt -y upgrade && apt -y install curl wget sudo

curl -sS https://installer.cloudpanel.io/ce/v2/install.sh -o install.sh; \
echo "2aefee646f988877a31198e0d84ed30e2ef7a454857b606608a1f0b8eb6ec6b6 install.sh" | \
sha256sum -c && sudo bash install.sh

    Once install access via

    https://yourIpAddress:8443

    Updated instructions can be found here:

    https://www.cloudpanel.io/docs/v2/getting-started/other/

  • Rclone Sync Command

    Sample of the rclone sync command thats setup to transfer 10 files at a time

    rclone sync --progress --multi-thread-streams=10 --transfers=10 /home/user/folder/ /mnt/ShareName/

    Another handy little flag is the check first flag which does all the checking first before starting transfers

    --check-first

    and always remember to dry run first

    --dry-run