Containers

Monitoring with Cockpit

On this post we are going to talk about cockpit how to monitoring and manage your GNU/Linux infrastructure. Based on the official description, Cockpit project is pretty easy to use, install and integrate, you can manage and add servers by ssh credentials to your dashboard, showing logs, monitoring containers(podman/docker), services running, disk usage, etc. I’ve using it around 1 year, the only thing I cannot see it’s an alert tool or event trigger, maybe for the next release; is developed by RH team and open source, it’s already integrated in some of the GNU/Linux distribution ( RH, debian, ubuntu, fedora, etc). ...

Open a Nextcloud's DB through a ssh connection

The following post explains how to open and connect your Nextcloud’s DB (MariaDB) by a ssh tunnel. Field description: Server side(GNULinux): Nextcloud: running on Docker-compose engine. OS: Debian with Docker compose installed. Database: MariaDB. Localhost side(GNULinux): OS: Fedora. CLient: Dbeader 7.2.5 Further information you can go to my docker compose Statement here. Edit your docker-compose.yml and add the “ports” key into the statement. $ nano docker-compose.yml ports: - 5555:3306 port: 5555 –> Host. port: 3306 –> Container. From the above the port “5555” it was used as example. ...

How to deploy Wordpress + Mariadb using Docker

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

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"

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

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

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

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

$ 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

Enable "Kubectl" auto-completion in the Shell (Linux)

When you’ve done the SDK installation in your Linux workstation. list the components you have installed, then you will see the full list additional components from gcp SDK: gcloud components list gcloud components install <COMPONENT_ID> gcloud components install kubectl Then follow the instruction from the kubernetes official documentation, check the “bash-completion” and finally issue the command below: echo "source <(kubectl completion bash)" >> ~/.bashrc Even you can go directly through your .bashrc (sudo) to add manually, it should look like: ...