Containers on Jose Castrillo

👨‍💻 Tunning your Devbox shell

Fri, 26 Jul 2024 00:00:00 +0000

Using Oh-My-Bash with Jetify Devbox: A Step-by-Step Guide

If you’re a developer working with Jetify Devbox, you might have noticed that its shell environment doesn’t always play nicely with Oh-My-Bash. By following these steps, you can customize and personalize your themes and PS1 prompt to create a more enjoyable and productive shell experience.

Step 1: Install Oh-My-Bash

First, you need to install Oh-My-Bash. You can do this by running the following command in your terminal:

Automation a Nextcloud as a Podman Container

Sun, 30 Jun 2024 00:00:00 +0000

I’ve been thinking to upgrade my Nextcloud service also switching to another alternative rather than docker, hence I used podman and buildah in my solution.

From the rockylinux.org I found a nice post where it describes how to build and provisioning by using buildah and podman, it works pretty good and I added a tool in order to run it faster, called taskfile.

Requirements:

Podman
Buildah
Taskfile

Install taskfile
Clone my project
From the project you can see the task defined:

version: "3"

tasks:
  up-db:
    dir: "db/mariadb"
    preconditions:
      - test -f db-init.sh
    cmds:
      - bash db-init.sh

  create-app:
    dir: "app"
    preconditions:
      - test -f run.sh
    cmds:
      - mkdir nc nc/nextcloud nc/apps nc/config nc/data
      - task: up-db
      - bash run.sh

  build_base:
    dir: "db/base"
    preconditions:
      - test -f build.sh
    cmds:
      - bash build.sh

  build_tools:
    dir: "db/db-tools"
    preconditions:
      - test -f build.sh
    cmds:
      - bash build.sh

  build_maria:
    dir: "db/mariadb"
    preconditions:
      - test -f build.sh
    cmds:
      - bash build.sh

  build_db:
    cmds:
      - task: build_base
      - task: build_tools
      - task: build_maria

  up-app:
    cmds:
      - podman container start nextcloud

Main task to build and run nextcloud:

Upgrading major version Nextcloud

Sat, 20 May 2023 00:00:00 +0000

For those who have been facing the “Maintenance mode active” after applied a nextcloud upgrade by switching container image version, due a major versioning issue.

Even when you issue the occ upgrade into continer you gets hit by something like below:


www-data@87401bdd2fa8:~/html$ php /var/www/html/occ upgrade
Nextcloud or one of the apps require upgrade - only a limited number of commands are available
You may use your browser or the occ upgrade command to do the upgrade
Setting log level to debug
Exception: Updates between multiple major versions and downgrades are unsupported.
Update failed
Maintenance mode is kept active
Resetting log level

Keep a eye on this part: Updates between multiple major versions and downgrades are unsupported. as I was running 25 version I can no jump for above 27, if that’s our case, we can edit the file app/config/config.php edit the version of your nextcloud like below:

How to deploy Wordpress + Mariadb using Docker

Sat, 08 Aug 2020 00:00:00 +0000

Below you will see the statement I used to deploy a Wordpress as db mariadb (mysql); I shared it to you, cos I’ve been looking out for a good .yml statement piece, but some of them are older or put other set frontend as nginx, etc. I did a simple and easier deployment statement, so here we have:


version: '3.3'

services:
   wordpress:
     depends_on:
       - db
     image: wordpress:latest
     volumes:
       - ./html:/var/www/html
     ports:
       - "8080:80"
     restart: always
     environment:
       WORDPRESS_DB_HOST: db:3306
       WORDPRESS_DB_USER: wordpress
       WORDPRESS_DB_PASSWORD: password
     links:
       - db
     depends_on:
       - db

   db:
     image: mariadb:10.5.4-focal
     volumes:
       - ./db_data:/var/lib/mysql
     restart: always
     environment:
       MYSQL_ROOT_PASSWORD: SECRET
       MYSQL_DATABASE: wordpress
       MYSQL_USER: wordpress
       MYSQL_PASSWORD: password
     ports:
       - "3306:3306"

You can switch the local mount to volume mount it will depend of you design.

Setup Podman service in Silverblue by Systemd

Tue, 07 Jul 2020 00:00:00 +0000

Into my Devops learning path 👨‍💻 I decided to deploy a monitoring centre into my workstation where I could be able to watch my containers, resources, logs, etc and continue improving my knowledge, in my case I’m using Silverblue developed by Fedora so in here it’s a little bit different the setup; as monitoring tool I choose Cockpit for its great integration and support.

Workstation: Silverblue 🖥️
Container engine: Podman ⚙️
Monitoring tool(app/service):Cockpit 📦

I splinted out the instructions in 4 simple parts:

Docker Container "before start"

Sun, 26 Jan 2020 00:00:00 +0000

Part I

Containers are environments that host individual applications using a framework like Docker.

Docker Editions:

Docker CE ( community edition ) free version
Docker EE ( enterprise edition) Paid

Versions:

Stable, released every 4 months.
Edge (beta) released every month. For testing
EE, support for one year.

Example how to create a container:

$docker container run --publish 80:80 --detach --name webhost nginx

detach: subcommand is to let run the container and keep use the command prompt name: create a container’s name.

How to create a docker-compose.service

Sun, 08 Sep 2019 00:00:00 +0000

Here are the steps I made to set a service into my Fedora server to start/stop my Docker-compose (Wikijs)

Why I decided to use a docker-compose into a Linux VM machine? —> for make it more stable, faster,portable, isolated, etc.

First I stared using Docker for Windows and it was a little bit unstable and not quite easy to handled, so when I switched to Docker compose into a Fedora VM and in that point it was a huge different(I do not recommend to use Docker in Windows); I use a Vmware hypervisor ( in the office we use it ).

Backup your Wikijs DB

Mon, 15 Jul 2019 00:00:00 +0000

This is a little resume of how I’m doing a backup procedure of my wikijs database based in Docker-compose.

Below are the systems used in my enviroment:

Project: Wikijs 2.0 Beta
Platform: Docker-Compose
DB: Postgres (9.6.14)
Server: Fedora Server 30.x86_64
Workstation: Windows 10 (provided by work) 😬

PSQL basic commands:

Here are 4 basic commands I use to connect into my Postgre DB and check out DB list and quite.

$psql -h localhost -p 5416 -U <my-user> -d <my-database>

Disable live-restore to run Docker Swarm

Thu, 28 Mar 2019 00:00:00 +0000

The following instruction is a solution when you got an error response with live-restore using Docker Swarm in Fedora 28 or highter

$ docker swarm init
Error response from daemon: --live-restore daemon configuration is incompatible with swarm mode

That’s not possible to enable Live-restore and Swarm-mode together.

First make sure that the SElinux is Permissive or Disabled.

$ sestatus

SELinux status:                 enabled
SELinuxfs mount:                /sys/fs/selinux
SELinux root directory:         /etc/selinux
Loaded policy name:             targeted
Current mode:                   permissive
Mode from config file:          enforcing
Policy MLS status:              enabled
Policy deny_unknown status:     allowed
Memory protection checking:     actual (secure)
Max kernel policy version:      31

Then remove the –live-restore line from the /etc/sysconfig/docker

Pulling Mysql using Docker Hub into Linux workstation

Thu, 28 Mar 2019 00:00:00 +0000

$ systemctl start docker
$ systemctl status docker
$ docker pull mysql
$ docker image ls
$ docker run --name db -e MYSQL_ROOT_PASSWORD=mysql123 -d mysql

Use the docker exec -it command to start a mysql client inside the Docker container you have started, like the following:

$ docker exec -it db mysql -uroot -p